Cities Index.
Agenda packet, second session

Brentwood City Council
February 10, 2026

Document
Agenda packet, second session
Meeting
February 10, 2026
Body
Brentwood City Council
Pages
1,860
Original file
50.4 MB
Text extracted from the city's file for reading and search. Open the original on pub-brentwood.escribemeetings.com. That file is the official record.

TC7818767.2s Page A-16
gned_name=MW-6
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-6&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-6
Well ID: T0601300802-MW-6 Well Type: MONITORING
A12
SE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000126486
gned_name=MW-8
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-8&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-8
Well ID: T0601300802-MW-8 Well Type: MONITORING
A11
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000106091
gned_name=MW-10
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-10&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-10
Well ID: T0601300802-MW-10 Well Type: MONITORING
A10
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000126541
gned_name=MW-3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-3
Well ID: T0601300802-MW-3 Well Type: MONITORING
A9
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000128149
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1322 of 1860 ends

TC7818767.2s Page A-17
gned_name=MW4
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW4&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW4
Well ID: T0601343310-MW4 Well Type: MONITORING
A16
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000072852
gned_name=MW-7
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-7&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-7
Well ID: T0601343310-MW-7 Well Type: MONITORING
A15
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000009644
gned_name=MW-2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-2
Well ID: T0601300802-MW-2 Well Type: MONITORING
A14
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000063117
gned_name=MW-15D
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-15D&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-15D
Well ID: T0601300802-MW-15D Well Type: MONITORING
A13
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000110370
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1323 of 1860 ends

TC7818767.2s Page A-18
gned_name=EW2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=EW2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: EW2
Well ID: T0601343310-EW2 Well Type: MONITORING
A20
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000021930
gned_name=MW-1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-1
Well ID: T0601300802-MW-1 Well Type: MONITORING
A19
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000009639
gned_name=MW2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW2
Well ID: T0601343310-MW2 Well Type: MONITORING
A18
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000103222
gned_name=MW1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW1
Well ID: T0601343310-MW1 Well Type: MONITORING
A17
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000081717
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1324 of 1860 ends

TC7818767.2s Page A-19
gned_name=MW-9D
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-9D&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-9D
Well ID: T0601300802-MW-9D Well Type: MONITORING
A24
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000078955
gned_name=MW3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW3
Well ID: T0601343310-MW3 Well Type: MONITORING
A23
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000017778
gned_name=EW3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=EW3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: EW3
Well ID: T0601343310-EW3 Well Type: MONITORING
A22
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000034298
gned_name=MW-12
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-12&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-12
Well ID: T0601300802-MW-12 Well Type: MONITORING
A21
SE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000136128
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1325 of 1860 ends

TC7818767.2s Page A-20
gned_name=MW-5
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-5&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-5
Well ID: T0601343310-MW-5 Well Type: MONITORING
A28
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000021267
gned_name=MW-6
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-6&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-6
Well ID: T0601343310-MW-6 Well Type: MONITORING
A27
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000054587
gned_name=MW5
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW5&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW5
Well ID: T0601343310-MW5 Well Type: MONITORING
A26
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000054974
gned_name=MW-13
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-13&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-13
Well ID: T0601300802-MW-13 Well Type: MONITORING
A25
SE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000038432
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1326 of 1860 ends

TC7818767.2s Page A-21
gned_name=EW1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=EW1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: EW1
Well ID: T0601343310-EW1 Well Type: MONITORING
A32
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000142646
gned_name=MW-14
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-14&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-14
Well ID: T0601300802-MW-14 Well Type: MONITORING
A31
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000110817
gned_name=MW-17D
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300802&assi date=&global_id=T0601300802&assigned_name=MW-17D&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-17D
Well ID: T0601300802-MW-17D Well Type: MONITORING
A30
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000133157
gned_name=MW-8
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-8&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-8
Well ID: T0601343310-MW-8 Well Type: MONITORING
A29
SSE
1/8 - 1/4 Mile
Higher
CA WELLS CAEDF0000050958
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1327 of 1860 ends

TC7818767.2s Page A-22
gned_name=MW-17
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-17&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-17
Well ID: T0601343310-MW-17 Well Type: MONITORING
B36
ESE
1/4 - 1/2 Mile
Lower
CA WELLS CAEDF0000052985
gned_name=MW-4
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-4&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-4
Well ID: T0601343310-MW-4 Well Type: MONITORING
A35
SSE
1/4 - 1/2 Mile
Higher
CA WELLS CAEDF0000133339
gned_name=MW-12
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-12&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-12
Well ID: T0601343310-MW-12 Well Type: MONITORING
A34
SSE
1/4 - 1/2 Mile
Higher
CA WELLS CAEDF0000120920
gned_name=MW-13
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-13&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-13
Well ID: T0601343310-MW-13 Well Type: MONITORING
33 SE
1/4 - 1/2 Mile
Higher
CA WELLS CAEDF0000044617
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1328 of 1860 ends

TC7818767.2s Page A-23
gned_name=MW-15
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-15&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-15
Well ID: T0601343310-MW-15 Well Type: MONITORING
C40
SE
1/4 - 1/2 Mile
Lower
CA WELLS CAEDF0000099324
gned_name=MW-14
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-14&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-14
Well ID: T0601343310-MW-14 Well Type: MONITORING
39 SE
1/4 - 1/2 Mile
Higher
CA WELLS CAEDF0000130488
gned_name=MW-18
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-18&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-18
Well ID: T0601343310-MW-18 Well Type: MONITORING
C38
ESE
1/4 - 1/2 Mile
Lower
CA WELLS CAEDF0000001871
gned_name=MW-11
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601343310&assi date=&global_id=T0601343310&assigned_name=MW-11&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-11
Well ID: T0601343310-MW-11 Well Type: MONITORING
A37
SSE
1/4 - 1/2 Mile
Higher
CA WELLS CAEDF0000075036
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1329 of 1860 ends

TC7818767.2s Page A-24
gned_name=W-5B
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300744&assi date=&global_id=T0601300744&assigned_name=W-5B&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: W-5B
Well ID: T0601300744-W-5B Well Type: MONITORING
D44
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000037629
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=01N03E18D001M&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DWR&samp_ Other Name: 01N03E18D001M GAMA PFAS Testing: Not Reported Source: Department of Water Resources
Well ID: 01N03E18D001M Well Type: UNK
D43
SSE
1/2 - 1 Mile
Higher
CA WELLS CADWR0000012760
gned_name=W-6
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300744&assi date=&global_id=T0601300744&assigned_name=W-6&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: W-6
Well ID: T0601300744-W-6 Well Type: MONITORING
D42
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000089721
Well Hole Depth Units: ft
Well Depth Units: ft Well Hole Depth: 105
Construction Date: 19660212 Well Depth: 105
Formation Type: Not Reported Aquifer Type: Not Reported Aquifer: Central Valley aquifer system
Contrib Drainage Area: Not Reported Contrib Drainage Area Unts: Not Reported Drainage Area: Not Reported Drainage Area Units: Not Reported Description: Not Reported HUC: 18040003
Monitor Location: 001N002E12K001M Type: Well
Organization Name: USGS California Water Science Center Organization ID: USGS-CA
41 WNW
1/4 - 1/2 Mile
Higher
FED USGS USGS40000186229
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1330 of 1860 ends

TC7818767.2s Page A-25
Comment 5: Not Reported Comment 6: Not Reported
Comment 3: Not Reported Comment 4: Not Reported
Comment 1: Not Reported Comment 2: Not Reported
Precision: 3 Status: AR
Latitude: 375615.0 Longitude: 1214130.0
Source nam: WELL 01 Station ty: WELL/AMBNT/MUN/INTAKE
System no: 0707508 Water type: G
District: 37 User id: 07C
Frds no: 0707508001 County: 07
Seq: 84 Prim sta c: 01N/03E-18D01 M
48 SSE
1/2 - 1 Mile
Higher
CA WELLS 84
gned_name=W-2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300744&assi date=&global_id=T0601300744&assigned_name=W-2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: W-2
Well ID: T0601300744-W-2 Well Type: MONITORING
D47
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000085451
gned_name=W-7B
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300744&assi date=&global_id=T0601300744&assigned_name=W-7B&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: W-7B
Well ID: T0601300744-W-7B Well Type: MONITORING
D46
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000138502
gned_name=W-1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300744&assi date=&global_id=T0601300744&assigned_name=W-1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: W-1
Well ID: T0601300744-W-1 Well Type: MONITORING
D45
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000110174
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1331 of 1860 ends

TC7818767.2s Page A-26
Note: Not Reported
Feet below surface: 28.00 Feet to sea level: Not Reported Ground water levels,Number of Measurements: 1 Level reading date: 1973-07-16 Well Hole Depth Units: ft
Well Depth Units: ft Well Hole Depth: 160
Construction Date: 19730716 Well Depth: 110
Formation Type: Not Reported Aquifer Type: Not Reported Aquifer: Central Valley aquifer system
Contrib Drainage Area: Not Reported Contrib Drainage Area Unts: Not Reported Drainage Area: Not Reported Drainage Area Units: Not Reported Description: Not Reported HUC: 18040003
Monitor Location: 001N002E12G001M Type: Well
Organization Name: USGS California Water Science Center Organization ID: USGS-CA
51 NNW
1/2 - 1 Mile
Higher
FED USGS USGS40000186246
gned_name=W-3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300744&assi date=&global_id=T0601300744&assigned_name=W-3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: W-3
Well ID: T0601300744-W-3 Well Type: MONITORING
D50
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000095898
gned_name=W-4
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300744&assi date=&global_id=T0601300744&assigned_name=W-4&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: W-4
Well ID: T0601300744-W-4 Well Type: MONITORING
D49
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000061384
Area serve: Not Reported
Pop serv: 0 Connection: 0
Zip: Not Reported Zip ext: Not Reported
City: Not Reported State: Not Reported
Hqname: Not Reported Address: Not Reported
System no: 0707508 System nam: Liberty Union High School Comment 7: Not Reported
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1332 of 1860 ends

TC7818767.2s Page A-27
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0707578_002_002&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0707578-002
Well ID: CA0707578_002_002 Well Type: MUNICIPAL
GAMA:

E55
NE
1/2 - 1 Mile
Lower
CA WELLS CADDW2000019438
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0707578_001_003&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0707578-003
Well ID: CA0707578_001_003 Well Type: MUNICIPAL
GAMA:

E54
NE
1/2 - 1 Mile
Lower
CA WELLS CADDW2000005876
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0707578_001_001&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0707578-001
Well ID: CA0707578_001_001 Well Type: MUNICIPAL
GAMA:

E53
NE
1/2 - 1 Mile
Lower
CA WELLS CADDW2000021007
gned_name=W-8
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300744&assi date=&global_id=T0601300744&assigned_name=W-8&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: W-8
Well ID: T0601300744-W-8 Well Type: MONITORING
D52
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000136178
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1333 of 1860 ends

TC7818767.2s Page A-28
Sample date: 24-AUG-17 Finding: 8.7
Dlr: 5.

Chemical: SELENIUM Report units: UG/L
Sample date: 24-AUG-17 Finding: 9.5
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 24-AUG-17 Finding: 890.

Dlr: 0.

Chemical: LANGELIER INDEX @ 60 C Report units: Not Reported Sample date: 24-AUG-17 Finding: 1.3
Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 24-AUG-17 Finding: 13.

Dlr: 3.

Chemical: GROSS ALPHA Report units: PCI/L
Sample date: 24-AUG-17 Finding: 5.8
Area serve: BRENTWOOD
Pop serv: 8255 Connection: 2167
Zip: 94513 Zip ext: Not Reported
City: BRENTWOOD State: Not Reported
Hqname: Not Reported Address: 708 THIRD STREET
System no: 0710004 System nam: City Of Brentwood
Comment 7: Not Reported
Comment 5: Not Reported Comment 6: Not Reported
Comment 3: Not Reported Comment 4: Not Reported
Comment 1: Not Reported Comment 2: Not Reported
Precision: 3 Status: AR
Latitude: 375656.0 Longitude: 1214225.0
Source nam: WELL 07 Station ty: WELL/AMBNT/MUN/INTAKE
System no: 0710004 Water type: G
District: 04 User id: ENG
Frds no: 0710004007 County: 07
Seq: 79 Prim sta c: 01N/03E-06N02 M
57 WNW
1/2 - 1 Mile
Higher
CA WELLS 79
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0707578_002_004&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0707578-004
Well ID: CA0707578_002_004 Well Type: MUNICIPAL
GAMA:

E56
NE
1/2 - 1 Mile
Lower
CA WELLS CADDW2000002254
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1334 of 1860 ends

TC7818767.2s Page A-29
Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 24-AUG-17 Finding: 1400.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 24-AUG-17 Finding: 8.

Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 24-AUG-17 Finding: 210.

Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 24-AUG-17 Finding: 250.

Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 24-AUG-17 Finding: 3.4
Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 24-AUG-17 Finding: 350.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 24-AUG-17 Finding: 80.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 24-AUG-17 Finding: 37.

Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 24-AUG-17 Finding: 160.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 24-AUG-17 Finding: 3.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 24-AUG-17 Finding: 180.

Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 24-AUG-17 Finding: 220.

Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 24-AUG-17 Finding: 0.34
Dlr: 2.

Chemical: ARSENIC Report units: UG/L
Sample date: 24-AUG-17 Finding: 2.4
Dlr: 100.

Chemical: BORON Report units: UG/L
Sample date: 24-AUG-17 Finding: 1500.

Dlr: 3.

Chemical: VANADIUM Report units: UG/L
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1335 of 1860 ends

TC7818767.2s Page A-30
Chemical: SELENIUM Report units: UG/L
Sample date: 31-MAY-16 Finding: 9.

Dlr: 0.

Chemical: GROSS ALPHA COUNTING ERROR Report units: PCI/L Sample date: 31-MAY-16 Finding: 0.21
Dlr: 0.

Chemical: GROSS BETA COUNTING ERROR Report units: PCI/L Sample date: 31-MAY-16 Finding: 1.3
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 31-MAY-16 Finding: 820.

Dlr: 0.

Chemical: LANGELIER INDEX @ 60 C Report units: Not Reported Sample date: 31-MAY-16 Finding: 1.2
Dlr: 0.1
Chemical: TURBIDITY, LABORATORY Report units: NTU
Sample date: 31-MAY-16 Finding: 0.16
Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 31-MAY-16 Finding: 13.

Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 31-MAY-16 Finding: 3.2
Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 31-MAY-16 Finding: 1300.

Dlr: 0.

Chemical: GROSS BETA MDA95 Report units: PCI/L
Sample date: 31-MAY-16 Finding: 1.1
Dlr: 0.

Chemical: GROSS ALPHA COUNTING ERROR Report units: PCI/L Sample date: 24-AUG-17 Finding: 2.

Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 24-AUG-17 Finding: 3.4
Dlr: 4.

Chemical: GROSS BETA Report units: PCI/L
Sample date: 24-AUG-17 Finding: 4.9
Dlr: 0.

Chemical: GROSS BETA COUNTING ERROR Report units: PCI/L Sample date: 24-AUG-17 Finding: 1.2
Dlr: 0.

Chemical: GROSS ALPHA MDA95 Report units: PCI/L
Sample date: 24-AUG-17 Finding: 1.8
Dlr: 0.

Chemical: GROSS BETA MDA95 Report units: PCI/L
Sample date: 24-AUG-17 Finding: 1.1
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1336 of 1860 ends

TC7818767.2s Page A-31
Dlr: 0.

Chemical: GROSS ALPHA MDA95 Report units: PCI/L
Sample date: 31-MAY-16 Finding: 1.4
Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 31-MAY-16 Finding: 7.9
Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 31-MAY-16 Finding: 200.

Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 31-MAY-16 Finding: 240.

Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 31-MAY-16 Finding: 3.2
Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 31-MAY-16 Finding: 340.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 31-MAY-16 Finding: 78.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 31-MAY-16 Finding: 36.

Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 31-MAY-16 Finding: 170.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 31-MAY-16 Finding: 3.3
Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 31-MAY-16 Finding: 170.

Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 31-MAY-16 Finding: 220.

Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 31-MAY-16 Finding: 0.32
Dlr: 100.

Chemical: BORON Report units: UG/L
Sample date: 31-MAY-16 Finding: 1600.

Dlr: 3.

Chemical: VANADIUM Report units: UG/L
Sample date: 31-MAY-16 Finding: 7.5
Dlr: 5.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1337 of 1860 ends

TC7818767.2s Page A-32
Chemical: GROSS ALPHA COUNTING ERROR Report units: PCI/L Sample date: 14-APR-15 Finding: 0.24
Dlr: 3.

Chemical: GROSS ALPHA Report units: PCI/L
Sample date: 14-APR-15 Finding: 5.7
Dlr: 3.

Chemical: VANADIUM Report units: UG/L
Sample date: 14-APR-15 Finding: 9.1
Dlr: 100.

Chemical: BORON Report units: UG/L
Sample date: 14-APR-15 Finding: 1400.

Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 14-APR-15 Finding: 0.33
Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 14-APR-15 Finding: 240.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 14-APR-15 Finding: 190.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 14-APR-15 Finding: 2.9
Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 14-APR-15 Finding: 160.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 14-APR-15 Finding: 35.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 14-APR-15 Finding: 76.

Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 14-APR-15 Finding: 330.

Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 14-APR-15 Finding: 250.

Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 14-APR-15 Finding: 200.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 14-APR-15 Finding: 8.

Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 14-APR-15 Finding: 1400.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1338 of 1860 ends

TC7818767.2s Page A-33
Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 17-JUN-14 Finding: 180.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 17-JUN-14 Finding: 7.7
Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 17-JUN-14 Finding: 1400.

Dlr: 0.

Chemical: GROSS BETA MDA95 Report units: PCI/L
Sample date: 17-JUN-14 Finding: 1.7
Dlr: 0.

Chemical: GROSS ALPHA MDA95 Report units: PCI/L
Sample date: 17-JUN-14 Finding: 2.2
Dlr: 0.

Chemical: GROSS BETA COUNTING ERROR Report units: PCI/L Sample date: 17-JUN-14 Finding: 0.5
Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 17-JUN-14 Finding: 2700.

Dlr: 0.

Chemical: GROSS BETA MDA95 Report units: PCI/L
Sample date: 14-APR-15 Finding: 2.2
Dlr: 0.

Chemical: GROSS ALPHA MDA95 Report units: PCI/L
Sample date: 14-APR-15 Finding: 1.4
Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 14-APR-15 Finding: 3000.

Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 14-APR-15 Finding: 13.

Dlr: 0.1
Chemical: TURBIDITY, LABORATORY Report units: NTU
Sample date: 14-APR-15 Finding: 6.9e-002
Dlr: 0.

Chemical: LANGELIER INDEX @ 60 C Report units: Not Reported Sample date: 14-APR-15 Finding: 1.3
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 14-APR-15 Finding: 900.

Dlr: 0.

Chemical: GROSS BETA COUNTING ERROR Report units: PCI/L Sample date: 14-APR-15 Finding: 2.3
Dlr: 0.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1339 of 1860 ends

TC7818767.2s Page A-34
Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 17-JUN-14 Finding: 12.

Dlr: 0.1
Chemical: TURBIDITY, LABORATORY Report units: NTU
Sample date: 17-JUN-14 Finding: 6.7e-002
Dlr: 0.

Chemical: CARBON DIOXIDE Report units: UG/L
Sample date: 17-JUN-14 Finding: 6900.

Dlr: 0.

Chemical: LANGELIER INDEX @ 60 C Report units: Not Reported Sample date: 17-JUN-14 Finding: 0.89
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 17-JUN-14 Finding: 860.

Dlr: 3.

Chemical: VANADIUM Report units: UG/L
Sample date: 17-JUN-14 Finding: 7.8
Dlr: 100.

Chemical: BORON Report units: UG/L
Sample date: 17-JUN-14 Finding: 1400.

Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 17-JUN-14 Finding: 0.33
Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 17-JUN-14 Finding: 220.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 17-JUN-14 Finding: 200.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 17-JUN-14 Finding: 3.4
Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 17-JUN-14 Finding: 180.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 17-JUN-14 Finding: 34.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 17-JUN-14 Finding: 73.

Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 17-JUN-14 Finding: 320.

Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 17-JUN-14 Finding: 210.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1340 of 1860 ends

TC7818767.2s Page A-35
Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 29-MAY-13 Finding: 180.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 29-MAY-13 Finding: 3.2
Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 29-MAY-13 Finding: 180.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 29-MAY-13 Finding: 36.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 29-MAY-13 Finding: 78.

Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 29-MAY-13 Finding: 340.

Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 29-MAY-13 Finding: 210.

Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 29-MAY-13 Finding: 180.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 29-MAY-13 Finding: 7.8
Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 29-MAY-13 Finding: 1400.

Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 29-MAY-13 Finding: 2900.

Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 29-MAY-13 Finding: 12.

Dlr: 0.1
Chemical: TURBIDITY, LABORATORY Report units: NTU
Sample date: 29-MAY-13 Finding: 0.13
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 29-MAY-13 Finding: 900.

Dlr: 0.

Chemical: GROSS ALPHA COUNTING ERROR Report units: PCI/L Sample date: 17-JUN-14 Finding: 0.8
Dlr: 0.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1341 of 1860 ends

TC7818767.2s Page A-36
Chemical: SELENIUM Report units: UG/L
Sample date: 27-JUN-12 Finding: 9.7
Dlr: 2.

Chemical: ARSENIC Report units: UG/L
Sample date: 27-JUN-12 Finding: 2.5
Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 27-JUN-12 Finding: 0.38
Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 27-JUN-12 Finding: 250.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 27-JUN-12 Finding: 290.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 27-JUN-12 Finding: 3.2
Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 27-JUN-12 Finding: 220.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 27-JUN-12 Finding: 39.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 27-JUN-12 Finding: 82.

Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 27-JUN-12 Finding: 370.

Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 27-JUN-12 Finding: 220.

Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 27-JUN-12 Finding: 180.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 27-JUN-12 Finding: 8.

Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 27-JUN-12 Finding: 1200.

Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 29-MAY-13 Finding: 0.31
Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 29-MAY-13 Finding: 230.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1342 of 1860 ends

TC7818767.2s Page A-37
Area serve: Not Reported
Pop serv: 0 Connection: 0
Zip: Not Reported Zip ext: Not Reported
City: Not Reported State: Not Reported
Hqname: Not Reported Address: Not Reported
System no: 0707578 System nam: Davis Camp
Comment 7: Not Reported
Comment 5: Not Reported Comment 6: Not Reported
Comment 3: Not Reported Comment 4: Not Reported
Comment 1: Not Reported Comment 2: Not Reported
Precision: 3 Status: AR
Latitude: 375713.0 Longitude: 1214143.0
Source nam: WELL 01 Station ty: WELL/AMBNT/MUN/INTAKE
System no: 0707578 Water type: G
District: 37 User id: 07C
Frds no: 0707578001 County: 07
Seq: 81 Prim sta c: 01N/03E-07D01 M
59 North
1/2 - 1 Mile
Lower
CA WELLS 81
gned_name=MW-9
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-9&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-9
Well ID: T0601300804-MW-9 Well Type: MONITORING
F58
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000116651
Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 27-JUN-12 Finding: 1700.

Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 27-JUN-12 Finding: 13.

Dlr: 0.1
Chemical: TURBIDITY, LABORATORY Report units: NTU
Sample date: 27-JUN-12 Finding: 0.13
Dlr: 2.

Chemical: NITRATE (AS NO3) Report units: MG/L
Sample date: 27-JUN-12 Finding: 5.5
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 27-JUN-12 Finding: 1100.

