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Pacific Southwest, Region 9: Superfund

Serving Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations

San Gabriel Valley (area 2) Baldwin Park

Superfund Site

Baldwin Park Operable Unit

Administrative Record Index

To request copies of administrative record documents, an electronic order form is available.

This administrative record file contains the documents that the U.S. Environmental Protection Agency (EPA) is currently using to identify appropriate remedial activities for the San Gabriel Valley Area 2 Superfund Site, Baldwin Park Operable Unit in Los Angeles County, California. It is presented in two media: the Compact Disk (CD) and companion binders of large format documents.
Documents now in the administrative record include a Remedial Investigation, Feasibility Study, Proposed Plan, and the Record of Decision. For ease of viewing these documents are listed on the CD as "Key Documents." One videotape document (document #41) is available for viewing by arrangement with the Superfund Records Center in San Francisco.

The administrative record includes numerous data validation reports in which the sampling locations are identified by an EPA sample identification number. To translate the sample identification number into a well name or number, look in the document which contains the associated cross-reference list. (see Data Validation Reports Cross-Reference Key at the end of this file or use the paper copy which accompanies the CD in a companion binder.)

EPA welcomes questions and comments on documents contained in the administrative record file. Please contact:

Wayne Praskins or: Don Hodge
Remedial Project Manager Community Involvement Coordinator
U.S. EPA (SFD-7-3) U.S. EPA (SFD-3)
75 Hawthorne Street 75 Hawthorne Street
San Francisco, CA 94105-3901 San Francisco, CA 94105-3901
(415) 972-3181 (415) 972-3240 or 1-800-231-3075

What is an Administrative Record?

An administrative record is a collection of documents which forms the basis for an agency's decision, in this case the selection of a response action at a Superfund site. This does not mean that only documents which support a response decision are placed in the administrative record. Relevant documents that were relied upon in selecting the response action, as well as relevant documents that were considered but ultimately rejected, are included. The administrative record also acts as a vehicle for public participation in selecting a response action.

Under section 113(K) of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), as amended by the Superfund Amendments and Reauthorization Act (SARA), the U.S. Environmental Protection Agency (EPA) is required to establish an administrative record for every Superfund response action and to make a copy of the administrative record available at or near the site. The administrative record must be reasonably available for public review during normal business hours and should be treated as a non-circulating reference document. Questions regarding the maintenance of the administrative record file should be directed to:

Elaine Chan, Administrative Record Coordinator, U.S. EPA (SFD-7-B), 75 Hawthorne Street, San Francisco, CA 94105-3901, Phone: (415) 744-2380

How to obtain copies of administrative record documents:

Individuals may copy any documents contained in the administrative record file according to the procedures at the local repository or request a copy of the CD by calling the Superfund Records Center at (415) 536-2000.

List of Abbreviations and Acronyms Used in Administrative Record Index

AbbreviationMeaning
ABAssembly bill
ARAR Applicable or relevant and appropriate restriction (or requirement)
attchattachment
BTPBasinwide technical plan
CAState of California
CBECitizens for a Better Environment
CDCCenters for Disease Control and Prevention
CERCLAComprehensive Environmental Response, Compensation, and Liability Act of 1980
CFESTCoupled fluid, energy, and solute transport
CFRCode of Federal Regulations
CLPContract laboratory program
contcontract
CRWQCBCA Regional Water Quality Control Board
CWAClean Water Act
dev developing
DTSC(CA) Dept of Toxic Substances Control
DWPCity of Los Angeles - Dept of Water & Power
EMSL-LVEnvironmental Monitoring Systems Laboratory, Las Vegas
EPAEnvironmental Protection Agency
ex exemption
FITField Investigation team
FOIAFreedom of Information Act
fr from
FS feasibility study
GACGranular activated carbon
GISGeographic information system
govtgovernment
GWgroundwater
info information
investiginvestigation
IRMInitial remedial measures
LALos Angeles
LACFCDLos Angeles County Flood Control District
ltr letter
memo memorandum
MSGBWMain San Gabriel Basin Watermaster
mtgmeeting
MWMonitoring well
MWDSCMetropolitan Water District of Southern California
NDMANitrosodimethylamine
NPDESNational Pollutant Discharge Elimination System
NPLNational Priority List
OSCOOil & Solvent Process Co
OSWEREPA Office of Solid Waste and Emergency Response
OU operable unit
OUFSOperable unit feasibility study
pppages
PPBParts per billion
projproject
PRP potentially responsible party
QAQuality assurance
QA/QCQuality assurance/quality control
QAPPQuality Assurance Project Plan
RARemedial Action
RCRA Resource Conservation and Recovery Act
re regarding
ref referencing
regregional
RDRemedial Design
RFDReference dose
RI Remedial Investigation
RI/FSRemedial Investigation/Feasibility Study
ROC record of communication
RODRecord of Decision
ROD/SSPRecord of Decision/Supplemental Sampling Program
RPMRemedial Project Manager
RPORegional Project Officer
rpt report
rtgrouting
SAPSampling & Analysis Program
SASSpecial analytical services
SBSenate bill
SCAQMDSourth Coast Air Quality Management District
SCHState Clearinghouse
SEMPOASouth El Monte Property Owners Association
SGSan Gabriel
SGVSan Gabriel Valley
SGVWCSan Gabriel Valley Water Co
SOW Statement of work
SSCSuperfund State Contract
SSPSupplemental Sampling Program
SVOASemi-volatile Organic Analysis
SWRCBState Water Resources Control Board
techtechnical
TL transmittal letter
USGVMWDUpper San Gabriel Valley Municipal Water District
vvolume
VOA volatile organic analysis
VOC volatile organic compound
w/ with
w/o without
WAWork Assignment
WIPWell Investigation Program


Data Validation Reports Cross-Reference Key
Doc #Cross-References to Doc #Doc #Cross-References to Doc #
184111323199511324
184211323199611324
184311323199711324
185111323199811324
18521132320062005
185311323214611893
185411323214711893
185511323216311893
185611323216611893
18571132325691525
18581132325731525
18591132325741525
18601132325751525
19711132425761525
19811132425771525
19821132425861525
19831132425871525
19841132425881525
19851132425891525
19861132425981525
198711324260111893
198811324260211893
1989113241038511893
199011324104301525
19912005104331525
199211324104341525
199311324104351525
199411324104361525

Administrative Record Index

Date (mm/dd/yy)AuthorAddresseeSubjectDoc. ID #
-Robert Clark
Environmental Protection Agency - Risk Reduction Engineering Laboratory

Thomas Speth
Environmental Protection Agency - Risk Reduction Engineering Laboratory

Benjamin Lykins, Jr
Environmental Protection Agency - Risk Reduction Engineering
-Article: EPA research program in granular activated carbon (GAC)1430
1/1/64CA Superior Court - Los Angeles County-Stipulation for judgment, #722,647 - Board of Water Commissioners of City of Long Beach, et al vs San Gabriel Valley Water Co, et al, w/exhibit 1, judgment2734
3/1/66CA Dept of Water Resources-Planned utilization of groundwater basins, San Gabriel Valley, appendix A, geohydrology [Bulletin 104-2]2735
1/1/68Kakusaburo Onda
Univ of Nagoya

Hiroshi Takeuchi
Univ of Nagoya

Yoshio Okumoto
Univ of Nagoya
-Article: Mass transfer coefficients between gas & liquid phases in packed columns (Journal of Chemical Engineering of Japan (1968), v1, #1:56-62)1429
1/4/73CA Superior Court - Los Angeles County-Judgment - Upper San Gabriel Valley Municipal Water District vs City of Alhambra, et al, w/exhibits [#924128]1232
1/1/79J Hoigne
Swiss Federal Institute for Water Resources

H Bader
Swiss Federal Institute for Water Resources
-Article: Ozonation of water - selectivity & rate of exidation of solutes (Ozone, Science & Engineering (1979), v1: 73-85)1428
8/28/81Edmund Brown, Jr
CA Governor's Office
Sheila Prindiville
Environmental Protection Agency - Region 9
Ltr: Notification of designation of CA Dept of Health Services as lead agency to carry out state hazardous waste responsibilities6154
7/13/83LeRoy Crandall & AssocSouthwestern Portland Cement CoGroundwater monitoring plan, Azusa Western Landfill site, Azusa, w/TL 7/13/834977
5/1/84C H 2 M Hill-Final community relations plan, San Gabriel sites5789
6/1/84Environmental Protection Agency - Region 9-Fact sheet: San Gabriel Basin site RI/FS, w/ltr 6/6/84 fr EPA to interested individuals, groups, agencies & officials5060
9/24/84Environmental Protection Agency - Region 9-Press release: EPA approves groundwater investigation & feasibility study in San Gabriel Valley5782
10/2/84Joe Blackstock
San Gabriel Valley Tribune, Inc
-Newsclip: EPA to investigate Valley underground water supply10284
10/26/84LeRoy Crandall & AssocSouthwestern Portland Cement CoCompletion rpt, construction of 3 monitoring wells & groundwater monitoring rpt - Azusa Western Landfill, Azusa1499
12/7/84Thomas Stetson
Stetson Engineers, Inc
Gary Yamamoto
CA Dept of Health Services
Ltr: Transmittal of & request for approval on final AB 1803 water analysis plan for Main San Gabriel Basin, w/attch5712
12/7/84Thomas Stetson
Stetson Engineers, Inc
Gary Yamamoto
CA Dept of Health Services
Ltr: Transmittal of & request for approval on final AB 1803 water analysis plan for Main San Gabriel Basin - plate 6, map of potential sources of organic chemicals & monitoring wells within main San Gabriel basin, rev 1 (36 inches x 58 inches)(attch only)34210
12/17/84Ken Reich
Montgomery Laboratories
Neil Ziemba
Environmental Protection Agency - Region 9
Ltr: Supplemental quality control for San Gabriel Basin AB 1803, w/laboratory quality control procedures & description of facilities5451
12/30/84Mike Ward
Los Angeles Times
-Newsclip: San Gabriel water contamination a mystery after 5 years10216
1/1/85Environmental Protection Agency - Region 9-Fact sheet: Environmental News - San Gabriel Basin, supplemental sampling program5749
1/11/85Keith Takata
Environmental Protection Agency - Region 9
Thomas Stetson
Stetson Engineers, Inc
Ltr: Transmittal of & request for comments on workplan, sampling plan QAPP & site safety plan for supplemental sampling program, w/o attch (unsigned)5945
1/21/85Keith Takata
Environmental Protection Agency - Region 9
Thomas Stetson
Stetson Engineers, Inc
Ltr: Request for comments on workplan, sampling plan, QAPP & site safety plan & description of documents, w/concurrence copy, w/o workplans, etc6145
2/5/85Steven Conklin
C H 2 M Hill
-Partial sampling plan, San Gabriel Areas 1-4 RI, w/TL to N Ziemba & TL to Harold Takenaka 2/7/855950
2/5/85Steven Conklin
C H 2 M Hill
-Partial sampling plan, San Gabriel Areas 1-4 RI - plate 1, assumed groundwater contamination plume areas & wells proposed for sampling under AB 1803 (36 inches x 56 inches ) (attch only)34274
2/10/85Mike Ward
Los Angeles Times
-Newsclip: 10 Azusa wells among targets of water inquiry, w/TL 3/1/85 fr R Lofy, Lockman & Assoc to N Ziemba5738
2/13/85Albert Frias
San Gabriel Valley Tribune, Inc
-Newsclip: Compounds suspected - Azusa well testing urged10283
3/12/85Steven Conklin
C H 2 M Hill
-Sampling plan for wells in vicinity of Aerojet ElectroSystems & for general SSP, San Gabriel areas 1-4 RI5832
3/12/85Steven Conklin
C H 2 M Hill
-Sampling plan for wells in vicinity of Aerojet ElectroSystems & for general SSP, San Gabriel areas 1-4 RI - plate 6, map of potential sources of organic chemicals & monitoring wells within Main San Gabriel basin (34 inches x 56 inches) (attch only)34231
3/19/85Thomas Bailey
CA Dept of Health Services
Jane Bray
Upper San Gabriel Valley Municipal Water District
Ltr: Notification that CA Dept of Health Services decided to return cooperative agreement to EPA & transfer lead responsibility fr Dept to EPA, w/envelope5539
4/2/85Harold Takenaka
Environmental Protection Agency - Region 9
Laura Tom
Environmental Protection Agency - Region 9

Neil Ziemba
Environmental Protection Agency - Region 9

Chip Demarest
Environmental Protection Agency - Region 9

Peter Rubenstein
Environmental Protection Agency - Region 9
Memo: Transmittal of & request for comments on sampling plan for wells in vicinity of Aerojet ElectroSystems & for general SSP, San Gabriel areas 1-4 RI dated 3/12/85, w/handwritten comments by B Buck34246
4/30/85Trudy Deihl -Review of analytical data - CASE/SAS #3912/1528Y, analysis of pesticides, YA 236, 238-240, w/TL fr H Takenaka to P Bisson, 5/6/85 [Cont #68-01-6791]10433
5/1/85Environmental Protection Agency - Region 9-Tables: Results of well sampling analyses, 2/85-5/85, for Miller Brewing, City of Azusa, Transit Mix, etc, w/chain of custody forms2570
5/20/85Ferdinand Schuette
Environmental Protection Agency - Region 9
-Review of analytical data, QA/QC - CASE/SAS #3912/1528Y, analysis of selenium, hydrazine, perchlorate, w/TL fr H Takenaka to P Bisson, 5/22/852586
5/20/85Trudy Deihl -Review of analytical data - CASE/SAS #3912/1528Y, analysis of thiourea, w/TL fr H Takenaka to P Bisson, 6/3/8510435
5/22/85Vlasta Felix


Trudy Deihl
-Review of analytical data - CASE/SAS #3912/1528Y, analysis of pesticides, YA 280 thru 284, YA 257 thru 261, w/TL fr H Takenaka to P Bisson, 5/28/8510434
5/28/85Trudy Deihl -Review of analytical data - CASE/SAS #3912/1528Y, analysis of acid/base neutral & SAS, w/TL fr H Takenaka to P Bisson, 5/28/852573
6/18/85Vlasta Felix -Review of analytical data - CASE/SAS #3912/1528Y, analysis of volatiles, w/TL fr H Takenaka to J Clifford, 6/25/852587
6/25/85Trudy Deihl -Review of analytical data - CASE/SAS #3912/1528Y, analysis of B/N/A & SAS, w/TL fr H Takenaka to P Bisson, 7/1/852574
6/25/85Trudy Deihl -Review of analytical data - CASE/SAS #3912/1528Y, analysis of B/N/A & SAS, sample #YA273-YA279, w/TL fr H Takenaka to P Bisson, 7/10/852575
6/26/85Trudy Deihl -Review of analytical data - CASE/SAS #4188/1629Y, analysis of thiourea, w/TL fr H Takenaka to P Bisson, 7/1/8510430
7/1/85Trudy Deihl -Review of analytical data - CASE/SAS #4188/1629Y, analysis of SAS inorganics, w/TL fr H Takenaka to P Bisson, 7/17/852588
7/28/85James Johnson
Environmental Protection Agency - Region 9
-Review of analytical data - CASE/SAS #4188/1629Y, analysis of volatiles/semi-volatiles & SAS, w/TL fr H Takenaka to P Bisson, 9/18/852589
8/1/85Vlasta Felix -Review of analytical data - CASE/SAS #4189/1629Y, analysis of volatiles, semi-volatiles, w/TL fr H Takenaka to P Bisson, 8/16/852576
8/21/85Vlasta Felix
Maxwell Laboratories, Inc - S-CUBED Laboratory
-Review of analytical data - CASE/SAS #4189/1629Y, analysis of volatiles, semi-volatiles, 10 samples, w/TL 8/28/85 fr H Takenaka to P Bisson2577
9/17/85Trudy Deihl -Review of analytical data - CASE/SAS #3912, analysis of pesticides, w/TL fr H Takenaka to P Bisson, 10/3/8510436
9/18/85Tammy Jones
Environmental Protection Agency - Region 9
-Review of analytical data - CASE/SAS #4188/1629Y, analysis of volatiles/semi-volatiles & SAS, w/TL fr H Takenaka to P Bisson, 9/18/852590
10/11/85Clinton Graden
Environmental Protection Agency - Region 9
-Review of analytical data - CASE/SAS #4189/1629Y, analysis of VOA, semi-VOA, w/TL fr M Tunzi to P Bisson, 10/15/852569
10/11/85Environmental Protection Agency - Region 9-Press release: Environmental News - San Gabriel Valley Water District (Upper San Gabriel Valley Municipal Water District) 1st local agency to receive direct funding under Superfund program for technical assistance to EPA5628
10/27/85Anne Richardson
San Gabriel Valley Tribune, Inc
-Newsclip: Groundwater contamination plan for Valley 3 years away10215
11/12/85Mike Bitner
C H 2 M Hill
Stetson Engineers, IncData sets used in model for recharge fr spreading basins & riverbed percolation as estimated by LA County Flood Control Dist, water years 77/78 thru 83/84, w/TL 1/7/875965
12/5/85Environmental Protection Agency - Region 9-(Outline of) testimony by EPA re San Gabriel & San Fernando (before) Assembly Committee on Environmental Safety & Toxic Materials on 12/5/855758
12/8/85Mike Ward
Los Angeles Times
-Newsclip: 'Comedy of errors' over, water cleanup begins, officials say, w/photos of Assemblywoman S Tanner & EPA's K Takata at contamination hearing10285
12/26/85Keith Takata
Environmental Protection Agency - Region 9
Jane Bray
Upper San Gabriel Valley Municipal Water District
Ltr: Lab results fr EPA San Gabriel Valley supplemental sampling program (SSP) & detection of perchlorate ion, w/perchlorate QA review rpts2650
2/14/86C H 2 M Hill-Cross reference lists for lab rpts for EPA sampling completed as part of supplemental sampling plan between 2/12/85 & 5/14/85 (cross-references "Review of analytical data" documents 2569, 2573 thru 2577, 2586 thru 2589, 2598, 10430, 10433 thru 10436)1525
2/26/86Neil Ziemba
Environmental Protection Agency - Region 9
James van Wagner
Valley County Water District
Ltr: Results of analyses of water samples taken fr Valley County Water District well(s) in Baldwin Park, w/charts, w/o mail receipt #P000-399-1122466
2/26/86Neil Ziemba
Environmental Protection Agency - Region 9
Joseph Hsu
City of Azusa
Ltr: Results of analyses of water samples taken fr City of Azusa well(s), w/charts, w/o mail receipt #P000-399-11010755
2/26/86Neil Ziemba
Environmental Protection Agency - Region 9
William Temple
Covina Irrigating Co
Ltr: Results of analyses of water samples taken fr Covina Irrigating Co well(s), w/charts, w/o mail receipt #P000-399-11110756
2/26/86Neil Ziemba
Environmental Protection Agency - Region 9
Edward Heck
Azusa Valley Water Co
Ltr: Results of analyses of water samples taken fr Azusa Valley Water Co well(s), w/charts, w/o mail receipt #P000-399-11410758
2/26/86Neil Ziemba
Environmental Protection Agency - Region 9
Arthur Cook
City of Glendora
Ltr: Results of analyses of water samples taken fr City of Glendora well(s), w/charts, w/o mail receipt #P000-399-11510759
2/26/86Neil Ziemba
Environmental Protection Agency - Region 9
Ray Jarceki
Transit Mixed Concrete Co
Ltr: Results of analyses of water samples taken fr Transit Mix well(s), w/charts, w/o mail receipt #P000-399-11610760
5/19/86C H 2 M Hill-Draft San Gabriel supplemental sampling program rpt, v1 of 3, text5257
5/19/86C H 2 M Hill-Draft San Gabriel supplemental sampling program rpt, v2 of 3 & v3 of 3, appendices5258
5/19/86C H 2 M Hill-Draft San Gabriel supplemental sampling program rpt, v1 of 3, text - plate 1, extent of TCE contamination, plate 2, extent of PCE contamination, plate 3, CTC contamination & plate 4, groundwater contamination map (42 inches x 58 inches) (attchs only)34314
6/27/86Paul Chrostowski
I C F/Clement

