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Pacific Southwest, Region 9: Superfund

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

San Fernando Valley (All Areas)

Superfund Site

Technical Document

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Date Title / pdf File
06/01/97 1996 Groundwater Quality Monitoring Report

San Fernando Valley

1996 Groundwater Quality
Monitoring Report
Table of Contents
Title Page title.pdf (38 kb)
(17kb)
Section (Page)
1 Introduction (1-1)
1.1 Setting (1-1)
1.2 Background (1-1)
1.3 Report Organization (1-2)
section1.pdf(11 kb)
2 First, Third and Fourth Quarter 1996 Sampling Events(2-1)
2.1 Description of Activities (2-1)
2.1.1 First Quarter (2-1)
2.1.2 Third Quarter (2-2)
2.1.3 Fourth Quarter (2-2)

2.2 Analytical Results (2-2)
2.2.1 First Quarter (2-2)
2.2.2 Third Quarter (2-3)
2.2.3 Fourth Quarter (2-3)
section2.pdf(19 kb)
3 Discussion of First, Third and Fourth Quarter 1996
Results (3-1)
3.1 Comparison of Water Levels (3-1)
3.2 Comparison of Quarterly Analytical Results (3-1)
3.2.1 TCE Concentrations (3-2)
3.2.2 PCE Concentrations (3-3)
3.2.3 Nitrate (3-3)
3.2.4 Other VOCs (3-4)
3.3 Concentration Contour Maps (3-4)
3.3.1 Interval Selection (3-5)
3.3.2 Estimated Areal Extent (3-5)
3.3.3 Upper Interval (3-6)
3.3.4 Lower Interval (3-7)
section3.pdf (32 kb)
4 Summary of 1996 RI Sampling Program (4-1)
4.1 Quarterly Sampling Activities (4-1)
4.1.1 Description of Activities (4-2)
4.1.2 TCE Concentrations (4-2)
4.1.3 PCE Concentrations (4-2)
4.1.4 Other VOCs (4-2)
4.1.5 Nitrate (4-3)
4.1.6 Other Analytical Parameters (4-3)
4.2 Additional Special Sampling Activities (4-3)
4.2.1 Facility Wells - Hexavalent Chromium Sampling (4-3)
4.2.2 Statistical Evaluation of VOC Data (4-7)
section4.pdf (14 kb)
5 Sampling Program Re-evaluation (5-1)
5.1 Criteria for Re-evaluation (5-1)
5.2 Recommendations (5-2)
section5.pdf (17 kb)
References (R-1) refernce.pdf (7 kb)
(Appendixes are not available for downloading)
Appendix A: RI Monitoring Well Completion Data
Appendix B: Rationale for Selection of Representative
Monitoring Well Data
Appendix C: RI Monitoring Well Submersible Pump
Installation Data
Appendix D: First, Third, and Fourth Quarter
Chain-of-Custody Forms
Appendix E: First, Third and Fourth Quarter Summary of
Detected Compounds
Appendix F: First, Third, and Fourth Quarter Quality
Assurance Sample Data
Appendix G: TCE Contamination in Shallow Zone in 1996
Appendix H: PCE Contamination in Shallow Zone in 1996
Tables (Page)