Dlr: 5.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1343 of 1860 ends

TC7818767.2s Page A-38
gned_name=MW-7D
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-7D&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-7D
Well ID: T0601300804-MW-7D Well Type: MONITORING
F63
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000077432
gned_name=MW-7
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-7&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-7
Well ID: T0601300804-MW-7 Well Type: MONITORING
F62
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000140519
gned_name=MW-4
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-4&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-4
Well ID: T0601300804-MW-4 Well Type: MONITORING
F61
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000087534
gned_name=MW-8
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-8&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-8
Well ID: T0601300804-MW-8 Well Type: MONITORING
F60
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000086292
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1344 of 1860 ends

TC7818767.2s Page A-39
Well Depth Units: ft Well Hole Depth: 80
Construction Date: 19780401 Well Depth: 76
Formation Type: Not Reported Aquifer Type: Not Reported Aquifer: Central Valley aquifer system
Contrib Drainage Area: Not Reported Contrib Drainage Area Unts: Not Reported Drainage Area: Not Reported Drainage Area Units: Not Reported Description: Not Reported HUC: 18040003
Monitor Location: 001N002E12N001M Type: Well
Organization Name: USGS California Water Science Center Organization ID: USGS-CA
67 WSW
1/2 - 1 Mile
Higher
FED USGS USGS40000186199
gned_name=MW-16B
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-16B&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-16B
Well ID: T0601300804-MW-16B Well Type: MONITORING
F66
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000007563
gned_name=EW-5
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=EW-5&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: EW-5
Well ID: T0601300804-EW-5 Well Type: MONITORING
F65
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000053906
gned_name=MW-11
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-11&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-11
Well ID: T0601300804-MW-11 Well Type: MONITORING
F64
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000071547
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1345 of 1860 ends

TC7818767.2s Page A-40
date=&global_id=T0601300804&assigned_name=MW-3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-3
Well ID: T0601300804-MW-3 Well Type: MONITORING
F71
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000086734
gned_name=MW-5
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-5&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-5
Well ID: T0601300804-MW-5 Well Type: MONITORING
F70
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000136040
gned_name=EW-6
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=EW-6&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: EW-6
Well ID: T0601300804-EW-6 Well Type: MONITORING
F69
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000045434
gned_name=EW-3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=EW-3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: EW-3
Well ID: T0601300804-EW-3 Well Type: MONITORING
F68
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000077267
Note: Not Reported
Feet below surface: 30.00 Feet to sea level: Not Reported Ground water levels,Number of Measurements: 1 Level reading date: 1978-04-01 Well Hole Depth Units: ft
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1346 of 1860 ends

TC7818767.2s Page A-41
gned_name=MW-17B
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-17B&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-17B
Well ID: T0601300804-MW-17B Well Type: MONITORING
F75
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000039415
gned_name=DW-8
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=DW-8&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: DW-8
Well ID: T0601300783-DW-8 Well Type: MONITORING
G74
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000139462
gned_name=EW-2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=EW-2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: EW-2
Well ID: T0601300804-EW-2 Well Type: MONITORING
F73
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000065043
gned_name=EW-4
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=EW-4&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: EW-4
Well ID: T0601300804-EW-4 Well Type: MONITORING
F72
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000049178
gned_name=MW-3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1347 of 1860 ends

TC7818767.2s Page A-42
gned_name=MW-6
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-6&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-6
Well ID: T0601300804-MW-6 Well Type: MONITORING
H79
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000127074
gned_name=MW-1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-1
Well ID: T0601300804-MW-1 Well Type: MONITORING
F78
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000002642
gned_name=EW-1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=EW-1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: EW-1
Well ID: T0601300804-EW-1 Well Type: MONITORING
F77
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000119466
gned_name=MW-15B
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-15B&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-15B
Well ID: T0601300804-MW-15B Well Type: MONITORING
H76
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000020448
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1348 of 1860 ends

TC7818767.2s Page A-43
gned_name=DW-7
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=DW-7&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: DW-7
Well ID: T0601300783-DW-7 Well Type: MONITORING
G83
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000062600
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=01N02E13H001M&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DWR&samp_ Other Name: 01N02E13H001M GAMA PFAS Testing: Not Reported Source: Department of Water Resources
Well ID: 01N02E13H001M Well Type: UNK
H82
South
1/2 - 1 Mile
Higher
CA WELLS CADWR0000020625
gned_name=MW-13
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-13&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-13
Well ID: T0601300783-MW-13 Well Type: MONITORING
I81
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000035261
gned_name=MW-6D
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-6D&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-6D
Well ID: T0601300804-MW-6D Well Type: MONITORING
H80
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000107102
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1349 of 1860 ends

TC7818767.2s Page A-44
gned_name=MW-2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-2
Well ID: T0601300783-MW-2 Well Type: MONITORING
I87
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000069356
gned_name=MW-7
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-7&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-7
Well ID: T0601300783-MW-7 Well Type: MONITORING
I86
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000084649
gned_name=MW-12
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-12&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-12
Well ID: T0601300783-MW-12 Well Type: MONITORING
G85
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000128258
gned_name=MW-2A
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-2A&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-2A
Well ID: T0601300804-MW-2A Well Type: MONITORING
F84
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000051570
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1350 of 1860 ends

TC7818767.2s Page A-45
gned_name=DW-1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=DW-1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: DW-1
Well ID: T0601300783-DW-1 Well Type: MONITORING
I91
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000036895
Well Hole Depth Units: ft
Well Depth Units: ft Well Hole Depth: 155
Construction Date: 19660228 Well Depth: 145
Formation Type: Alluvial Fan Deposits Aquifer Type: Not Reported Aquifer: Central Valley aquifer system
Contrib Drainage Area: Not Reported Contrib Drainage Area Unts: Not Reported Drainage Area: Not Reported Drainage Area Units: Not Reported Description: Not Reported HUC: 18040003
Monitor Location: 001N002E13H001M Type: Well
Organization Name: USGS California Water Science Center Organization ID: USGS-CA
H90
South
1/2 - 1 Mile
Higher
FED USGS USGS40000186165
gned_name=MW-11
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-11&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-11
Well ID: T0601300783-MW-11 Well Type: MONITORING
G89
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000056666
gned_name=MW-1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-1
Well ID: T0601300783-MW-1 Well Type: MONITORING
I88
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000124660
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1351 of 1860 ends

TC7818767.2s Page A-46
gned_name=MW-4
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-4&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-4
Well ID: T0601300783-MW-4 Well Type: MONITORING
I95
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000140964
gned_name=DW-2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=DW-2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: DW-2
Well ID: T0601300783-DW-2 Well Type: MONITORING
I94
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000136319
gned_name=SVE-1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=SVE-1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: SVE-1
Well ID: T0601300783-SVE-1 Well Type: MONITORING
I93
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000036833
GeoTracker Data: Not Reported
amp_date=&global_id=&assigned_name=USGS-375601121415201&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=USGSNEW&s Other Name: USGS-375601121415201 GAMA PFAS Testing: Not Reported Source: United States Geological Survey
Well ID: USGS-375601121415201 Well Type: UNK
H92
South
1/2 - 1 Mile
Higher
CA WELLS CAUSGSN00000363
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1352 of 1860 ends

TC7818767.2s Page A-47
gned_name=MW-10
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-10&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-10
Well ID: T0601300783-MW-10 Well Type: MONITORING
I99
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000090761
gned_name=MW-1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601359254&assi date=&global_id=T0601359254&assigned_name=MW-1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-1
Well ID: T0601359254-MW-1 Well Type: MONITORING
J98
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000103835
gned_name=DW-6
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=DW-6&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: DW-6
Well ID: T0601300783-DW-6 Well Type: MONITORING
G97
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000062767
gned_name=SVE-2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=SVE-2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: SVE-2
Well ID: T0601300783-SVE-2 Well Type: MONITORING
I96
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000136693
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1353 of 1860 ends

TC7818767.2s Page A-48
gned_name=DW-3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=DW-3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: DW-3
Well ID: T0601300783-DW-3 Well Type: MONITORING
I103
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000016547
gned_name=MW-3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-3
Well ID: T0601300783-MW-3 Well Type: MONITORING
I102
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000142398
gned_name=MW-13
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-13&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-13
Well ID: T0601300804-MW-13 Well Type: MONITORING
101
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000091894
gned_name=MW-5
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-5&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-5
Well ID: T0601300783-MW-5 Well Type: MONITORING
I100
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000114903
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1354 of 1860 ends

TC7818767.2s Page A-49
gned_name=MW-2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601359254&assi date=&global_id=T0601359254&assigned_name=MW-2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-2
Well ID: T0601359254-MW-2 Well Type: MONITORING
J107
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000063168
gned_name=DW-5
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=DW-5&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: DW-5
Well ID: T0601300783-DW-5 Well Type: MONITORING
G106
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000113207
gned_name=MW-14
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-14&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-14
Well ID: T0601300804-MW-14 Well Type: MONITORING
G105
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000129099
gned_name=MW-10
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-10&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-10
Well ID: T0601300804-MW-10 Well Type: MONITORING
H104
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000092461
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1355 of 1860 ends

TC7818767.2s Page A-50
gned_name=MW-12A
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-12A&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-12A
Well ID: T0601300804-MW-12A Well Type: MONITORING
H111
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000068208
gned_name=MW-3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601359254&assi date=&global_id=T0601359254&assigned_name=MW-3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-3
Well ID: T0601359254-MW-3 Well Type: MONITORING
J110
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000035285
gned_name=MW-6
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-6&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-6
Well ID: T0601300783-MW-6 Well Type: MONITORING
I109
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000020467
gned_name=MW-9
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=MW-9&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-9
Well ID: T0601300783-MW-9 Well Type: MONITORING
I108
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000069899
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1356 of 1860 ends

TC7818767.2s Page A-51
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0710004_004_004&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0710004-004
Well ID: CA0710004_004_004 Well Type: MUNICIPAL
GAMA:

H115
South
1/2 - 1 Mile
Higher
CA WELLS CADDW2000015077
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0710004_003_003&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0710004-003
Well ID: CA0710004_003_003 Well Type: MUNICIPAL
GAMA:

H114
South
1/2 - 1 Mile
Higher
CA WELLS CADDW2000018611
gned_name=MW-12
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300804&assi date=&global_id=T0601300804&assigned_name=MW-12&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW-12
Well ID: T0601300804-MW-12 Well Type: MONITORING
H113
South
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000135363
gned_name=DW-4
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300783&assi date=&global_id=T0601300783&assigned_name=DW-4&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: DW-4
Well ID: T0601300783-DW-4 Well Type: MONITORING
I112
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000005094
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1357 of 1860 ends

TC7818767.2s Page A-52
Source nam: WELL 04 - ABANDONED Station ty: WELL/AMBNT/MUN/INTAKE/SUPPLY System no: 0710004 Water type: G
District: 04 User id: ENG
Frds no: 0710004004 County: 07
Seq: 85 Prim sta c: 01N/03E-18M01 M
K118
SSW
1/2 - 1 Mile
Higher
CA WELLS 85
Area serve: BRENTWOOD
Pop serv: 8255 Connection: 2167
Zip: 94513 Zip ext: Not Reported
City: BRENTWOOD State: Not Reported
Hqname: Not Reported Address: 708 THIRD STREET
System no: 0710004 System nam: City Of Brentwood
Comment 7: Not Reported
Comment 5: Not Reported Comment 6: Not Reported
Comment 3: Not Reported Comment 4: Not Reported
Comment 1: Not Reported Comment 2: Not Reported
Precision: 8 Status: AB
Latitude: 375600.0 Longitude: 1214200.0
Source nam: WELL 03 - ABANDONED Station ty: WELL/AMBNT/MUN/INTAKE/SUPPLY System no: 0710004 Water type: G
District: 04 User id: ENG
Frds no: 0710004003 County: 07
Seq: 69 Prim sta c: 01N/02E-13H01 M
K117
SSW
1/2 - 1 Mile
Higher
CA WELLS 69
Area serve: BRENTWOOD
Pop serv: 8255 Connection: 2167
Zip: 94513 Zip ext: Not Reported
City: BRENTWOOD State: Not Reported
Hqname: Not Reported Address: 708 THIRD STREET
System no: 0710004 System nam: City Of Brentwood
Comment 7: Not Reported
Comment 5: Not Reported Comment 6: Not Reported
Comment 3: Not Reported Comment 4: Not Reported
Comment 1: Not Reported Comment 2: Not Reported
Precision: 8 Status: AB
Latitude: 375600.0 Longitude: 1214200.0
Source nam: WELL 05 - ABANDONED Station ty: WELL/AMBNT/MUN/INTAKE/SUPPLY System no: 0710004 Water type: G
District: 04 User id: ENG
Frds no: 0710004005 County: 07
Seq: 68 Prim sta c: 01N/02E-13F01 M
K116
SSW
1/2 - 1 Mile
Higher
CA WELLS 68
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1358 of 1860 ends

TC7818767.2s Page A-53
System no: 0710004 Water type: G
District: 04 User id: ENG
Frds no: 0710004006 County: 07
Seq: 78 Prim sta c: 01N/03E-06N01 M
L121
NNE
1/2 - 1 Mile
Lower
CA WELLS 78
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0710004_006_006&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0710004-006
Well ID: CA0710004_006_006 Well Type: MUNICIPAL
GAMA:

L120
NNE
1/2 - 1 Mile
Lower
CA WELLS CADDW2000021524
Note: Not Reported
Feet below surface: 22.00 Feet to sea level: Not Reported Ground water levels,Number of Measurements: 1 Level reading date: 1977-01-08 Well Hole Depth Units: ft
Well Depth Units: ft Well Hole Depth: 87
Construction Date: 19770108 Well Depth: 75
Formation Type: Not Reported Aquifer Type: Not Reported Aquifer: Central Valley aquifer system
Contrib Drainage Area: Not Reported Contrib Drainage Area Unts: Not Reported Drainage Area: Not Reported Drainage Area Units: Not Reported Description: Not Reported HUC: 18040003
Monitor Location: 001N002E13D001M Type: Well
Organization Name: USGS California Water Science Center Organization ID: USGS-CA
119
WSW
1/2 - 1 Mile
Higher
FED USGS USGS40000186196
Area serve: BRENTWOOD
Pop serv: 8255 Connection: 2167
Zip: 94513 Zip ext: Not Reported
City: BRENTWOOD State: Not Reported
Hqname: Not Reported Address: 708 THIRD STREET
System no: 0710004 System nam: City Of Brentwood
Comment 7: Not Reported
Comment 5: Not Reported Comment 6: Not Reported
Comment 3: Not Reported Comment 4: Not Reported
Comment 1: Not Reported Comment 2: Not Reported
Precision: 8 Status: AB
Latitude: 375600.0 Longitude: 1214200.0
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1359 of 1860 ends

TC7818767.2s Page A-54
Dlr: 0.

Chemical: GROSS BETA COUNTING ERROR Report units: PCI/L Sample date: 24-AUG-17 Finding: 1.3
Dlr: 4.

Chemical: GROSS BETA Report units: PCI/L
Sample date: 24-AUG-17 Finding: 5.6
Dlr: 0.

Chemical: GROSS ALPHA COUNTING ERROR Report units: PCI/L Sample date: 24-AUG-17 Finding: 1.7
Dlr: 3.

Chemical: GROSS ALPHA Report units: PCI/L
Sample date: 24-AUG-17 Finding: 6.9
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 24-AUG-17 Finding: 1100.

Dlr: 0.

Chemical: LANGELIER INDEX @ 60 C Report units: Not Reported Sample date: 24-AUG-17 Finding: 1.4
Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 24-AUG-17 Finding: 13.

Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 24-AUG-17 Finding: 5.7
Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 24-AUG-17 Finding: 480.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 12-DEC-17 Finding: 237.

Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 13-DEC-17 Finding: 6.4
Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 21-FEB-18 Finding: 5.3
Area serve: BRENTWOOD
Pop serv: 8255 Connection: 2167
Zip: 94513 Zip ext: Not Reported
City: BRENTWOOD State: Not Reported
Hqname: Not Reported Address: 708 THIRD STREET
System no: 0710004 System nam: City Of Brentwood
Comment 7: Not Reported
Comment 5: Not Reported Comment 6: Not Reported
Comment 3: Not Reported Comment 4: Not Reported
Comment 1: Not Reported Comment 2: Not Reported
Precision: 3 Status: AR
Latitude: 375718.0 Longitude: 1214132.0
Source nam: WELL 06 Station ty: WELL/AMBNT/MUN/INTAKE
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1360 of 1860 ends

TC7818767.2s Page A-55
Chemical: BORON Report units: UG/L
Sample date: 24-AUG-17 Finding: 1300.

Dlr: 2.

Chemical: ARSENIC Report units: UG/L
Sample date: 24-AUG-17 Finding: 2.6
Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 24-AUG-17 Finding: 0.35
Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 24-AUG-17 Finding: 290.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 24-AUG-17 Finding: 220.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 24-AUG-17 Finding: 4.1
Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 24-AUG-17 Finding: 180.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 24-AUG-17 Finding: 51.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 24-AUG-17 Finding: 110.

Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 24-AUG-17 Finding: 5.7
Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 24-AUG-17 Finding: 270.

Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 24-AUG-17 Finding: 220.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 24-AUG-17 Finding: 8.

Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 24-AUG-17 Finding: 1700.

Dlr: 0.

Chemical: GROSS BETA MDA95 Report units: PCI/L
Sample date: 24-AUG-17 Finding: 1.2
Dlr: 0.

Chemical: GROSS ALPHA MDA95 Report units: PCI/L
Sample date: 24-AUG-17 Finding: 1.3
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1361 of 1860 ends

TC7818767.2s Page A-56
Dlr: 0.

Chemical: LANGELIER INDEX @ 60 C Report units: Not Reported Sample date: 31-MAY-16 Finding: 1.3
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 31-MAY-16 Finding: 1000.

Dlr: 0.

Chemical: GROSS BETA COUNTING ERROR Report units: PCI/L Sample date: 31-MAY-16 Finding: 1.2
Dlr: 4.

Chemical: GROSS BETA Report units: PCI/L
Sample date: 31-MAY-16 Finding: 4.5
Dlr: 0.

Chemical: GROSS ALPHA COUNTING ERROR Report units: PCI/L Sample date: 31-MAY-16 Finding: 0.24
Dlr: 3.

Chemical: GROSS ALPHA Report units: PCI/L
Sample date: 31-MAY-16 Finding: 5.5
Dlr: 3.

Chemical: VANADIUM Report units: UG/L
Sample date: 31-MAY-16 Finding: 7.2
Dlr: 100.

Chemical: BORON Report units: UG/L
Sample date: 31-MAY-16 Finding: 1400.

Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 14-SEP-16 Finding: 5.4
Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 07-DEC-16 Finding: 5.6
Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 25-JAN-17 Finding: 2.9
Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 10-MAY-17 Finding: 5.8
Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 16-AUG-17 Finding: 6.1
Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 16-AUG-17 Finding: 6.1
Dlr: 3.

Chemical: VANADIUM Report units: UG/L
Sample date: 24-AUG-17 Finding: 8.4
Dlr: 100.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1362 of 1860 ends

TC7818767.2s Page A-57
Chemical: SULFATE Report units: MG/L
Sample date: 31-MAY-16 Finding: 300.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 31-MAY-16 Finding: 220.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 31-MAY-16 Finding: 4.1
Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 31-MAY-16 Finding: 180.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 31-MAY-16 Finding: 52.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 31-MAY-16 Finding: 110.

Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 31-MAY-16 Finding: 490.

Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 31-MAY-16 Finding: 5.7
Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 31-MAY-16 Finding: 260.

Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 31-MAY-16 Finding: 210.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 31-MAY-16 Finding: 7.9
Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 31-MAY-16 Finding: 1600.

Dlr: 0.

Chemical: GROSS BETA MDA95 Report units: PCI/L
Sample date: 31-MAY-16 Finding: 0.99
Dlr: 0.

Chemical: GROSS ALPHA MDA95 Report units: PCI/L
Sample date: 31-MAY-16 Finding: 1.5
Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 31-MAY-16 Finding: 5.7
Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 31-MAY-16 Finding: 13.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1363 of 1860 ends

TC7818767.2s Page A-58
Dlr: 100.

Chemical: BORON Report units: UG/L
Sample date: 14-APR-15 Finding: 1300.

Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 14-APR-15 Finding: 0.35
Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 14-APR-15 Finding: 300.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 14-APR-15 Finding: 230.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 14-APR-15 Finding: 3.9
Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 14-APR-15 Finding: 180.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 14-APR-15 Finding: 51.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 14-APR-15 Finding: 100.

Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 14-APR-15 Finding: 460.

Dlr: 2.

Chemical: NITRATE (AS NO3) Report units: MG/L
Sample date: 13-MAY-15 Finding: 23.6
Dlr: 2.

Chemical: NITRATE (AS NO3) Report units: MG/L
Sample date: 26-AUG-15 Finding: 24.8
Dlr: 2.

Chemical: NITRATE (AS NO3) Report units: MG/L
Sample date: 18-NOV-15 Finding: 9.6
Dlr: 0.4
Chemical: NITRATE (AS N) Report units: MG/L
Sample date: 31-MAR-16 Finding: 5.5
Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 31-MAR-16 Finding: 5.5
Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 31-MAY-16 Finding: 0.33
Dlr: 0.5
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1364 of 1860 ends

TC7818767.2s Page A-59
Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 14-APR-15 Finding: 1600.

Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 14-APR-15 Finding: 220.

Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 14-APR-15 Finding: 260.

Dlr: 0.

Chemical: GROSS BETA MDA95 Report units: PCI/L
Sample date: 14-APR-15 Finding: 1.2
Dlr: 0.

Chemical: GROSS ALPHA MDA95 Report units: PCI/L
Sample date: 14-APR-15 Finding: 1.3
Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 14-APR-15 Finding: 5300.

Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 14-APR-15 Finding: 13.

Dlr: 0.1
Chemical: TURBIDITY, LABORATORY Report units: NTU
Sample date: 14-APR-15 Finding: 6.2e-002
Dlr: 2.

Chemical: NITRATE (AS NO3) Report units: MG/L
Sample date: 14-APR-15 Finding: 23.

Dlr: 0.

Chemical: LANGELIER INDEX @ 60 C Report units: Not Reported Sample date: 14-APR-15 Finding: 1.4
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 14-APR-15 Finding: 1100.

Dlr: 0.

Chemical: GROSS BETA COUNTING ERROR Report units: PCI/L Sample date: 14-APR-15 Finding: 1.4
Dlr: 4.

Chemical: GROSS BETA Report units: PCI/L
Sample date: 14-APR-15 Finding: 6.2
Dlr: 0.

Chemical: GROSS ALPHA COUNTING ERROR Report units: PCI/L Sample date: 14-APR-15 Finding: 0.28
Dlr: 3.

Chemical: GROSS ALPHA Report units: PCI/L
Sample date: 14-APR-15 Finding: 9.6
Dlr: 3.

Chemical: VANADIUM Report units: UG/L
Sample date: 14-APR-15 Finding: 7.9
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1365 of 1860 ends

TC7818767.2s Page A-60
Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 19-JUN-14 Finding: 3.8
Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 19-JUN-14 Finding: 170.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 19-JUN-14 Finding: 50.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 19-JUN-14 Finding: 100.

Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 19-JUN-14 Finding: 460.

Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 19-JUN-14 Finding: 230.

Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 19-JUN-14 Finding: 190.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 19-JUN-14 Finding: 7.8
Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 19-JUN-14 Finding: 1700.

Dlr: 0.