Sara Foster
I C F/Clement
-Article: Integrated household exposure model for use of tap water contaminated with volatile organic chemicals (VOC)1439
8/1/86Environmental Protection Agency - Region 9-Fact sheet: San Gabriel Basin sites - EPA investigates groundwater contamination, releases supplemental sampling program rpt5621
8/29/86Jane Bray
Upper San Gabriel Valley Municipal Water District
Groundwater UserLtr: Request for complete & up-to-date info on wells sent to water purveyors, w/o attchs5642
10/13/86Lee Garber
San Gabriel Valley Tribune, Inc
-Newsclip: Officials to launch fight on water contamination, w/maps showing water table contaminants TCE, PCE, CCL4 & nitrates10188
1/7/87Terry Foreman
C H 2 M Hill
Neil Ziemba
Environmental Protection Agency - Region 9
TL: Metropolitan Water District of Southern California conjunctive use study, including groundwater contamination map, list of well construction details, list of info available for wells & TLs to MWD & Stetson Engineers, w/attchs5964
1/7/87Terry Foreman
C H 2 M Hill
Neil Ziemba
Environmental Protection Agency - Region 9
TL: Metropolitan Water District of Southern California conjunctive use study, including groundwater contamination map, list of well construction details, list of info available for wells & TLs to MWD & Stetson - map (24 inches x 36 inches) (attch only)34276
4/6/87Kirk Thomson
C H 2 M Hill

Artemis Antipas
C H 2 M Hill

Kent Aue
C H 2 M Hill
Environmental Protection Agency - Region 9Quality assurance project plan (QAPP), San Gabriel areas 1-4, w/approvals6006
4/24/87C H 2 M HillEnvironmental Protection Agency - Region 9Field sampling plan for sampling existing wells, San Gabriel areas 1-4, w/attchs5943
4/24/87C H 2 M HillEnvironmental Protection Agency - Region 9Field sampling plan for sampling existing wells, San Gabriel areas 1-4 - plate 1, wells identified for RI/FS monitoring, plate 2, locations of wells to be sampled & plate 1 [sic], locations of hospitals (22 inches x 34 inches) (attchs only)34262
7/1/87Environmental Protection Agency - Region 9-Fact sheet: San Gabriel Basin sites - EPA begins soil gas sampling in Whittier Narrows area [Issue #2]5693
7/6/87Dave Mark
C H 2 M Hill
Environmental Protection Agency - Region 9Addendum, request for analysis for 2nd round of sampling, field sampling plan for sampling existing wells, w/EPA field operation cover sheet5969
7/22/87Tracy Yerian
Southwest Laboratory of Oklahoma
-Data validation rpt: Case #7211/2894Y #7, full organics analysis, sample #YC220 to YC226, w/TL to P Bisson fr K Kitchingman 7/22/871971
7/22/87Donna Oswald
Southwest Laboratory of Oklahoma
-Data validation rpt: Case #7211/2894Y #4, full organics analysis, sample #YC201 to YC204, w/TL to P Bisson fr K Kitchingman 7/22/871988
7/22/87Donna Oswald
Southwest Laboratory of Oklahoma
-Data validation rpt: Case #7211/2894Y #5, full organics analysis, sample #YC205, YC206, YC209 & YC210, w/TL to P Bisson fr K Kitchingman 7/22/871989
7/22/87Tracy Yerian
Southwest Laboratory of Oklahoma
-Data validation rpt: Case #7211/2894Y #6, full organics analysis, sample #YC212 to YC221, w/TL to P Bisson fr K Kitchingman 7/22/871990
7/24/87C H 2 M HillEnvironmental Protection Agency - Region 9Workplan for stage 1 San Gabriel Basin RI/FS5926
7/24/87C H 2 M HillEnvironmental Protection Agency - Region 9Workplan for stage 1 San Gabriel Basin RI/FS - plate 1, proposed testing locations for basinwide RI/FS (22 inches x 34 inches) (attch only)34254
7/27/87Donna Oswald
Chemtech Laboratory
-Data validation rpt: Case #7211/2894Y #13, SAS inorganic analysis, sample #107203, 107213, w/TL to P Bisson fr K Kitchingman 7/27/871981
7/27/87Donna Oswald
Chemtech Laboratory
-Data validation rpt: Case #7211/2894Y #3, SAS inorganics analysis, sample #101403, 101413 & 101423, w/TL to P Bisson fr K Kitchingman 7/27/871982
7/27/87Tracy Yerian
Southwest Laboratory of Oklahoma
-Data validation rpt: Case #7211/2894Y #12, SAS-VOAs by method 601 analysis, sample #YC205 207 208 211-215 218 219 225 227, w/TL to P Bisson 7/27/871983
7/27/87Donna Oswald
Alliance Technologies, Inc
-Data validation rpt: Case #7211/2894Y #11, SAS-VOAs by method 601 & TOC analysis, sample #103611 103901 103911 104301 104311 104501 104511 104701 etc1984
7/27/87Donna Oswald
Alliance Technologies, Inc
-Data validation rpt: Case #7211/2894Y #10, SAS-VOAs by method 601 & TOC analysis, sample #101701 101711 101811 101911 102011 102111 102211 102701 etc1985
7/27/87Donna Oswald
Alliance Technologies, Inc
-Data validation rpt: Case #7211/2894Y #14, SAS-VOAs by method 601 & TOC analysis, sample #105611 105801 105811 105901 105911 106011 106111 106211 etc1986
7/27/87Donna Oswald
Alliance Technologies, Inc
-Data validation rpt: Case #7211/2894Y #16, SAS-VOAs by method 601 & TOC analysis, sample #107111 107411 107511 107521 107601 107611 107701 107711 etc1987
7/27/87Tracy Yerian
Alliance Technologies, Inc
-Data validation rpt: Case #7211-2894Y #1, SAS-VOAs by method 601 analysis, sample #100101, 100111, 100201, 100211, 100311 & 100411, w/TL 7/27/871994
7/27/87Donna Oswald
Alliance Technologies, Inc
-Data validation rpt: Case #7211-2894Y #1A, SAS-VOAs by method 601 analysis, sample #101501, 101511, w/TL to P Bisson fr K Kitchingman 7/27/871995
7/27/87Tracy Yerian
Alliance Technologies, Inc
-Data validation rpt: Case #7211/2894Y #9, SAS-VOAs by method 601 analysis, sample #105411, 105511, 105701, 105711, 107001, 107011 107021, w/TL 7/27/871996
7/27/87Tracy Yerian
Alliance Technologies, Inc
-Data validation rpt: Case #7211/2894Y #9A, SAS-VOAs by method 601 analysis, sample #100701 100711 100811 100911 101101 101111 101211 101311 101401 etc1997
7/27/87Tracy Yerian
Alliance Technologies, Inc
-Data validation rpt: Case #7211/2894Y #2, SAS-VOAs by method 601 analysis, sample #102901, 102911, 103501 & 130511, w/TL fr K Kitchingman 7/27/871998
7/29/87C H 2 M Hill-San Gabriel well sampling, sample # cross reference list, 1st round (cross-references "Data validation rpt" documents 1971, 1981 thru 1998)11324
7/31/87Tracy Yerian
Alliance Technologies, Inc
-Data validation rpt: Case #7211/2894Y #8, SAS=VOAs by method 601 analysis, sample #104011, 104101, 104111, 104121, 104211, 104501 104511 104901 1049111993
8/5/87Tracy Yerian
Alliance Technologies, Inc
-Data validation rpt: Case #7211/2894Y #9, TOCs analysis, sample #101101, 101111, 101111(D), 101211, 101211(D), 101311, 101401, 101411, 101421, 1016111992
9/1/87Environmental Protection Agency - Region 9-Fact sheet: Public participation in investigation & cleanup [Issue #3]5429
10/5/87Tracy Yerian -Data validation rpt: Case #7824/3208Y #2, organics analysis (VOAs only), sample #G-223 to G-228, w/TL 10/5/87 & cross reference list, round 2, 8/26/87 (cross-references "Data validation rpt" documents 1991 & 2006)2005
10/5/87Tracy Yerian -Data validation rpt: Case #7824/3208Y, organics analysis (VOAs only), sample #G-210 to G-222, w/TL to P Bisson fr K Kitchingman 10/5/872006
10/14/87C H 2 M HillEnvironmental Protection Agency - Region 9Request for analysis for 3rd round of sampling, addendum, field sampling plan for existing wells, San Gabriel areas 1-45978
10/14/87C H 2 M HillEnvironmental Protection Agency - Region 9Request for analysis for 3rd round of sampling, addendum, field sampling plan for existing wells, San Gabriel areas 1-4 - plate 1, sampling locations, FSP for sampling existing wells, stage 1 San Gabriel basin RI/FS (36 inches x 60 inches) (attch only)34287
10/23/87Tracy Yerian -Data validation rpt: Case #7824/3208Y, organics analysis (VOAs only), sample #G-202 to G-207 & G-209, w/TL to P Bisson fr K Kitchingman, 10/23/871991
10/26/87Tom Huetteman
Environmental Protection Agency - Region 9

Alisa Greene
Environmental Protection Agency - Region 9
Neil Ziemba
Environmental Protection Agency - Region 9
Memo: Approval of sampling plan addendum for 3rd round of sampling, field sampling plan for existing wells6289
10/30/87Neil Ziemba
Environmental Protection Agency - Region 9
Well Owner/OperatorLtr: Results of analyses of water samples fr wells, w/summary of info provided in tables 1 & 2 & list of purveyors addresses, rounds 1 & 2, w/o tables5573
12/1/87Environmental Protection Agency - Region 9-Fact sheet: EPA selects groundwater treatment plan for El Monte area hazardous waste site (issue #4, in English & Spanish)12888
12/15/87Patricia Port
US Dept of the Interior - Office of Environmental Project Review
Director
US Dept of the Interior - Office of Environmental Project Review
Memo: Notification that preliminary natural resources survey for San Gabriel Valley area 2 site, Baldwin Park, reveals that releases fr site have not affected any lands, minerals, or Indian resources managed or protected by Dept of Interior (draft)10762
12/22/87Donna Oswald
C H 2 M Hill
-Data validation rpt: Case #8440/3435Y #1, organics VOA analysis, sample #3435Y-319, 322, 325 & 331, w/TL to P Bisson fr K Kitchingman 1/15/881852
12/23/87Donna Oswald
C H 2 M Hill
-Data validation rpt: Case #8419/3435Y #2, organics VOA analysis, sample #3435Y-333, -345, -346, -350, etc, w/TL to P Bisson fr K Kitchingman 1/15/881851
12/28/87William Bruton, Jr
Southwest Laboratory of Oklahoma
-Data validation rpt: Case #8419/3435Y #4, organics VOA & SVOA analysis, sample #YC230-YC243, w/TL to G Baker fr K Kitchingman 1/26/881854
12/30/87Donna Oswald
C H 2 M Hill
-Data validation rpt: Case #8419/3435Y #3, organics VOA analysis, sample #3435Y-332, 337, 340 & 342, w/TL to P Bisson fr K Kitchingman 1/15/881853
1/4/88William Bruton, Jr
Alliance Technologies, Inc
-Data validation rpt: Case #8440/3435Y #5, organics VOA analysis, sample #3435Y-377, 378, 381, 386, 388 & 391, w/TL to G Baker fr K Kitchingman 1/26/881855
1/6/88Linn Magoffin
Main San Gabriel Basin Watermaster
-Resolution #1-88-56, resolution of Main San Gabriel Basin Watermaster amending Watermaster's rules & regulations to exempt or modify production assessments for basin cleanup production by adding section 18(e)8293
1/8/88Donna Oswald
C H 2 M Hill
-Data validation rpt: Case #8440/3435Y #6, organics VOA analysis, sample #3435Y-3107, 3109, 3110 & 3111, w/TL to G Baker fr K Kitchingman 1/26/881856
1/22/88Mark Henry
C H 2 M Hill

John Keller
C H 2 M Hill
Neil Ziemba
Environmental Protection Agency - Region 9
Request for analysis for 4th round of sampling, field sampling plan for sampling existing wells - addendum, w/cover page fr CH2M Hill to EPA, 6/3/915757
2/1/88Donna Oswald
C H 2 M Hill
-Data validation rpt: Case #8419/3435Y #7, organics VOA analysis, sample #3435Y-334, 335, 338, 339, 343, etc, w/TL to P Bisson fr K Kitchingman 2/11/881857
2/1/88William Bruton, Jr
Alliance Technologies, Inc
-Data validation rpt: Case #8419/3435Y #10, organics VOA analysis, sample #3435Y-3112, -3113, -3116 & -3118, w/TL to P Bisson fr K Kitchingman 2/19/881860
2/3/88Donna Oswald
C H 2 M Hill
-Data validation rpt: Case #8419/3435Y #8, organics VOA analysis, sample #3435Y-379 to -385, -387, -389, etc, w/TL to P Bisson fr K Kitchingman 2/11/881858
2/4/88William Bruton, Jr
Alliance Technologies, Inc
-Data validation rpt: Case #8419/3435Y #9, organics VOA analysis, sample #3435Y-396 to -399, -3100 to -3106, w/TL to P Bisson fr K Kitchingman 2/19/881859
2/6/88Donna Oswald
C H 2 M Hill
-Data validation rpt: Case #8419/3435Y #12, organics BNA analysis, sample #YC244-YC246, w/TL to P Bisson fr K Kitchingman 2/19/881842
2/9/88William Bruton, Jr
Alliance Technologies, Inc
-Data validation rpt: Case #8419/3435Y #11, organics VOA analysis, sample #3435Y-305 to -313, -318, 320, etc, w/TL to P Bisson fr K Kitchingman 2/19/881841
2/18/88Mike Ward
Los Angeles Times
-Newsclip: Huge costs, decades of work seen in job of purifying water, w/marginalia fr Terry to Paula (Bisson) re need to talk about story10674
2/29/88C H 2 M Hill-San Gabriel well sampling, sample number cross reference list, round 3 (cross-references "Data validation rpt" documents 1841 thru 1843, 1851 thru 1860)11323
3/8/88Greg Nicoll
I C F Technology, Inc
-Data validation rpt: Case #3435Y #13, organics analysis, sample #3435Y-346, -351, -376 & -3116, w/TL to P Bisson fr K Kitchingman 3/8/881843
5/1/88P Chattopadhyay
Ecology & Environment, Inc
Environmental Protection Agency - Region 9Documentation requirements for data validation of non-CLP laboratory data for organic & inorganic analyses5415
5/12/88Mike Ward
Los Angeles Times
-Newsclip: Pollution moves on - 'cleaner' well not really good news, experts on groundwater problem say, w/photo of S Yarbrough & map showing open & closed wells in Baldwin Park area10225
5/13/88Karen Bankert
Maxwell Laboratories, Inc - S-CUBED Laboratory
-Data validation rpt: Case #3654Y #1, 20 water samples, analysis SAS volatiles, sample #W126-145 (completed between 4/87 & 2/88), w/TL 5/13/88 & cross reference list, round 42004
6/1/88James M Montgomery Consulting Engineers, IncUS Army Corps of EngineersEngineering rpt, confirmatory study for contamination evaluation - former Owl 4X plant, Azusa [Cont #DACA87-86-D-0048]5019
6/1/88Environmental Protection Agency - Region 9-Fact sheet: EPA proposes cleanup plan for contaminated groundwater at Suburban Water Systems' Bartolo Well Field in Whittier Narrows area (Issue #5)6873
6/20/88Neil Ziemba
Environmental Protection Agency - Region 9
Well Owner/OperatorLtr: Transmittal of analytical results for EPA-sampled wells, w/attchs5889
8/1/88C H 2 M HillEnvironmental Protection Agency - Region 9Draft technical memo: San Gabriel basin groundwater sampling, w/plates 1-42563
9/25/88Mike Ward
Los Angeles Times
-Newsclip: EPA may help fund search for sources of tainted water10228
9/29/88Peter Rogers
CA Dept of Health Services - Public Water Supply Branch
P W S B Management StaffMemo: Transmittal of policy guidance for direct domestic use of groundwater contaminated with toxic substances 9/22/88, w/attch11968
11/29/88Los Angeles County - Dept of Public Works-Table: Amounts of water recharged at Irwindale spreading grounds, 1987-199211960
1/9/89Lee Garber
San Gabriel Valley Tribune, Inc
-Newsclip: Group (East San Gabriel Valley League of Women Voters) seeks public role in water cleanup10644
2/1/89Environmental Protection Agency - Region 9-Fact sheet: EPA selects remedy to treat groundwater at Bartolo Well Field (fact sheet #6)12889
2/16/89Lee Garber
San Gabriel Valley Tribune, Inc
-Newsclip: Community group plans 4 open meetings on water contamination, w/photo of Mary Johnson, League of Women Voters10358
4/1/89Environmental Protection Agency - Region 9-Preparation of EPA Region 9 sample plan for EPA-lead Superfund projects, w/memo 6/1/89 fr T Huetteman, Quality Assurance Management Section to Superfund RPMs & RPOs5494
4/10/89US Dept of Health & Human Services - Agency for Toxic Substances & Disease Registry-Preliminary health assessment for San Gabriel Valley, areas 1-45703
5/12/89C H 2 M HillEnvironmental Protection Agency - Region 9Draft field sampling plan for well logging & depth-specific sampling of wells, area 5 remedial investigation2661
5/25/89Tom Huetteman
Environmental Protection Agency - Region 9
Neil Ziemba
Environmental Protection Agency - Region 9
Memo: Review of field sampling plan for well logging & depth-specific sampling of wells, San Gabriel area 510417
6/1/89C H 2 M HillEnvironmental Protection Agency - Region 9Revised community relations plan, San Gabriel Valley sites2642
6/5/89A Schilling
Environmental Protection Agency - Region 9
Deanna Wieman
Environmental Protection Agency - Region 9
Memo: Testimony of Jeff Zelikson, Director of Hazardous Waste Management Div before US House of Representatives Subcommittee on Environment & Labor5726
6/22/89Russell Ford
Malcolm Pirnie, Inc