1-1 Wells Sampled- First, Third and Fourth Quarters-1996
(1-3)
table1-1.pdf (7 kb)
2-1 Groundwater Elevations- First, Third, and Fourth
Quarters-1996 (2-5)
table2-1.pdf (15 kb)
2-2 Final Field Measurements- First, Third and Fourth
Quarters-1996 Sampling Events (2-10)
table2-2.pdf(18 kb)
2-3 Standards for Selected Organic Compounds, Metals, and
Inorganic Compounds (2-14)
table2-3.pdf (29 kb)
2-4 Analytical Methods and Detection Limits for Groundwater
Sample Parameters (2-16)
table2-4.pdf(7 kb)
2-5 Summary of TCE, PCE, and Nitrate- First Quarter
-1996 (2-17)
table2-5.pdf(11 kb)
2-6 Summary of TCE, PCE and Nitrate- Third Quarter-1996
(2-18)
table2-6.pdf(11 kb)
2-7 Summary of TCE, PCE, and Nitrate-Fourth Quarter-1996
(2-19)
table2-7.pdf(11 kb)
2-8 General Water Chemistry-Fourth Quarter-1996 Sampling
Event (2-20)
table2-8.pdf(11 kb)
2-9 Summary of Metals Exceeding MCLs-Fourth
Quarter-1996 (2-22)
table2-9.pdf(6 kb)
3-1 Maximum and Minimum Detected TCE Values-
First Quarter-1996 (3-9)
table3-1.pdf (16 kb)
3-2 Maximum and Minimum Detected TCE
Values-Third Quarter-1996 (3-11)
table3-2.pdf(16 kb)
3-3 Maximum and Minimum Detected TCE Values-
Fourth Quarter-1996 (3-13)
table3-3.pdf (16 kb)
3-4 Maximum and Minimum Detected PCE Values-
First Quarter-1996 (3-15)
table3-4.pdf(16 kb)
3-5 Maximum and Minimum Detected PCE Values-
Third Quarter-1996 (3-17)
table3-5.pdf(15 kb)
3-6 Maximum and Minimum Detected PCE Values-
Fourth Quarter-1996 (3-19)
table3-6.pdf (16 kb)
3-7 Maximum and Minimum Detected Nitrate (as NO3)
Values- First Quarter-1996 (3-21)
table3-7.pdf(16 kb)
3-8 Maximum and Minimum Detected Nitrate (as NO3)
Values- Third Quarter-1996 (3-23)
table3-8.pdf (16 kb)
3-9 Maximum and Minimum Detected Nitrate (as NO3)
Values- Fourth Quarter-1996 (3-25)
table3-9.pdf(16 kb)
3-10 Summary of VOCs Exceeding MCLs- First
Quarter-1996 (3-27)
tabl3-10.pdf(6 kb)
3-11 Summary of VOCs Exceeding MCLs-Third
Quarter-1996 (3-28)
tabl3-11.pdf(6 kb)
3-12 Summary of VOCs Exceeding MCLs-Fourth
Quarter-1996 (3-29)
tabl3-12.pdf (6 kb)
4-1 Summary of TCE Values- First, Third and Fourth
Quarters-1996 (4-11)
table4-1.pdf(12 kb)
4-2 Summary of PCE Values- First, Third and Fourth
Quarters-1996 (4-13)
table4-2.pdf (12 kb)
4-3 Summary of COCs Exceeding MCLs-First, Third,
and Fourth Quarters - 1996 (4-15)
table4-3.pdf(9 kb)
4-4 Summary of Nitrate Values- First, Third and
Fourth Quarters-1996 (4-16)
table4-4.pdf(12 kb)
4-5 Types of Groundwater Quality Data Available,
Facilities with Monitoring Wells in Vicinity of
Subareas 1, 2 and 3 (4-18)
table4-5.pdf(19 kb)
4-6 Total Dissolved and Hexavalent Chromium Results
(ug/L Special Sampling Event No. 4) (4-19)
table4-6.pdf(8 kb)
5-1 Assignment of RI Monitoring Wells1996 Sampling
Program (5-2)
attachment unavailable
5-2 Recommendations for Number of RI Wells 1997
Sampling Frequency (5-3)
attachment unavailable
Figures (Page)

1-1 Site Location Map (1-4)
fig1-1.jpg(2422 kb)
1-2 Location Map of RI Wells (1-5) fig1-2.jpg(167 kb)
3-1 Hydrographs of RI Monitoring Wells (3-30) fig3_1.pdf(622 kb)
3-2 Historical Chemical Concentration of TCE for RI
Monitoring Wells (3-39)
fig3_2.pdf(2002 kb)
3-3 Historical Chemical Concentration of PCE for RI
Monitoring Wells (3-48)
fig3_3.pdf (1965 kb)
3-4 Historical Chemical Concentrations of Nitrate for RI
Monitoring Wells (3-57)
fig3_4.pdf(2313 kb)
3-5 Location of Wells used for Preparing Plume Maps
(3-66)
fig3-5.jpg(163 kb)
3-6 TCE Concentration vs. Difference Between
Water Levels and Top of Screened Interval for RI
Monitoring Wells, Facility Wells, and Production
Wells-1996 (3-67)
fig3-6.jpg(142 kb)
3-7 PCE Concentrations vs. Difference Between
Water Levels and Top of Screened
Interval for RI Monitoring Wells, Facility Wells, and
Production Wells-1996 (3-68)
fig3-7.jpg(142 kb)
3-8 Nitrate as NO3 Concentrations vs. Difference
Between Water Levels and Top of Screened
Interval for RI Monitoring Wells, Facility Wells,
and Production Wells-1996 (3-69)
fig3-8.jpg(151 kb)
3-9 San Fernando Valley Basin, TCE
Contamination in Shallow Zone, 1996 (3-70)
3-10 San Fernando Valley Basin, PCE
Contamination in Shallow Zone, 1996 (3-71)
3-11 San Fernando Valley Basin, N03
Contamination in Shallow Zone, 1996 (3-72)
3-12 San Fernando Valley Basin, TCE
Contamination in Deeper Zone, 1996 (3-73)
3-13 San Fernando Valley Basin, PCE
Contamination in Deeper Zone, 1996 (3-74)
3-14 San Fernando Valley Basin, N03
Contamination in Deeper Zone, 1996 (3-75)
attachments unavailable
4-1 Study Area and Subareas with Location of RI
and Facility Monitoring Wells (4-20)
fig4-1.jpg(274 kb)
4-2 Areas of Detected Chromium Concentrations
(4-21)
fig4-2.jpg(275 kb)
4-3 Areas of Detected Hexavalent Chromium
Concentrations (4-22)
fig4-3.jpg(311 kb)

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