Chemical: GROSS BETA MDA95 Report units: PCI/L
Sample date: 19-JUN-14 Finding: 1.8
Dlr: 0.

Chemical: GROSS ALPHA MDA95 Report units: PCI/L
Sample date: 19-JUN-14 Finding: 2.1
Dlr: 0.

Chemical: GROSS BETA COUNTING ERROR Report units: PCI/L Sample date: 19-JUN-14 Finding: 0.6
Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 19-JUN-14 Finding: 5100.

Dlr: 3.

Chemical: GROSS ALPHA Report units: PCI/L
Sample date: 19-JUN-14 Finding: 6.9
Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 14-APR-15 Finding: 8.

Dlr: 0.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1366 of 1860 ends

TC7818767.2s Page A-61
Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 29-MAY-13 Finding: 210.

Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 29-MAY-13 Finding: 5300.

Dlr: 0.

Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 29-MAY-13 Finding: 1700.

Dlr: 0.

Chemical: GROSS ALPHA COUNTING ERROR Report units: PCI/L Sample date: 19-JUN-14 Finding: 0.9
Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 19-JUN-14 Finding: 13.

Dlr: 0.1
Chemical: TURBIDITY, LABORATORY Report units: NTU
Sample date: 19-JUN-14 Finding: 6.8e-002
Dlr: 0.

Chemical: CARBON DIOXIDE Report units: UG/L
Sample date: 19-JUN-14 Finding: 6000.

Dlr: 2.

Chemical: NITRATE (AS NO3) Report units: MG/L
Sample date: 19-JUN-14 Finding: 23.

Dlr: 0.

Chemical: LANGELIER INDEX @ 60 C Report units: Not Reported Sample date: 19-JUN-14 Finding: 1.2
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 19-JUN-14 Finding: 1100.

Dlr: 3.

Chemical: VANADIUM Report units: UG/L
Sample date: 19-JUN-14 Finding: 8.6
Dlr: 100.

Chemical: BORON Report units: UG/L
Sample date: 19-JUN-14 Finding: 1300.

Dlr: 2.

Chemical: ARSENIC Report units: UG/L
Sample date: 19-JUN-14 Finding: 2.4
Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 19-JUN-14 Finding: 0.34
Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 19-JUN-14 Finding: 290.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 19-JUN-14 Finding: 220.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1367 of 1860 ends

TC7818767.2s Page A-62
Dlr: 0.4
Chemical: NITRATE + NITRITE (AS N) Report units: MG/L
Sample date: 16-MAY-12 Finding: 4100.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 29-MAY-13 Finding: 7.8
Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 29-MAY-13 Finding: 13.

Dlr: 0.1
Chemical: TURBIDITY, LABORATORY Report units: NTU
Sample date: 29-MAY-13 Finding: 0.12
Dlr: 2.

Chemical: NITRATE (AS NO3) Report units: MG/L
Sample date: 29-MAY-13 Finding: 23.

Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 29-MAY-13 Finding: 1100.

Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 29-MAY-13 Finding: 0.32
Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 29-MAY-13 Finding: 300.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 29-MAY-13 Finding: 230.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 29-MAY-13 Finding: 4.

Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 29-MAY-13 Finding: 190.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 29-MAY-13 Finding: 53.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 29-MAY-13 Finding: 110.

Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 29-MAY-13 Finding: 490.

Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 29-MAY-13 Finding: 250.

Dlr: 0.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1368 of 1860 ends

TC7818767.2s Page A-63
Chemical: SPECIFIC CONDUCTANCE Report units: US
Sample date: 16-MAY-12 Finding: 1600.

Dlr: 0.

Chemical: AGGRSSIVE INDEX (CORROSIVITY) Report units: Not Reported Sample date: 16-MAY-12 Finding: 13.

Dlr: 0.1
Chemical: TURBIDITY, LABORATORY Report units: NTU
Sample date: 16-MAY-12 Finding: 0.12
Dlr: 0.

Chemical: TOTAL DISSOLVED SOLIDS Report units: MG/L
Sample date: 16-MAY-12 Finding: 980.

Dlr: 0.1
Chemical: FLUORIDE (F) (NATURAL-SOURCE) Report units: MG/L Sample date: 16-MAY-12 Finding: 0.36
Dlr: 0.5
Chemical: SULFATE Report units: MG/L
Sample date: 16-MAY-12 Finding: 280.

Dlr: 0.

Chemical: CHLORIDE Report units: MG/L
Sample date: 16-MAY-12 Finding: 230.

Dlr: 0.

Chemical: POTASSIUM Report units: MG/L
Sample date: 16-MAY-12 Finding: 3.7
Dlr: 0.

Chemical: SODIUM Report units: MG/L
Sample date: 16-MAY-12 Finding: 170.

Dlr: 0.

Chemical: MAGNESIUM Report units: MG/L
Sample date: 16-MAY-12 Finding: 46.

Dlr: 0.

Chemical: CALCIUM Report units: MG/L
Sample date: 16-MAY-12 Finding: 92.

Dlr: 0.

Chemical: HARDNESS (TOTAL) AS CACO3 Report units: MG/L
Sample date: 16-MAY-12 Finding: 420.

Dlr: 0.

Chemical: CARBONATE ALKALINITY Report units: MG/L
Sample date: 16-MAY-12 Finding: 2.2
Dlr: 0.

Chemical: BICARBONATE ALKALINITY Report units: MG/L
Sample date: 16-MAY-12 Finding: 250.

Dlr: 0.

Chemical: ALKALINITY (TOTAL) AS CACO3 Report units: MG/L Sample date: 16-MAY-12 Finding: 200.

Dlr: 0.

Chemical: PH, LABORATORY Report units: Not Reported
Sample date: 16-MAY-12 Finding: 8.1
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1369 of 1860 ends

TC7818767.2s Page A-64
gned_name=MW7B
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW7B&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW7B
Well ID: T0601300766-MW7B Well Type: MONITORING
M125
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000032561
gned_name=MW3
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW3&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW3
Well ID: T0601300766-MW3 Well Type: MONITORING
M124
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000130652
gned_name=MW6B
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW6B&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW6B
Well ID: T0601300766-MW6B Well Type: MONITORING
M123
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000071625
gned_name=MW6A
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW6A&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW6A
Well ID: T0601300766-MW6A Well Type: MONITORING
M122
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000119508
Dlr: 0.

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1370 of 1860 ends

TC7818767.2s Page A-65
gned_name=MW2
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW2&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW2
Well ID: T0601300766-MW2 Well Type: MONITORING
M129
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000034768
gned_name=MW4
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW4&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW4
Well ID: T0601300766-MW4 Well Type: MONITORING
M128
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000126559
gned_name=IW9
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=IW9&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: IW9
Well ID: T0601300766-IW9 Well Type: MONITORING
M127
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000095441
gned_name=IW10
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=IW10&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: IW10
Well ID: T0601300766-IW10 Well Type: MONITORING
M126
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000124356
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1371 of 1860 ends

TC7818767.2s Page A-66
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=01N03E06N002M&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DWR&samp_ Other Name: 01N03E06N002M GAMA PFAS Testing: Not Reported Source: Department of Water Resources
Well ID: 01N03E06N002M Well Type: UNK
L133
NNE
1/2 - 1 Mile
Lower
CA WELLS CADWR0000034186
gned_name=MW1
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW1&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW1
Well ID: T0601300766-MW1 Well Type: MONITORING
M132
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000135060
gned_name=MW5
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW5&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW5
Well ID: T0601300766-MW5 Well Type: MONITORING
M131
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000092828
gned_name=MW7A
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW7A&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW7A
Well ID: T0601300766-MW7A Well Type: MONITORING
M130
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000003878
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1372 of 1860 ends

TC7818767.2s Page A-67
gned_name=MW8C
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW8C&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW8C
Well ID: T0601300766-MW8C Well Type: MONITORING
M137
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000041892
gned_name=MW8B
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW8B&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW8B
Well ID: T0601300766-MW8B Well Type: MONITORING
M136
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000060131
gned_name=MW8A
GeoTracker Data: https://geotracker.waterboards.ca.gov/profile_report.asp?cmd=MWEDFResults&global_id=T0601300766&assi date=&global_id=T0601300766&assigned_name=MW8A&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=EDF&samp_ GAMA PFAS Testing: Not Reported
Source: EDF Other Name: MW8A
Well ID: T0601300766-MW8A Well Type: MONITORING
M135
SSE
1/2 - 1 Mile
Higher
CA WELLS CAEDF0000021596
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=01N03E06N001M&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DWR&samp_ Other Name: 01N03E06N001M GAMA PFAS Testing: Not Reported Source: Department of Water Resources
Well ID: 01N03E06N001M Well Type: UNK
L134
NNE
1/2 - 1 Mile
Lower
CA WELLS CADWR0000015465
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1373 of 1860 ends

TC7818767.2s Page A-68
Drainage Area: Not Reported Drainage Area Units: Not Reported Description: Not Reported HUC: 18040003
Monitor Location: 001N002E01R002M Type: Well
Organization Name: USGS California Water Science Center Organization ID: USGS-CA
140
North
1/2 - 1 Mile
Higher
FED USGS USGS40000186270
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0710004_007_007&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0710004-007
Well ID: CA0710004_007_007 Well Type: MUNICIPAL
GAMA:
139
NNE
1/2 - 1 Mile
Lower
CA WELLS CADDW2000000186
Enforcement Detail: St Compliance achieved Enforcement Category: Not Reported Enforcemnt FY: 2000 Enforcement Action: 04/04/2000
Violation ID: Not Reported Orig Code: F
Analysis method: Not Reported Analysis result: Not Reported Number of required samples: Not Reported Number of samples taken: Not Reported Major violator: Not Reported Maximum contaminant level: Not Reported Violation period (months): 006 Violation awareness date: Not Reported Violation start date: 070193 Violation end date: 123193 Violation type: Initial Tap Sampling for Pb and Cu
PWS telephone: Not Reported Contaminant: Lead & Copper Rule Violation ID: 94V0001 Violation source ID: Not Reported PWS currently has or had major violation(s) or enforcement: Yes Latitude: 375554 Longitude: 1214140
Population served: Under 101 Persons Treatment: Untreated System state: CA System zip: 94513
System address: LONE TREE WAY System city: BRENTWOOD
System name: LA PALOMA HIGH SCHOOL System address: LIBERTY UNION HIGH SCHOOL Date system deactivated: Not Reported Retail population: 00000060 Activity status: Active Date system activated: 7706
PWS zip: 94513 PWS ID: CA0706013
PWS city: BRENTWOOD PWS state: CA
PWS name: LIBERTY UNION HIGH SCHOOL PWS address: Not Reported PWS ID: CA0706013 PWS type: System Owner/Responsible Party 138
South
1/2 - 1 Mile
Higher
FRDS PWS CA0706013
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1374 of 1860 ends

TC7818767.2s Page A-69
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0710004_024_024&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0710004-024
Well ID: CA0710004_024_024 Well Type: MUNICIPAL
GAMA:
143
NE
1/2 - 1 Mile
Lower
CA WELLS CADDW2000019583
GeoTracker Data: Not Reported
amp_date=&global_id=&assigned_name=USGS-375600121410901&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=USGSNEW&s Other Name: USGS-375600121410901 GAMA PFAS Testing: Not Reported Source: United States Geological Survey
Well ID: USGS-375600121410901 Well Type: UNK
N142
SE
1/2 - 1 Mile
Lower
CA WELLS CAUSGSN00006656
Well Hole Depth Units: ft
Well Depth Units: ft Well Hole Depth: 255
Construction Date: 19651208 Well Depth: 230
Formation Type: Alluvial Fan Deposits Aquifer Type: Not Reported Aquifer: Central Valley aquifer system
Contrib Drainage Area: Not Reported Contrib Drainage Area Unts: Not Reported Drainage Area: Not Reported Drainage Area Units: Not Reported Description: Not Reported HUC: 18040003
Monitor Location: 001N003E18G001M Type: Well
Organization Name: USGS California Water Science Center Organization ID: USGS-CA
N141
SE
1/2 - 1 Mile
Lower
FED USGS USGS40000186163
Well Hole Depth Units: ft
Well Depth Units: ft Well Hole Depth: 164
Construction Date: 19780528 Well Depth: 159
Formation Type: Not Reported Aquifer Type: Not Reported Aquifer: Central Valley aquifer system
Contrib Drainage Area: Not Reported Contrib Drainage Area Unts: Not Reported GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1375 of 1860 ends

TC7818767.2s Page A-70
Well Hole Depth Units: ft
Well Depth Units: ft Well Hole Depth: 180
Construction Date: 19780528 Well Depth: 152
Formation Type: Not Reported Aquifer Type: Not Reported Aquifer: Central Valley aquifer system
Contrib Drainage Area: Not Reported Contrib Drainage Area Unts: Not Reported Drainage Area: Not Reported Drainage Area Units: Not Reported Description: Not Reported HUC: 18040003
Monitor Location: 001N002E01R001M Type: Well
Organization Name: USGS California Water Science Center Organization ID: USGS-CA
146
North
1/2 - 1 Mile
Higher
FED USGS USGS40000186272
GeoTracker Data: Not Reported
date=&global_id=&assigned_name=CA0707557_001_001&store_num= Groundwater Quality Data: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/GamaDataDisplay.asp?dataset=DHS&samp_ GAMA Pfas testing: Not Reported
Source: DDW Other Names: 0707557-001
Well ID: CA0707557_001_001 Well Type: MUNICIPAL
GAMA:
145
SSE
1/2 - 1 Mile
Higher
CA WELLS CADDW2000016696
Well Hole Depth Units: ft
Well Depth Units: ft Well Hole Depth: 300
Construction Date: 19750908 Well Depth: 135
Formation Type: Not Reported Aquifer Type: Not Reported Aquifer: Central Valley aquifer system
Contrib Drainage Area: Not Reported Contrib Drainage Area Unts: Not Reported Drainage Area: Not Reported Drainage Area Units: Not Reported Description: Not Reported HUC: 18040003
Monitor Location: 001N002E13F001M Type: Well
Organization Name: USGS California Water Science Center Organization ID: USGS-CA
144
SW
1/2 - 1 Mile
Higher
FED USGS USGS40000186167
Map ID
Direction
Distance
Elevation Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1376 of 1860 ends

TC7818767.2s Page A-71
OIL_GAS:
4 SSW
1/4 - 1/2 Mile
OIL_GAS CAOG17000007938
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320219 Spud Date: 01/09/1984
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: GPS
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: S7425 Operator Name: Sunset Exploration, Inc.

Lease Name: Bonnickson Well Design: Bonnickson 37-7
Well Type: Dry Gas Well Status: Plugged
API #: 0401320219 Well #: 37-7
OIL_GAS:
3 East
1/4 - 1/2 Mile
OIL_GAS CAOG17000198871
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320246 Spud Date: 04/27/1985
Confidential Well: N Directionally Drilled: Y
Place: Brentwood GIS Source: hud
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: D1710 Operator Name: Dekalb Energy Co.

Lease Name: Brentwood Townsite Well Design: Brentwood Townsite 1 Well Type: Dry Gas Well Status: Plugged
API #: 0401320246 Well #: 1
OIL_GAS:

A2
SE
1/4 - 1/2 Mile
OIL_GAS CAOG17000198860
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320285 Spud Date: 09/02/1988
Confidential Well: N Directionally Drilled: Y
Place: Brentwood GIS Source: hud
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: H5545 Operator Name: Horizon Operating Co.

Lease Name: Brentwood Townsite Well Design: Brentwood Townsite 1 Well Type: Gas Well Status: Plugged
API #: 0401320285 Well #: 1
OIL_GAS:

A1
SE
1/4 - 1/2 Mile
OIL_GAS CAOG17000198859
Map ID
Direction
Distance Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1377 of 1860 ends

TC7818767.2s Page A-72
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: hud
Field Name: Any Field Area Name: Any Area
Operator ID: 01645 Operator Name: Clarion Res. Inc.

Lease Name: Dianda Well Design: Dianda 1
Well Type: Dry Hole Well Status: Plugged
API #: 0401320167 Well #: 1
OIL_GAS:
7 WSW
1/2 - 1 Mile
OIL_GAS CAOG17000007925
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320338 Spud Date: 11/06/1996
Confidential Well: N Directionally Drilled: Y
Place: Brentwood GIS Source: GPS
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: D1805 Operator Name: Delta Sierra Oil & Gas LLC Lease Name: Sciortino Well Design: Sciortino 1-7
Well Type: Dry Gas Well Status: Plugged
API #: 0401320338 Well #: 1-7
OIL_GAS:
6 NE
1/4 - 1/2 Mile
OIL_GAS CAOG17000198865
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320204 Spud Date: 04/27/1983
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: GPS
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: P4733 Operator Name: Production Specialties Company Lease Name: Stolich Well Design: Stolich 35X-7
Well Type: Gas Well Status: Plugged
API #: 0401320204 Well #: 35X-7
OIL_GAS:
5 ENE
1/4 - 1/2 Mile
OIL_GAS CAOG17000198870
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320253 Spud Date: 09/28/1985
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: hud
Field Name: Any Field Area Name: Any Area
Operator Name: Western Continental Operating Company
Operator ID: W1700
Lease Name: NGC-Ghiggeri Well Design: NGC-Ghiggeri 1
Well Type: Dry Hole Well Status: Plugged
API #: 0401320253 Well #: 1
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1378 of 1860 ends

TC7818767.2s Page A-73
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320097 Spud Date: 10/27/1973
Confidential Well: N Directionally Drilled: Y
Place: Brentwood GIS Source: hud
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: C7800 Operator Name: Conoco Inc.

Lease Name: Marsh Creek Unit Well Design: Marsh Creek Unit 2 Well Type: Gas Well Status: Plugged
API #: 0401320097 Well #: 2
OIL_GAS:

C10
North
1/2 - 1 Mile
OIL_GAS CAOG17000198867
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320087 Spud Date: 10/06/1972
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: hud
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: C7800 Operator Name: Conoco Inc.

Lease Name: Marsh Creek Unit Well Design: Marsh Creek Unit 1 Well Type: Dry Gas Well Status: Plugged
API #: 0401320087 Well #: 1
OIL_GAS:

C9
North
1/2 - 1 Mile
OIL_GAS CAOG17000198863
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320198 Spud Date: 04/11/1983
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: GPS
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: V1150 Operator Name: Venoco, LLC
Lease Name: Marsh Creek Unit Well Design: Marsh Creek Unit 2 Well Type: Dry Gas Well Status: Plugged
API #: 0401320198 Well #: 2
OIL_GAS:

B8
NE
1/2 - 1 Mile
OIL_GAS CAOG17000198866
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320167 Spud Date: 11/17/1981
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1379 of 1860 ends

TC7818767.2s Page A-74
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320220 Spud Date: 05/11/1984
Confidential Well: N Directionally Drilled: Y
Place: Brentwood GIS Source: hud
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: C7800 Operator Name: Conoco Inc.

Lease Name: Marsh Creek Unit Well Design: Marsh Creek Unit 3 Well Type: Dry Gas Well Status: Plugged
API #: 0401320220 Well #: 3
OIL_GAS:

D13
NE
1/2 - 1 Mile
OIL_GAS CAOG17000198869
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320195 Spud Date: 10/29/1982
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: GPS
Field Name: Oakley, South, Gas Area Name: Any Area
Operator Name: Arkoma Production Company of California
Operator ID: A3650
Lease Name: Stolich Well Design: Stolich 7-1
Well Type: Dry Gas Well Status: Plugged
API #: 0401320195 Well #: 7-1
OIL_GAS:

B12
NE
1/2 - 1 Mile
OIL_GAS CAOG17000198873
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320206 Spud Date: 04/11/1983
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: GPS
Field Name: Oakley, South, Gas Area Name: Any Area
Operator Name: Arkoma Production Company of California
Operator ID: A3650
Lease Name: Stolich Well Design: Stolich 7-2
Well Type: Dry Gas Well Status: Plugged
API #: 0401320206 Well #: 7-2
OIL_GAS:
11 ENE
1/2 - 1 Mile
OIL_GAS CAOG17000198874
Map ID
Direction
Distance Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1380 of 1860 ends

TC7818767.2s Page A-75
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320207 Spud Date: 05/20/1983
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: GPS
Field Name: Brentwood, East, Gas Area Name: Any Area
Operator Name: Arkoma Production Company of California
Operator ID: A3650
Lease Name: Stolich Well Design: Stolich 7-3
Well Type: Gas Well Status: Plugged
API #: 0401320207 Well #: 7-3
OIL_GAS:
16 East
1/2 - 1 Mile
OIL_GAS CAOG17000056618
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320137 Spud Date: 11/14/1978
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: hud
Field Name: Brentwood, East, Gas Area Name: Any Area
Operator ID: D1710 Operator Name: Dekalb Energy Co.

Lease Name: Bonnickson Well Design: Bonnickson 48-7
Well Type: Dry Gas Well Status: Plugged
API #: 0401320137 Well #: 48-7
OIL_GAS:

E15
ESE
1/2 - 1 Mile
OIL_GAS CAOG17000056616
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320232 Spud Date: 07/07/1984
Confidential Well: N Directionally Drilled: Y
Place: Brentwood GIS Source: GPS
Field Name: Oakley, South, Gas Area Name: Any Area
Operator ID: L0260 Operator Name: Lee and Jane Laird
Lease Name: Marsh Creek Unit Well Design: Marsh Creek Unit 4 Well Type: Dry Gas Well Status: Plugged
API #: 0401320232 Well #: 4
OIL_GAS:

D14
NE
1/2 - 1 Mile
OIL_GAS CAOG17000198872
Map ID
Direction
Distance Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1381 of 1860 ends

TC7818767.2s Page A-76
OIL_GAS:
20 NW
1/2 - 1 Mile
OIL_GAS CAOG17000007927
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320176 Spud Date: 07/05/1981
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: GPS
Field Name: Any Field Area Name: Any Area
Operator ID: C7800 Operator Name: Conoco Inc.

Lease Name: Stolich Well Design: Stolich 1
Well Type: Dry Hole Well Status: Plugged
API #: 0401320176 Well #: 1
OIL_GAS:
19 ENE
1/2 - 1 Mile
OIL_GAS CAOG17000007908
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320230 Spud Date: 04/26/1984
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: hud
Field Name: Any Field Area Name: Any Area
Operator ID: R0625 Operator Name: Reichhold Energy Corp.

Lease Name: S & S Farms Well Design: S & S Farms 12-1
Well Type: Dry Hole Well Status: Plugged
API #: 0401320230 Well #: 12-1
OIL_GAS:
18 NW
1/2 - 1 Mile
OIL_GAS CAOG17000010553
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320141 Spud Date: 01/07/1979
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: hud
Field Name: Brentwood, East, Gas Area Name: Any Area
Operator ID: D1710 Operator Name: Dekalb Energy Co.

Lease Name: Davis Well Design: Davis 52-18
Well Type: Dry Hole Well Status: Plugged
API #: 0401320141 Well #: 52-18
OIL_GAS:

E17
ESE
1/2 - 1 Mile
OIL_GAS CAOG17000056617
Map ID
Direction
Distance Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1382 of 1860 ends

TC7818767.2s Page A-77
Place: Brentwood GIS Source: hud
Field Name: Oakley, South, Gas Area Name: Any Area
Operator Name: Western Continental Operating Company
Operator ID: W1700
Lease Name: NGC-Kysh Well Design: NGC-Kysh 1
Well Type: Dry Gas Well Status: Plugged
API #: 0401320223 Well #: 1
OIL_GAS:
23 NNE
1/2 - 1 Mile
OIL_GAS CAOG17000198861
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320153 Spud Date: 12/31/1979
Confidential Well: N Directionally Drilled: N
Place: Contra Costa County GIS Source: GPS
Field Name: Brentwood, East, Gas Area Name: Any Area
Operator ID: S7425 Operator Name: Sunset Exploration, Inc.