Scott Phillips
Malcolm Pirnie, Inc

Robert Raczko
Malcolm Pirnie, Inc

Harish Arora
Malcolm Pirnie, Inc
-Article: Developing carbon usage rate estimates for synthetic organic chemicals (presented at American Water Works Assn conference, 6/18/89-6/22/89)1431
7/1/89Environmental Protection Agency - Region 9-Cross reference list for laboratory rpts for EPA depth-specific sampling of wells 91901439, 08000060 & 01900031 completed in 6/89 & 7/89 (cross-references "Data validation" & "Quallity assurance" documents 2146, 2147, 2163, 2166, 2601, 2602, 10385)11893
7/3/89Timothy Jochem
Main San Gabriel Basin Watermaster
Neil Ziemba
Environmental Protection Agency - Region 9
Ltr: Notification that 2 Valley County Water District wells show detectable levels of PCE & TCE & request for meeting to discuss development that shows importance of Azusa/Baldwin Park OU RI/FS10203
7/17/89Irene Chang
Los Angeles Times
-Newsclip: Rewards are offered for identities of firms linked to water pollution, w/Spanish language newsclip fr La Opinion re EVO10261
7/24/89John Korey
East Valleys Organization
Jeff Zelikson
Environmental Protection Agency - Region 9
Ltr: Expression of appreciation for appearance at annual assembly on 7/16/89 & offering of assurance that EPA cleanup plan will be completed by year's end & support for concept of toxic cleanup reward fund10259
7/24/89Rachel Artap
I C F Technology, Inc
-Unvalidated data & data validation request - case #LV918/4707Y, memo #1, water samples for SAS inorganic analyses, w/TL fr D Bingham, 7/27/8910385
8/1/89Environmental Protection Agency - Region 9-Fact sheet: EPA to propose basinwide technical plan [#7]5379
8/23/89Jack Berges -Quality assurance rpt - case #SAS 12056/4680Y memo #1, matrix/analyses organics, w/TL fr K Kitchingman to N Ziemba, 9/6/89 & TL fr Lockheed, 8/25/892602
8/24/89Lee Garber
San Gabriel Valley Tribune, Inc
-Newsclip: EPA clean water plan revealed - finding, forcing private firms to clean defended10366
8/29/89Alyce Wasden
Lockheed Corp
-Quality assurance rpt - CASE #SAS 12056/4680Y, memo #2, matrix/analyses water/VOA, w/TL fr Kitchingman to N Ziemba, 9/11/89 & TL fr Lockheed, 8/29/892601
9/1/89Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG239, 240, 2411548
9/10/89Mike Ward
Los Angeles Times
-Newsclip: EPA to contact possible water contaminators10648
9/26/89Lee Garber
San Gabriel Valley Tribune, Inc
-Newsclip: Program would target Valley water polluters, w/photo of Ira Reiner, John Korey, Esteban Torres & Daniel McGovern at meeting10652
10/2/89C Jones
C H 2 M Hill
-Data validation rpt: Case #12332/4608Y, memo #5, organic (SVOCs) analysis, w/TL to N Ziemba fr D Bingham2146
10/2/89C Jones
C H 2 M Hill
-Data validation rpt: Case #12056/4608Y, memo #3B, organic (SVOAs) analysis, w/TL to N Ziemba fr D Bingham2147
10/2/89C Jones
C H 2 M Hill
-Data validation rpt: Case #12056/4608Y, memo #3 & 4, organic (VOAs) analysis, w/TL to N Ziemba fr D Bingham2166
12/6/89Margie Merced
I C F Technology, Inc
-Data validation rpt: Case #SAS 4906Y, memo #6, inorganic analyses, w/TL to N Ziemba fr S Lee 12/13/892163
1/1/90Los Angeles County - Dept of Public Works-Table of rates & volumes of water recharged in San Gabriel Basin spreading grounds, 1978/79 to 1989/901441
1/1/90E N S R Consulting & EngineeringCA Regional Water Quality Control Board - Los Angeles RegionWorkplan for groundwater assessment - Valspar facility, 1004 W 10th St, Azusa3774
3/1/90Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG339, 340, 350, 352-3551537
3/5/90William Stewart
Valspar Corp, The
Phillip Ramsey
CA Regional Water Quality Control Board - Los Angeles Region
Ltr: Addendum to 1/90 workplan for subsurface investig at Valspar facility, Azusa & response to comments in ltr 2/2/90 fr P Ramsey [File #108.1034]9050
3/15/90Steve Scauzillo
San Gabriel Valley Tribune, Inc
-Newsclip: Groundwater pollution probe shifts target, focus now on Azusa, Baldwin Park, w/ltr to editor fr Glendora resident B Mee, 'Critical lawsuit', re Resource Board lawsuit10350
4/1/90Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG242, 244, 2451529
4/1/90Environmental Protection Agency - Region 9-Fact sheet: EPA releases San Gabriel basinwide technical plan [#8]3250
4/10/90Linn Magoffin
Main San Gabriel Basin Watermaster
Don Maughan
CA Water Resources Control Board
Ltr: Comments on preliminary draft San Gabriel groundwater basin White Paper (draft, unsigned)10316
4/10/90Kris Helm
Metropolitan Water District of Southern California
David Cohen
CA Water Resources Control Board
Ltr: Comments on White Paper which addresses San Gabriel groundwater quality management plan institutional & financial issues10321
4/16/90Environmental Protection Agency - Region 9-Press release: Environmental News - release of basinwide technical plan & White Paper describing comprehensive long-term approach to control spread of groundwater contamination & cleanup of San Gabriel Valley on 4/17/90 in Baldwin Park10318
4/17/90C H 2 M HillEnvironmental Protection Agency - Region 9Basinwide technical plan rpt, v1 of 2 (public review draft)4053
4/17/90C H 2 M HillEnvironmental Protection Agency - Region 9Basinwide technical plan rpt, v2 of 2 (public review draft)4054
4/18/90Law Environmental, IncAzusa Land Reclamation Co, Inc1989 annual rpt, groundwater monitoring - Azusa Land Reclamation Landfill, Azusa1553
4/18/90Steve Scauzillo
San Gabriel Valley Tribune, Inc
-Newsclip: Groundwater cleanup plan targets Azusa, Baldwin Park, w/map of Baldwin Park area10352
4/26/90Roy Sakaida
CA Regional Water Quality Control Board - Los Angeles Region
William Stewart
Valspar Corp, The
Ltr: Approval of revised workplan - Valspar Corp, 1004 W 10th St, Azusa [File #108.1034]11060
4/30/90Michael Whitehead
San Gabriel Valley Water Co
Main San Gabriel Basin WatermasterLtr: Comments & recommendations on proposals to fundamentally alter Main San Gabriel Basin Judgment that governs withdrawal of groundwater fr basin10323
4/30/90A Krueger
Upper San Gabriel Valley Water Assn
Main San Gabriel Basin WatermasterLtr: Recommendation for Watermaster to defer any amendments to Judgment as suggested in resolution until clear & well-defined plan developed & adopted10326
5/1/90Kenneth Scarbrough
Environmental Protection Agency - Environmental Monitoring Systems Laboratory
Neil Ziemba
Environmental Protection Agency - Region 9
Memo: EMSL-LV Support Center comments on Whittier Narrows comparison project, w/memo fr C Carlsen, et al, to N Ziemba re overview2548
5/1/90Steve Scauzillo
San Gabriel Valley Tribune, Inc
-Newsclip: Azusa firms linked to pollution - Aerojet, OSCO (Oil & Solvent Process Co) cited by EPA10636
5/1/90CA Water Resources Control Board-Resolution #68-16, statement of policy with respect to maintaining high quality of waters in California, w/appendix 1, chapter 411978
5/1/90Environmental Protection Agency - Region 9

CA Water Resources Control Board

CA Regional Water Quality Control Board - Los Angeles Region
-Public notice: Invitation to community workshops, 5/15/90 & 6/28/90, on draft basinwide technical plan & White Paper on groundwater contamination in San Gabriel Valley12890
5/1/90Environmental Protection Agency - Region 9-Fact sheet: Groundwater treatment begins for El Monte residents (#9), w/photo of Richwood Mutual Water Co's carbon adsorption treatment plant12891
5/2/90Randell Vogel
Suburban Water Systems
Main San Gabriel Basin WatermasterLtr: Suburban Water Systems strongly urges Watermaster to complete study & preparation of Basin Cleanup Plan prior to adopting amendment to Judgment10327
5/22/90C H 2 M HillEnvironmental Protection Agency - Region 9Draft technical memo: Well logging & depth-specific sampling of wells, San Gabriel area 5 remedial investigation2656
6/8/90Thomas Deane
Kennedy, Jenks, Chilton
Phillip Ramsey
CA Regional Water Quality Control Board - Los Angeles Region
Techical workplan for installation, development & water sampling of gw monitoring well, California Amforge, Azusa, w/TL 8/23/90 & attch [File #108.0569]4045
7/1/90Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG246, 246A, 2471530
7/1/90Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG248, 249, 250, 2511531
7/1/90Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG251, 252, 2531532
7/9/90Frank Stillman
Triad Foundation Engineering, Inc
Phaostron Instrument & Electronic Co, IncLtr: Addendum to discovery well workplan 5/22/90, ref ltr 6/21/90 fr Regional Board - 717 N Coney Ave, Azusa, w/ODEX drilling procedure8591
7/12/90Pico Rivera News-Newsclip: EPA seeks tips to nail contaminators (rewards of up to $10,000)10612
7/23/90Gerald Hiatt
Environmental Protection Agency - Region 9
Tony Mancini
CA Regional Water Quality Control Board - San Francisco Bay Region
Ltr: Response to inquiry re treatment of 1,1-dichloroethylene (1,1-DCE, CAS 75-35-4) for purpose of risk assessment & setting cleanup goals11969
8/1/90E N S R Consulting & Engineering-Groundwater assessment rpt - Valspar Corp, 1004 W 10th St, Azusa [File #108.1034]2157
8/2/90Steve Scauzillo
San Gabriel Valley Tribune, Inc
-Newsclip: Cooperative sought for water cleanup - Metropolitan Water District (MWD) supports joint authority for 4 agencies10609
8/6/90C H 2 M HillEnvironmental Protection Agency - Region 9San Gabriel area 5 RI - draft quality assurance project plan for well logging & depth-specific sampling2468
8/6/90C H 2 M HillEnvironmental Protection Agency - Region 9Draft quality assurance project plan for sampling existing wells - San Gabriel area 5 remedial investigation5667
8/24/90Wayne Praskins
Environmental Protection Agency - Region 9
David De Jesus
Covina Irrigating Co
Ltr: Well logging & depth-specific sampling of Baldwin Park #3 well11835
8/24/90Wayne Praskins
Environmental Protection Agency - Region 9
Gene Schafer
Suburban Water Systems
Ltr: Well logging & depth-specific sampling of Suburban Water System's well 140/WA11836
8/24/90Wayne Praskins
Environmental Protection Agency - Region 9
Vern Gilbert
City of Glendora - Water Dept
Ltr: Sampling of City of Glendora wells 7G & 4E11837
8/24/90Wayne Praskins
Environmental Protection Agency - Region 9
Stan Yarbrough
Valley County Water District
Ltr: Well logging & depth-specific sampling of Valley County Water District's Big Dalton & Morada wells & wellhead sampling of 8 Arrow Hwy well11838
8/24/90Wayne Praskins
Environmental Protection Agency - Region 9
Gerald Black
San Gabriel Valley Water Co
Ltr: Well logging & depth-specific sampling of San Gabriel Valley Water Co's B6C well & wellhead sampling of well B6B11839
8/24/90Wayne Praskins
Environmental Protection Agency - Region 9
Steve Polopolus, resident
City of Corona
Ltr: Notification of wellhead sampling planned this fall in Baldwin Park area11840
8/28/90C H 2 M HillEnvironmental Protection Agency - Region 9Sampling & analysis plan for sampling existing wells - San Gabriel area 5 remedial investigation2562
8/31/90Roy Sakaida
CA Regional Water Quality Control Board - Los Angeles Region
William Taylor
California Amforge Corp
Ltr: Revised supplementary subsurface soil investigation workplan by Kennedy/Jenks/Chilton is approved, w/TL 8/23/90 [File #108.0569]9299
9/5/90C H 2 M HillEnvironmental Protection Agency - Region 9Sampling & analysis plan for well logging & depth-specific sampling of wells, San Gabriel area 5 RI5644
9/6/90Tom Huetteman
Environmental Protection Agency - Region 9
Wayne Praskins
Environmental Protection Agency - Region 9
Memo: Review of sampling & analysis plan for sampling existing wells, San Gabriel area 5, w/attch11322
9/10/90Robert Collar
C H 2 M Hill
Tom Huetteman
Environmental Protection Agency - Region 9
Memo: Addendum to sampling & analysis plan (SAP) for existing wells, San Gabriel area 5 RI dated 8/28/9011321
9/28/90Tom Huetteman
Environmental Protection Agency - Region 9
Wayne Praskins
Environmental Protection Agency - Region 9
Memo: Review & approval of sampling & analysis plan for well logging & depth-specific sampling of wells, San Gabriel area 5, 9/5/9011320
10/26/90C H 2 M HillEnvironmental Protection Agency - Region 9San Gabriel areas 5 & 6, draft quality assurance project plan (QAPP) for monitoring well installation & sampling1815
10/29/90Wayne Praskins
Environmental Protection Agency - Region 9
William Allan
US Dept of the Interior - Office of Environmental Project Review
Ltr: Notification of potential damages to natural resources & EPA's intent to initiate negotiations with PRPs & status of 5 operable units, w/o attch10491

10/29/90Wayne Praskins
Environmental Protection Agency - Region 9
CA Resources Agency - Natural Resources TrusteeLtr: Notification of potential damages to natural resources & EPA's intent to initiate negotiations with PRPs & status of 5 San Gabriel Valley OUs, w/o attch10492
11/1/90E N S R Consulting & Engineering-Groundwater monitoring rpt - Valspar Corp, 1004 W 10th St, Azusa [File #108.1034]2175
11/9/90Kent Kitchingman
Environmental Protection Agency - Region 9
Wayne Praskins
Environmental Protection Agency - Region 9
Memo: Approval of San Gabriel basin areas 5 & 6 quality assurance project plan for monitoring well installation 10/26/909093
11/9/90Kent Kitchingman
Environmental Protection Agency - Region 9
Wayne Praskins
Environmental Protection Agency - Region 9
Memo: Approval of San Gabriel basin area 5 quality assurance project plans11319
11/19/90Richard Wilson
Kennedy, Jenks, Chilton

Thomas Deane
Kennedy, Jenks, Chilton
William Taylor
California Amforge Corp
Groundwater monitoring well construction & sampling - California Amforge Corp, 750 N Vernon Ave, Azusa, w/TL dated 11/19/90 [File #108.0569]2830
11/26/90David Jones
Environmental Protection Agency - Region 9
Robert Ghirelli
CA Regional Water Quality Control Board - Los Angeles Region
Ltr: Description of plans for disposing of water produced by new sampling of 15 wells in Baldwin Park & neighboring areas11864
11/27/90C H 2 M HillEnvironmental Protection Agency - Region 9Sampling & analysis plan for monitoring well installation & sampling, San Gabriel areas 5 & 6, w/TL 11/27/90 to L Otis3614
11/28/90Robert Collar
C H 2 M Hill
Wayne Praskins
Environmental Protection Agency - Region 9
Memo: Addendum (#2) to sampling & analysis plan (SAP) for existing wells, San Gabriel area 5 remedial investigation 8/28/9011609
12/1/90Environmental Protection Agency - Region 9-Public notice: Sampling of existing groundwater wells in Baldwin Park & Azusa starting 12/13/9012892
12/1/90Environmental Protection Agency - Region 9-Public notice: Testing of existing groundwater wells in Baldwin Park starting 12/26/9012893
12/5/90David Towell
C H 2 M Hill
Neil Ziemba
Environmental Protection Agency - Region 9
Memo: Response to EMSL Whittier Narrows Westbay comparison study comments (unsigned)2568
12/10/90CA Superior Court - Los Angeles County-Upper San Gabriel Valley Municipal Water District vs City of Alhambra, et al - intended decision re amendment to judgment [#924128]11961
12/11/90Randa Cardwell
San Gabriel Valley Tribune, Inc
-Newsclip: Judge gives water agency some control over pumping in cleanup10387
12/13/90Richard Wilson
Kennedy, Jenks, Chilton

Thomas Deane
Kennedy, Jenks, Chilton
William Taylor
California Amforge Corp
Ltr: 11/90 groundwater sampling & laboratory analysis results - California Amforge Corp, 750 N Vernon Ave, Azusa, w/attchs [File #108.0569]2826
1/1/91I C F Technology, Inc-Data validation rpts: Sampling wells 1902971, 1900882, 1902920, 1900034, 8000070, Z1000006, V10AMMW1, 1901524, 71900721, 1900035, 1900831, 1902169, samples collected 9/90-1/911595
1/1/91Main San Gabriel Basin Watermaster-Fact sheet: Watermaster prepares technical plan to address groundwater cleanup in Main San Gabriel Basin10425
1/3/91Roy Sakaida
CA Regional Water Quality Control Board - Los Angeles Region
Richard Cobb
Norac Co, Inc, The
Ltr: Approval of 11/9/90 revised supplementary subsurface investigation workplan & 12/17/90 workplan addendum - Norac Co, Azusa [File #108.0566]11909
1/16/91Richard Wilson
Kennedy, Jenks, Chilton

Thomas Deane
Kennedy, Jenks, Chilton
William Taylor
California Amforge Corp
Ltr: 12/90 groundwater sampling & laboratory analysis results - California Amforge, 750 N Vernon Ave, Azusa, w/attch [File #108.0569]2787
1/28/91Law Environmental, IncAzusa Land Reclamation Co, Inc1990 annual rpt, waste disposal & groundwater monitoring - Azusa Land Reclamation Landfill, Azusa1554
1/28/91C H 2 M HillEnvironmental Protection Agency - Region 9Draft technical memo: Area 5 RI, disposal alternatives for water generated during well logging, depth-specific sampling & wellhead sampling1567
1/29/91Florence Pickard
CA Superior Court - Los Angeles County
-Order #924129, amending judgment to expand Watermaster's powers to include maintenance, improvement & control of water quality, etc, hearing 8/7/902505
2/15/91Thomas Deane
Kennedy, Jenks, Chilton

Richard Wilson
Kennedy, Jenks, Chilton
William Taylor
California Amforge Corp
Ltr: Results of laboratory analyses on groundwater samples collected 1/24/91 fr well MW1 - California Amforge Corp site, 750 N Vernon Ave, Azusa, w/attchs [File #108.0569]3055
3/1/91Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG255, 281, 282, 2831533
3/5/91Frank Stillman
Triad Foundation Engineering, Inc
Hurst Funfstuck
Phaostron Instrument & Electronic Co, Inc
Ltr: Addendum to discovery well workplan dated 5/22/90 & 7/9/90 - Phaostron Instrument & Electronic Co, 717 N Coney Ave, Azusa, w/attchs [File #108.0678]2882
3/5/91Wayne Praskins
Environmental Protection Agency - Region 9
Carlos Alvarado
City of Irwindale - Office of City Engineer
Ltr: Request for approval re installion & sampling of groundwater monitoring well on City of Irwindale property at 14910 Los Angeles St, Irwindale9737
3/5/91Wayne Praskins
Environmental Protection Agency - Region 9
Carlos Alvarado
City of Irwindale - Office of City Engineer
Ltr: Request for approval to install groundwater monitoring well on city property at 14910 Los Angeles St, Irwindale & site access for EPA staff11660
3/6/91Robert Collar
C H 2 M Hill
Stan Yarbrough
C H 2 M Hill
Memo: Partial sampling results from Valley County Water District's Arrow Hwy (01900034) & Big Dalton (01900035) wells11809
3/6/91Robert Collar
C H 2 M Hill
Ray McCardell
C H 2 M Hill
Memo: Partial sampling results from Sonoco Products well (01902971)11810
3/6/91Robert Collar
C H 2 M Hill
Richard Wulfing
C H 2 M Hill
Memo: Partial sampling results fr LA County Parks & Recreation's Santa Fe #1 well (08000070)11811
3/6/91Robert Collar
C H 2 M Hill
George Farag
C H 2 M Hill
Memo: Partial sampling results fr LA County Flood Control well 3030F (Z1000006)11812
3/6/91Robert Collar
C H 2 M Hill
David De Jesus
Covina Irrigating Co
Memo: Partial sampling results fr Covina Irrigating Co's Baldwin Park #3 well (01900882)11813
3/6/91Robert Collar
C H 2 M Hill
Gerry Butler
C H 2 M Hill
Memo: Partial sampling results from well MW-1 at Criterion Catalysts facility11814
3/11/91Wayne Praskins
Environmental Protection Agency - Region 9
Mary Jaureguy
La Puente Valley County Water District
Ltr: EPA plans for Baldwin Park operable unit & request for information11821
3/11/91Wayne Praskins
Environmental Protection Agency - Region 9
Christel Campa
Valley View Mutual Water Co
Ltr: Request for assistance on EPA's newest project in Baldwin Park OU11860
3/15/91Wayne Praskins
Environmental Protection Agency - Region 9
Carlos Alvarado
City of Irwindale - Office of City Engineer
Ltr: Installation, operation & maintenance of groundwater monitoring well on City of Irwindale property located at 14910 Los Angeles St, Irwindale9735
3/15/91Wayne Praskins
Environmental Protection Agency - Region 9
Carlos Alvarado
City of Irwindale - Office of City Engineer
Ltr: Response to concerns expressed by City of Irwindale to EPA contractor CH2M Hill re time required on-site, insurance, etc, related to monitoring well installation on City of Irwindale property at 14910 Los Angeles St, Irwindale11661
3/18/91Robert Collar
C H 2 M Hill
Kris Helm
Metropolitan Water District of Southern California
Memo: Results from sampling of wells in Baldwin Park/Azusa area, San Gabriel basin, w/o attch11815
3/18/91Robert Collar
C H 2 M Hill
Kevin Smead
Stetson Engineers, Inc
Memo: Results from sampling of wells in Baldwin Park/Azusa area, San Gabriel basin, w/o attch11816
3/19/91Wayne Praskins
Environmental Protection Agency - Region 9
Kris Helm
Metropolitan Water District of Southern California
Ltr: Transmittal of summary of Superfund remedial process & issues that may arise during Baldwin Park project, w/attch11820
3/21/91Carlos Alvarado
City of Irwindale - Office of City Engineer
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Approval of installation of groundwater monitoring well on city property at 14910 Los Angeles St, Irwindale, w/assessor's map11662
3/21/91Wayne Praskins
Environmental Protection Agency - Region 9
David De Jesus
Covina Irrigating Co
Ltr: EPA plans for Baldwin Park operable unit & schedule for identifying potential remedies11822
3/25/91Wayne Praskins
Environmental Protection Agency - Region 9
Carol Williams
Main San Gabriel Basin Watermaster
Ltr: Transmittal of results of volatile organic compounds & nitrate analyses for 12 Azusa/Baldwin Park area wells recently sampled by EPA, w/attch11828
4/1/91I C F Technology, Inc-Data validation rpts fr spinner logging & depth-specific sampling of wells 71903093, 1900035, 1900882, 01900029, 08000093, samples collected 1/91-4/911594
4/1/91S C S EngineersDri-Powr Co, IncPreliminary soil investigation & tank closure rpt - Dri-Powr Co, 735 N Georgia Ave, Azusa [File #108.0796]3183
4/1/91Steve Scauzillo
San Gabriel Valley Tribune, Inc
-Newsclip: (Representative Matthew) Martinez blasts EPA actions on toxic cleanup10716
4/1/91Environmental Protection Agency - Region 9-Fact sheet: San Gabriel Valley Superfund Sites, progress rpt (fact sheet #10)12894
4/2/91Roy Sakaida
CA Regional Water Quality Control Board - Los Angeles Region
Paul McGuirk
Phaostron Instrument & Electronic Co, Inc
Ltr: Approval of revised supplementary subsurface investigation workplan transmitted with ltr 3/7/91 - Phaostron Instruments, 717 N Coney Ave, Azusa [File #108.0678]11912
4/4/91Steve Scauzillo
San Gabriel Valley Tribune, Inc
-Newsclip: Valley water cleanup plant talks begin (Upper San Gabriel Valley Municipal Water District enters into talks with Metropolitan Water District to build groundwater treatment plant in Baldwin Park)10389
4/24/91Wayne Praskins
Environmental Protection Agency - Region 9
Kevin Smead
Stetson Engineers, Inc
Ltr: Transmittal of lab sheets for volatile organic & nitrate analyses for 12 Baldwin Park area wells sampled by EPA 9/90-1/91 (unsigned), w/o attchs11827
4/30/91Environmental Protection Agency - Region 9-Ltr: General notice form ltr, w/attch 1, recipients of general notice of liability & attch 2, request for info pursuant to section 104 of CERCLA, instructions, definitions & questions5948
5/1/91E N S R Consulting & Engineering-Groundwater monitoring rpt - Valspar Corp, 1004 W 10th St, Azusa [File #108.1034]2176
5/1/91Calscience Environmental Laboratories, IncC H 2 M HillLaboratory results for drill cuttings & development fluids for EPA monitoring well 5-1, 4/91-5/912331
5/1/91England, Shahin & AssocNorac Co, Inc, ThePhase 2 subsurface investigation & phase 3 workplan - Norac Co, 405 S Motor Ave, Azusa, w/TL dated 5/1/91 [File #108.0566]3171
5/15/91David Towell
C H 2 M Hill

Robert Collar
C H 2 M Hill
Robbie Hedeen
Environmental Protection Agency - Region 9
Memo: Notice of intent to collect groundwater samples - 2nd round of wellhead sampling in areas 5, w/o tables 5-1, 5-2, figure 2 & appendix A11613
5/17/91David Towell
C H 2 M Hill

Robert Collar
C H 2 M Hill
Robbie Hedeen
Environmental Protection Agency - Region 9
Memo: Notice of intent to collect groundwater samples from monitoring wells in areas 5 & 6, w/o request for analyses table 5-4 & appendix A11612
6/1/91E N S R Consulting & Engineering-Groundwater monitoring rpt - Valspar Corp, 1004 W 10th St, Azusa [File #108.1034]2156
6/1/91Environmental Protection Agency - Region 9-Fact sheet: Changes proposed for groundwater remedy at Suburban operable unit [Issue #11]9640
6/5/91Main San Gabriel Basin Watermaster-Resolution #6-90-85 of Main San Gabriel Basin Watermaster amending its rules & regulations by adding section 28 thereto, re groundwater quality management1436
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
Stan Yarbrough
Valley County Water District
Ltr: Transmittal of tables re results of analyses performed on samples collected fr Valley County Water District well(s) & abbreviation key, w/attchs1580
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
David De Jesus
Covina Irrigating Co
Ltr: Transmittal of tables re results of analyses performed on samples collected fr Covina Irrigating Co well(s) & abbreviation key, w/attchs1581
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
Steve Polopolus, resident
City of Corona
Ltr: Transmittal of tables re results of analyses performed on samples collected from S Polopolous' well(s) & abbreviation key, w/attchs1582
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
Tony Lucero
CalMat Co
Ltr: Transmittal of tables summarizing results of analyses performed on samples collected fr Calmat well(s) & abbreviation key, w/attchs1583
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
Ray McCardell
Sonoco Products Co
Ltr: Transmittal of tables summarizing results of analyses performed on samples collected from Sonoco Products well(s) & abbreviation key, w/attchs1584
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
Richard Wulfing
Los Angeles County - Dept of Parks & Recreation
Ltr: Transmittal of tables summarizing results of analyses performed on samples collected from LA County well(s) & abbreviation key, w/attchs1585
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
Gerry Butler
Criterion Catalyst Co, L P
Ltr: Transmittal of tables summarizing results of analyses performed on samples collected fr Criterion Catalysts well(s) & abbreviation key, w/attchs1586
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
Gerald Black
San Gabriel Valley Water Co
Ltr: Transmittal of tables summarizing results of analyses performed on samples collected fr San Gabriel Valley Water Co well & key, w/attchs1587
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
George Farag
Los Angeles County - Dept of Public Works
Ltr: Transmittal of tables re results of analyses performed on samples collected from LA County Dept of Public Works well & abbreviation key, w/attch1596
6/10/91Wayne Praskins
Environmental Protection Agency - Region 9
Tony Zampiello
City of Glendora
Ltr: Transmittal of tables summarizing results of analyses performed on samples collected fr City of Glendora well(s) & abbreviation key, w/attchs1597
6/17/91Wayne Praskins
Environmental Protection Agency - Region 9
Mike Sorensen
CA Dept of Health Services
Ltr: Notification of RI activities in new Baldwin Park OU for San Gabriel Valley sties & request to be informed of any relevant changes in state ARARs or additional ARARs, w/o attch9776
6/25/91C H 2 M HillEnvironmental Protection Agency - Region 9Technical memo: San Gabriel area 5 RI, sampling of existing wells2467
6/25/91Wayne Praskins
Environmental Protection Agency - Region 9
Pete Coutts
Chemical Waste Management, Inc
Ltr: Transmittal of results from 1st round of sampling of water supply & monitoring wells in Azusa/Baldwin Park area & well location map, w/o attchs11823
7/1/91Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG284, 285, 286, 3071534
7/1/91Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG309, 310, 3161535
7/1/91I C F Technology, Inc-Data validation rpts: EPA sampling well 1902920, 1900882, 1902971, 8000070, 1901524, 1900029, 1900034, 8000039, 719903093, 1900035, 1902169, 19008311593
7/1/91David Jones
Environmental Protection Agency - Region 9
Anthony Fellow
Main San Gabriel Basin Water Quality Authority
Ltr: Review of negative declaration & initial study for San Gabriel Basin groundwater cleanup pilot & demonstration plants & other docs re proposed wellhead treatment project for Covina Irrigating Co (CIC) site11869
7/1/91David Jones
Environmental Protection Agency - Region 9
Anthony Fellow
Main San Gabriel Basin Water Quality Authority
Ltr: Acknowledgment of receipt of & comments on materials re proposed Arrow Well wellhead treatment project dated 4/12/91 & 6/12/9111870
8/6/91Roy Sakaida
CA Regional Water Quality Control Board - Los Angeles Region
Paul McGuirk
Phaostron Instrument & Electronic Co, Inc
Ltr: Approval of vapor sampling plan, referencing ltr 6/26/91 - Phaostron Instruments & Electronics Co [File #108.0678]11913
8/7/91David Towell
C H 2 M Hill

Robert Collar
C H 2 M Hill
Gail Jones
Environmental Protection Agency - Region 9
Memo: Notice of intent to collect initial groundwater samples fr monitor wells in RI areas 4, 5 & 6, w/o request for analyses table 5-4 & appendix A11611
9/1/91E N S R Consulting & EngineeringValspar Corp, TheGroundwater monitoring rpt - Valspar Azusa facility, 1004 W 10th St, Azusa [File #108.1034]2665
9/1/91Rameen Moezzi
I C F Technology, Inc
-Data validation rpts & laboratory results for EPA monitor wells 1-MP, 2-2, 2-3, 2-4, 2-5, 6-1, 6-2, 5-1, w/sample number cross reference lists, 9/914175
9/3/91Wayne Praskins
Environmental Protection Agency - Region 9
-Handout describing EPA plans for proj in Baldwin Park area provided to water purveyor representatives, attendees included R Stone, G Black, etc11862
9/16/91England, Shahin & AssocNorac Co, Inc, ThePhase 3 subsurface investigation & groundwater monitoring results - Norac Co, 405 S Motor Ave, Azusa [File #108.0566]1508
10/1/91Truesdail Laboratories, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG321, 323, 3241536
10/3/91Steve Scauzillo
San Gabriel Valley Tribune, Inc
-Newsclip: Aerojet to pay for cleanup10737
10/8/91Wayne Praskins
Environmental Protection Agency - Region 9
Nick Pogoncheff
Harding Lawson Assoc
Ltr: Transmittal of table summarizing results of analyses of water samples collected from 12 gw wells in Azusa/Baldwin Park area & map, w/o attchs11824
10/8/91Wayne Praskins
Environmental Protection Agency - Region 9
Main San Gabriel Basin Watermaster

Steve Johnson
Stetson Engineers, Inc
Ltr: Transmittal of 4 items describing recent EPA-sponsored sampling in San Gabriel basin, w/o attchs11826
10/9/91William Uhl
Triad Geotechnical Consultants, Inc
Phaostron Instrument & Electronic Co, IncLtr: Discovery well construction & soil vapor tests, ref workplan 5/22/90, 7/16/91, Regional Board ltr 4/2/91 [File #108.0678]2668
10/11/91Westbay Instruments, Inc-Completion rpt for monitoring well MW5-1 equipped with Westbay's MP system, San Gabriel Basin characterization study, w/ltr to D Desai, 10/11/911817
10/15/91Wayne Praskins
Environmental Protection Agency - Region 9
Steve Johnson
Stetson Engineers, Inc