Lease Name: NGC-Nunn Well Design: NGC-Nunn 1
Well Type: Dry Gas Well Status: Idle
API #: 0401320153 Well #: 1
OIL_GAS:

F22
East
1/2 - 1 Mile
OIL_GAS CAOG17000056605
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320224 Spud Date: 02/24/1984
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: GPS
Field Name: Oakley, South, Gas Area Name: Any Area
Operator Name: Arkoma Production Company of California
Operator ID: A3650
Lease Name: Stolich Well Design: Stolich 7-4
Well Type: Gas Well Status: Plugged
API #: 0401320224 Well #: 7-4
OIL_GAS:
21 NE
1/2 - 1 Mile
OIL_GAS CAOG17000198875
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320359 Spud Date: 01/16/2001
Confidential Well: N Directionally Drilled: Y
Place: Brentwood GIS Source: hud
Field Name: Any Field Area Name: Any Area
Operator ID: P4733 Operator Name: Production Specialties Company Lease Name: Disco Inferno Well Design: Disco Inferno 1
Well Type: Dry Gas Well Status: Plugged
API #: 0401320359 Well #: 1
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1383 of 1860 ends

TC7818767.2s Page A-78
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320165 Spud Date: 11/06/1980
Confidential Well: N Directionally Drilled: N
Place: Contra Costa County GIS Source: hud
Field Name: Brentwood, East, Gas Area Name: Any Area
Operator ID: D1710 Operator Name: Dekalb Energy Co.

Lease Name: McLeod Well Design: McLeod 77-7
Well Type: Dry Gas Well Status: Plugged
API #: 0401320165 Well #: 77-7
OIL_GAS:
26 East
1/2 - 1 Mile
OIL_GAS CAOG17000056620
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320208 Spud Date: 05/11/1983
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: hud
Field Name: Oakley, South, Gas Area Name: Any Area
Operator Name: Western Continental Operating Company
Operator ID: W1700
Lease Name: NGC-Nunn Well Design: NGC-Nunn 3
Well Type: Gas Well Status: Plugged
API #: 0401320208 Well #: 3
OIL_GAS:
25 NNE
1/2 - 1 Mile
OIL_GAS CAOG17000198868
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320168 Spud Date: 12/12/1980
Confidential Well: N Directionally Drilled: N
Place: Contra Costa County GIS Source: GPS
Field Name: Brentwood, East, Gas Area Name: Any Area
Operator ID: S7425 Operator Name: Sunset Exploration, Inc.

Lease Name: NGC-Nunn Well Design: NGC-Nunn 2
Well Type: Dry Gas Well Status: Idle
API #: 0401320168 Well #: 2
OIL_GAS:

F24
East
1/2 - 1 Mile
OIL_GAS CAOG17000056606
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320223 Spud Date: 03/01/1984
Confidential Well: N Directionally Drilled: Y
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1384 of 1860 ends

TC7818767.2s Page A-79
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01300251 Spud Date: 03/06/1963
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: hud
Field Name: Any Field Area Name: Any Area
Operator ID: S3100 Operator Name: Shell Western E&P Inc.

Lease Name: Prewett Well Design: Prewett 3-1
Well Type: Dry Hole Well Status: Plugged
API #: 0401300251 Well #: 3-1
OIL_GAS:
29 NNW
1/2 - 1 Mile
OIL_GAS CAOG17000012730
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320092 Spud Date: 12/10/1972
Confidential Well: N Directionally Drilled: N
Place: Brentwood GIS Source: hud
Field Name: Any Field Area Name: Any Area
Operator ID: C7800 Operator Name: Conoco Inc.

Lease Name: Marsh Creek Unit B Well Design: Marsh Creek Unit B 1 Well Type: Dry Hole Well Status: Plugged
API #: 0401320092 Well #: 1
OIL_GAS:

G28
North
1/2 - 1 Mile
OIL_GAS CAOG17000002257
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320205 Spud Date: 04/09/1983
Confidential Well: N Directionally Drilled: Y
Place: Brentwood GIS Source: GPS
Field Name: Oakley, South, Gas Area Name: Any Area
Operator Name: California Resources Production Corporation Operator ID: C0885
Lease Name: NGC-Cesa Well Design: NGC-Cesa 1
Well Type: Dry Gas Well Status: Plugged
API #: 0401320205 Well #: 1
OIL_GAS:

G27
North
1/2 - 1 Mile
OIL_GAS CAOG17000198862
Map ID
Direction
Distance Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1385 of 1860 ends

TC7818767.2s Page A-80
Well Record Request URL: https://filerequest.conservation.ca.gov/WellRecord?api=01320116 Spud Date: 12/01/1977
Confidential Well: N Directionally Drilled: N
Place: Contra Costa County GIS Source: hud
Field Name: Any Field Area Name: Any Area
Operator ID: C7800 Operator Name: Conoco Inc.

Lease Name: Nunn Well Design: Nunn 1
Well Type: Dry Hole Well Status: Plugged
API #: 0401320116 Well #: 1
OIL_GAS:
30 ENE
1/2 - 1 Mile
OIL_GAS CAOG17000003029
Map ID
Direction
Distance Database EDR ID Number
GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS ®

Page 1386 of 1860 ends

TC7818767.2s Page A-81
Basement 0.525 pCi/L 100% 0% 0%
Living Area - 2nd Floor 0.300 pCi/L 100% 0% 0%
Living Area - 1st Floor 0.760 pCi/L 100% 0% 0%
Area Average Activity % <4 pCi/L % 4-20 pCi/L % >20 pCi/L Number of sites tested: 55
Federal Area Radon Information for CONTRA COSTA COUNTY, CA : Zone 3 indoor average level < 2 pCi/L.
: Zone 2 indoor average level >= 2 pCi/L and <= 4 pCi/L.

Note: Zone 1 indoor average level > 4 pCi/L.

Federal EPA Radon Zone for CONTRA COSTA County: 2
94513 5 0
______ ________ ________
Zipcode Num Tests > 4 pCi/L
Radon Test Results
State Database: CA Radon

AREA RADON INFORMATION

GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS
RADON
®

Page 1387 of 1860 ends

TOPOGRAPHIC INFORMATION
USGS 7.5’ Digital Elevation Model (DEM)
Source: United States Geologic Survey
EDR acquired the USGS 7.5’ Digital Elevation Model in 2002 and updated it in 2006. The 7.5 minute DEM corresponds to the USGS 1:24,000- and 1:25,000-scale topographic quadrangle maps. The DEM provides elevation data with consistent elevation units and projection.

Current USGS 7.5 Minute Topographic Map
Source: U.S. Geological Survey

HYDROLOGIC INFORMATION
Flood Zone Data: This data was obtained from the Federal Emergency Management Agency (FEMA). It depicts 100-year and 500-year flood zones as defined by FEMA. It includes the National Flood Hazard Layer (NFHL) which incorporates Flood Insurance Rate Map (FIRM) data and Q3 data from FEMA in areas not covered by NFHL.

Source: FEMA
Telephone: 877-336-2627
Date of Government Version: 2003, 2015
NWI: National Wetlands Inventory. This data, available in select counties across the country, was obtained by EDR in 2002, 2005, 2010 and 2015 from the U.S. Fish and Wildlife Service.

State Wetlands Data: Wetland Inventory
Source: Department of Fish and Wildlife
Telephone: 916-445-0411

HYDROGEOLOGIC INFORMATION
AQUIFLOW Information System R
Source: EDR proprietary database of groundwater flow information EDR has developed the AQUIFLOW Information System (AIS) to provide data on the general direction of groundwater flow at specific points. EDR has reviewed reports submitted to regulatory authorities at select sites and has extracted the date of the report, hydrogeologically determined groundwater flow direction and depth to water table information.

GEOLOGIC INFORMATION
Geologic Age and Rock Stratigraphic Unit
Source: P.G. Schruben, R.E. Arndt and W.J. Bawiec, Geology of the Conterminous U.S. at 1:2,500,000 Scale - A digital representation of the 1974 P.B. King and H.M. Beikman Map, USGS Digital Data Series DDS - 11 (1994).

STATSGO: State Soil Geographic Database
Source: Department of Agriculture, Natural Resources Conservation Service (NRCS) The U.S. Department of Agriculture’s (USDA) Natural Resources Conservation Service (NRCS) leads the national Conservation Soil Survey (NCSS) and is responsible for collecting, storing, maintaining and distributing soil survey information for privately owned lands in the United States. A soil map in a soil survey is a representation of soil patterns in a landscape. Soil maps for STATSGO are compiled by generalizing more detailed (SSURGO) soil survey maps.

SSURGO: Soil Survey Geographic Database
Source: Department of Agriculture, Natural Resources Conservation Service (NRCS) Telephone: 800-672-5559
SSURGO is the most detailed level of mapping done by the Natural Resources Conservation Service, mapping scales generally range from 1:12,000 to 1:63,360. Field mapping methods using national standards are used to construct the soil maps in the Soil Survey Geographic (SSURGO) database. SSURGO digitizing duplicates the original soil survey maps. This level of mapping is designed for use by landowners, townships and county natural resource planning and management.

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LOCAL / REGIONAL WATER AGENCY RECORDS

FEDERAL WATER WELLS
PWS: Public Water Systems
Source: EPA/Office of Drinking Water
Telephone: 202-564-3750
Public Water System data from the Federal Reporting Data System. A PWS is any water system which provides water to at least 25 people for at least 60 days annually. PWSs provide water from wells, rivers and other sources.

PWS ENF: Public Water Systems Violation and Enforcement Data Source: EPA/Office of Drinking Water
Telephone: 202-564-3750
Violation and Enforcement data for Public Water Systems from the Safe Drinking Water Information System (SDWIS) after August 1995. Prior to August 1995, the data came from the Federal Reporting Data System (FRDS).

USGS Water Wells: USGS National Water Inventory System (NWIS) This database contains descriptive information on sites where the USGS collects or has collected data on surface water and/or groundwater. The groundwater data includes information on wells, springs, and other sources of groundwater.

OTHER STATE DATABASE INFORMATION
Groundwater Ambient Monitoring & Assessment Program
State Water Resources Control Board
Telephone: 916-341-5577
The GAMA Program is Californias comprehensive groundwater quality monitoring program. GAMA collects data by testing the untreated, raw water in different types of wells for naturally-occurring and man-made chemicals. The GAMA data includes Domestic, Monitoring and Municipal well types from the following sources, Department of Water Resources, Department of Heath Services, EDF, Agricultural Lands, Lawrence Livermore National Laboratory, Department of Pesticide Regulation, United States Geological Survey, Groundwater Ambient Monitoring and Assessment Program and Local Groundwater Projects.

Water Well Database
Source: Department of Water Resources
Telephone: 916-651-9648
California Drinking Water Quality Database
Source: Department of Public Health
Telephone: 916-324-2319
The database includes all drinking water compliance and special studies monitoring for the state of California since 1984. It consists of over 3,200,000 individual analyses along with well and water system information.

Geothermal Wells Listing
Department of Conservation
Telephone: 916-445-9686
Geothermal well means a well constructed to extract or return water to the ground after it has been used for heating or cooling purposes. Geothermal wells in California (except for wells on federal leases which are administered by the Bureau of Land Management) are permitted, drilled, operated, and permanently sealed and closed (plugged and abandoned) under requirements and procedures administered by the Geothermal Section of the Department of Conservations Geologic Energy Management Division (CalGEM, formerly DOGGR).

California Oil and Gas Well Locations
Source: Dept of Conservation, Geologic Energy Management Division Telephone: 916-323-1779
Oil and Gas well locations in the state.

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California Earthquake Fault Lines
Source: California Division of Mines and Geology
The fault lines displayed on EDR’s Topographic map are digitized quaternary fault lines prepared in 1975 by the United State Geological Survey. Additional information (also from 1975) regarding activity at specific fault lines comes from California’s Preliminary Fault Activity Map prepared by the California Division of Mines and Geology.

RADON
State Database: CA Radon
Source: Department of Public Health
Telephone: 916-210-8558
Radon Database for California
Area Radon Information
Source: USGS
Telephone: 703-356-4020
The National Radon Database has been developed by the U.S. Environmental Protection Agency (USEPA) and is a compilation of the EPA/State Residential Radon Survey and the National Residential Radon Survey.

The study covers the years 1986 - 1992. Where necessary data has been supplemented by information collected at private sources such as universities and research institutions.

EPA Radon Zones
Source: EPA
Telephone: 703-356-4020
Sections 307 & 309 of IRAA directed EPA to list and identify areas of U.S. with the potential for elevated indoor radon levels.

OTHER
Airport Landing Facilities: Private and public use landing facilities Source: Federal Aviation Administration, 800-457-6656
Epicenters: World earthquake epicenters, Richter 5 or greater Source: Department of Commerce, National Oceanic and Atmospheric Administration California Earthquake Fault Lines: The fault lines displayed on EDR’s Topographic map are digitized quaternary fault lines, prepared in 1975 by the United State Geological Survey. Additional information (also from 1975) regarding activity at specific fault lines comes from California’s Preliminary Fault Activity Map prepared by the California Division of Mines and Geology.

STREET AND ADDRESS INFORMATION
© 2015 TomTom North America, Inc. All rights reserved. This material is proprietary and the subject of copyright protection and other intellectual property rights owned by or licensed to Tele Atlas North America, Inc. The use of this material is subject to the terms of a license agreement. You will be held liable for any unauthorized copying or disclosure of this material.

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APPENDIX E

PREVIOUS INVESTIGATION REPORT

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1 24201‐01 Soil Investigation Report.fnl‐10/3/24
3 October 2024
24201‐01
Shravan Sundaram
County Project Manager
Environmental Services Division
Contra Costa County Public Works Department
255 Glacier Drive
Martinez, CA  94553
Subject: Soil Investigation Report, Proposed East County Service Center, Contra Costa County Project # WH429A, Brentwood, California
Dear Mr. Sundaram:

Baseline has prepared this Soil Investigation Report to document the soil sampling and analysis performed at the Proposed East County Service Center (project) located on Technology Way in Brentwood, California, identified by Assessor’s Parcel Numbers: 016‐410‐008, 016‐410‐009, 016‐410‐010, 016‐410‐011, 016‐410‐012, 016‐410‐013 (project site). The County acquired these parcels (totaling 2.83 acres) in 2011 from Gregory Ranch Office Investors LP to improve access to County services for East County residents. Based on our review of historical and recent aerial photos we understand that historical use of the project site and surrounding properties included agricultural uses, and the project site has remained undeveloped land with recent use of the western portion of the project site for construction staging. The entire project site and adjacent areas appear to have been used for growing field/row crops from at least 1949 through the 1990s. Arsenic‐based pesticides were commonly used in agriculture prior to the use organochlorine pesticides (OCPs) which were first introduced into California agriculture in 1944 and reached peak usage in the 1960s.1 Arsenic and OCPs are persistent in the environment, and according to guidelines from the Department for Toxic Substances Control (DTSC), the only pesticide class requiring analyses at agricultural properties are OCPs and the only heavy metal required for routine analyses at agricultural properties is arsenic.2 There are no known hazardous materials release sites on or adjacent to the project site identified on the State Water Resources Control Board’s GeoTracker database. Based on the historical agricultural use of the project site and surrounding properties, Baseline identified the 1 Department of Toxic Substances Control (DTSC), 2008. Interim Guidance for Sampling Agricultural Properties (Third Revision), August 7. 2 Ibid.
- BASID-TNE - ENVIRONME T'ALCON,SULTING

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2 24201‐01 Soil Investigation Report.fnl
potential for agricultural contaminants such as arsenic and OCPs to be present in shallow soil at the project site. Baseline also evaluated soil for other contaminants that are typically required to be tested by landfills for acceptance of soil disposal, including Title 22 Metals, petroleum hydrocarbons, and volatile organic compounds (VOCs). The purpose of the soil investigation was to characterize the chemical quality of shallow soil at the project site and to compare the analytical results to published health‐based screening values for construction workers and for commercial/industrial direct exposure under the assumption that the future land use is a commercial building, and to compare analytical results to hazardous waste disposal thresholds.

SAMPLING AND ANALYSIS ACTIVITIES
On 5 August 2024, Baseline performed soil sampling activities at the project site. Eight borings (B‐1 through B‐8) were advanced to depths of approximately 2 to 2.5 feet below ground surface (bgs) at the project site at the locations shown on Figure 1. The number of borings met (and conservatively exceeded) the frequency of borings recommended in DTSC’s guidelines for evaluation of agricultural land, which recommends four borings for up to three acres.3 The borings were located at approximately even spacing across the project site as there was no reason to suspect that soil quality would vary significantly at any specific locations at the project site. Borings B‐1 and B‐2 were located in the western portion of the project site where the ground surface was observed to be covered with an approximately 6‐inch‐thick layer of gravel, and all other borings were located in areas that appeared undisturbed with mowed dry grass on the ground surface. Soil samples were collected from borings B‐1 and B‐2 at depths of approximately 0.5 to 1.0‐foot (at the soil surface just below the gravel layer) and from 2.0‐2.5 feet bgs. In all other borings soil samples were collected from depths of approximately 0.0‐0.5 feet bgs (at the soil surface) and 1.5‐2.0 feet bgs. The sample depths were selected because agricultural contaminants are typically limited to the near surface soils. Additionally, the sample depths are representative of the 24 to 36 inches of anticipated excavation depths for the project. The samples collected from similar depths in 4 adjacent borings were composited by the laboratory into 4‐point composite samples for analysis of select constituents, as described under Laboratory Analysis below. A total of four 4‐point composite samples (COMP‐1 through COMP‐4) were generated. Samples from borings B‐1 through B‐4 (in the western portion of the Site) were composited together and samples from borings B‐5 through B‐8 (in the eastern portion of the Site) were composited together. Samples COMP‐1 and COMP‐3 represent surface soil from the western and eastern portions, respectively, of the project site. Samples COMP‐2 and COMP‐4 represent slightly deeper soil (from approximately 1.5 to 2 feet below the soil surface) from the western and eastern portions, respectively, of the project site. The surface soil samples from each boring were also analyzed discretely for arsenic and OCPs, and select 3 Department of Toxic Substances Control (DTSC), 2008. Interim Guidance for Sampling Agricultural Properties (Third Revision), August 7.

BASELINE

ENVIRONMENTAL CONSULTING

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3 24201‐01 Soil Investigation Report.fnl
deeper samples were analyzed discretely for OCPs, as described under Laboratory Analysis below.

Sampling Methods
All borings were advanced using a hand auger. Samples were collected from the desired depths by transferring soil cuttings from the hand auger into laboratory supplied glass jars. Samples were sealed, labeled with the project name, date and time of sample collection, sampler’s initials, and unique sample identification, placed in a cooler containing ice, and transported to a State‐certified analytical laboratory under chain‐of‐custody procedures. Excess soil cuttings were used to backfill the borings.

Laboratory Analysis
The surface soil sample from each boring was analyzed for OCPs by Environmental Protection Agency (EPA) Method 8081 and arsenic by EPA Methods 6010B. All 4 composite soil samples were analyzed for Title 22 Metals by EPA Methods 6010B and 7471A; total petroleum hydrocarbons (TPH) as gasoline (TPHg), diesel (TPHd), and motor oil (TPHmo) by EPA Method 8015B; and VOCs by EPA Method 8260B. The deeper samples from borings B4, B‐6, and B‐8 were also analyzed for OCPs based on the detection of elevated concentrations of OCPs (with respect to hazardous waste thresholds) in the shallower samples from these borings, as discussed further under Analytical Results, below.

Based on the total chromium concentrations in samples COMP‐2 through COMP‐4, analysis of soluble chromium was performed on these samples using the Waste Extraction Test (WET) Method for waste classification purpose.

ANALYTICAL RESULTS
The laboratory analytical results are discussed below and the laboratory report is provided in Appendix A. Analytical results for metals are presented in Table 1, and analytical results for OCPs are presented in Table 2. Concentrations of all other analytes including TPHg, TPHd, TPHmo, and VOCs are not presented in tables or discussed further below as these analytes were not detected above laboratory reporting limits with the exception of a very minor concentration of TPHmo (25 milligrams per kilogram [mg/kg]) detected in sample COMP‐1.

The analytical results presented in Tables 1 and 2 are compared to the Environmental Screening Levels (ESLs) for construction worker direct exposure (Construction Worker ESLs) and commercial/industrial direct exposure (Commercial ESLs) established by the San Francisco Bay Regional Water Quality Control Board (Regional Water Board);4 naturally occurring background concentrations for metals; and hazardous waste criteria as defined in California Code of Regulations Title 22, including: comparison of concentrations to Total Threshold Limit 4 Regional Water Board, 2019. Environmental Screening Levels, January.

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ENVIRONMENTAL CONSULTING

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4 24201‐01 Soil Investigation Report.fnl
Concentrations (TTLCs), Solubility Threshold Limit Concentrations (STLCs), Toxicity Characteristic Leaching Procedure (TCLP) thresholds, and trigger levels for soluble metals testing by the WET and TCLP methods.

Metals
Concentrations of arsenic ranging from 8.4 to 11 mg/kg were detected in all of the samples analyzed. The detected concentrations of arsenic exceed the Construction Worker ESL of 0.98 mg/kg and Commercial ESL of 0.31 mg/kg (Table 1). Naturally occurring background concentrations of arsenic commonly exceed ESLs. A master’s thesis document5 previously provided as supplemental information on the Regional Water Board’s website for ESLs indicates that the proposed upper estimate for background arsenic (99th percentile) within undifferentiated flatland soil of the San Francisco Bay Area is 11 mg/kg. Considering that the arsenic concentrations detected in samples from multiple depths across the project site were relatively consistent and were below or equal to the established background arsenic level of 11 mg/kg, it appears that the detected levels of arsenic in soil at the project site are naturally occurring..

Concentrations of total chromium ranging from 44 to 59 mg/kg were detected in all four of the composite samples. The total chromium concentrations exceeded the trigger level for WET Method analysis of 50 mg/kg (10 times the STLC of 5 milligrams per liter [mg/L]) in samples COMP‐2 through and COMP‐4 (59 mg/kg in all three samples). Concentrations of soluble chromium analyzed by the WET Method were not detected above the laboratory reporting limit in samples COMP‐2 through COMP‐4.

Concentrations of all other metals analyzed were either not detected above the laboratory reporting limits or were detected at concentrations below Construction Worker ESLs, Commercial ESL, solubility testing (WET and TCLP) trigger levels, and hazardous waste thresholds.

Organochlorine Pesticides
Concentration of OCPs including 4,4'‐DDD, 4,4'‐DDE, 4,4'‐DDT, toxaphene, and aldrin were detected in the soil samples analyzed (Table 2). The detected concentrations of OCPs were below their respective Commercial ESLs and Construction Worker ESLs. Concentrations of 4,4'‐ DDE which equal or exceed the TTLC of 1,000 micrograms per kilogram (µg/kg) were detected in samples B‐4:0.0‐0.5 (1,000 µg/kg), B‐6:0.0‐0.5 (1,200 µg/kg), and B‐8:0.0‐0.5 (1,100 µg/kg).