Main San Gabriel Basin Watermaster
Ltr: Transmittal of validated results of VOC analyses fr recent EPA-sponsored sampling in San Gabriel basin & cross reference list, w/o attchs11825
10/24/91C H 2 M HillEnvironmental Protection Agency - Region 9Draft workplan, Baldwin Park OUFS1572
10/28/91Esteban Torres
US House of Representatives
Los Angeles TimesNewsclip: Perspective on pollution, it's do-it-ourselves time - contamination of San Gabriel Valley spreading, cleanup partnership proposed, w/map on water contamination in Valley & photo of Representative E Torres10390
11/21/91David Towell
C H 2 M Hill

Robert Collar
C H 2 M Hill
Gail Jones
Environmental Protection Agency - Region 9
Memo: Notice of intent to collect quarterly groundwater samples fr monitoring wells in RI areas 4, 5 & 6, w/request for analyses table, w/o appendix A11877
12/1/91Carolyn Studeny
I C F Technology, Inc
-Data validation rpts & laboratory analysis for EPA monitoring well 5-1, w/sample number cross reference list, 12/915596
12/2/91C H 2 M HillEnvironmental Protection Agency - Region 9Technical memo: Well logging & depth-specific sampling of wells - San Gabriel area 5 remedial investigation5421
12/16/91Wayne Praskins
Environmental Protection Agency - Region 9
John Maulding
Main San Gabriel Basin Watermaster
Ltr: Transmittal of results of EPA-sponsored well logging & depth-specific sampling in Baldwin Park area, 1/91-5/91, w/o attch11829
12/16/91Wayne Praskins
Environmental Protection Agency - Region 9
Jonathan Bishop
CA Regional Water Quality Control Board - Los Angeles Region
Ltr: Transmittal of 2 rpts providing results of EPA-sponsored sampling in Baldwin Park area, w/o attchs11830
12/16/91Wayne Praskins
Environmental Protection Agency - Region 9
Mike Sorensen
CA Dept of Health Services
Ltr: Transmittal of 2 rpts providing results of EPA-sponsored sampling in Baldwin Park area, w/o attchs11831
12/16/91Wayne Praskins
Environmental Protection Agency - Region 9
Timothy Jochem
Upper San Gabriel Valley Municipal Water District
Ltr: Transmittal of 2 rpts providing results of EPA-sponsored sampling in Baldwin Park area, w/o attchs11832
12/16/91Wayne Praskins
Environmental Protection Agency - Region 9
Kris Helm
Metropolitan Water District of Southern California
Ltr: Transmittal of 2 rpts providing results of EPA-sponsored sampling in Baldwin Park area, w/o attchs11833
12/16/91Wayne Praskins
Environmental Protection Agency - Region 9
Karl Johnson
Main San Gabriel Basin Water Quality Authority
Ltr: Transmittal of 2 rpts providing results of EPA-sponsored sampling in Baldwin Park area, w/o attchs11834
12/19/91John Klein
US Dept of the Interior - Geological Survey
Greg Woodside
C H 2 M Hill
Ltr: Transmittal of instream surface water flow rates in San Gabriel River, 1985/86 to 1990/911442
12/19/91US Dept of the Interior - Geological Survey-Table: Flow rates in San Gabriel River below Santa Fe Dam, 1985-19921455
1/1/92K Martins
C H 2 M Hill
-Article: Practical guide to determine impact of radon & other radionuclides on water treatment processes (Water Science Technology, v26, #5-6: 1255-641427
1/1/92E N S R Consulting & EngineeringValspar Corp, TheGroundwater monitoring rpt - Valspar Azusa facility, 1004 W 10th St, Azusa [File #108.1034]1490
1/8/92Environmental Protection Agency - Region 9-Handout at meeting w/San Gabriel Basin water purveyors, w/list of attendees11964
1/10/92Steve Scauzillo
San Gabriel Valley Tribune, Inc
-Newsclip: San Gabriel Basin Watermaster power slashed - court: political use of funds violated board authority10386
1/14/92Lee Dodge
Chemical Waste Management, Inc
Dennis Dickerson
CA Environmental Protection Agency - Dept of Toxic Substances Control

Jeff Zelikson
Environmental Protection Agency - Region 9
Ltr: Response to EPA's views re RCRA facility investigation (RFI), phase 3 expressed at 12/23/91 meeting, w/proposed monitoring well locations map11967
1/21/92Wayne Praskins
Environmental Protection Agency - Region 9
Nick Pogoncheff
Harding Lawson Assoc
Ltr: Transmittal of CH2M Hill memo re results of logging & depth-specific sampling of 5 existing wells in Azusa/Baldwin Park area, w/o attch11808
1/22/92Wayne Praskins
Environmental Protection Agency - Region 9
Gene Shafer
Suburban Water Systems
Ltr: Transmittal of results of logging & depth-specific sampling of Suburban Water Systems well, w/o attchs11804
1/22/92Wayne Praskins
Environmental Protection Agency - Region 9
Gerald Black
San Gabriel Valley Water Co
Ltr: Transmittal of results of logging & depth-specific sampling of San Gabriel Valley Water Co well, w/o attchs11805
1/22/92Wayne Praskins
Environmental Protection Agency - Region 9
David De Jesus
Covina Irrigating Co
Ltr: Transmittal of results of logging & depth-specific sampling of Covina Irrigating Co well, w/o attchs11806
1/22/92Wayne Praskins
Environmental Protection Agency - Region 9
Stan Yarbrough
Valley County Water District
Ltr: Transmittal of results of logging & depth-specific sampling of Valley County Water District wells, w/o attchs11807
1/22/92Los Angeles County - Dept of Public Works-Table: Amounts of water recharged at Santa Fe spreading grounds, 1987-199211959
1/30/92Law Environmental, IncAzusa Land Reclamation Co, Inc1991 annual rpt, groundwater monitoring & waste disposal - Azusa Land Reclamation Landfill, Azusa1552
2/5/92Jeff Zelikson
Environmental Protection Agency - Region 9
Lee Dodge
Chemical Waste Management, Inc
Ltr: Approval of RCRA facility investigation, phase 3 for Oil & Solvent Process Co, Azusa, 11/18/91, w/o mail receipt #P678-973-42911966
2/12/92Levine-Fricke-Workplan #3, soil vapor monitoring well nest & groundwater monitoring well installation - Wynn Oil Co facility, Azusa [File #108.0598]1550
3/2/92Wayne Praskins
Environmental Protection Agency - Region 9
-Handout describing Superfund process provided to attendees at Main San Gabriel Basin Water Quality Authority public advisory group11861
3/4/92Robert Collar
C H 2 M Hill
Jane Anderson
Environmental Protection Agency - Region 9
Memo: Notice of intent to collect quarterly groundwater samples fr monitoring wells in RI areas 4, 5 & 6, w/request for analyses, table 1 & appendix A, analytical & QC procedures1821
3/4/92Wayne Praskins
Environmental Protection Agency - Region 9
John Maulding


Main San Gabriel Basin Watermaster
Ltr: Transmittal of validated results of VOC analyses fr EPA's Baldwin Park monitoring well #5-1, 1st round of sampling completed 9/91, w/o attchs11841
3/4/92Wayne Praskins
Environmental Protection Agency - Region 9
James Goodrich
San Gabriel Basin Water Quality Authority
Ltr: Transmittal of EPA's San Gabriel supplemental sampling plan rpt completed 5/86 (3 v), w/o attchs11842
3/6/92Wayne Praskins
Environmental Protection Agency - Region 9
Robert Pease
South Coast Air Quality Management District
Ltr: Request that support agency communicate additional ARARs for Baldwin Park OU, w/attchs11555
3/6/92Wayne Praskins
Environmental Protection Agency - Region 9
Mike Sorensen
CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Request that support agency communicate additional ARARs for Baldwin Park OU, w/attchs11556
3/6/92Wayne Praskins
Environmental Protection Agency - Region 9
Ken Harris
CA Water Resources Control Board
Ltr: Request that support agency communicate additional ARARs for Baldwin Park OU, w/attchs11557
3/6/92Roy Sakaida
CA Regional Water Quality Control Board - Los Angeles Region
Mark Filowitz
Wynn Oil Co
Ltr: Approval of 2/12/92 soil vapor & groundwater monitoring wells workplan - Wynn Oil Co, Azusa [File #108.0598]11910
3/9/92Stephen Johnson
Stetson Engineers, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Response to Wayne Praskins's inquiry re local work being performed on trend of basin contamination & vulnerability of wells to VOC contamination11844
3/12/92Wayne Praskins
Environmental Protection Agency - Region 9
Nick Pogoncheff
Harding Lawson Assoc
Ltr: Transmittal of table re results of 1st 2 rounds of sampling of EPA-sponsored wells near mouth of Puente basin (#MW6-1, MW6-2A, MW6-2B), w/o attchs11843
4/1/92Engineering-Science, IncCalifornia Portland Cement CoContaminated soil excavation & removal rpt - California Portland Cement Co, 1030 W Gladstone, Azusa [File #108.1709]339
4/1/92E N S R Consulting & EngineeringValspar Corp, TheGroundwater monitoring rpt - Valspar Azusa facility, 1004 W 10th St, Azusa [File #108.1034]1491
4/1/92Barbara Gordon
I C F Technology, Inc
-Data validation rpts & laboratory results for EPA monitor wells 1-MP, 2-2, 2-3, 2-4, 2-5, 5-1, 6-1, 6-2, w/sample # cross reference lists, 4/925958
4/13/92Joan Dollarhide
Environmental Protection Agency - Environmental Criteria & Assessment Office
Stanford Smucker
Environmental Protection Agency - Region 9
Memo: Transmittal of provisional oral RfD for trichloroethylene (TCE) (CAS #79-01-6)(Motorola 52nd St, Phoenix, AZ), w/attch1440
4/29/92David Jones
Environmental Protection Agency - Region 9
Mark Leary
CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: No response re 2 requests (6/91, 3/92) that state identify ARARs for Baldwin Park OU11315
5/1/92Environmental Protection Agency - Region 9-Fact sheet: EPA & Regional Board enforcement programs in San Gabriel Valley (#12)10814
5/11/92Stanford Smucker
Environmental Protection Agency - Region 9
Wayne Praskins
Environmental Protection Agency - Region 9
Memo: Review of draft preliminary risk assessment, Baldwin Park operable unit feasibility study 4/24/92 prepared by CH2M Hill14025
5/15/92Jonathan Harris
C H 2 M Hill
Brendan Harley
Camp Dresser & McKee, Inc
Ltr: Transmittal of Bernoulli cartridge of water quality data for production & monitoring wells through 1/92 & input & output files for CFEST-based groundwater model developed as part of RI of San Gabriel Basin, w/o attchs12212
5/22/92Wayne Praskins
Environmental Protection Agency - Region 9
Andrew Shelton
Meredith/Boli & Assoc, Inc
Ltr: Transmittal of floppy disc containing 6 files from EPA's San Gabriel basin groundwater database, for use in investig of OSCO in Azusa, w/o attchs11845
5/26/92Frances McChesney
CA Water Resources Control Board
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: State & Regional Board applicable & relevant & appropriate requirements (ARARs) for Baldwin Park OU, w/o attch11665
6/1/92E N S R Consulting & EngineeringValspar Corp, TheGroundwater monitoring rpt - Valspar Azusa facility, 1004 W 10th St, Azusa [File #108.1034]1492
6/9/92David Towell
C H 2 M Hill
Jane Anderson
Environmental Protection Agency - Region 9
Memo: Notice of intent to collect quarterty groundwater samples fr monitoring wells in San Gabriel RI areas 4, 5 & 6, w/request for analysis table11610
6/10/92Frances McChesney
CA Water Resources Control Board
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmittal of correct attch for 5/26/92 ltr re State & Regional Water Board ARARs for Baldwin Park OU, w/attch11666
6/17/92Daniel McGovern
Environmental Protection Agency - Region 9
James Strock
CA Environmental Protection Agency
Ltr: Request for meeting with C Boronkay of Metropolitan Water District of Southern California in late 8/92 & transmittal of issue paper entitled involvement of MWDSC in cleanup of San Gabriel Basin, w/attch11314
6/22/92Levine-Fricke-Groundwater monitoring well installation & initial sampling results - Wynn Oil Co facility, Azusa [File #108.0598]1549
6/22/92Frank Stillman
Triad Geotechnical Consultants, Inc
Paul McGuirk
Phaostron Instrument & Electronic Co, Inc
Ltr: Water sample/soil gas survey 2 - Phaostron, 717 N Coney Ave, Azusa, w/attchs [File #108.0678]1568
7/1/92Ian Jensen
I C F Technology, Inc
-Data validation rpts & laboratory results for EPA monitor wells 1-MP, 2-2, 2-3, 2-4, 2-5, 5-1, 6-1, 6-2, w/sample number cross reference lists, 7/925975
7/14/92Stephen Torres
Levine-Fricke
Alex Carlos
CA Regional Water Quality Control Board - Los Angeles Region
Ltr: Purging test for soil vapor wells - Wynn Oil Co, Azusa, w/o attch [File #108.0598]11911
7/21/92C H 2 M HillEnvironmental Protection Agency - Region 9Interim RI rpt, San Gabriel Basin2497
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
James Goodrich
Main San Gabriel Basin Water Quality Authority
Ltr: Transmittal of EPA interim RI rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11793
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
Richard Hansen
Three Valleys Municipal Water District
Ltr: Transmittal of EPA interim remedial investigation rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11794
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
John Norman
Central & West Basin Water Replenishment District
Ltr: Transmittal of EPA interim RI rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11795
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
Richard Atwater
Central Basin Municipal Water District
Ltr: Transmittal of EPA interim remedial investigation rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11796
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
Timothy Jochem
Upper San Gabriel Valley Municipal Water District
Ltr: Transmittal of EPA interim remedial investigation rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11797
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
Tim Hampton
Metropolitan Water District of Southern California
Ltr: Transmittal of EPA interim remedial investigation rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11798
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
Mike Sorensen
CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Transmittal of EPA interim remedial investigation rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11799
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
Jonathan Bishop
CA Regional Water Quality Control Board - Los Angeles Region
Ltr: Transmittal of EPA interim remedial investigation rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11800
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
John Maulding
Main San Gabriel Basin Watermaster
Ltr: Transmittal of EPA interim remedial investigation rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11801
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
Ken Harris
CA Water Resources Control Board
Ltr: Transmittal of EPA interim remedial investigation rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11802
7/21/92Wayne Praskins
Environmental Protection Agency - Region 9
Bob Stallings
San Gabriel Valley Municipal Water District
Ltr: Transmittal of EPA interim remedial investigation rpt & 2 bibliographies listing docs describing sampling efforts, w/o attchs11803
7/24/92California EnvironmentalFairchild Industries, IncInstallation & sampling of soil gas vapor test wells rpt - Pacific Precision Metals (aka Tubing Seal Cap), 601 S Vincent Ave, Azusa [File #108.1029]1942
8/6/92Levine-Fricke-Groundwater monitoring rpt - Wynn Oil facility, Azusa [File #108.0598]1569
9/1/92Environmental Protection Agency - Region 9-Fact sheet: EPA announces proposed plan for Whittier Narrows (#13)10811
9/16/92Robert Collar
C H 2 M Hill
Jane Anderson
Environmental Protection Agency - Region 9
Memo: Notice of intent to collect quarterly groundwater samples fr monitoring wells in RI areas 4, 5 & 6, w/request for analyses table, w/o appendix A1566
9/22/92Steve Scauzillo
San Gabriel Valley Tribune, Inc
-Newsclip: Wilson OKs Valley water cleanup agency11856
9/23/92Wayne Praskins
Environmental Protection Agency - Region 9
John Maulding
Main San Gabriel Basin Watermaster
Ltr: Request to arrange meeting between EPA & water purveyors to discuss EPA plans for Baldwin Park operable unit (unsigned)11792
9/23/92Wayne Praskins
Environmental Protection Agency - Region 9
John Maulding
Main San Gabriel Basin Watermaster
Ltr: Topics to be discussed at meeting with water producers that may be affected by EPA's upcoming proposal for large groundwater extraction & treatment project in Azusa/Irwindale/Baldwin Park area11846
9/24/92C H 2 M HillEnvironmental Protection Agency - Region 9Draft Baldwin Park OU FS rpt1816
9/24/92Wayne Praskins
Environmental Protection Agency - Region 9
John Maulding
Main San Gabriel Basin Watermaster
Ltr: Transmittal of & request for comments on interagency draft copy of Baldwin Park operable unit feasibility study (unsigned), w/o attch11847
9/24/92Wayne Praskins
Environmental Protection Agency - Region 9
Mike Sorensen
CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Transmittal of & request for comments on interagency draft copy of Baldwin Park operable unit feasibility study (unsigned), w/o attch11848
9/24/92Wayne Praskins
Environmental Protection Agency - Region 9
Hank Yacoub
CA Regional Water Quality Control Board - Los Angeles Region
Ltr: Transmittal of & request for comments on interagency draft copy of Baldwin Park operable unit feasibility study (unsigned), w/o attch11849
9/24/92Wayne Praskins
Environmental Protection Agency - Region 9
Tim Hampton
Metropolitan Water District of Southern California
Ltr: Transmittal of & request for comments on interagency draft copy of Baldwin Park operable unit feasibility study (unsigned), w/o attch11850
9/24/92Wayne Praskins
Environmental Protection Agency - Region 9
James Goodrich
Main San Gabriel Basin Water Quality Authority
Ltr: Transmittal of & request for comments on interagency draft copy of Baldwin Park OUFS (unsigned), w/o attch11851
9/25/92Richard Buell
CA Energy Commission
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmittal of in-state criteria pollutant emission reduction values & modeling assumptions, testimony of R Buell, et al, for 12/5/91 ER-92 hearings, w/attchs1456
9/25/92Steve Scauzillo
San Gabriel Valley Tribune
-Newsclip: Torres says EPA chief out of touch with Valley11857
9/30/92Wayne Praskins
Environmental Protection Agency - Region 9
-Handout describing EPA's Baldwin Park project provided at meeting of water purveyor representatives - attendees included R Stone, G Black, etc11863
10/1/92E N S R Consulting & EngineeringValspar Corp, TheGroundwater monitoring rpt - Valspar Azusa facility, 1004 W 10th St, Azusa [File #108.1034]1493
10/1/92Clinical Laboratory of San Bernardino, Inc-Laboratory analytical results for water purveyor Title 22 sampling (provided by Main San Gabriel Basin Watermaster) - packets SG369-3721521
10/1/92Ian Jensen
I C F Technology, Inc
-Data validation rpts & laboratory results for EPA monitor wells 1-MP, 2-2, 2-3, 2-4, 2-5, 5-1, 6-1, 6-2, w/sample number cross reference lists, 10/925858
10/1/92C H 2 M Hill-Table: Sampling results for VOCs at EPA monitoring well 5-1 (spring 1992, summer 1992 & fall 1992)6248
10/1/92Wayne Praskins
Environmental Protection Agency - Region 9
Gerald Black
San Gabriel Valley Water Co
Ltr: Transmittal of & request for comments on EPA's draft Baldwin Park operable unit feasibility study (unsigned), w/o attch11854
10/1/92Wayne Praskins
Environmental Protection Agency - Region 9
Reginald Stone
Suburban Water Systems
Ltr: Transmittal of & request for comments on EPA's draft Baldwin Park operable unit feasibility study (unsigned), w/o attch11855
10/1/92Gerald Black
San Gabriel Valley Water Co
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Request for meeting to discuss possibility of San Gabriel Valley Water Co receiving water from EPA's Azusa/Irwindale/Baldwin Park operable unit11954
10/2/92Wayne Praskins
Environmental Protection Agency - Region 9
Timothy Jochem
Upper San Gabriel Valley Municipal Water District
Ltr: Transmittal of & request for comments on draft Baldwin Park operable unit feasibility study (unsigned), w/o attch11853
10/6/92Reginald Stone
Suburban Water Systems
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Expression of interest in evaluating possibility of receiving treated water from EPA proposed treatment facility & request for project rpts11955
10/7/92Wayne Praskins
Environmental Protection Agency - Region 9
Don Nichols
Los Angeles County - Dept of Public Works
Ltr: Transmittal of & request for comments on pp 9-1 to 9-12 of draft Baldwin Park OUFS (unsigned), w/o attch11852
10/14/92Geoffrey Nunn
California Domestic Water Co (Whittier)
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Expression of interest to receive water fr central treatment facility & recommendation that EPA work with San Gabriel Valley [sic] Water Quality Authority11953
10/15/92Robert Collar
C H 2 M Hill

David Towell
C H 2 M Hill
Wayne Praskins
Environmental Protection Agency - Region 9
Technical memo: San Gabriel area 5 remedial investigation, sampling of existing wells, 2nd round1830
10/16/92Environmental Protection Agency - Region 9C H 2 M HillWork assignment forms 1-9, 11/6/91-10/16/92, Baldwin Park operable unit1445
10/21/92Tom Kremer
Environmental Protection Agency - Region 9
Mark Leary
CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Response to Mike Sorensen's request for additional time to review draft Baldwin Park operable unit feasibility study & comments on schedule11608
10/26/92David Towell
C H 2 M Hill
Wayne Praskins
Environmental Protection Agency - Region 9
Technical memo: San Gabriel area 5 remedial investigation, monitoring well installation & sampling1831
10/27/92James Goodrich
Main San Gabriel Basin Water Quality Authority
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on draft Baldwin Park operable unit feasibility study rpt dated 9/24/9211607
11/4/92Mike Sorensen
CA Environmental Protection Agency - Dept of Toxic Substances Control
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmittal of general comments/suggestions on draft Baldwin Park operable unit feasibility study rpt 9/24/92, w/attch1818
11/4/92James Goodrich
Main San Gabriel Basin Water Quality Authority
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmittal of Baldwin Park operable unit feasibility study alternative remediation plan & request for meeting to discuss project time, w/attch1819
11/6/92David Jones
Environmental Protection Agency - Region 9
Nick Pogoncheff
Harding Lawson Assoc
Ltr: Response to FOIA request #2582-92 in 10/23/92 ltr & transmittal of technical memo, area 5 monitoring well installation & sampling & tables, w/o attchs11866
11/10/92Duane Georgeson
Metropolitan Water District of Southern California
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: General comments on draft Baldwin Park operable unit feasibility study rpt (OUFS) 9/24/92, w/list of specific comments1820
11/10/92David Chamberlin
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: FOIA request for CFEST data, GIS database, piezometric head data for basin, etc11962
11/13/92Stephen Hahn
C H 2 M Hill
Doug Frazer
Environmental Protection Agency - Region 9
Ltr: Baldwin Park workplan amendment #1, w/attch11970
11/17/92John Maulding
Main San Gabriel Basin Watermaster
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on draft Baldwin Park operable unit feasibility study rpt dated 9/24/9211606
11/24/92Hank Yacoub
CA Regional Water Quality Control Board - Los Angeles Region
Carol Williams
Main San Gabriel Basin Watermaster
Ltr: Approval of request 11/11/92 for authorization to retest Big Dalton well under general NPDES permit #CAG99500013581
12/14/92Jonathan Bishop
CA Regional Water Quality Control Board - Los Angeles Region
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on draft Baldwin Park operable unit feasibility study rpt12
12/17/92Steve Tamaya
San Gabriel Valley Tribune
-Newsclip: Torres plans fresh attack to clean up groundwater11859
12/22/92David Jones
Environmental Protection Agency - Region 9
Duane Georgeson
Metropolitan Water District of Southern California
Ltr: Expression of decreased enthusiasm for joint project with Metropolitan Water District in groundwater extraction & treatment in Baldwin Park area11867
12/23/92Dames & Moore-Rpt of supplementary subsurface investigation - Rubber/Urethanes Inc, 968 W Foothill Blvd, Azusa450
12/23/92Robert Collar
C H 2 M Hill
Roseanne Sakamoto
Environmental Protection Agency - Region 9
Memo: Quarterly sampling of monitoring wells in San Gabriel RI area 5 & Whittier Narrows, w/attchs11865
1/1/93E N S R Consulting & EngineeringValspar Corp, TheGroundwater monitoring rpt - Valspar Azusa facility, 1004 W 10th St, Azusa [File #108.1034]1494
1/11/93Meredith/Boli & Assoc, IncChemical Waste Management, IncRCRA facility investigation (phase 3), groundwater investigation, 2v - Oil & Solvent Process Co, Azusa1555
1/13/93Wayne Praskins
Environmental Protection Agency - Region 9
David Chamberlin
Camp Dresser & McKee, Inc
Ltr: Transmittal of EPA technical memo describing refinements to San Gabriel Basin numerical groundwater flow model, w/o attch12887
1/18/93Wayne Praskins
Environmental Protection Agency - Region 9
Tim Hampton
Metropolitan Water District of Southern California
Ltr: Transmittal of EPA technical memo describing refinements to San Gabriel Basin numerical groundwater flow model, w/o attch11952
1/18/93Wayne Praskins
Environmental Protection Agency - Region 9
John Maulding
Main San Gabriel Basin Watermaster
Ltr: Transmittal of EPA technical memo describing refinements to San Gabriel Basin numerical groundwater flow model, w/o attch11956
1/18/93Wayne Praskins
Environmental Protection Agency - Region 9
Timothy Jochem
Upper San Gabriel Valley Municipal Water District
Ltr: Transmittal of EPA technical memo describing refinements to San Gabriel Basin numerical groundwater flow model, w/o attch11957
1/18/93Wayne Praskins
Environmental Protection Agency - Region 9
James Goodrich
Main San Gabriel Basin Water Quality Authority
Ltr: Transmittal of EPA technical memo describing refinements to San Gabriel Basin numerical groundwater flow model, w/o attch11958
1/28/93Greg Woodside
C H 2 M Hill
Wayne Praskins
Environmental Protection Agency - Region 9
Technical memo: San Gabriel Basin groundwater modeling1814
1/29/93Applied ConsultantsDon White
R P M Merit
Vapor monitoring well field results, 3rd episode - RPM-Merit facility, 145 S Irwindale Ave, Azusa466
1/29/93Law/Crandall, IncAzusa Land Reclamation Co, Inc1992 annual rpt, groundwater monitoring & waste disposal - Azusa Land Reclamation Landfill, Azusa, w/rtg note fr R Nelson, Regional Board1551
2/10/93Anthony Zampiello
City of Glendora - Water Dept
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: General water requirements, system elevations & cost of water, w/water system schematic, City of Glendora13718
2/11/93Robert Pedigo
Los Angeles County - Dept of Public Works

T Tidemanson
Los Angeles County - Dept of Public Works
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on (draft) Baldwin Park OUFS rpt21375
2/18/93Los Angeles County - Dept of Public Works-Tables: Volumes of water recharged in San Gabriel basin spreading grounds & river channels1570
2/18/93Carl Bononkay
Metropolitan Water District of Southern California
John Wise
Environmental Protection Agency - Region 9
Ltr: Response to issues in D Jones' ltr dated 12/22/92 & update on Metropolitan Water District's progress re timetable discussed at 11/24/92 mtg, w/attchs1588
2/23/93William Bater, IV
Applied Consultants

Bernard Luther
Applied Consultants

David Worthington
Applied Consultants
Don White
R P M Merit
Ltr: Transmittal of vapor monitoring well field results, 3rd episode - Noram Corp, 204 S Motor Ave, Azusa, w/attch [File #108.0943]462
2/25/93Philip Chandler
CA Regional Water Quality Control Board - Los Angeles Region
William Maya
Birtcher Medical Systems

Raymond Bond
E G & G Birtcher Industrial Products

Ernest Jarvis, resident
City of Whittier

Hyrum Jarvis, resident
City of Whittier
Ltr: Approval of extension request for submittal of addendum ltr to 10/2/92 workplan - property at 4501 & 4505 Arden Dr, El Monte [File #103.0116, 103.0647]11922
3/1/93Main San Gabriel Basin Water Quality Authority-San Gabriel Basin interagency meetings, agendas & minutes, 11/91-3/931437
3/4/93CA Environmental Protection Agency-Agenda of meeting on San Gabriel Basin cleanup between US EPA, CA EPA & industry coalition, w/sign-up sheet11963
3/5/93Barbara Gordon
I C F Technology, Inc
-Data validation rpt: Case/SAS #LV3S19, memo #1, SAS volatiles analysis, 20 groundwater samples, #SY4692-SY4711, w/cross reference list, MW5-1, 1/931571
3/7/93Steven Tamaya
San Gabriel Valley Tribune
-Newsclip: Torres, EPA suddenly become allies in Valley cleanup - agency expected to endorse bill for joint project11858
3/11/93Frank LoGuidice
San Gabriel Valley Water Co
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: 7 scenarios in response to inquiry re possibility of San Gabriel Valley Water Co receiving water produced & treated at proposed Baldwin Park OU11868
3/12/93Mark Klaiman
Environmental Protection Agency - Region 9
Mike Sorensen
CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Comments to questions re applicable or relevant & appropriate requirements (ARARs) for Baldwin Park operable unit in feasibility study rpt11976
4/2/93C H 2 M HillEnvironmental Protection Agency - Region 9Baldwin Park OUFS rpt1425
4/2/93C H 2 M HillEnvironmental Protection Agency - Region 9Baldwin Park OUFS rpt, attch A, groundwater quality data1426
4/14/93Greg Woodside
C H 2 M Hill
Wayne Praskins
Environmental Protection Agency - Region 9
Memo: Estimated lithology & hydraulic conductivity for approximately 700 wells in San Gabriel Basin1438
4/14/93Environmental Protection Agency - Region 9-Agenda for meeting between EPA, Metropolitan Water District & Dept of Toxic Substances Control11965
4/14/93Wayne Praskins
Environmental Protection Agency - Region 9
Mike Sorensen
CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Review of Dept of Toxic Substances Control's comments 11/4/92 on draft Baldwin Park operable unit feasibility study, w/o attch11971
4/14/93Wayne Praskins
Environmental Protection Agency - Region 9
Jonathan Bishop
CA Regional Water Quality Control Board - Los Angeles Region
Ltr: Response to Regional Board's comments on draft Baldwin Park operable unit feasibility study, 12/14/9211972
4/14/93Wayne Praskins
Environmental Protection Agency - Region 9
John Maulding
Main San Gabriel Basin Watermaster
Ltr: Expression of appreciation for comments on draft Baldwin Park OU feasibility study, 12/17/92 & promise of sending final study & proposed plan11973

4/14/93Wayne Praskins
Environmental Protection Agency - Region 9
Duane Georgeson
Metropolitan Water District of Southern California
Ltr: Response to Metropolitan Water District's comments dated 11/10/92 on draft Baldwin Park operable unit feasibility study11974
4/14/93Wayne Praskins
Environmental Protection Agency - Region 9
James Goodrich
San Gabriel Basin Water Quality Authority
Ltr: Response to San Gabriel Basin Water Quality Authority's comments on draft Baldwin Park OUFS dated 10/27/92 & 11/4/9211975
4/16/93Environmental Protection Agency - Region 9-Guidance documents for Baldwin Park operable unit administrative record1446
4/16/93Wayne Praskins
Environmental Protection Agency - Region 9
-Documents considered or relied upon but not included in San Gabriel Valley Area 2 superfund site - Baldwin Park operable unit administrative record11977
4/30/93Andrew Bain
Environmental Protection Agency - Region 9
San Gabriel Valley Tribune, IncAdvertising order for announcement of public comment period on Baldwin Park proposed plan, w/advertisement 5/7/93 & declaration (concurrence copy)189
5/1/93Environmental Protection Agency - Region 9-Fact sheet: Proposed plan - EPA proposes major groundwater extraction, treatment & distribution project in Baldwin Park area1423
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Don Nichols
Los Angeles County - Dept of Public Works
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14041
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Bill Bennington
City of Covina - Water Systems Div
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14042
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Harry Thomas
City of West Covina - Office of City Engineer
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14043
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Robert Bowcock
City of Azusa - Water Dept
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14044
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Ed Heck
Azusa Valley Water Co
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14045
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Anthony Zampiello
City of Glendora - Water Dept
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14046
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Reginald Stone
Suburban Water Systems
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14047
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
David De Jesus
Covina Irrigating Co
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14048
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Gerald Black
San Gabriel Valley Water Co
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14049
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Bob Stallings
San Gabriel Valley Municipal Water District
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14050
5/7/93Wayne Praskins
Environmental Protection Agency - Region 9
Timothy Jochem
Upper San Gabriel Valley Municipal Water District
Ltr: Transmittal of & request for comments on EPA proposed plan for Baldwin Park OU sent to 11 water purveyors & water agencies, w/o attch14051
5/8/93Gary Hopkins
San Gabriel Valley Tribune
-Newsclip: EPA sets local water cleanup (& announcement of community meeting 5/20/93)14026
5/8/93Los Angeles Times-Newsclip: San Gabriel Valley - EPA proposed $47-million plan to treat polluted water14027
5/10/93John Glass, resident
City of Glendale
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Expression of concern re responsibility for owner & others of industrial building in overall area of Baldwin Park proposed plan (handwritten)14206
5/13/93Berkley Hudson
Los Angeles Times
-Newsclip: Water officials hopeful about cleanup plan - $47 million EPA proposal announced Friday would build treatment plants in basin14028
5/14/93Wayne Praskins
Environmental Protection Agency - Region 9
-List of additional parties sent copies of Baldwin Park operable unit proposed plan 5/14/9314052
5/18/93Steve Scauzillo
San Gabriel Valley Tribune
-Newsclip: Cleanup projects on tap - public can comment on water treatment14029
5/20/93Wayne Praskins
Environmental Protection Agency - Region 9
-Overheads used in EPA presentation at Baldwin Park OU proposed plan public meeting190
5/20/93Environmental Protection Agency - Region 9-Transcript of proceedings, community meeting in matter of proposed plan for cleanup of groundwater contamination in Baldwin Park area Superfund proj453
5/20/93San Gabriel Basin Industry Coalition-Newsletter - coalition to help form Baldwin Park PRP group14217
5/21/93--Article: $47 million San Gabriel aquifer fix named (Superfund Week (5/21/93), v7, #20)14030
5/23/93Steve Scauzillo
San Gabriel Valley Tribune
-Newsclip: Water cleanup plan gets mixed blessing - group (East Valleys Organization) likes much of $47 million project14031
5/24/93William Peters
Trail Chemical Corp
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Expression of appreciation that W Praskins attended 5/20/93 Baldwin Park community meeting & comments on Baldwin Park proposed plan14207
5/25/93Wayne Praskins
Environmental Protection Agency - Region 9
Bruce Guter
City of West Covina - Public Library
Ltr: Transmittal of & request to make available to public paper copies of 3 Baldwin Park docs included on admin record microfilm, w/o attchs14208
5/26/93Steve Scauzillo
San Gabriel Valley Tribune
-Newsclip: Businesses seek delay to cleanup - (San Gabriel Basin Industry) Coalition questions groundwater problem14032
5/27/93Los Angeles Times-Newsclip: Firms wary of cleanup cost14033
5/27/93Steve Scauzillo
San Gabriel Valley Tribune
-Newsclip: Suspected water polluters prepare to challenge EPA14034
5/27/93Steve Scauzillo
San Gabriel Valley Tribune
-Newsclip: Businesses hold private meeting to discuss toxic cleanup plans14035
5/31/93Engineering News-Record-Article: EPA to pump & treat San Gabriel aquifer (Engineering News-Record, 5/31/93, p 14)14036
6/1/93John Maulding
Main San Gabriel Basin Watermaster
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on Baldwin Park proposed plan 5/9314209
6/4/93Muriel O'Brien
Three Valleys Municipal Water District
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on Baldwin Park operable unit feasibility study (OUFS) rpt 4/2/9314210
6/9/93Will Lee
San Gabriel Valley Economic Council
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on proposed plan for Azusa/Irwindale/Baldwin Park area & suggestions for EPA to consider before cleanup projects commence14211
6/12/93San Gabriel Valley Tribune-Newsclip: Public notice - EPA announces extension of public comment period on San Gabriel Valley Superfund site, Baldwin Park area proposed plan14053
6/16/93Inside EPA's Superfund Report-Article: EPA proposes $47 million pump & treat system in San Gabriel basin (Superfund Rpt, 6/16/93, p 12)14037
6/20/93Maxine Leichter
Sierra Club - Angeles Chapter
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on proposed plan for cleanup of groundwater in Azusa/Irwindale/Baldwin Park area14054
6/24/93Steve Scauzillo
San Gabriel Valley Tribune
-Newsclip: Millions possible for Valley groundwater treatment14038
6/25/93Inside EPA's California Report-Article: News briefs - San Gabriel basin water cleanup (Big Dalton facility) begins (California Rpt, 6/25/93, p 14)14039
6/25/93Mary Johnson
Superfund Working/Information Group
Jeff Rosenbloom
Environmental Protection Agency - Region 9
Ltr: Comments on proposed plan for Azusa/Irwindale/Baldwin Park area14212
6/25/93Mike Sorensen
CA Environmental Protection Agency - Dept of Toxic Substances Control
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on draft Baldwin Park operable unit proposed plan 3/24/9314218
7/1/93C H 2 M Hill-Table 1, summary of nitrate & detected VOCs in EPA well MW5-1, summer 199314055
7/1/93John Korey
East Valleys Organization