The TTLC of 1,000 µg/kg applies to the combined concentrations of 4,4'‐DDD, 4,4'‐DDE, and 5 Duverge, Dylan, 2011. Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Region, December. Available at:
https://www.waterboards.ca.gov/sanfranciscobay/water_issues/available_documents/2011_Arsenic_Background _Duverge.pdf

BASELINE

ENVIRONMENTAL CONSULTING

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4,4'‐DDT, which were 1,270 µg/kg in sample B‐4:0.0‐0.5, 1,449 µg/kg in sample B‐6:0.0‐0.5, and 1,255 µg/kg in sample B‐8:0.0‐0.5.  The detected concentrations of OCPs in all other samples analyzed were below hazardous waste thresholds.

CONCLUSIONS AND RECOMMENDATIONS
Based on the findings discussed above, Baseline provides the following conclusions and recommendations regarding the chemical characterization of shallow soils for human health exposure and off‐site disposal.

Comparison to Commercial ESLs and Construction Worker ESLs The detected concentrations of arsenic exceed the Commercial ESL and Construction Worker ESL; however, the arsenic concentrations appear to be naturally occurring background levels.

No specific handling or disposal requirements are recommended based on the arsenic concentrations other than notifying the contractor of the soil investigation findings so that they can ensure that their workers have appropriate training and take appropriate health and safety precautions. Assuming the project site is developed with no exposed soil surfaces remaining, there would be no risk of exposure to arsenic in soil for future occupants of the project site. No other analytical results exceeded the Commercial and Construction Worker ESLs.

Waste Classifications for Soil Disposal and Re‐Use
Soil excavated from the western, north‐central, and northeastern portions of the project site (areas outside of the yellow boundary shown on Figure 1) should be classified as non‐hazardous waste for off‐site disposal purposes. Soil excavated from these areas could also be re‐used on the project‐site if the soil meets geotechnical requirements.

In the south‐central and southeastern portions of the project site, soil excavated from the ground surface to a depth of 1.5 feet bgs should be classified as California‐hazardous (or non‐ RCRA hazardous6) waste for off‐site disposal purposes based on the  analytical results for OCPs (concentrations of 4,4'‐DDE and the total concentrations of 4,4'‐DDE, 4,4'‐DDD, and 4,4'‐DDT) exceeding California hazardous waste criteria, as presented in Table 2 and on Figure 1.

No other analytical results (including for petroleum hydrocarbons, VOCs, and metals) exceeded hazardous waste criteria. Stockpiling and testing of soil excavated on the project site may be performed prior to off‐site disposal or on‐site re‐use to re‐evaluate the chemical quality and waste classification of the soil. The construction contractor should prepare a Soil Management Plan (SMP) which should outline how they will segregate, manage, test, re‐use, and dispose of soil generated from excavation and grading activities on the project site. The SMP should indicate that if soil exhibiting signs of potential contamination (e.g., staining or odors) is 6 Non‐RCRA hazardous waste refers to hazardous waste as defined under California law (CCR Title 22) which is not defined as hazardous waste under the Federal Resource Conservation and Recovery Act (RCRA).

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ENVIRONMENTAL CONSULTING

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6 24201‐01 Soil Investigation Report.fnl
encountered during construction, the potentially contaminated soil would be segregated and characterized for waste disposal.

Sincerely,
William Scott, PG No. 6104         Cem Atabek
Senior Hydrogeologist          Senior Environmental Engineer

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FIGURE

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24201-01 Figure 1 8/1/240
Figure 1
Boring Locations and Extent of Soil Classified as Hazardous Waste Proposed East County Service Center, Brentwood, California B-4B-3
B-2
B-1 B-5
B-6
B-7B-8
Technology Way
Business Center Drive
N
0 100 Feet
Legend
Boring LocationSite Boundary
Extent of Non-RCRA California-Hazardous Waste fromGround Surface to 1.5 Feet Below Ground Surface A • D
D

BASELINE

ENVIRONMENTAL CONSULTING

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TABLES

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Table 1: Analytical Results for Metals
East County Service CenterBrentwood, CA
Sample ID Boring Location
Sample Depths
(ft bgs)
Sample
Collection
Date
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
WET Chromium
(mg/L)
Cobalt
Copper
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
B‐1:0.5‐1.0 B‐1 0.5‐1.0 8/5/24 ‐‐ 8.4 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐2:0.5‐1.0 B‐2 0.5‐1.0 8/5/24 ‐‐ 9.0 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐3:0.0‐0.5 B‐3 0.0‐0.5 8/5/24 ‐‐ 9.8 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐4:0.0‐0.5 B‐4 0.0‐0.5 8/5/24 ‐‐ 11 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐5:0.0‐0.5 B‐5 0.0‐0.5 8/5/24 ‐‐ 10 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐6:0.0‐0.5 B‐6 0.0‐0.5 8/5/24 ‐‐ 10 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐7:0.0‐0.5 B‐7 0.0‐0.5 8/5/24 ‐‐ 9.5 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐8:0.0‐0.5 B‐8 0.0‐0.5 8/5/24 ‐‐ 9.9 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ COMP‐1B‐1 through B‐4 0.0‐0.5 & 0.5‐1.0* 8/5/24 <3.0 10 220 0.63 <0.50 44 ‐‐ 13 36 10 <0.15 <0.99 44 <3.0 <0.50 <3.0 70 74 COMP‐2B‐1 through B‐4 1.5‐2.0 & 2.0‐2.5* 8/5/24 <2.9 10 260 0.62 <0.49 59 <0.30 16 46 10 <0.17 <0.97 62 <2.9 <0.49 <2.9 84 76 COMP‐3B‐5 through B‐8 0.0‐0.5 8/5/24 <2.9 10 270 0.65 <0.49 59 <0.30 16 46 11 <0.14 <0.98 60 <2.9 <0.49 <2.9 85 82 COMP‐4B‐5 through B‐8 1.5‐2.0 8/5/24 <2.9 9.5 260 0.55 <0.49 59 <0.30 17 46 8.5 0.18 <0.98 65 <2.9 <0.49 <2.9 73 72 Construction Worker Direct Exposure 50 0.98 3,000 27 51 530000 5 NA 28 14,000 160 44 1,800 86 1,700 1,800 3.5 470 110,000 Commercial/Industrial Direct Exposure 160 0.31 220,000 230 1,100 1,800,000 5 NA 350 47,000 320 190 5,800 11,000 5,800 5,800 12 5,800 350,000

0.60 11 4 509 1.3 0.36 122 NA 15 29 24 0.26 1.3 57 0.058 0.80 0.56 112 149 500 500 10,000 75 100 2,500 NA 8,000 2,500 1,000 20 3,500 2,000 100 500 700 2,400 5,000 WET Testing Trigger Level (10 X STLC) 150 50 1,000 7.5 10 50 NA 800 250 50 2.0 3,500 200 10 50 70 240 2,500 15 5.0 100 0.75 1.0 5.0 5.0 80 25 5.0 0.20 350 20 1.0 5.0 7.0 24 250 TCLP Testing Trigger Level (20 X TCLP) NE 100 2,000 NE 20 100 NA NE NE 100 4.0 NE NE 20 100 NE NE NE NE 5.0 100 NE 1.0 5.0 NA NE NE 5.0 0.20 NE NE 1.0 5.0 NE NE NE Notes:Units are mg/kg unless indicated otherwise.

Metals analyzed by Environmental Protection Agency methods 6010B and 7471A for mercury. ‐‐ = not analyzed.

Shaded values indicates concentration equal to or exceeding trigger level for WET solubility analysis. ft bgs = feet below ground surface. <## = compound not identified at or above the laboratory reporting limit of ##. mg/kg = milligram per kilogram. * Samples from borings B‐1 and B‐2 were collected from approximately 0.5‐1.0 and 2.0‐2.5 feet bgs due to the presence of approximately 6‐inches of gravel on the ground surface. mg/L = milligram per liter.

NE = not established.
1 ESLs = Environmental Screening Levels, San Francisco Bay Regional Water Quality Control Board, January 2019. NA = not applicable.2 Background = Average Background Concentrations of Trace and Major Elements in California Soils, Kearney Foundation of Soil Science, March 1996. TTLC = Total Threshold Limit Concentration.3 California and Federal Hazardous Waste [TTLC, STLC and TCLP]  ‐ California Code of Regulations Title 22. STLC = Solubility Threshold Limit Concentration.4 Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Region, Dylan Duverge, December 2011. WET = soluble metals by Waste Extraction Test.5 Indicates ESL for Chromium III as there are no screening levels established for total chromium. TCLP = Toxicity Characteristic Leaching Procedure.

TTLC = Total Threshold Limit Concentration.

Hazardous
Waste
Criteria 3
TCLP Threshold (mg/L)STLC (mg/L)TTLC
ESLs 1
Background 2
8/22/2024
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Table 2: Analytical Results for Organochlorine Pesticides East County Service Center
Brentwood, CA
Sample ID
Sample Depths
(ft bgs) Sample Date 4,4'‐DDD 4,4'‐DDE 4,4'‐DDT
Total DDD+
DDE+DDT Toxaphene Aldrin
B‐1:0.5‐1.0 0.5‐1.0 8/5/24 <5.0 <5.0 <5.0 <5.0 <100 <5.0 B‐2:0.5‐1.0 0.5‐1.0 8/5/24 <5.0 11 <5.0 11 <100 <5.0
B‐3:0.0‐0.5 0.0‐0.5 8/5/24 <5.0 11 <5.0 11 <100 <5.0
B‐4:0.0‐0.5 0.0‐0.5 8/5/24 <5.0 1,000 270 1,270 1,300 6.1 B‐4:1.5‐2.0 1.5‐2.0 8/5/24 <5.0 77 <5.0 77 <100 <5.0
B‐5:0.0‐0.5 0.0‐0.5 8/5/24 <5.0 470 62 532 480 <5.0
B‐6:0.0‐0.5 0.0‐0.5 8/5/24 19 1,200 230 1,449 1,400 18
B‐6:1.5‐2.0 1.5‐2.0 8/5/24 <4.9 90 <4.9 90 <98 <4.9
B‐7:0.0‐0.5 0.0‐0.5 8/5/24 <5.0 15 <5.0 15 <99 <5.0
B‐8:0.0‐0.5 0.0‐0.5 8/5/24 15 1,100 140 1,255 770 <5.0
B‐8:1.5‐2.0 1.5‐2.0 8/5/24 <5.1 28 <5.1 28 <100 <5.1
12,000 8,300 8,500 NA 2,200 150
81,000 57,000 57,000 NA 14,000 1,000
1,000 5,000 1,400
Notes:

Units are micrograms per kilogram.

Samples were analyzed for organochlorine pesticides by U.S. Environmental Protection Agency Method 8081A. <xx = indicates constituent was not identified at or above the laboratory reporting limit of xx Shaded values exceed California Hazardous Waste criteria.

NA = not applicable.
ft bgs = feet below ground surface.

TTLC = Total Threshold Limit Concentration.

Other organochlorine pesticides that are not shown were not detected above laboratory reporting limits. See lab report. 1 ESLs = Environmental Screening Levels, San Francisco Bay Regional Water Quality Control Board, January 2019. 2 The TTLC applys to the combined concentrations of DDD, DDE, and DDT.

ESLs 1
California Hazardous Waste Criteria ‐ TTLC 1,000 2
Commercial/Industrial Direct Exposure
Construction Worker Direct Exposure
8/22/2024
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APPENDIX A
Laboratory Report

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Enthalpy Analytical
931 West Barkley Ave
Orange, CA 92868
(714) 771-6900
enthalpy.com
Lab Job Number : 513507
Report Level : II
Report Date : 08/20/2024
Analytical Report prepared for:

Cem Atabek
Baseline Environmental
388 17th St
Suite 230
Oakland, CA 94612
Project: 24201-01 - East County Service Center
Miguel Gamboa, Project Coordinator
[email protected]
This data package has been reviewed for technical correctness and completeness. Release of this data has been authorized by the Laboratory Manager or the Manager's designee, as verified by the above signature which applies to this PDF file as well as any associated electronic data deliverable files. The results contained in this report meet all requirements of NELAP and pertain only to those samples which were submitted for analysis. This report may be reproduced only in its entirety.

CA ELAP# 1338, NELAP# 4038, SCAQMD LAP# 18LA0518, LACSD ID# 10105 Authorized for release by:
1 of 71

A ALYTICAL

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Sample Summary
Cem Atabek
Baseline
Environmental
388 17th St
Suite 230
Oakland, CA 94612
Lab Job #: 513507
Project No: 24201-01
Location: East County Service Center
Date Received: 08/05/24
Sample ID Lab ID Collected Matrix
B-1: 0.5-1.0 513507-001 08/05/24 11:50 Soil
B-1: 2.0-2.5 513507-002 08/05/24 11:58 Soil
B-2: 0.5-1.0 513507-003 08/05/24 11:10 Soil
B-2: 2.0-2.5 513507-004 08/05/24 11:15 Soil
B-3: 0.0-0.5 513507-005 08/05/24 12:25 Soil
B-3: 1.5-2.0 513507-006 08/05/24 12:32 Soil
B-4: 0.0-0.5 513507-007 08/05/24 12:45 Soil
B-4: 1.5-2.0 513507-008 08/05/24 12:51 Soil
B-5: 0.0-0.5 513507-009 08/05/24 13:16 Soil
B-5: 1.5-2.0 513507-010 08/05/24 13:20 Soil
B-6: 0.0-0.5 513507-011 08/05/24 13:30 Soil
B-6: 1.5-2.0 513507-012 08/05/24 13:35 Soil
B-7: 0.0-0.5 513507-013 08/05/24 14:01 Soil
B-7: 1.5-2.0 513507-014 08/05/24 14:05 Soil
B-8: 0.0-0.5 513507-015 08/05/24 13:47 Soil
B-8: 1.5-2.0 513507-016 08/05/24 13:51 Soil
COMP-1 513507-017 08/05/24 00:00 Soil
COMP-2 513507-018 08/05/24 00:00 Soil
COMP-3 513507-019 08/05/24 00:00 Soil
COMP-4 513507-020 08/05/24 00:00 Soil
2 of 71
HA y

ANALYTICAL

Page 1405 of 1860 ends

Case Narrative
Baseline Environmental
388 17th St
Suite 230
Oakland, CA 94612
Cem Atabek
Lab Job
Number:
513507
Project No: 24201-01
Location: East County Service
Center
Date Received: 08/05/24
This data package contains sample and QC results for eleven soil samples and four four-point soil composites, requested for the above referenced project on 08/06/24. The samples were received cold and intact.

Report revised and reissued on 8-20-24 to include additional 8081 and STLC-Cr results.

TPH-Extractables by GC (EPA 8015M):

No analytical problems were encountered.

Volatile Organics by GC/MS (EPA 8260B):

Low recovery was observed for chlorobenzene in the MSD of COMP-1 (lab # 513507-017); the BS/BSD were within limits. High RPD was observed for a number of analytes in the MS/MSD of COMP-1 (lab # 513507-017); the RPD was acceptable in the BS/BSD, and these analytes were not detected at or above the RL in the associated samples.

No other analytical problems were encountered.

Pesticides (EPA 8081A):

High recoveries were observed for 4,4'-DDD in the MS/MSD for batch 346998; the parent sample was not a project sample, the LCS was within limits, and the associated RPD was within limits.

No other analytical problems were encountered.

Metals (EPA 6010B and EPA 7471A) Soil:

High response was observed for selenium in the CCV analyzed 08/07/24 15:03; affected data was qualified with "b".

Low recoveries were observed for antimony in the MS/MSD for batch 347000; the parent sample was not a project sample, the LCS was within limits, and the associated RPD was within limits.

No other analytical problems were encountered.

Metals (EPA 6010B) WET Leachate:

No analytical problems were encountered.
1 of 1
3 of 71
•
•
•
•
•
•
•
•
•
A

ANALYTICAL

Page 1406 of 1860 ends

Cem Atabek
Baseline Environmental
388 17th St
Suite 230
Oakland, CA 94612
Lab Job #: 513507
Project No: 24201-01
Location: East County Service Center
Date Received: 08/05/24
Sample ID: B-1: 0.5-1.0 Lab ID: 513507-001 Collected: 08/05/24 11:50 Matrix: Soil
513507-001 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 8.4 mg/Kg 0.95
Sample ID: B-2: 0.5-1.0 Lab ID: 513507-003 Collected: 08/05/24 11:10 Matrix: Soil
513507-003 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 9.0 mg/Kg 0.97
Method: EPA 8081A
Prep Method: EPA 3546
4,4'-DDE 11 ug/Kg 5.0
Sample ID: B-3: 0.0-0.5 Lab ID: 513507-005 Collected: 08/05/24 12:25 Matrix: Soil
513507-005 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 9.8 mg/Kg 1.0
Method: EPA 8081A
Prep Method: EPA 3546
4,4'-DDE 11 ug/Kg 5.0
Sample ID: B-4: 0.0-0.5 Lab ID: 513507-007 Collected: 08/05/24 12:45 Matrix: Soil
513507-007 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 11 mg/Kg 0.98
Method: EPA 8081A
Prep Method: EPA 3546
Aldrin 6.1 C ug/Kg 5.0
4,4'-DDE 1,000 ug/Kg 50
4,4'-DDT 270 ug/Kg 5.0
Toxaphene 1,300 ug/Kg 1,000
1 of 5 v44.1
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 4 of 71 HA .P

ANALYTICAL

Page 1407 of 1860 ends

Sample ID: B-4: 1.5-2.0 Lab ID: 513507-008 Collected: 08/05/24 12:51 Matrix: Soil
513507-008 Analyte Result Qual Units RL
Method: EPA 8081A
Prep Method: EPA 3546
4,4'-DDE 77 # ug/Kg 5.0
Sample ID: B-5: 0.0-0.5 Lab ID: 513507-009 Collected: 08/05/24 13:16 Matrix: Soil
513507-009 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 10 mg/Kg 0.99
Method: EPA 8081A
Prep Method: EPA 3546
4,4'-DDE 470 ug/Kg 25
4,4'-DDT 62 ug/Kg 5.0
Toxaphene 480 ug/Kg 100
Sample ID: B-6: 0.0-0.5 Lab ID: 513507-011 Collected: 08/05/24 13:30 Matrix: Soil
513507-011 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 10 mg/Kg 0.99
Method: EPA 8081A
Prep Method: EPA 3546
Aldrin 18 ug/Kg 5.0
4,4'-DDE 1,200 ug/Kg 50
4,4'-DDD 19 C ug/Kg 5.0
4,4'-DDT 230 ug/Kg 5.0
Toxaphene 1,400 ug/Kg 1,000
Sample ID: B-6: 1.5-2.0 Lab ID: 513507-012 Collected: 08/05/24 13:35 Matrix: Soil
513507-012 Analyte Result Qual Units RL
Method: EPA 8081A
Prep Method: EPA 3546
4,4'-DDE 90 # ug/Kg 4.9
2 of 5 v44.1
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 5 of 71 HA .P

ANALYTICAL

Page 1408 of 1860 ends

Sample ID: B-7: 0.0-0.5 Lab ID: 513507-013 Collected: 08/05/24 14:01 Matrix: Soil
513507-013 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 9.5 mg/Kg 0.97
Method: EPA 8081A
Prep Method: EPA 3546
4,4'-DDE 15 C ug/Kg 5.0
Sample ID: B-8: 0.0-0.5 Lab ID: 513507-015 Collected: 08/05/24 13:47 Matrix: Soil
513507-015 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 9.9 mg/Kg 0.95
Method: EPA 8081A
Prep Method: EPA 3546
4,4'-DDE 1,100 ug/Kg 50
4,4'-DDD 15 C ug/Kg 5.0
4,4'-DDT 140 ug/Kg 5.0
Toxaphene 770 ug/Kg 99
Sample ID: B-8: 1.5-2.0 Lab ID: 513507-016 Collected: 08/05/24 13:51 Matrix: Soil
513507-016 Analyte Result Qual Units RL
Method: EPA 8081A
Prep Method: EPA 3546
4,4'-DDE 28 # ug/Kg 5.1
3 of 5 v44.1
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 6 of 71 HA .P

ANALYTICAL

Page 1409 of 1860 ends

Sample ID: COMP-1 Lab ID: 513507-017 Collected: 08/05/24 Matrix: Soil
513507-017 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 10 mg/Kg 0.99
Barium 220 mg/Kg 0.99
Beryllium 0.63 mg/Kg 0.50
Chromium 44 mg/Kg 0.99
Cobalt 13 mg/Kg 0.50
Copper 36 mg/Kg 0.99
Lead 10 mg/Kg 0.99
Nickel 44 mg/Kg 0.99
Vanadium 70 mg/Kg 0.99
Zinc 74 mg/Kg 5.0
Method: EPA 8015M
Prep Method: EPA 3580M
ORO C28-C44 25 mg/Kg 20
Sample ID: COMP-2 Lab ID: 513507-018 Collected: 08/05/24 Matrix: Soil
513507-018 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 10 mg/Kg 0.97
Barium 260 mg/Kg 0.97
Beryllium 0.62 mg/Kg 0.49
Chromium 59 mg/Kg 0.97
Cobalt 16 mg/Kg 0.49
Copper 46 mg/Kg 0.97
Lead 10 mg/Kg 0.97
Nickel 62 mg/Kg 0.97
Vanadium 84 mg/Kg 0.97
Zinc 76 mg/Kg 4.9
4 of 5 v44.1
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 7 of 71 HA .P

ANALYTICAL

Page 1410 of 1860 ends

Sample ID: COMP-3 Lab ID: 513507-019 Collected: 08/05/24 Matrix: Soil
513507-019 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 10 mg/Kg 0.98
Barium 270 mg/Kg 0.98
Beryllium 0.65 mg/Kg 0.49
Chromium 59 mg/Kg 0.98
Cobalt 16 mg/Kg 0.49
Copper 46 mg/Kg 0.98
Lead 11 mg/Kg 0.98
Nickel 60 mg/Kg 0.98
Vanadium 85 mg/Kg 0.98
Zinc 82 mg/Kg 4.9
Sample ID: COMP-4 Lab ID: 513507-020 Collected: 08/05/24 Matrix: Soil
513507-020 Analyte Result Qual Units RL
Method: EPA 6010B
Prep Method: EPA 3050B
Arsenic 9.5 mg/Kg 0.98
Barium 260 mg/Kg 0.98
Beryllium 0.55 mg/Kg 0.49
Chromium 59 mg/Kg 0.98
Cobalt 17 mg/Kg 0.49
Copper 46 mg/Kg 0.98
Lead 8.5 mg/Kg 0.98
Nickel 65 mg/Kg 0.98
Vanadium 73 mg/Kg 0.98
Zinc 72 mg/Kg 4.9
Method: EPA 7471A
Prep Method: METHOD
Mercury 0.18 mg/Kg 0.16
#
CCV drift outside limits; average CCV drift within limits per method requirements
C Presence confirmed, but RPD between columns exceeds 40% 5 of 5 v44.1
Detection Summary
Results for any subcontracted analyses are not included in this summary. Data qualifiers and additional information necessary for the interpretation of the test results are contained in the PDF file and may not be included in this summary. 8 of 71 HA .P