Carol Montano
East Valleys Organization
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on proposed plan for Baldwin Park operable unit 5/9314213
7/2/93Inside EPA's California Report-Article: San Gabriel Valley business coalition opposes costly EPA cleanup (California Rpt, 7/2/93, p 14)14040
7/6/93Robert Collar
C H 2 M Hill
Roseanne Sakamoto
Environmental Protection Agency - Region 9
Memo: Notification of intent to collect gw samples fr MWs in Whittier Narrows (Site Spill Identification #M4) & Baldwin Park (SSID #M5), w/attch14056
7/7/93 Resident
City of West Covina
Wayne Praskins
Environmental Protection Agency - Region 9
(Redacted, FOIA ex 6) Ltr: Comments on Baldwin Park OU/FS & proposed plan & transmittal of list of water wells with VOC levels above maximum, w/attch14214
7/9/93Robert Collar
C H 2 M Hill
Roseanne Sakamoto
Environmental Protection Agency - Region 9
Memo: Notification of intent to collect groundwater samples fr monitoring wells MW5-1 in Baldwin Park (Site Spill Identification #M5), w/attch14057
7/9/93Ronald Tressel
Azusa Pipe & Tube Bending Corp
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Notification that cleanup cost may force Azusa Pipe & Tube Bending out of business & that being declared PRP at this time is unfair14215
7/11/93 Resident
City of Lakewood
Wayne Praskins
Environmental Protection Agency - Region 9
(Redacted, FOIA ex 6) Ltr: Comments on Baldwin Park OU/FS14216
7/11/93 Resident
City of Hacienda Heights
Wayne Praskins
Environmental Protection Agency - Region 9
(Redacted, FOIA ex 6) Ltr: Comments on Baldwin Park OUFS, w/env14219
7/12/93Marc Yalom
Chemical Waste Management, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on EPA proposed Baldwin Park operable unit groundwater remedial plan14058
7/15/93San Gabriel Valley Tribune-Newsclip: Public notice - EPA announces 2nd extension of public comment period on San Gabriel Valley Superfund site, Baldwin Park area proposed plan14059
7/16/93Richard Greene
Greene Co
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Request for clarification on questions re illegal dumping of toxic drain cleaners, contaminants in groundwater, etc14220
7/16/93Floyd Wicks
Southern California Water Co
Jeff Rosenbloom
Environmental Protection Agency - Region 9
Ltr: Request for clarification on questions re EPA's proposed building of $47 million centralized water treatment plant in San Gabriel Valley, w/list of private water companies14221
7/30/93Wayne Praskins
Environmental Protection Agency - Region 9
Michael Whitehead
San Gabriel Valley Water Co
Ltr: Comments on San Gabriel Valley Water Co plan to install & operate treatment facility to remove VOCs fr gw extracted fr B6 water supply wells14222
8/1/93Camp Dresser & McKee, IncSan Gabriel Basin Industry CoalitionComments on feasibility study rpt & proposed plan, Baldwin Park operable unit457
8/4/93Nicholas Pogoncheff
Aerojet General Corp - Aerojet ElectroSystems Div
-Videotapes: Aerojet submission of Nicholas Pogoncheff testimony 8/4/93 (VHS, 2v, 1:48:00 & 1:03:00)41
8/9/93David Czamanske Jeff Rosenbloom
Environmental Protection Agency - Region 9
Ltr: Transmittal of testimony by D Czamanske at public hearing 8/6/93 conducted by California Assembly Committee on Groundwater Contamination, w/attch14060
8/10/93Suzanne Phinney
Aerojet General Corp
Wayne Praskins
Environmental Protection Agency - Region 9

Mark Klaiman
Environmental Protection Agency - Region 9
Ltr: Transmittal of documents as Aerojet General comments on Baldwin Park feasibility study & proposed plan, w/o attchs244
8/10/93Hilda Solis
CA Assembly
Jeff Rosenbloom
Environmental Protection Agency - Region 9
Ltr: Comments on EPA proposed plan for remediation of contaminated groundwater in Baldwin Park, Irwindale & Azusa14061
8/10/93Esteban Torres
US House of Representatives
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on Baldwin Park operable unit feasibility study rpt 4/2/9314223
8/10/93R Brown
Friends of San Gabriel River
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on interim solution at Baldwin Park operable unit & recommendation for adoption of alternative 3 in proposed plan 5/9314224
8/11/93Gregory McClintock
McClintock, Weston, Benshoof, Rochefort, Rubalcava & MacCuish, L L P
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Azusa Land Reclamation Co comments on feasibility study rpt & proposed plan for Baldwin Park operable unit, w/o attchs14062
8/11/93Duane Georgeson
Metropolitan Water District of Southern California
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on Baldwin Park operable unit proposed plan14225
8/11/93Viji Sadasivan
Advanced Environmental Controls
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on proposed project for groundwater extraction & treatment facilities to remove VOCs in Azusa/Irwindale/Baldwin Park area14226
8/11/93William Robinson
Upper San Gabriel Valley Municipal Water District
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on proposed alternatives at Baldwin Park operable unit & recommendation for adoption of option #3, w/business card of W Robinson14227
8/12/93Steven Miller
Erler & Kalinowski, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Wynn Oil Co comments on feasibility study rpt 4/1/93 [sic] for Baldwin Park operable unit, w/tables 1 & 2193
8/12/93Harding Lawson Assoc

David Keith Todd Consulting Engineers, Inc
-Review comments, proposed plan 5/93, Baldwin Park OU, w/plates 1-4454
8/12/93Harding Lawson Assoc

David Keith Todd Consulting Engineers, Inc
-Review comments, FS rpt 4/2/93, Baldwin Park OU455
8/12/93Harding Lawson Assoc

David Keith Todd Consulting Engineers, Inc
-Proposal for technical modifications, optimization of EPA Region 9 subarea 1 proposed project, Baldwin Park OU, w/plates456
8/12/93Mike Sorensen
CA Environmental Protection Agency - Dept of Toxic Substances Control
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments on Baldwin Park operable unit feasibility study rpt 4/2/93 & proposed plan 5/93, w/specific comments14063
8/26/93Dina David
I C F Technology, Inc
-Data validation rpt: EPA well MW5-1, case/SAS #LV3S57 memo #1, analysis SAS nitrite-N & nitrate-N, Baldwin Park, w/sample # cross reference list 7/93191
9/3/93Barbara Gordon
I C F Technology, Inc
-Data validation rpt: EPA well MW5-1, case/SAS #LV3S57 memo #2, analysis SAS volatiles, 17 groundwater samples, site Baldwin Park, w/tables 1 & 2192
9/7/93Marc Yalom
Chemical Waste Management, Inc
Jeff Zelikson
Environmental Protection Agency - Region 9

Dennis Dickerson
CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Transmittal of preliminary results of soil vapor samples collected at Oil & Solvent Process Co facility, Azusa, 8/3/93-8/4/93, w/attch26
9/8/93Linn Magoffin
Main San Gabriel Basin Watermaster
Jeff Rosenbloom
Environmental Protection Agency - Region 9
Ltr: Agreement with EPA that smaller plant will contain plume14228
9/23/93Victor Gleason
Metropolitan Water District of Southern California
John Maulding
Main San Gabriel Basin Watermaster
Ltr: Transmittal of updated form of conjunctive use agreement 8/9/93 & request for approval of agreement at Watermaster meeting 10/6/93, w/attchs443
9/28/93Terry Kelly
Rogers & Wells
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmittal of & request for confidentiality on Miller Brewing Co water quality data, w/attch14669
11/1/93Thomas Stetson
Main San Gabriel Basin Watermaster
Main San Gabriel Basin WatermasterMemo: Staff rpt on San Gabriel Valley Water Co application for water treatment facility, wells B6C & B6D, w/attchs194
11/5/93Timothy Jochem
Upper San Gabriel Valley Municipal Water District
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Confirmation of telephone conversation re proposed San Gabriel Valley Water Reclamation Program14064
11/15/93C H 2 M HillEnvironmental Protection Agency - Region 9Baldwin Park OUFS rpt, updated attch A, groundwater quality data195
11/19/93Aerojet General Corp - Aerojet ElectroSystems DivCA Regional Water Quality Control Board - Los Angeles RegionInitial results of shallow zone soil matrix & vapor monitoring well sampling, v2 of 2, appendices C & D - Azusa/Irwindale Study Area325
11/19/93Aerojet General Corp - Aerojet ElectroSystems DivCA Regional Water Quality Control Board - Los Angeles RegionInitial results of shallow zone soil matrix & vapor monitoring well sampling, v1 of 2 - Azusa/Irwindale Study Area, w/appendices A-C342
12/2/93Bruce Jernigan
Azusa Land Reclamation Co, Inc

Suzanne Phinney
Aerojet General Corp

Steven Richtel
Oil & Solvent Process Co
Wayne Praskins
Environmental Protection Agency - Region 9

Mark Klaiman
Environmental Protection Agency - Region 9
Ltr: Comments to supplement comments on Baldwin Park OUFS & proposed plan originally prepared by Harding Lawson 8/12/93, w/o attchs14229
12/7/93Inland Empire Environmental ServicesCA Regional Water Quality Control Board - Los Angeles RegionSupplemental A soil gas survey - Davidson Optronics, 2223 Ramona Blvd, W Covina [File #108.1669]27
2/8/94Main San Gabriel Basin WatermasterWayne Praskins
Environmental Protection Agency - Region 9
Technical memo: Comments on groundwater monitoring program (GMP) for Baldwin Park OU described in appendix E of draft FS rpt 4/2/93 prepared by CH2M Hill, w/attchs42
3/3/94Wayne Praskins
Environmental Protection Agency - Region 9
Mike Sorensen
CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Transmittal of & request for comments on draft record of decision, Baldwin Park operable unit, w/attch28
3/7/94Nancy Marvel
Environmental Protection Agency - Region 9
Terry Kelly
Rogers & Wells
Ltr: Final determination of Miller Brewing Co business confidentiality claim re response to 104(e) request for info, w/determination & mail receipt #P243-067-36329
3/28/94Margaret Felts
CA Environmental Protection Agency - Dept of Toxic Substances Control
Keith Takata
Environmental Protection Agency - Region 9
Ltr: Comments on draft record of decision & responsiveness summary for Baldwin Park operable unit 3/3/9414230
3/31/94Environmental Protection Agency - Region 9-List of recipients of general notice of liability for Baldwin Park operable unit30
3/31/94Felicia Marcus
Environmental Protection Agency - Region 9
-Record of decision (ROD), Baldwin Park OU43
3/31/94Environmental Protection Agency - Region 9-Selected guidance documents for Baldwin Park operable unit administrative record14231
4/5/94Mark Klaiman
Environmental Protection Agency - Region 9
FileMemo: Final determination of Miller Brewing Co business confidentiality claim, docket #09-94-CBI-0114232
6/29/94Margaret May
I C F Kaiser Engineers, Inc
-Data validation rpt: Case #R94S05, memo #2, analysis SAS volatiles, 17 water samples, #SYA251-SYA267, Baldwin Park OU, w/TL 8/25/94 fr S Remaley to W Praskins16661
9/2/94Environmental Protection Agency - Region 9-Selected guidance documents for Baldwin Park OU administrative record22292
11/21/94Mike McIntosh
I C F Kaiser Engineers, Inc
-Data validation rpt: Case #ESB-94-01D, memo #1, analysis nitrite-N & nitrate-N, 5 water samples, #SYC869-SYC871, SYC875 & SYC876, Baldwin Park OU, w/TL 11/21/94 fr M Weiner to W Praskins16651
11/21/94Fernando Contreras
I C F Kaiser Engineers, Inc
-Data validation rpt: Case #ESB-94-01D, memo #2, analysis nitrite-N & nitrate-N, 12 water samples, #SYC872-SYC874 & SYC877-SYC885, Baldwin Park OU, w/TL 11/21/94 fr M Weiner to W Praskins16654
12/15/94Raimi Quiton
I C F Kaiser Engineers, Inc
-Data validation rpt: Case #R94S32, memo #1, analysis SAS volatiles, 17 water samples, #SYC852-SYC868, Baldwin Park OU, w/TL 12/21/94 fr K Hendrix to W Praskins16658
3/1/95Environmental Protection Agency - Region 9-Fact sheet: In major step toward cleanup, EPA identifies sources of groundwater contamination - EPA clears more than 1,500 companies (#16)19855
4/28/95Mitzi Dooley
I C F Kaiser Engineers, Inc
-Data validation rpt: Case #R95S34, memo #1, analysis nitrite-N & nitrate-N, 17 water samples, #SYF208-SYF224, Baldwin Park OU, w/TL 5/2/95 fr K Hendrix to W Praskins16694
6/13/95Camp Dresser & McKee, IncSan Gabriel Basin Water Quality AuthoritySampling & analysis plan (SAP), Baldwin Park OU pre-RD groundwater monitoring program, w/ltr 6/16/95 fr S Rowe to W Praskins19359
6/13/95Camp Dresser & McKee, IncSan Gabriel Basin Water Quality AuthoritySampling & analysis plan (SAP), Baldwin Park OU pre-RD groundwater monitoring program - well location map & preliminary schedule for Baldwin Park OU activities, updated 5/16/95 (attchs only)19360
6/28/95Karen Pettit
I C F Kaiser Engineers, Inc
-Data validation rpt: Case #R95S34, memo #2, analysis volatiles, 17 water samples, #SYF208-SYF224, w/TL 7/7/95 fr K Hendrix to W Praskins19811
8/2/95Barbara Wells
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Notification that subcontractor Thermo Analytical has been selected to perform chemical analyses of samples collected for Baldwin Park OU pre-RD groundwater monitoring program (faxed 8/2/95)33047
11/27/95Wayne Praskins
Environmental Protection Agency - Region 9
Donald Vanderkar
Aerojet General Corp

Baldwin Park OU Steering Committee
Ltr: Request for 2 changes in installation & sampling procedures of Westbay multiport monitoring system24931
3/1/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring wells MW5-03 & MW5-05 well completion rpt, w/TL 3/7/96 fr CDM to W Praskins26767
3/1/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring wells MW5-03 & MW5-05 well completion rpt - Beylik Drilling well MW5-3 & MW5-5 caliper logs (attchs only)26782
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, w/data review, CLP-like data package (laboratory ID L2609 & L2980) & marginalia25462
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-03, date sampled 8/4/95, laboratory project L2326 (attch only)25463
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-03, date sampled 9/25/95-9/26/95, laboratory project L2537 (attch only)25464
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-03, date sampled 9/26/95-9/27/95, laboratory project L2540 (attch only)25465
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-05, date sampled 8/16/95, laboratory project L2363 (attch only)25466
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-05, date sampled 10/12/95-10/13/95, laboratory project L2609 (attch only)25467
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-05 date sampled 10/30/95 & well MW5-17 date sampled 10/30/95, laboratory project L2679 (attch only)25468
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-11, date sampled 10/10/95, laboratory project L2603 (attch only)25469
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-11, date sampled 11/13/95, laboratory project L2734 (attch only)25470
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-17, date sampled 11/30/95, laboratory project L2796 (attch only)25471
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-13, date sampled 1/18/96, laboratory project L2980 (attch only)25472
3/5/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - analytical data tables showing sample_ID, lab_#, param_ID, etc (attch only)25473
3/25/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, submittal of deliverables, w/CLP-like data package for groundwater samples collected 2/15/96 fr well MW5-13 (laboratory ID L3097)26780
5/8/96David Taylor
Environmental Protection Agency - Region 9
Wayne Praskins
Environmental Protection Agency - Region 9
Memo: Review of data validation rpts, deliverables specified in SAP, Baldwin Park OU prepared 3/5/96 by CDM26783
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples, w/table 1, 1st quarterly groundwater sampling lab # cross reference list25475
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9

David Towell
C H 2 M Hill

Donald Vanderkar
Aerojet General Corp

Kelly McTigue
McClintock, Weston, Benshoof, Rochefort, Rubalcava & MacCuish, L L P