ANALYTICAL

Page 1411 of 1860 ends

9 of 71 \
Baseline Environmental Consulting
388 17th Street, Suite 230
Oakland, CA 94612
Tel: (510) 420-8686
ProJect Number 24201-01 ProJect Name: East County Service Center Samplers: (Signatur~ l~frl,
p'
LAB
NO. Sample ID Date Time Media
B-1:~ r'J,C..-1 ,\l 8/ c;; /24 I :Sn Soil
B-1:......0"'J ,D-i .S' 8/ c; /24 l ~<;~ Soil
B-2: -.o.5 -1 ('j 8/ (' /24 : /) Soil
B-2: M-2.0 - 1... .C, 8/ S /24 ; c; Soil
B-3: 0.0-0.5 s/ C /24 : i{_ Soil
B-3: 1.5-2.0 8/ < /24 12! t~ Soil
8-4: 0.0-0.5 8/ < /24 , , _1,.4-1, Soil
B-4: 1.5-2.0 8/ S /24 1:.:Sf Soil
COMP-1
COMP-2
Relin~u·~ by:
1 ~ atui~e} _
· • ~ v 1 Vfl' ,
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Cont ainers
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0 ;;; 0
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1 1
1 1 1 1 1 1 1 1 1 1 1 1
1 1
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Date/Time
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CHAIN OF CUSTODY RECORD
LAB LOGIN S'°J3S°O--::/
a
.....
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Date/Time Received by: (Sign(\)ll're) -
Received at laboratory with intact Samples conditions Comments:
custody seal Upon Arrival:

Yes No NA Intact On Ice Cold
ECSC Soil COC Page I of I
Turn-Around-Time Standard
-------------
. .
-
- -- --· - -
.
---- - -
..
·--
Laboratory _E_n_th_a_lp=--y=-,----------
Baseline Contact Person Cem Atabek
<t .,, .,,
a ---- 0.. C1J UJ "tJ >-C "' ,-.. - ·u .,, C1J ..... a a o N C ·;:; C1J ,:;;. 0 ..... .....
co :g .,, "tJ a. co 0 0 ,-.. <t u C1J ·u <D <D ai N 0.. 0 v a. :e iii <t a 0 = co UJ 0.. <t <t - ,-.. 0 C1J UJ 0.. ..... 0.. <D N C C1J UJ Notes 0 UJ N 0 co "tJ -~ ,:;;. 'ii, - <D - co ,:;;. !:' C <t C "tJ <: 0 E <t E <t >- C1J C1J 0.. C - E "' :c C1J ..... ·- N :, 0.. 0.. ,:;;. - ,:;;. UJ 1-- -"' co -o' :, UJ a. g -~ ..Q 0 .E UJ 'o -"' g o- - C1J - .,, 0 <t ,:;;. co .,, oii- ' "' u e <t "tJ "' N,:;;. ' ..... "' <t 0 <t , o C u ·c 0 - co J: N "' 0 i~ -q_ 0 0.. - 0.. - 0.. ,:;;. C1J "' > ,:;;. UJ 0 UJ 0.. 0 u -' > > ...:. V, -q 00 a!!: u - 0.. - 1-- co X COMP-1
COMP-2, i.We
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X COMP-1
COMP-2, He+dX COMP-1 COMP-2, MeliL
X COMP-1
COMP-2, ,Mel,i

X X X X
Date/Time Remarks:
~/-5rt't 15~3 /
b/}vt 10: so
Email contact:
[email protected]

Page 1412 of 1860 ends

10 of 71
Baseline Environmental Consulting
388 17th Street, Suite 230
Oakland, CA 94612
Tel: (SlO) 420-8686
~OJect Number 24201-01
IIProJect Name: East County Service Center
r •mplers: (S1gnatu~ /<_-J!iLAB
NO.
p
Sample ID
B-5: 0.0-0.S
B-5: 1.5-2.0
B-6: 0.0-0.5
B-6: 1.5-2.0 B-7: 0.0-0. 5
B-7: 1.5-2.0 B-8: 0.0-0.5
B-8: 1.5-2.0
COMP-3
ICOMP-4
Date Time
1st 'f t24ll~
18/ <; /241.l.:t1.o
1st S- / 24~
fu::S 124113
IB/.,f;__ /24lllf:o1
1st S /24j 14', QJ 1st .h 1241 I J !!J
IBIS t2~.12_'._Sl
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IRelinquisheaby :'{signature)~
Media
Soil Soil Soil Soil
Soil
Soil
II Soil
Soil
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1 1 1 I 1
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CHAIN OF CUSTODY RECORD
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Upon Arrival:

Intact On Ice Cold
Received by: (Signal~)
[Comments:

Page I of I 2-
0 ..... 0 0 - N
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0 ..... ..... <{ 0 <O <O a,' N c.. 0 0 =«> w <{ <{ c.. ..... c.. <O - w 0 w N 0 - <O CX) C -
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Laboratory Enthalpy
Baseline Contact Person Cem Atabek
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COMP-3
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COMP-4,1-+eie
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X X
Remarks: Email contact:
[email protected]

Page 1413 of 1860 ends

11 of 71

SAMPLE RECEIPT CHECKLIST
Section 1: General Info ~ ~~ Date Received: fN, / --..1 '
Login # ~ S t3 ':>lJ-.J Client: ~ l:Nl HALPY
Section 2: Shipping/ Custody
Shipping Info: L
Are custody seals present? ci1:o D Yes cJ;,:f s, where? D on cooler, D on samples, D on package Custody seals intact on arrival? Yes □ No /A Date: # of seals D Signature D Initials Section 3: Condition / Packaging Important: Notify PM If ~ceeds &•c or arrive frozen Date Opened C JS /'lj By (print) 11-1, (sign) /\.
~mples received on ice directly from the field. Cooling process had begun. (if checked, skip temperatures) If no cooler: Sample Temp ("C):

How many coolers?~ Temp ("C): #1: #2: #3: #4: #5: #6:

Temperature measu~ed us' g D Thermometer ID: or IR Gun# 0 B DC Type of ice used : et, D Blue/Gel, D None Temperature blank(s) included? iz(Yes, □ No Section 4: Containers/ Labels/ Samples YES NO N/A
Were custody papers dry, filled out properly, and the project identifiable? ---L,..

Were Method 5035 sampling containers present? Transferred to freezer@: ,,...-- Did all containers arrive unbroken/unopened? /"'
Are there any missing/ extra samples? ,.,.,,.--
Are samples in the appropriate containers for indicated tests? .,,,,,,,,.,, Are sample labels present, in good condition and complete? Does the container count match the COC? ---- _/
Do the sample labels agree with custody papers? I/"'
Was sufficient amount of sample sent for tests requested? Did you change the hold time in LIMS for unpreserved VOAs? ---- ----- Did you change the hold time in LIMS for preserved terracores? ~ Are bubbles> 6mm present in VOA samples? / Was the client contacted about this delivery? Contacted: By: Date:

Section 5: Preservatives YES NO ---- N/A
Are the samples appropriately preserved? (if yes, skip the rest of section 5) / Did any samples/ containers require preservation upon receipt? Did you document your preservative check in the bench book? Preservative added:
0 H2SO4 lot# added to samples Date/Time
0 HCLlot# added to samples Date/Time
0 HNO3 lot# added to samples Date/Time
0 CrVI Buffer lot# added to samples Date/Time
Section 6: Explanations/ Comments
- (/)rfi1 n~ -.1{l)(f,-::J. lb< A...'+-.,,,n'71... f f ~ r ' /ArrJh<-\ - rl,ri,1 ~ MD'{) ,.., f}JWI A,.--i) ,,,. l -r' ,.,.~) .... ,."'- r~/ " ' \ ) ~~. --,_,
Date Logged SL-:;{~ By (print) """' (sign) -~ '
-----
Date Labeled ~-~-it.\ By (print) Io-Ji.-X£ieP:M (sign) AJA / - 7~ Enthalpy Analvtical - Berkeley Rev.15.1. 09/13/2019

Page 1414 of 1860 ends

12 of 71
Section 1
Client: Baseline Environmental
Date Received: 8/6/24
Section 2
.ENTHALPY

ANALYTICAL

SAMPLE ACCEPTANCE CHECKLIST
Project: East County Service Center
Sampler's Name Present: f71Yes n No
r71 n -r' 17
r-.?-
□
~· '?,{ ~ Sample Temp ("C) Sample(s) received in a cooler? tfJYes, How many~--- No (skip se !ion 2) (No Cooler): __ Sample Temp (
0 C), One from each cooler: #1: 2.6 #2: '5 · q #3: ____ #4: ____ _ (Acceptance range is < 6"C but not frozen (for Microbiology samples, occeptonce range is < 10"C but not frozen}. II· is acceptable for samples collected the some day as sample receipt to have o higher temperature as Jang as there is evidence that cooling /,as begun.) Shipping Information:

Section 3
Was the cooler packed with: [l]ice Packs IZ]Bubble Wrap O styrofoam Cooler Tern (°C : #1: 2.6
[l]1ce
O Paper None S n other _______ _
#2: 'tif"" #3: #4:

Section 4 YES
Was a COC received? ✓
Are sample IDs present? ✓
Are sampling dates & times present? ✓
Is a relinquished signature present? ✓
Are the tests required clearly indicated on the COC? ✓
Are custody seals present? ✓
If custody seals are present, were they intact? ✓
Are all samples sealed in plastic bags? (Recommended for Microbiology samples) Did all samples arrive intact? If no, indicate in Section 4 below. ✓ Did all bottle labels agree with COC? (ID, dates and times) ✓ Were the samples collected in the correct containers for the required tests? ✓ Are the containers labeled with the correct preservatives? Is there headspace in the VOA vials greater than 5-6 mm in diameter? Was a sufficient amount of sample submitted for the requested tests? ✓ NO N/A
✓
✓
✓
r;jb/M_
t?. ~ 5• Section 5 Explanations/ Comments
() '71 d .,,. G ~-S. rit 6/9-tf H:t"il!!'P"l:rmod 4 composite sample§, rtfv/:t, ,-sere+~ ~- { See Berkeley cooler sheet for discrepancies.

Section 6
For discrepancies, how was the Project Manager notified? O verbal O Email
PM Initials: _ _ Date/Time _ ___ _
(email sent to/on): __ / _____ _
Project Manager's response:

AUG C 6 2024
Enthal alytical, a subsidiary of Montrose Environment al Group ,Inc. 931 W. Barkley Ave, Orange, CA 921168 • T: (714) 771-6900 • F: (714) 538-1209 ,vww.enthalpy.com/soc"I
Sample Acceptance Checklist-Rev 4, 8/8/2017

Page 1415 of 1860 ends

13 of 71
,;
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SOUTHWEST AIRLINES
52tDAK 1595 3114 rm \
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Page 1416 of 1860 ends

14 of 71
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Page 1417 of 1860 ends

15 of 71
[External] - Re: 24201-01 - Enthalpy Data (513507)
Cem Atabek <[email protected]>
Mon 8/12/2024 5:30 PM
To:Miguel Gamboa <[email protected]>
Hi Miguel, please perform the following additional analysis on a normal TAT:
-Soluble chromium by the WET method for sampels COMP-2, COMP-3, and COMP-4. -OCPs for samples B-4:1.5-2.0, B-6:1.5-2.0, B-8:1.5-2.0 Thanks,
-Cem
Cem Atabek
Baseline Environmental Consulting
388 17th Street, Suite 230
Oakland, CA 94612
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Mail: PO Box 18586, Oakland, CA 94619
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On Mon, Aug 12, 2024 at 4:20 PM Miguel Gamboa < [email protected] > wrote:

HiCem,
Please find attached the following files:
• PDF Deliverable
• Standard format+ MDL EDD (513507_standard-mdl.zip)
Miguel Gamboa
Project Coordinator
Enthalpy Analytical, LLC
2323 Fifth St., Berkeley, CA 94710

Page 1418 of 1860 ends

Field ID: COMP-1 Diln Fac: 1.000 Analyzed: 08/09/24
Type: SAMPLE Batch#: 347219 Prep: EPA 3580M
Lab ID: 513507-017 Sampled: 08/05/24 Analysis: EPA 8015M Matrix: Soil Received: 08/05/24 Analyst: KMB
Basis: as received Prepared: 08/08/24
513507-017 Analyte Result RL Units
GRO C8-C10 ND 10 mg/Kg
DRO C10-C28 ND 10 mg/Kg
ORO C28-C44 25 20 mg/Kg
513507-017 Surrogate %REC Limits
n-Triacontane 70 70-130
Field ID: COMP-2 Diln Fac: 1.000 Analyzed: 08/09/24
Type: SAMPLE Batch#: 347219 Prep: EPA 3580M
Lab ID: 513507-018 Sampled: 08/05/24 Analysis: EPA 8015M Matrix: Soil Received: 08/05/24 Analyst: KMB
Basis: as received Prepared: 08/08/24
513507-018 Analyte Result RL Units
GRO C8-C10 ND 10 mg/Kg
DRO C10-C28 ND 10 mg/Kg
ORO C28-C44 ND 20 mg/Kg
513507-018 Surrogate %REC Limits
n-Triacontane 98 70-130
Field ID: COMP-3 Diln Fac: 1.000 Analyzed: 08/09/24
Type: SAMPLE Batch#: 347219 Prep: EPA 3580M
Lab ID: 513507-019 Sampled: 08/05/24 Analysis: EPA 8015M Matrix: Soil Received: 08/05/24 Analyst: KMB
Basis: as received Prepared: 08/08/24
513507-019 Analyte Result RL Units
GRO C8-C10 ND 9.9 mg/Kg
DRO C10-C28 ND 9.9 mg/Kg
ORO C28-C44 ND 20 mg/Kg
513507-019 Surrogate %REC Limits
n-Triacontane 85 70-130
1 of 2 v28.001
Extractable Carbon Chain
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 16 of 71
HA .P

ANALYTICAL

Page 1419 of 1860 ends

Field ID: COMP-4 Diln Fac: 1.000 Analyzed: 08/09/24
Type: SAMPLE Batch#: 347219 Prep: EPA 3580M
Lab ID: 513507-020 Sampled: 08/05/24 Analysis: EPA 8015M Matrix: Soil Received: 08/05/24 Analyst: KMB
Basis: as received Prepared: 08/08/24
513507-020 Analyte Result RL Units
GRO C8-C10 ND 10 mg/Kg
DRO C10-C28 ND 10 mg/Kg
ORO C28-C44 ND 20 mg/Kg
513507-020 Surrogate %REC Limits
n-Triacontane 85 70-130
Type: BLANK Batch#: 347219 Analysis: EPA 8015M
Lab ID: QC1176423 Prepared: 08/08/24 Analyst: KMB
Matrix: Soil Analyzed: 08/08/24
Diln Fac: 1.000 Prep: EPA 3580M
QC1176423 Analyte Result RL Units
GRO C8-C10 ND 10 mg/Kg
DRO C10-C28 ND 10 mg/Kg
ORO C28-C44 ND 20 mg/Kg
QC1176423 Surrogate %REC Limits
n-Triacontane 78 70-130
Legend
ND: Not Detected
RL: Reporting Limit
2 of 2 v28.001
Extractable Carbon Chain
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 17 of 71
HA .P

ANALYTICAL

Page 1420 of 1860 ends

Type: LCS Batch#: 347219 Analysis: EPA 8015M
Lab ID: QC1176424 Prepared: 08/08/24 Analyst: KMB
Matrix: Soil Analyzed: 08/08/24
Diln Fac: 1.000 Prep: EPA 3580M
QC1176424 Analyte Spiked Result %REC Limits Units
Diesel C10-C28 251.3 234.1 93 76-122 mg/Kg
QC1176424 Surrogate %REC Limits
n-Triacontane 84 70-130
1 of 1 v29
Extractable Carbon Chain: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 18 of 71
HA .P

ANALYTICAL

Page 1421 of 1860 ends

Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/08/24 Type: MS Diln Fac: 1.000 Analyzed: 08/08/24
MSS Lab ID: 513602-001 Batch#: 347219 Prep: EPA 3580M
Lab ID: QC1176425 Sampled: 07/25/24 Analysis: EPA 8015M Matrix: Soil Received: 08/08/24 Analyst: KMB
QC1176425 Analyte MSS Result Spiked Result %REC Limits Units Diesel C10-C28 <3.445 247.9 221.9 90 62-126 mg/Kg
QC1176425 Surrogate %REC Limits
n-Triacontane 79 70-130
Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/08/24 Type: MSD Diln Fac: 1.000 Analyzed: 08/08/24
MSS Lab ID: 513602-001 Batch#: 347219 Prep: EPA 3580M
Lab ID: QC1176426 Sampled: 07/25/24 Analysis: EPA 8015M Matrix: Soil Received: 08/08/24 Analyst: KMB
QC1176426 Analyte Spiked Result %REC Limits Units RPD Lim Diesel C10-C28 248.4 201.6 81 62-126 mg/Kg 10 35
QC1176426 Surrogate %REC Limits
n-Triacontane 71 70-130
Legend
RPD: Relative Percent
Difference
1 of 1 v30
Extractable Carbon Chain: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 19 of 71
HA .P

ANALYTICAL

Page 1422 of 1860 ends

Field ID: COMP-1 Batch#: 347040 Prep: EPA 5030B
Lab ID: 513507-017 Sampled: 08/05/24 Analysis: EPA 8260B Matrix: Soil Received: 08/05/24 Analyst: HMN
Diln Fac: 1.000 Analyzed: 08/07/24
513507-017 Analyte Result RL Units Basis
Freon 12 ND 5.0 ug/Kg as received
Chloromethane ND 5.0 ug/Kg as received
Vinyl Chloride ND 5.0 ug/Kg as received
Bromomethane ND 5.0 ug/Kg as received
Chloroethane ND 5.0 ug/Kg as received
Trichlorofluoromethane ND 5.0 ug/Kg as received
Acetone ND 100 ug/Kg as received
Freon 113 ND 5.0 ug/Kg as received
1,1-Dichloroethene ND 5.0 ug/Kg as received
Methylene Chloride ND 20 ug/Kg as received
MTBE ND 5.0 ug/Kg as received
trans-1,2-Dichloroethene ND 5.0 ug/Kg as received
1,1-Dichloroethane ND 5.0 ug/Kg as received
2-Butanone ND 100 ug/Kg as received
cis-1,2-Dichloroethene ND 5.0 ug/Kg as received
2,2-Dichloropropane ND 5.0 ug/Kg as received
Chloroform ND 5.0 ug/Kg as received
Bromochloromethane ND 5.0 ug/Kg as received
1,1,1-Trichloroethane ND 5.0 ug/Kg as received
1,1-Dichloropropene ND 5.0 ug/Kg as received
Carbon Tetrachloride ND 5.0 ug/Kg as received
1,2-Dichloroethane ND 5.0 ug/Kg as received
Benzene ND 5.0 ug/Kg as received
Trichloroethene ND 5.0 ug/Kg as received
1,2-Dichloropropane ND 5.0 ug/Kg as received
Bromodichloromethane ND 5.0 ug/Kg as received
Dibromomethane ND 5.0 ug/Kg as received
4-Methyl-2-Pentanone ND 5.0 ug/Kg as received
cis-1,3-Dichloropropene ND 5.0 ug/Kg as received
Toluene ND 5.0 ug/Kg as received
trans-1,3-Dichloropropene ND 5.0 ug/Kg as received
1,1,2-Trichloroethane ND 5.0 ug/Kg as received
1,3-Dichloropropane ND 5.0 ug/Kg as received
Tetrachloroethene ND 5.0 ug/Kg as received
Dibromochloromethane ND 5.0 ug/Kg as received
1,2-Dibromoethane ND 5.0 ug/Kg as received
Chlorobenzene ND 5.0 ug/Kg as received
1,1,1,2-Tetrachloroethane ND 5.0 ug/Kg as received
Ethylbenzene ND 5.0 ug/Kg as received
m,p-Xylenes ND 10 ug/Kg as received
o-Xylene ND 5.0 ug/Kg as received
Styrene ND 5.0 ug/Kg as received
Bromoform ND 5.0 ug/Kg as received
Isopropylbenzene ND 5.0 ug/Kg as received
1,1,2,2-Tetrachloroethane ND 5.0 ug/Kg as received
1,2,3-Trichloropropane ND 5.0 ug/Kg as received
1 of 2 v21
Purgeable Organics by GC/MS
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 20 of 71
HA .P

ANALYTICAL

Page 1423 of 1860 ends

Propylbenzene ND 5.0 ug/Kg as received
Bromobenzene ND 5.0 ug/Kg as received
1,3,5-Trimethylbenzene ND 5.0 ug/Kg as received
2-Chlorotoluene ND 5.0 ug/Kg as received
4-Chlorotoluene ND 5.0 ug/Kg as received
tert-Butylbenzene ND 5.0 ug/Kg as received
1,2,4-Trimethylbenzene ND 5.0 ug/Kg as received
sec-Butylbenzene ND 5.0 ug/Kg as received
para-Isopropyl Toluene ND 5.0 ug/Kg as received
1,3-Dichlorobenzene ND 5.0 ug/Kg as received
1,4-Dichlorobenzene ND 5.0 ug/Kg as received
n-Butylbenzene ND 5.0 ug/Kg as received
1,2-Dichlorobenzene ND 5.0 ug/Kg as received
1,2-Dibromo-3-Chloropropane ND 5.0 ug/Kg as received
1,2,4-Trichlorobenzene ND 5.0 ug/Kg as received
Hexachlorobutadiene ND 5.0 ug/Kg as received
Naphthalene ND 5.0 ug/Kg as received
1,2,3-Trichlorobenzene ND 5.0 ug/Kg as received
Xylene (total) ND 5.0 ug/Kg
513507-017 Analyte Result RL Units Basis
513507-017 Surrogate %REC Limits Basis
Dibromofluoromethane 100 70-145 as received
1,2-Dichloroethane-d4 105 70-145 as received
Toluene-d8 95 70-145 as received
Bromofluorobenzene 98 70-145 as received
Legend
ND: Not Detected
RL: Reporting Limit
2 of 2 v21
Purgeable Organics by GC/MS
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 21 of 71
HA .P

ANALYTICAL

Page 1424 of 1860 ends

Field ID: COMP-2 Batch#: 347040 Prep: EPA 5030B
Lab ID: 513507-018 Sampled: 08/05/24 Analysis: EPA 8260B Matrix: Soil Received: 08/05/24 Analyst: HMN
Diln Fac: 1.000 Analyzed: 08/07/24
513507-018 Analyte Result RL Units Basis
Freon 12 ND 5.0 ug/Kg as received
Chloromethane ND 5.0 ug/Kg as received
Vinyl Chloride ND 5.0 ug/Kg as received
Bromomethane ND 5.0 ug/Kg as received
Chloroethane ND 5.0 ug/Kg as received
Trichlorofluoromethane ND 5.0 ug/Kg as received
Acetone ND 100 ug/Kg as received
Freon 113 ND 5.0 ug/Kg as received
1,1-Dichloroethene ND 5.0 ug/Kg as received
Methylene Chloride ND 20 ug/Kg as received
MTBE ND 5.0 ug/Kg as received
trans-1,2-Dichloroethene ND 5.0 ug/Kg as received
1,1-Dichloroethane ND 5.0 ug/Kg as received
2-Butanone ND 100 ug/Kg as received
cis-1,2-Dichloroethene ND 5.0 ug/Kg as received
2,2-Dichloropropane ND 5.0 ug/Kg as received
Chloroform ND 5.0 ug/Kg as received
Bromochloromethane ND 5.0 ug/Kg as received
1,1,1-Trichloroethane ND 5.0 ug/Kg as received
1,1-Dichloropropene ND 5.0 ug/Kg as received
Carbon Tetrachloride ND 5.0 ug/Kg as received
1,2-Dichloroethane ND 5.0 ug/Kg as received
Benzene ND 5.0 ug/Kg as received
Trichloroethene ND 5.0 ug/Kg as received
1,2-Dichloropropane ND 5.0 ug/Kg as received
Bromodichloromethane ND 5.0 ug/Kg as received
Dibromomethane ND 5.0 ug/Kg as received
4-Methyl-2-Pentanone ND 5.0 ug/Kg as received
cis-1,3-Dichloropropene ND 5.0 ug/Kg as received
Toluene ND 5.0 ug/Kg as received
trans-1,3-Dichloropropene ND 5.0 ug/Kg as received
1,1,2-Trichloroethane ND 5.0 ug/Kg as received
1,3-Dichloropropane ND 5.0 ug/Kg as received
Tetrachloroethene ND 5.0 ug/Kg as received
Dibromochloromethane ND 5.0 ug/Kg as received
1,2-Dibromoethane ND 5.0 ug/Kg as received
Chlorobenzene ND 5.0 ug/Kg as received
1,1,1,2-Tetrachloroethane ND 5.0 ug/Kg as received
Ethylbenzene ND 5.0 ug/Kg as received
m,p-Xylenes ND 10 ug/Kg as received
o-Xylene ND 5.0 ug/Kg as received
Styrene ND 5.0 ug/Kg as received
Bromoform ND 5.0 ug/Kg as received
Isopropylbenzene ND 5.0 ug/Kg as received
1,1,2,2-Tetrachloroethane ND 5.0 ug/Kg as received
1,2,3-Trichloropropane ND 5.0 ug/Kg as received
1 of 2 v22
Purgeable Organics by GC/MS
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 22 of 71
HA .P

ANALYTICAL

Page 1425 of 1860 ends

Propylbenzene ND 5.0 ug/Kg as received
Bromobenzene ND 5.0 ug/Kg as received
1,3,5-Trimethylbenzene ND 5.0 ug/Kg as received
2-Chlorotoluene ND 5.0 ug/Kg as received
4-Chlorotoluene ND 5.0 ug/Kg as received
tert-Butylbenzene ND 5.0 ug/Kg as received
1,2,4-Trimethylbenzene ND 5.0 ug/Kg as received
sec-Butylbenzene ND 5.0 ug/Kg as received
para-Isopropyl Toluene ND 5.0 ug/Kg as received
1,3-Dichlorobenzene ND 5.0 ug/Kg as received
1,4-Dichlorobenzene ND 5.0 ug/Kg as received
n-Butylbenzene ND 5.0 ug/Kg as received
1,2-Dichlorobenzene ND 5.0 ug/Kg as received
1,2-Dibromo-3-Chloropropane ND 5.0 ug/Kg as received
1,2,4-Trichlorobenzene ND 5.0 ug/Kg as received
Hexachlorobutadiene ND 5.0 ug/Kg as received
Naphthalene ND 5.0 ug/Kg as received
1,2,3-Trichlorobenzene ND 5.0 ug/Kg as received
Xylene (total) ND 5.0 ug/Kg
513507-018 Analyte Result RL Units Basis
513507-018 Surrogate %REC Limits Basis
Dibromofluoromethane 97 70-145 as received
1,2-Dichloroethane-d4 102 70-145 as received
Toluene-d8 96 70-145 as received
Bromofluorobenzene 99 70-145 as received
Legend
ND: Not Detected
RL: Reporting Limit
2 of 2 v22
Purgeable Organics by GC/MS
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 23 of 71
HA .P

ANALYTICAL

Page 1426 of 1860 ends

Field ID: COMP-3 Batch#: 347040 Prep: EPA 5030B
Lab ID: 513507-019 Sampled: 08/05/24 Analysis: EPA 8260B Matrix: Soil Received: 08/05/24 Analyst: HMN
Diln Fac: 1.000 Analyzed: 08/07/24
513507-019 Analyte Result RL Units Basis
Freon 12 ND 5.0 ug/Kg as received
Chloromethane ND 5.0 ug/Kg as received
Vinyl Chloride ND 5.0 ug/Kg as received
Bromomethane ND 5.0 ug/Kg as received
Chloroethane ND 5.0 ug/Kg as received
Trichlorofluoromethane ND 5.0 ug/Kg as received
Acetone ND 100 ug/Kg as received
Freon 113 ND 5.0 ug/Kg as received
1,1-Dichloroethene ND 5.0 ug/Kg as received
Methylene Chloride ND 20 ug/Kg as received
MTBE ND 5.0 ug/Kg as received
trans-1,2-Dichloroethene ND 5.0 ug/Kg as received
1,1-Dichloroethane ND 5.0 ug/Kg as received
2-Butanone ND 100 ug/Kg as received
cis-1,2-Dichloroethene ND 5.0 ug/Kg as received
2,2-Dichloropropane ND 5.0 ug/Kg as received
Chloroform ND 5.0 ug/Kg as received
Bromochloromethane ND 5.0 ug/Kg as received
1,1,1-Trichloroethane ND 5.0 ug/Kg as received
1,1-Dichloropropene ND 5.0 ug/Kg as received
Carbon Tetrachloride ND 5.0 ug/Kg as received
1,2-Dichloroethane ND 5.0 ug/Kg as received
Benzene ND 5.0 ug/Kg as received
Trichloroethene ND 5.0 ug/Kg as received
1,2-Dichloropropane ND 5.0 ug/Kg as received
Bromodichloromethane ND 5.0 ug/Kg as received
Dibromomethane ND 5.0 ug/Kg as received
4-Methyl-2-Pentanone ND 5.0 ug/Kg as received
cis-1,3-Dichloropropene ND 5.0 ug/Kg as received
Toluene ND 5.0 ug/Kg as received
trans-1,3-Dichloropropene ND 5.0 ug/Kg as received
1,1,2-Trichloroethane ND 5.0 ug/Kg as received
1,3-Dichloropropane ND 5.0 ug/Kg as received
Tetrachloroethene ND 5.0 ug/Kg as received
Dibromochloromethane ND 5.0 ug/Kg as received
1,2-Dibromoethane ND 5.0 ug/Kg as received
Chlorobenzene ND 5.0 ug/Kg as received
1,1,1,2-Tetrachloroethane ND 5.0 ug/Kg as received
Ethylbenzene ND 5.0 ug/Kg as received
m,p-Xylenes ND 10 ug/Kg as received
o-Xylene ND 5.0 ug/Kg as received
Styrene ND 5.0 ug/Kg as received
Bromoform ND 5.0 ug/Kg as received
Isopropylbenzene ND 5.0 ug/Kg as received
1,1,2,2-Tetrachloroethane ND 5.0 ug/Kg as received
1,2,3-Trichloropropane ND 5.0 ug/Kg as received
1 of 2 v23
Purgeable Organics by GC/MS
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 24 of 71
HA .P

ANALYTICAL

Page 1427 of 1860 ends

Propylbenzene ND 5.0 ug/Kg as received
Bromobenzene ND 5.0 ug/Kg as received
1,3,5-Trimethylbenzene ND 5.0 ug/Kg as received
2-Chlorotoluene ND 5.0 ug/Kg as received
4-Chlorotoluene ND 5.0 ug/Kg as received
tert-Butylbenzene ND 5.0 ug/Kg as received
1,2,4-Trimethylbenzene ND 5.0 ug/Kg as received
sec-Butylbenzene ND 5.0 ug/Kg as received
para-Isopropyl Toluene ND 5.0 ug/Kg as received
1,3-Dichlorobenzene ND 5.0 ug/Kg as received
1,4-Dichlorobenzene ND 5.0 ug/Kg as received
n-Butylbenzene ND 5.0 ug/Kg as received
1,2-Dichlorobenzene ND 5.0 ug/Kg as received
1,2-Dibromo-3-Chloropropane ND 5.0 ug/Kg as received
1,2,4-Trichlorobenzene ND 5.0 ug/Kg as received
Hexachlorobutadiene ND 5.0 ug/Kg as received
Naphthalene ND 5.0 ug/Kg as received
1,2,3-Trichlorobenzene ND 5.0 ug/Kg as received
Xylene (total) ND 5.0 ug/Kg
513507-019 Analyte Result RL Units Basis
513507-019 Surrogate %REC Limits Basis
Dibromofluoromethane 106 70-145 as received
1,2-Dichloroethane-d4 113 70-145 as received
Toluene-d8 97 70-145 as received
Bromofluorobenzene 99 70-145 as received
Legend
ND: Not Detected
RL: Reporting Limit
2 of 2 v23
Purgeable Organics by GC/MS
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 25 of 71
HA .P

ANALYTICAL

Page 1428 of 1860 ends

Field ID: COMP-4 Batch#: 347040 Prep: EPA 5030B
Lab ID: 513507-020 Sampled: 08/05/24 Analysis: EPA 8260B Matrix: Soil Received: 08/05/24 Analyst: LYZ
Diln Fac: 1.000 Analyzed: 08/07/24
513507-020 Analyte Result RL Units Basis
Freon 12 ND 5.0 ug/Kg as received
Chloromethane ND 5.0 ug/Kg as received
Vinyl Chloride ND 5.0 ug/Kg as received
Bromomethane ND 5.0 ug/Kg as received
Chloroethane ND 5.0 ug/Kg as received
Trichlorofluoromethane ND 5.0 ug/Kg as received
Acetone ND 100 ug/Kg as received
Freon 113 ND 5.0 ug/Kg as received
1,1-Dichloroethene ND 5.0 ug/Kg as received
Methylene Chloride ND 20 ug/Kg as received
MTBE ND 5.0 ug/Kg as received
trans-1,2-Dichloroethene ND 5.0 ug/Kg as received
1,1-Dichloroethane ND 5.0 ug/Kg as received
2-Butanone ND 100 ug/Kg as received
cis-1,2-Dichloroethene ND 5.0 ug/Kg as received
2,2-Dichloropropane ND 5.0 ug/Kg as received
Chloroform ND 5.0 ug/Kg as received
Bromochloromethane ND 5.0 ug/Kg as received
1,1,1-Trichloroethane ND 5.0 ug/Kg as received
1,1-Dichloropropene ND 5.0 ug/Kg as received
Carbon Tetrachloride ND 5.0 ug/Kg as received
1,2-Dichloroethane ND 5.0 ug/Kg as received
Benzene ND 5.0 ug/Kg as received
Trichloroethene ND 5.0 ug/Kg as received
1,2-Dichloropropane ND 5.0 ug/Kg as received
Bromodichloromethane ND 5.0 ug/Kg as received
Dibromomethane ND 5.0 ug/Kg as received
4-Methyl-2-Pentanone ND 5.0 ug/Kg as received
cis-1,3-Dichloropropene ND 5.0 ug/Kg as received
Toluene ND 5.0 ug/Kg as received
trans-1,3-Dichloropropene ND 5.0 ug/Kg as received
1,1,2-Trichloroethane ND 5.0 ug/Kg as received
1,3-Dichloropropane ND 5.0 ug/Kg as received
Tetrachloroethene ND 5.0 ug/Kg as received
Dibromochloromethane ND 5.0 ug/Kg as received
1,2-Dibromoethane ND 5.0 ug/Kg as received
Chlorobenzene ND 5.0 ug/Kg as received
1,1,1,2-Tetrachloroethane ND 5.0 ug/Kg as received
Ethylbenzene ND 5.0 ug/Kg as received
m,p-Xylenes ND 10 ug/Kg as received
o-Xylene ND 5.0 ug/Kg as received
Styrene ND 5.0 ug/Kg as received
Bromoform ND 5.0 ug/Kg as received
Isopropylbenzene ND 5.0 ug/Kg as received
1,1,2,2-Tetrachloroethane ND 5.0 ug/Kg as received
1,2,3-Trichloropropane ND 5.0 ug/Kg as received
1 of 2 v24
Purgeable Organics by GC/MS
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 26 of 71
HA .P

ANALYTICAL

Page 1429 of 1860 ends

Propylbenzene ND 5.0 ug/Kg as received
Bromobenzene ND 5.0 ug/Kg as received
1,3,5-Trimethylbenzene ND 5.0 ug/Kg as received
2-Chlorotoluene ND 5.0 ug/Kg as received
4-Chlorotoluene ND 5.0 ug/Kg as received
tert-Butylbenzene ND 5.0 ug/Kg as received
1,2,4-Trimethylbenzene ND 5.0 ug/Kg as received
sec-Butylbenzene ND 5.0 ug/Kg as received
para-Isopropyl Toluene ND 5.0 ug/Kg as received
1,3-Dichlorobenzene ND 5.0 ug/Kg as received
1,4-Dichlorobenzene ND 5.0 ug/Kg as received
n-Butylbenzene ND 5.0 ug/Kg as received
1,2-Dichlorobenzene ND 5.0 ug/Kg as received
1,2-Dibromo-3-Chloropropane ND 5.0 ug/Kg as received
1,2,4-Trichlorobenzene ND 5.0 ug/Kg as received
Hexachlorobutadiene ND 5.0 ug/Kg as received
Naphthalene ND 5.0 ug/Kg as received
1,2,3-Trichlorobenzene ND 5.0 ug/Kg as received
Xylene (total) ND 5.0 ug/Kg
513507-020 Analyte Result RL Units Basis
513507-020 Surrogate %REC Limits Basis
Dibromofluoromethane 106 70-145 as received
1,2-Dichloroethane-d4 112 70-145 as received
Toluene-d8 96 70-145 as received
Bromofluorobenzene 100 70-145 as received
Legend
ND: Not Detected
RL: Reporting Limit
2 of 2 v24
Purgeable Organics by GC/MS
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 27 of 71
HA .P

ANALYTICAL

Page 1430 of 1860 ends

Type: BLANK Diln Fac: 1.000 Prep: EPA 5030B
Lab ID: QC1175881 Batch#: 347040 Analysis: EPA 8260B
Matrix: Soil Analyzed: 08/07/24 Analyst: HMN
QC1175881 Analyte Result RL Units
Freon 12 ND 5.0 ug/Kg
Chloromethane ND 5.0 ug/Kg
Vinyl Chloride ND 5.0 ug/Kg
Bromomethane ND 5.0 ug/Kg
Chloroethane ND 5.0 ug/Kg
Trichlorofluoromethane ND 5.0 ug/Kg
Acetone ND 100 ug/Kg
Freon 113 ND 5.0 ug/Kg
1,1-Dichloroethene ND 5.0 ug/Kg
Methylene Chloride ND 20 ug/Kg
MTBE ND 5.0 ug/Kg
trans-1,2-Dichloroethene ND 5.0 ug/Kg
1,1-Dichloroethane ND 5.0 ug/Kg
2-Butanone ND 100 ug/Kg
cis-1,2-Dichloroethene ND 5.0 ug/Kg
2,2-Dichloropropane ND 5.0 ug/Kg
Chloroform ND 5.0 ug/Kg
Bromochloromethane ND 5.0 ug/Kg
1,1,1-Trichloroethane ND 5.0 ug/Kg
1,1-Dichloropropene ND 5.0 ug/Kg
Carbon Tetrachloride ND 5.0 ug/Kg
1,2-Dichloroethane ND 5.0 ug/Kg
Benzene ND 5.0 ug/Kg
Trichloroethene ND 5.0 ug/Kg
1,2-Dichloropropane ND 5.0 ug/Kg
Bromodichloromethane ND 5.0 ug/Kg
Dibromomethane ND 5.0 ug/Kg
4-Methyl-2-Pentanone ND 5.0 ug/Kg
cis-1,3-Dichloropropene ND 5.0 ug/Kg
Toluene ND 5.0 ug/Kg
trans-1,3-Dichloropropene ND 5.0 ug/Kg
1,1,2-Trichloroethane ND 5.0 ug/Kg
1,3-Dichloropropane ND 5.0 ug/Kg
Tetrachloroethene ND 5.0 ug/Kg
Dibromochloromethane ND 5.0 ug/Kg
1,2-Dibromoethane ND 5.0 ug/Kg
Chlorobenzene ND 5.0 ug/Kg
1,1,1,2-Tetrachloroethane ND 5.0 ug/Kg
Ethylbenzene ND 5.0 ug/Kg
m,p-Xylenes ND 10 ug/Kg
o-Xylene ND 5.0 ug/Kg
Styrene ND 5.0 ug/Kg
Bromoform ND 5.0 ug/Kg
Isopropylbenzene ND 5.0 ug/Kg
1,1,2,2-Tetrachloroethane ND 5.0 ug/Kg
1,2,3-Trichloropropane ND 5.0 ug/Kg
Propylbenzene ND 5.0 ug/Kg
Bromobenzene ND 5.0 ug/Kg
1 of 2 v25
Purgeable Organics by GC/MS: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 28 of 71
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1,3,5-Trimethylbenzene ND 5.0 ug/Kg
2-Chlorotoluene ND 5.0 ug/Kg
4-Chlorotoluene ND 5.0 ug/Kg
tert-Butylbenzene ND 5.0 ug/Kg
1,2,4-Trimethylbenzene ND 5.0 ug/Kg
sec-Butylbenzene ND 5.0 ug/Kg
para-Isopropyl Toluene ND 5.0 ug/Kg
1,3-Dichlorobenzene ND 5.0 ug/Kg
1,4-Dichlorobenzene ND 5.0 ug/Kg
n-Butylbenzene ND 5.0 ug/Kg
1,2-Dichlorobenzene ND 5.0 ug/Kg
1,2-Dibromo-3-Chloropropane ND 5.0 ug/Kg
1,2,4-Trichlorobenzene ND 5.0 ug/Kg
Hexachlorobutadiene ND 5.0 ug/Kg
Naphthalene ND 5.0 ug/Kg
1,2,3-Trichlorobenzene ND 5.0 ug/Kg
Xylene (total) ND 5.0 ug/Kg
QC1175881 Analyte Result RL Units
QC1175881 Surrogate %REC Limits
Dibromofluoromethane 105 70-130
1,2-Dichloroethane-d4 108 70-145
Toluene-d8 97 70-145
Bromofluorobenzene 98 70-145
Legend
ND: Not Detected
RL: Reporting Limit
2 of 2 v25
Purgeable Organics by GC/MS: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 29 of 71
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Type: BS Diln Fac: 1.000 Prep: EPA 5030B
Lab ID: QC1175882 Batch#: 347040 Analysis: EPA 8260B
Matrix: Soil Analyzed: 08/07/24 Analyst: HMN
QC1175882 Analyte Spiked Result %REC Limits Units
1,1-Dichloroethene 50.00 51.03 102 70-131 ug/Kg
MTBE 50.00 50.16 100 69-130 ug/Kg
Benzene 50.00 50.68 101 70-130 ug/Kg
Trichloroethene 50.00 48.70 97 70-130 ug/Kg
Toluene 50.00 47.38 95 70-130 ug/Kg
Chlorobenzene 50.00 47.03 94 70-130 ug/Kg
QC1175882 Surrogate %REC Limits
Dibromofluoromethane 105 70-130
1,2-Dichloroethane-d4 107 70-145
Toluene-d8 97 70-145
Bromofluorobenzene 99 70-145
Type: BSD Diln Fac: 1.000 Prep: EPA 5030B
Lab ID: QC1175883 Batch#: 347040 Analysis: EPA 8260B
Matrix: Soil Analyzed: 08/07/24 Analyst: HMN
QC1175883 Analyte Spiked Result %REC Limits Units RPD Lim 1,1-Dichloroethene 50.00 44.07 88 70-131 ug/Kg 15 33
MTBE 50.00 43.45 87 69-130 ug/Kg 14 30
Benzene 50.00 43.76 88 70-130 ug/Kg 15 30
Trichloroethene 50.00 43.61 87 70-130 ug/Kg 11 30
Toluene 50.00 44.87 90 70-130 ug/Kg 5 30
Chlorobenzene 50.00 45.38 91 70-130 ug/Kg 4 30
QC1175883 Surrogate %REC Limits
Dibromofluoromethane 97 70-130
1,2-Dichloroethane-d4 97 70-145
Toluene-d8 97 70-145
Bromofluorobenzene 98 70-145
Legend
RPD: Relative Percent
Difference
1 of 1 v26
Purgeable Organics by GC/MS: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 30 of 71
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Field ID: COMP-1 Basis: as received Analyzed: 08/07/24
Type: MS Diln Fac: 1.000 Prep: EPA 5030B
MSS Lab ID: 513507-017 Batch#: 347040 Analysis: EPA 8260B Lab ID: QC1175935 Sampled: 08/05/24 Analyst: HMN
Matrix: Soil Received: 08/05/24
QC1175935 Analyte MSS Result Spiked Result %REC Limits Units 1,1-Dichloroethene <0.9491 50.00 49.57 99 70-141 ug/Kg
MTBE <0.6119 50.00 48.04 96 59-130 ug/Kg
Benzene <0.8085 50.00 48.86 98 70-130 ug/Kg
Trichloroethene <0.8705 50.00 49.23 98 69-130 ug/Kg
Toluene <0.9600 50.00 49.78 100 70-130 ug/Kg
Chlorobenzene <0.7500 50.00 49.72 99 70-130 ug/Kg
QC1175935 Surrogate %REC Limits
Dibromofluoromethane 98 70-145
1,2-Dichloroethane-d4 101 70-145
Toluene-d8 98 70-145
Bromofluorobenzene 98 70-145
Field ID: COMP-1 Basis: as received Analyzed: 08/07/24
Type: MSD Diln Fac: 1.000 Prep: EPA 5030B
MSS Lab ID: 513507-017 Batch#: 347040 Analysis: EPA 8260B Lab ID: QC1175936 Sampled: 08/05/24 Analyst: HMN
Matrix: Soil Received: 08/05/24
QC1175936 Analyte Spiked Result %REC Limits Units RPD Lim 1,1-Dichloroethene 50.00 37.63 75 70-141 ug/Kg 27 43
MTBE 50.00 32.96 66 59-130 ug/Kg 37 * 30
Benzene 50.00 36.41 73 70-130 ug/Kg 29 30
Trichloroethene 50.00 34.70 69 69-130 ug/Kg 35 * 30
Toluene 50.00 36.07 72 70-130 ug/Kg 32 * 30
Chlorobenzene 50.00 34.63 69 * 70-130 ug/Kg 36 * 30
QC1175936 Surrogate %REC Limits
Dibromofluoromethane 97 70-145
1,2-Dichloroethane-d4 100 70-145
Toluene-d8 97 70-145
Bromofluorobenzene 99 70-145
Legend
*: Value is outside QC limits
RPD: Relative Percent
Difference
1 of 1 v27
Purgeable Organics by GC/MS: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 31 of 71
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Field ID: B-1: 0.5-1.0 Batch#: 346998 Prep: EPA 3546
Lab ID: 513507-001 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: BLB
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-001 Analyte Result RL Units
alpha-BHC ND 5.0 ug/Kg
beta-BHC ND 5.0 ug/Kg
gamma-BHC ND 5.0 ug/Kg
delta-BHC ND 5.0 ug/Kg
Heptachlor ND 5.0 ug/Kg
Aldrin ND 5.0 ug/Kg
Heptachlor epoxide ND 5.0 ug/Kg
Endosulfan I ND 5.0 ug/Kg
Dieldrin ND 5.0 ug/Kg
4,4'-DDE ND 5.0 ug/Kg
Endrin ND 5.0 ug/Kg
Endosulfan II ND 5.0 ug/Kg
Endosulfan sulfate ND 5.0 ug/Kg
4,4'-DDD ND 5.0 ug/Kg
Endrin aldehyde ND 5.0 ug/Kg
Endrin ketone ND 5.0 ug/Kg
4,4'-DDT ND 5.0 ug/Kg
Methoxychlor ND 10 ug/Kg
Toxaphene ND 100 ug/Kg
Chlordane (Technical) ND 50 ug/Kg
513507-001 Surrogate %REC Limits
TCMX 81 23-120
Decachlorobiphenyl 68 24-120
Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v31.002
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 32 of 71
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Field ID: B-2: 0.5-1.0 Batch#: 346998 Prep: EPA 3546
Lab ID: 513507-003 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: BLB
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-003 Analyte Result RL Units
alpha-BHC ND 5.0 ug/Kg
beta-BHC ND 5.0 ug/Kg
gamma-BHC ND 5.0 ug/Kg
delta-BHC ND 5.0 ug/Kg
Heptachlor ND 5.0 ug/Kg
Aldrin ND 5.0 ug/Kg
Heptachlor epoxide ND 5.0 ug/Kg
Endosulfan I ND 5.0 ug/Kg
Dieldrin ND 5.0 ug/Kg
4,4'-DDE 11 5.0 ug/Kg
Endrin ND 5.0 ug/Kg
Endosulfan II ND 5.0 ug/Kg
Endosulfan sulfate ND 5.0 ug/Kg
4,4'-DDD ND 5.0 ug/Kg
Endrin aldehyde ND 5.0 ug/Kg
Endrin ketone ND 5.0 ug/Kg
4,4'-DDT ND 5.0 ug/Kg
Methoxychlor ND 10 ug/Kg
Toxaphene ND 100 ug/Kg
Chlordane (Technical) ND 50 ug/Kg
513507-003 Surrogate %REC Limits
TCMX 82 23-120
Decachlorobiphenyl 67 24-120
Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v32.002
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 33 of 71
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Field ID: B-3: 0.0-0.5 Batch#: 346998 Prep: EPA 3546
Lab ID: 513507-005 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: BLB
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-005 Analyte Result RL Units
alpha-BHC ND 5.0 ug/Kg
beta-BHC ND 5.0 ug/Kg
gamma-BHC ND 5.0 ug/Kg
delta-BHC ND 5.0 ug/Kg
Heptachlor ND 5.0 ug/Kg
Aldrin ND 5.0 ug/Kg
Heptachlor epoxide ND 5.0 ug/Kg
Endosulfan I ND 5.0 ug/Kg
Dieldrin ND 5.0 ug/Kg
4,4'-DDE 11 5.0 ug/Kg
Endrin ND 5.0 ug/Kg
Endosulfan II ND 5.0 ug/Kg
Endosulfan sulfate ND 5.0 ug/Kg
4,4'-DDD ND 5.0 ug/Kg
Endrin aldehyde ND 5.0 ug/Kg
Endrin ketone ND 5.0 ug/Kg
4,4'-DDT ND 5.0 ug/Kg
Methoxychlor ND 10 ug/Kg
Toxaphene ND 100 ug/Kg
Chlordane (Technical) ND 50 ug/Kg
513507-005 Surrogate %REC Limits
TCMX 82 23-120
Decachlorobiphenyl 65 24-120
Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v33.002
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 34 of 71
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Field ID: B-4: 0.0-0.5 Batch#: 346998 Prep: EPA 3546
Lab ID: 513507-007 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: MES
Basis: as received Prepared: 08/06/24
513507-007 Analyte Result RL Units Diln Fac Analyzed Qual alpha-BHC ND 5.0 ug/Kg 1.000 08/07/24
beta-BHC ND 5.0 ug/Kg 1.000 08/07/24
gamma-BHC ND 5.0 ug/Kg 1.000 08/07/24
delta-BHC ND 5.0 ug/Kg 1.000 08/07/24
Heptachlor ND 5.0 ug/Kg 1.000 08/07/24
Aldrin 6.1 5.0 ug/Kg 1.000 08/07/24 C
Heptachlor epoxide ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan I ND 5.0 ug/Kg 1.000 08/07/24
Dieldrin ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDE 1,000 50 ug/Kg 10.00 08/08/24
Endrin ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan II ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan sulfate ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDD ND 5.0 ug/Kg 1.000 08/07/24
Endrin aldehyde ND 5.0 ug/Kg 1.000 08/07/24
Endrin ketone ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDT 270 5.0 ug/Kg 1.000 08/07/24
Methoxychlor ND 10 ug/Kg 1.000 08/07/24
Toxaphene 1,300 1,000 ug/Kg 10.00 08/08/24
Chlordane (Technical) ND 50 ug/Kg 1.000 08/07/24
513507-007 Surrogate %REC Limits Diln Fac Analyzed
TCMX 84 23-120 1.000 08/07/24
Decachlorobiphenyl 68 24-120 1.000 08/07/24
Legend
C: Presence confirmed, but RPD between columns exceeds 40% ND: Not Detected
RL: Reporting Limit
1 of 1 v34.001
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 35 of 71
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ANALYTICAL