Steven Richtel
Waste Management, Inc

Bar
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - memo 6/3/96 fr S Rowe to W Praskins, et al & data tables summarizing lab data according to well # & lab analysis (attchs only) (index record pt 1)25476
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well EPA MW5-01, date sampled 3/11/96, laboratory project L3180 (attchs only)25478
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well EPA MW5-01, date sampled 3/11/96, laboratory project L3181 (attchs only)25480
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well EPA MW5-01, date sampled 3/12/96, laboratory project L3186 (attchs only)25481
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well ALRC MW-4 (AZ-2), date sampled 3/12/96, laboratory project L3187 (attchs only)25482
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well EPA MW5-01, date sampled 3/13/96, laboratory project L3193 (attchs only)25483
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well ALRC MW-3 & MW-9, date sampled 3/13/96, laboratory project L3194 (attchs only)25484
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-11 & MW5-13, date sampled 3/14/96, laboratory project L3202 (attchs only)25485
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well ALRC MW-1R, date sampled 3/14/96, laboratory project L3203 (attchs only)25486
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-17, Norac MW-1, Santa Fe Dam #1, date sampled 3/15/96, laboratory project L3205 (attchs only)25487
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-03, date sampled 3/18/96, laboratory project L3212 (attchs only)25488
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-03, date sampled 3/19/96, laboratory project L3219 (attchs only)25489
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well MW5-05, date sampled 3/20/96, laboratory project L3224 (attchs only)25490
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well VCWD Big Dalton, date sampled 3/22/96, laboratory project L3232 (attchs only)25491
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well VCWD Morada, date sampled 3/26/96, laboratory project L3247 (attchs only)25492
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well Glendora 7G, date sampled 3/27/96, laboratory project L3250 (attchs only)25493
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well SGVWC B6C, B6D & B4B, date sampled 4/2/96, laboratory project L3263 (attchs only)25494
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well Cal/Mat E Curbin & La Puente Valley WD #02, #03 & #04, date sampled 4/10/96, laboratory project L3284 (attchs only)25495
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well VCWD W Maine & Lante, date sampled 4/11/96, laboratory project L3286 (attchs only)25496
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well SWS 139W4, etc, date sampled 4/12/96, laboratory project L3292 (attchs only)25497
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - well LA County key well (#3030F), date sampled 4/19/96, laboratory project L3315 (attchs only)25498
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - analytical data fr GeoSyntec Consultants (attchs only)25499
6/3/96Suzanne Rowe
Camp Dresser & McKee, Inc
Peter Taft
Munger, Tolles & Olson, L L P
Ltr: Baldwin Park OU pre-RD groundwater monitoring program, CLP-like data package for groundwater samples - memo 6/3/96 fr S Rowe to W Praskins, et al & data tables summarizing lab data according to well # & lab analysis (attch only) (index record pt 2)29962
6/17/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/3/9627937
6/19/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/3/9627935
7/8/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Barbara Wells
Camp Dresser & McKee, Inc
Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 3/11/9627933
7/9/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Barbara Wells
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling dates 3/19/96-3/22/96 (pp ommitted fr data packages)27931
7/10/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/13/9628461
7/10/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/13/9628462
7/10/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/17/9628464
7/11/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/18/9628456
7/11/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/25/9628458
7/11/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/17/9628463
7/12/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmits analytical data, data validation rpts, gw elevation data re pre-RD gw monitoring program, w/o attchs27843
7/12/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/19/9628473
7/15/96Weck Laboratories, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/9628441
7/15/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/21/9628460
7/15/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/20/9628467
7/16/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/24/9628454
7/17/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/26/9628471
7/19/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/18/9628455
7/19/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/21/9628459
7/19/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/20/9628466
7/19/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/19/9628472
7/23/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/1/9628443
7/23/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/27/9628447
7/23/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/2/9628449
7/23/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/24/9628453
7/23/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/25/9628457
7/23/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/26/9628470
7/25/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/1/9628442
7/25/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 6/27/9628446
7/25/96Don Burley
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/2/9628448
7/26/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/10/9628469
7/28/96GeoSyntec Consultants, IncBarbara Wells
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, Azusa landfill, pre-RD gw monitoring program, 2nd quarter 199628438
7/31/96Thermo Process Systems, Inc - Thermo Analytical Div-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/12/9628445
8/9/96John Dudek
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/12/9628444
8/9/96John Dudek
Thermo Process Systems, Inc - Thermo Analytical Div
Suzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/10/9628468
8/13/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 8/13/9628452
8/14/96Wayne Praskins
Environmental Protection Agency - Region 9
Donald Vanderkar
Aerojet General Corp

Baldwin Park OU Steering Committee
Ltr: Review of ltr 8/8/96 fr S Rowe requesting variance to Baldwin Park OU SAP & approval of Rowe's request for changes in analytical laboratory & method used to analyze groundwater samples for VOCs (fr EPA method 8021 to EPA method 8260)26678
8/26/96Fahim Rahimi
Stetson Engineers, Inc
Barbara Wells
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 7/9628440
9/3/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 8/13/9628451
9/12/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/12/9628430
9/16/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling dates 9/16/96-9/17/9628432
9/18/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/18/9628434
9/19/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/19/9628436
9/20/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/20/9628196
9/23/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/23/9628199
9/24/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/24/9628204
9/25/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/25/9628209
9/26/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/26/9628211
9/27/96Quantum Chemical Corp-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/27/9628213
9/30/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-11 well completion rpt, w/TL 9/30/96 fr CDM to W Praskins27497
9/30/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-11 well completion rpt - geophysical logs & Beylik drilling log (attchs only)27555
10/1/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/1/9628215
10/7/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/7/9628415
10/8/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/8/9628418
10/9/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/9/9628424
10/11/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/11/9628426
10/17/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/20/9628194
10/17/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/25/9628207
10/17/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/27/9628212
10/17/96Quanterra, Inc-Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/17/9628428
10/17/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling dates 9/16/96-9/17/9628431
10/17/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/18/9628433
10/18/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/19/9628435
10/21/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/1/9628214

10/23/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-17 well completion rpt, w/TL 10/24/96 fr CDM to W Praskins27500
10/23/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-13 well completion rpt, w/TL 10/24/96 fr CDM to W Praskins27501
10/23/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-17 well completion rpt - geophysical logs & Beylik drilling log (attchs only)27558
10/23/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-13 well completion rpt - geophysical logs & Beylik drilling log (attchs only)27559
10/25/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/24/9628201
10/26/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/23/9628198
10/26/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/7/9628410
10/26/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/8/9628417
10/26/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/9/9628423
10/26/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/12/9628429
11/6/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmits analytical data, data validation rpts, gw elevation data re pre-RD gw monitoring program, w/o attchs28437
11/6/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmits analytical data, data validation rpts, gw elevation data re pre-RD gw monitoring program, w/o attchs28450
11/6/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmits analytical data, data validation rpts, gw elevation data re pre-RD gw monitoring program, w/o attchs28465
11/7/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-18 well completion rpt, w/TL 11/7/96 fr CDM to W Praskins27498
11/7/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-15 well completion rpt, w/TL 11/7/96 fr CDM to W Praskins27499
11/7/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-18 well completion rpt - geophysical logs & Beylik drilling log (attchs only)27556
11/7/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-15 well completion rpt - geophysical logs & Beylik drilling log (attchs only)27557
11/7/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 9/26/9628210
11/7/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/11/9628425
11/19/96Quanterra, IncSuzanne Rowe
Camp Dresser & McKee, Inc
TL: Analytical data for Baldwin Park project, pre-RD gw monitoring program, sampling date 10/17/9628427
12/1/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-08 well completion rpt, w/TL 12/31/96 fr CDM to W Praskins29632
12/1/96Camp Dresser & McKee, IncBaldwin Park OU Steering CommitteeDraft pre-RD rpt, Baldwin Park OU pre-RD groundwater monitoring program, w/TL 12/12/96 fr CDM to W Praskins29633
12/1/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, draft pre-RD rpt, appendices C, D & E29634
12/1/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-08 well completion rpt - figure 2-3 & Beylik drilling log (attchs only)29671
12/1/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, draft pre-RD rpt - plates 1-3 (attchs only)29672
12/1/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, draft pre-RD rpt, appendices A & B30890
12/1/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, draft pre-RD rpt, appendix B continued30891
12/1/96Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, draft pre-RD rpt, appendices A & B - wells MW5-08, MW5-11, etc, geophysical logs & well completion details (attchs only)30906
12/16/96Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Transmits analytical data, data validation rpts, gw elevation data re pre-RD gw monitoring program, w/o attchs27939
6/30/97John Kemmerer
Environmental Protection Agency - Region 9
Donald Vanderkar
Aerojet General Corp

Baldwin Park OU Steering Committee
Ltr: Response to extension request in ltr 6/19/97 fr D Gianotti & expression of concern re discovery of perchlorate in Baldwin Park OU32749
8/28/97John Kemmerer
Environmental Protection Agency - Region 9
Baldwin Park OU Steering Committee

Donald Vanderkar
Aerojet General Corp
Ltr: Approval of 2nd extension in deadline for submittal of good faith offer until 2/15/98, Baldwin Park OU41550
9/29/97Harding Lawson AssocBaldwin Park OU Steering CommitteeDraft technology screening for treatability of perchlorate in groundwater, Baldwin Park OU, w/TL to W Praskins fr J Catts41590
10/1/97Harding Lawson AssocBaldwin Park OU Steering CommitteeFinal addendum to sampling & analysis plan (SAP), Baldwin Park OU pre-RD groundwater monitoring program, w/TL to W Praskins41588
2/3/98John Kemmerer
Environmental Protection Agency - Region 9
Donald Vanderkar
Aerojet General Corp

Baldwin Park OU Steering Committee
Ltr: Notification of interim extension in deadline for submittal of good faith offer until 3/15/98, Baldwin Park OU41036
3/11/98Lina Boulos
Montgomery Watson, Inc

Issam Najm
Montgomery Watson, Inc
Michael McGuire
McGuire Environmental Consultants, Inc
Technical memo: Experimental plan for bench-scale testing to evaluate removal of perchlorate fr contaminated San Gabriel Basin groundwater using conventional ion-exchange (IX) processes, w/marginalia47518
3/13/98John Kemmerer
Environmental Protection Agency - Region 9
Baldwin Park OU Steering Committee

Donald Vanderkar
Aerojet General Corp
Ltr: Notification of additional interim extension in deadline for submittal of good faith offer until 4/30/98, Baldwin Park OU41037
4/13/98Donald Vanderkar
Aerojet General Corp
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Results of sampling of monitoring wells for NDMA at Aerojet's Azusa facility41040
4/15/98Wayne Praskins
Environmental Protection Agency - Region 9
Baldwin Park OU Steering Committee

Donald Vanderkar
Aerojet General Corp
Ltr: Acknowledgment of receipt of ltr 4/13/98 fr D Vanderkar confirming detection of NDMA in Aerojet well MW2 & request for immediate submittal of plan to collect & analyze groundwater samples collected fr water supply wells in Baldwin Park OU for NDMA41042
4/24/98Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-23 well completion rpt41026
4/24/98Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-20 well completion rpt41027
4/24/98Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-23 well completion rpt - Beylik drilling log (attch only)41576
4/24/98Camp Dresser & McKee, IncEnvironmental Protection Agency - Region 9Baldwin Park OU pre-RD groundwater monitoring program, monitoring well MW5-20 well completion rpt - Beylik drilling log (attch only)41581
4/28/98Harding Lawson Assoc

Dudek & Assoc, Inc
Baldwin Park OU Steering CommitteeDraft phase 2A well installation & groundwater sampling rpt, Baldwin Park OU pre-RD groundwater monitoring program, w/TL 4/29/98 to W Praskins47508
5/27/98Peter Quinlan
Dudek & Assoc, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Results of laboratory analyses for nitrosodimethylamine (NDMA) conducted on groundwater samples collected on 5/7/98 fr 7 active production wells & notif that Baldwin Park OU Steering Committee intends to resample wells B5A, 140W-4 & Lante, w/attchs40950
7/1/98Suzanne Rowe
Camp Dresser & McKee, Inc
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Notif that CDM's contractor, Quanterra Environmental Services, will no longer provide analytical services in support of Baldwin Park OU groundwater monitoring activities & request that Del Mar Analytical be approved to perform analytical testing48509
7/9/98CA Dept of Health Services-Article: NDMA in California drinking water (last update 7/9/98, downloaded fr CA Dept of Health Services website)48512
7/17/98John Kemmerer
Environmental Protection Agency - Region 9
Baldwin Park OU Steering Committee

Donald Vanderkar
Aerojet General Corp
Ltr: Final extension in deadline for submittal of good faith offer until 7/2/99, Baldwin Park OU40925
10/30/98Calgon Carbon CorpMain San Gabriel Basin WatermasterBig Dalton perchlorate removal pilot study, final rpt46562
1/14/99Harding Lawson Assoc

Dudek & Assoc, Inc
Baldwin Park OU Steering CommitteeDraft addendum to pre-RD rpt dated 9/4/97, Baldwin Park OU pre-RD groundwater monitoring program, w/TL 1/21/99 to W Praskins47352
1/14/99John Catts
Harding Lawson Assoc
Donald Vanderkar
Baldwin Park OU Steering Committee
Technical memo: Phase 2 treatability study progress rpt, La Puente Valley County Water District site, Baldwin Park OU, w/attchs47572
2/12/99Harding Lawson AssocBaldwin Park OU Steering CommitteeFinal phase 2 treatability study workplan, pilot scale groundwater treatment system, Baldwin Park OU48514
3/12/99CA Dept of Health Services-Article: California drinking water standards, action levels & unregulated chemicals requiring monitoring (last update 3/12/99, downloaded fr CA Dept of Health Services website)48513
3/26/99Sanwat Chaudhuri
UT Dept of Health

Howard Okamoto
CA Dept of Health Services

Steven Pia
Environmental Protection Agency - Environmental Research Laboratories
-Inter-agency perchlorate steering committee, analytical subcommittee rpt53518
4/6/99Montgomery Watson, IncMain San Gabriel Basin WatermasterApplication of ion-exchange technology for perchlorate removal fr San Gabriel Basin groundwater, final project rpt47522
4/12/99Harding Lawson AssocBaldwin Park OU Steering CommitteeFinal phase 1 treatability study rpt, perchlorate in groundwater, Baldwin Park OU47502
4/12/99C H 2 M HillEnvironmental Protection Agency - Region 9Draft Baldwin Park OU RA cost estimate summary (faxed 4/12/99, pp 16-19 only)53696
4/13/99US House of Representatives-Article: San Gabriel Basin water quality initiative (HR 910 introduced in House)(downloaded fr Library of Congress website)48510
4/23/99CA Dept of Health Services-Article: Standards for perchlorate in drinking water (last update 4/23/99, downloaded fr CA Dept of Health Services website)48511
5/1/99Environmental Protection Agency - Region 9-Fact sheet: EPA updates cleanup plan for Azusa/Irwindale/Baldwin Park area, including explanation of significant differences (ESD)48544
5/12/99Jacalyn Spiszman
CA Environmental Protection Agency - Dept of Toxic Substances Control
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: CA Dept of Toxic Substances Control's comments on draft explanation of significant differences (ESD) re amendment to Baldwin Park ROD submitted to DTSC on 4/23/9948233
5/27/99David Towell
C H 2 M Hill
Wayne Praskins
Environmental Protection Agency - Region 9
Technical memo: Baldwin Park OU remedy - revised cost estimates w/attached influent estimates48516
6/3/99US Postal Service-Postal Service statement of mailing for Baldwin Park OU explanation of significant differences (ESD), w/pp 1 & 12 of fact sheet 5/9953484
6/11/99San Gabriel Valley Tribune-Newsclip: Explanation of significant differences (ESD) public notice - EPA announces proposed changes to cleanup plan for San Gabriel Valley Superfund site (area 2), Baldwin Park OU50193
6/14/99Michael Berlien
La Puente Valley County Water District
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: La Puente Valley County Water District's comments on proposed changes to cleanup plan for Baldwin Park OU53490
7/2/99Norman Dupont
Shapiro, Mitchell & Dupont, LLP
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Comments of Reichhold Chemicals Inc, OSCO, et al, on Baldwin Park OU explanation of significant differences (ESD) issued by EPA in fact sheet 5/9953487
7/2/99Joel Moskowitz
Moskowitz, Brestoff, Winston & Blinderman, LLP
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Expression of Hartwell Corp's concurrence on comments by N Dupont dated 7/2/99 on behalf of Reichhold Chemicals Inc, OSCO, et al, on Baldwin Park OU explanation of significant differences (ESD) issued by EPA in fact sheet 5/99 (faxed)53493
7/9/99Norman Dupont
Shapiro, Mitchell & Dupont, LLP
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Follow-up to ltr 7/2/99 fr N Dupont re comments of Reichhold Chemicals Inc, OSCO, et al, on Baldwin Park OU explanation of significant differences (ESD) issued by EPA in fact sheet 5/99, w/list of participants53489
9/29/99Norman Dupont
Shapiro, Mitchell & Dupont, LLP
Wayne Praskins
Environmental Protection Agency - Region 9
Ltr: Follow-up to ltr 7/2/99 fr N Dupont re comments of Reichhold Chemicals Inc, OSCO, et al, on Baldwin Park OU explanation of significant differences (ESD) issued by EPA in fact sheet 5/9953503
10/1/99Environmental Protection Agency - National Exposure Research Laboratory-Method 309.0, determination of perchlorate in drinking water using ion chromatography (revision 1.0, draft)53516
11/5/99Wayne Praskins
Environmental Protection Agency - Region 9
Michael Berlien
La Puente Valley County Water District
Ltr: Expression of appreciation for La Puente Valley County Water District's comments 6/14/99 on Baldwin Park OU explanation of significant differences (ESD) issued by EPA in 5/99 & support for efforts to install treatment facilities to remove perchlorate53471
11/5/99Wayne Praskins
Environmental Protection Agency - Region 9

Lewis Maldonado
Environmental Protection Agency - Region 9
Norman Dupont
Shapiro, Mitchell & Dupont, LLP
Ltr: Response to comments in ltrs 7/2/99, 7/9/99 & 9/29/99 fr N Dupont on Baldwin Park OU explanation of significant differences (ESD) issued by EPA in 5/99, w/attch53477

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