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Field ID: B-4: 1.5-2.0 Batch#: 347888 Prep: EPA 3546
Lab ID: 513507-008 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: MES
Basis: as received Prepared: 08/16/24
Diln Fac: 1.000 Analyzed: 08/18/24
513507-008 Analyte Result RL Units Qual
alpha-BHC ND 5.0 ug/Kg
beta-BHC ND 5.0 ug/Kg
gamma-BHC ND 5.0 ug/Kg
delta-BHC ND 5.0 ug/Kg
Heptachlor ND 5.0 ug/Kg
Aldrin ND 5.0 ug/Kg
Heptachlor epoxide ND 5.0 ug/Kg
Endosulfan I ND 5.0 ug/Kg
Dieldrin ND 5.0 ug/Kg
4,4'-DDE 77 5.0 ug/Kg #
Endrin ND 5.0 ug/Kg
Endosulfan II ND 5.0 ug/Kg
Endosulfan sulfate ND 5.0 ug/Kg
4,4'-DDD ND 5.0 ug/Kg
Endrin aldehyde ND 5.0 ug/Kg
Endrin ketone ND 5.0 ug/Kg
4,4'-DDT ND 5.0 ug/Kg
Methoxychlor ND 10 ug/Kg
Toxaphene ND 100 ug/Kg
Chlordane (Technical) ND 50 ug/Kg
513507-008 Surrogate %REC Limits
TCMX 82 23-120
Decachlorobiphenyl 94 24-120
Legend
#: CCV drift outside limits; average CCV drift within limits per method requirements
ND: Not Detected
RL: Reporting Limit
1 of 1 v47
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 36 of 71
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Field ID: B-5: 0.0-0.5 Batch#: 346998 Prep: EPA 3546
Lab ID: 513507-009 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: MES
Basis: as received Prepared: 08/06/24
513507-009 Analyte Result RL Units Diln Fac Analyzed
alpha-BHC ND 5.0 ug/Kg 1.000 08/07/24
beta-BHC ND 5.0 ug/Kg 1.000 08/07/24
gamma-BHC ND 5.0 ug/Kg 1.000 08/07/24
delta-BHC ND 5.0 ug/Kg 1.000 08/07/24
Heptachlor ND 5.0 ug/Kg 1.000 08/07/24
Aldrin ND 5.0 ug/Kg 1.000 08/07/24
Heptachlor epoxide ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan I ND 5.0 ug/Kg 1.000 08/07/24
Dieldrin ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDE 470 25 ug/Kg 5.000 08/08/24
Endrin ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan II ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan sulfate ND 5.3 ug/Kg 1.000 08/07/24
4,4'-DDD ND 5.0 ug/Kg 1.000 08/07/24
Endrin aldehyde ND 5.0 ug/Kg 1.000 08/07/24
Endrin ketone ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDT 62 5.0 ug/Kg 1.000 08/07/24
Methoxychlor ND 10 ug/Kg 1.000 08/07/24
Toxaphene 480 100 ug/Kg 1.000 08/07/24
Chlordane (Technical) ND 50 ug/Kg 1.000 08/07/24
513507-009 Surrogate %REC Limits Diln Fac Analyzed
TCMX 81 23-120 1.000 08/07/24
Decachlorobiphenyl 67 24-120 1.000 08/07/24
Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v35.001
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 37 of 71
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ANALYTICAL

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Field ID: B-6: 0.0-0.5 Batch#: 346998 Prep: EPA 3546
Lab ID: 513507-011 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: MES
Basis: as received Prepared: 08/06/24
513507-011 Analyte Result RL Units Diln Fac Analyzed Qual alpha-BHC ND 5.0 ug/Kg 1.000 08/07/24
beta-BHC ND 5.0 ug/Kg 1.000 08/07/24
gamma-BHC ND 5.0 ug/Kg 1.000 08/07/24
delta-BHC ND 5.0 ug/Kg 1.000 08/07/24
Heptachlor ND 5.0 ug/Kg 1.000 08/07/24
Aldrin 18 5.0 ug/Kg 1.000 08/07/24
Heptachlor epoxide ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan I ND 5.0 ug/Kg 1.000 08/07/24
Dieldrin ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDE 1,200 50 ug/Kg 10.00 08/08/24
Endrin ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan II ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan sulfate ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDD 19 5.0 ug/Kg 1.000 08/07/24 C
Endrin aldehyde ND 5.0 ug/Kg 1.000 08/07/24
Endrin ketone ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDT 230 5.0 ug/Kg 1.000 08/07/24
Methoxychlor ND 10 ug/Kg 1.000 08/07/24
Toxaphene 1,400 1,000 ug/Kg 10.00 08/08/24
Chlordane (Technical) ND 50 ug/Kg 1.000 08/07/24
513507-011 Surrogate %REC Limits Diln Fac Analyzed
TCMX 83 23-120 1.000 08/07/24
Decachlorobiphenyl 65 24-120 1.000 08/07/24
Legend
C: Presence confirmed, but RPD between columns exceeds 40% ND: Not Detected
RL: Reporting Limit
1 of 1 v36.001
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 38 of 71
HA .P

ANALYTICAL

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Field ID: B-6: 1.5-2.0 Batch#: 347888 Prep: EPA 3546
Lab ID: 513507-012 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: MES
Basis: as received Prepared: 08/16/24
Diln Fac: 1.000 Analyzed: 08/18/24
513507-012 Analyte Result RL Units Qual
alpha-BHC ND 4.9 ug/Kg
beta-BHC ND 4.9 ug/Kg
gamma-BHC ND 4.9 ug/Kg
delta-BHC ND 4.9 ug/Kg
Heptachlor ND 4.9 ug/Kg
Aldrin ND 4.9 ug/Kg
Heptachlor epoxide ND 4.9 ug/Kg
Endosulfan I ND 4.9 ug/Kg
Dieldrin ND 4.9 ug/Kg
4,4'-DDE 90 4.9 ug/Kg #
Endrin ND 4.9 ug/Kg
Endosulfan II ND 4.9 ug/Kg
Endosulfan sulfate ND 4.9 ug/Kg
4,4'-DDD ND 4.9 ug/Kg
Endrin aldehyde ND 4.9 ug/Kg
Endrin ketone ND 4.9 ug/Kg
4,4'-DDT ND 4.9 ug/Kg
Methoxychlor ND 9.8 ug/Kg
Toxaphene ND 98 ug/Kg
Chlordane (Technical) ND 49 ug/Kg
513507-012 Surrogate %REC Limits
TCMX 84 23-120
Decachlorobiphenyl 94 24-120
Legend
#: CCV drift outside limits; average CCV drift within limits per method requirements
ND: Not Detected
RL: Reporting Limit
1 of 1 v48
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 39 of 71
HA .P

ANALYTICAL

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Field ID: B-7: 0.0-0.5 Batch#: 346998 Prep: EPA 3546
Lab ID: 513507-013 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: BLB
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-013 Analyte Result RL Units Qual
alpha-BHC ND 5.0 ug/Kg
beta-BHC ND 5.0 ug/Kg
gamma-BHC ND 5.0 ug/Kg
delta-BHC ND 5.0 ug/Kg
Heptachlor ND 5.0 ug/Kg
Aldrin ND 5.0 ug/Kg
Heptachlor epoxide ND 5.0 ug/Kg
Endosulfan I ND 5.0 ug/Kg
Dieldrin ND 5.0 ug/Kg
4,4'-DDE 15 5.0 ug/Kg C
Endrin ND 5.0 ug/Kg
Endosulfan II ND 5.0 ug/Kg
Endosulfan sulfate ND 5.0 ug/Kg
4,4'-DDD ND 5.0 ug/Kg
Endrin aldehyde ND 5.0 ug/Kg
Endrin ketone ND 5.0 ug/Kg
4,4'-DDT ND 5.0 ug/Kg
Methoxychlor ND 9.9 ug/Kg
Toxaphene ND 99 ug/Kg
Chlordane (Technical) ND 50 ug/Kg
513507-013 Surrogate %REC Limits
TCMX 76 23-120
Decachlorobiphenyl 57 24-120
Legend
C: Presence confirmed, but RPD between columns exceeds 40% ND: Not Detected
RL: Reporting Limit
1 of 1 v37.002
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 40 of 71
HA .P

ANALYTICAL

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Field ID: B-8: 0.0-0.5 Batch#: 346998 Prep: EPA 3546
Lab ID: 513507-015 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: MES
Basis: as received Prepared: 08/06/24
513507-015 Analyte Result RL Units Diln Fac Analyzed Qual alpha-BHC ND 5.0 ug/Kg 1.000 08/07/24
beta-BHC ND 5.0 ug/Kg 1.000 08/07/24
gamma-BHC ND 5.0 ug/Kg 1.000 08/07/24
delta-BHC ND 5.0 ug/Kg 1.000 08/07/24
Heptachlor ND 5.0 ug/Kg 1.000 08/07/24
Aldrin ND 5.0 ug/Kg 1.000 08/07/24
Heptachlor epoxide ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan I ND 5.0 ug/Kg 1.000 08/07/24
Dieldrin ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDE 1,100 50 ug/Kg 10.00 08/08/24
Endrin ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan II ND 5.0 ug/Kg 1.000 08/07/24
Endosulfan sulfate ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDD 15 5.0 ug/Kg 1.000 08/07/24 C
Endrin aldehyde ND 5.0 ug/Kg 1.000 08/07/24
Endrin ketone ND 5.0 ug/Kg 1.000 08/07/24
4,4'-DDT 140 5.0 ug/Kg 1.000 08/07/24
Methoxychlor ND 9.9 ug/Kg 1.000 08/07/24
Toxaphene 770 99 ug/Kg 1.000 08/07/24
Chlordane (Technical) ND 50 ug/Kg 1.000 08/07/24
513507-015 Surrogate %REC Limits Diln Fac Analyzed
TCMX 88 23-120 1.000 08/07/24
Decachlorobiphenyl 74 24-120 1.000 08/07/24
Legend
C: Presence confirmed, but RPD between columns exceeds 40% ND: Not Detected
RL: Reporting Limit
1 of 1 v38.001
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 41 of 71
HA .P

ANALYTICAL

Page 1444 of 1860 ends

Field ID: B-8: 1.5-2.0 Batch#: 347888 Prep: EPA 3546
Lab ID: 513507-016 Sampled: 08/05/24 Analysis: EPA 8081A Matrix: Soil Received: 08/05/24 Analyst: MES
Basis: as received Prepared: 08/16/24
Diln Fac: 1.000 Analyzed: 08/18/24
513507-016 Analyte Result RL Units Qual
alpha-BHC ND 5.1 ug/Kg
beta-BHC ND 5.1 ug/Kg
gamma-BHC ND 5.1 ug/Kg
delta-BHC ND 5.1 ug/Kg
Heptachlor ND 5.1 ug/Kg
Aldrin ND 5.1 ug/Kg
Heptachlor epoxide ND 5.1 ug/Kg
Endosulfan I ND 5.1 ug/Kg
Dieldrin ND 5.1 ug/Kg
4,4'-DDE 28 5.1 ug/Kg #
Endrin ND 5.1 ug/Kg
Endosulfan II ND 5.1 ug/Kg
Endosulfan sulfate ND 5.1 ug/Kg
4,4'-DDD ND 5.1 ug/Kg
Endrin aldehyde ND 5.1 ug/Kg
Endrin ketone ND 5.1 ug/Kg
4,4'-DDT ND 5.1 ug/Kg
Methoxychlor ND 10 ug/Kg
Toxaphene ND 100 ug/Kg
Chlordane (Technical) ND 51 ug/Kg
513507-016 Surrogate %REC Limits
TCMX 80 23-120
Decachlorobiphenyl 93 24-120
Legend
#: CCV drift outside limits; average CCV drift within limits per method requirements
ND: Not Detected
RL: Reporting Limit
1 of 1 v49
Organochlorine Pesticides
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 42 of 71
HA .P

ANALYTICAL

Page 1445 of 1860 ends

Type: BLANK Batch#: 346998 Analysis: EPA 8081A
Lab ID: QC1175787 Prepared: 08/06/24 Analyst: MES
Matrix: Soil Analyzed: 08/07/24
Diln Fac: 1.000 Prep: EPA 3546
QC1175787 Analyte Result RL Units
alpha-BHC ND 4.9 ug/Kg
beta-BHC ND 4.9 ug/Kg
gamma-BHC ND 4.9 ug/Kg
delta-BHC ND 4.9 ug/Kg
Heptachlor ND 4.9 ug/Kg
Aldrin ND 4.9 ug/Kg
Heptachlor epoxide ND 4.9 ug/Kg
Endosulfan I ND 4.9 ug/Kg
Dieldrin ND 4.9 ug/Kg
4,4'-DDE ND 4.9 ug/Kg
Endrin ND 4.9 ug/Kg
Endosulfan II ND 4.9 ug/Kg
Endosulfan sulfate ND 4.9 ug/Kg
4,4'-DDD ND 4.9 ug/Kg
Endrin aldehyde ND 4.9 ug/Kg
Endrin ketone ND 4.9 ug/Kg
4,4'-DDT ND 4.9 ug/Kg
Methoxychlor ND 9.8 ug/Kg
Toxaphene ND 98 ug/Kg
Chlordane (Technical) ND 49 ug/Kg
QC1175787 Surrogate %REC Limits
TCMX 84 23-120
Decachlorobiphenyl 89 24-120
Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v39
Organochlorine Pesticides: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 43 of 71
HA .P

ANALYTICAL

Page 1446 of 1860 ends

Type: LCS Batch#: 346998 Analysis: EPA 8081A
Lab ID: QC1175788 Prepared: 08/06/24 Analyst: MES
Matrix: Soil Analyzed: 08/07/24
Diln Fac: 1.000 Prep: EPA 3546
QC1175788 Analyte Spiked Result %REC Limits Units
alpha-BHC 49.02 44.07 90 22-129 ug/Kg
beta-BHC 49.02 44.67 91 28-125 ug/Kg
gamma-BHC 49.02 44.29 90 22-128 ug/Kg
delta-BHC 49.02 46.80 95 24-131 ug/Kg
Heptachlor 49.02 41.53 85 18-124 ug/Kg
Aldrin 49.02 38.87 79 23-120 ug/Kg
Heptachlor epoxide 49.02 44.13 90 26-120 ug/Kg
Endosulfan I 49.02 46.50 95 25-126 ug/Kg
Dieldrin 49.02 46.90 96 23-124 ug/Kg
4,4'-DDE 49.02 46.25 94 28-121 ug/Kg
Endrin 49.02 44.14 90 25-127 ug/Kg
Endosulfan II 49.02 43.57 89 29-121 ug/Kg
Endosulfan sulfate 49.02 35.97 73 30-121 ug/Kg
4,4'-DDD 49.02 48.20 98 26-120 ug/Kg
Endrin aldehyde 49.02 28.70 59 10-120 ug/Kg
Endrin ketone 49.02 48.13 98 28-125 ug/Kg
4,4'-DDT 49.02 44.12 90 22-125 ug/Kg
Methoxychlor 49.02 50.76 104 28-130 ug/Kg
QC1175788 Surrogate %REC Limits
TCMX 87 23-120
Decachlorobiphenyl 94 24-120
1 of 1 v40
Organochlorine Pesticides: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 44 of 71
HA .P

ANALYTICAL

Page 1447 of 1860 ends

Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/06/24 Type: MS Diln Fac: 1.000 Analyzed: 08/07/24
MSS Lab ID: 513116-015 Batch#: 346998 Prep: EPA 3546
Lab ID: QC1175789 Sampled: 07/30/24 Analysis: EPA 8081A Matrix: Soil Received: 07/30/24 Analyst: MES
QC1175789 Analyte MSS Result Spiked Result %REC Limits Units alpha-BHC <2.330 50.00 44.46 89 46-120 ug/Kg
beta-BHC <2.591 50.00 43.92 88 41-120 ug/Kg
gamma-BHC <2.541 50.00 44.23 88 41-120 ug/Kg
delta-BHC <2.049 50.00 45.22 90 38-123 ug/Kg
Heptachlor 22.07 50.00 57.04 70 39-120 ug/Kg
Aldrin 11.39 50.00 47.30 72 34-120 ug/Kg
Heptachlor epoxide <2.518 50.00 35.07 70 43-120 ug/Kg
Endosulfan I <2.588 50.00 45.06 90 45-120 ug/Kg
Dieldrin 37.82 50.00 63.43 46 45-120 ug/Kg
4,4'-DDE 13.45 50.00 50.90 81 34-120 ug/Kg
Endrin <2.388 50.00 45.84 92 40-120 ug/Kg
Endosulfan II <2.539 50.00 45.58 91 41-120 ug/Kg
Endosulfan sulfate <5.269 50.00 38.55 77 42-120 ug/Kg
4,4'-DDD <1.963 50.00 77.19 154 * 41-120 ug/Kg
Endrin aldehyde <4.761 50.00 37.99 76 30-120 ug/Kg
Endrin ketone <2.551 50.00 48.47 97 45-120 ug/Kg
4,4'-DDT <2.652 50.00 50.31 101 35-127 ug/Kg
Methoxychlor <4.441 50.00 52.23 104 42-136 ug/Kg
QC1175789 Surrogate %REC Limits
TCMX 87 23-120
Decachlorobiphenyl 92 24-120
1 of 2 v41
Organochlorine Pesticides: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 45 of 71
HA .P

ANALYTICAL

Page 1448 of 1860 ends

Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/06/24 Type: MSD Diln Fac: 1.000 Analyzed: 08/07/24
MSS Lab ID: 513116-015 Batch#: 346998 Prep: EPA 3546
Lab ID: QC1175790 Sampled: 07/30/24 Analysis: EPA 8081A Matrix: Soil Received: 07/30/24 Analyst: MES
QC1175790 Analyte Spiked Result %REC Limits Units RPD Lim alpha-BHC 50.00 47.20 94 46-120 ug/Kg 6 30
beta-BHC 50.00 45.00 90 41-120 ug/Kg 2 30
gamma-BHC 50.00 46.81 94 41-120 ug/Kg 6 30
delta-BHC 50.00 47.09 94 38-123 ug/Kg 4 30
Heptachlor 50.00 67.46 91 39-120 ug/Kg 17 30
Aldrin 50.00 51.62 80 34-120 ug/Kg 9 30
Heptachlor epoxide 50.00 34.32 69 43-120 ug/Kg 2 30
Endosulfan I 50.00 45.77 92 45-120 ug/Kg 2 30
Dieldrin 50.00 81.78 83 45-120 ug/Kg 25 30
4,4'-DDE 50.00 53.31 86 34-120 ug/Kg 5 30
Endrin 50.00 47.16 94 40-120 ug/Kg 3 30
Endosulfan II 50.00 47.94 96 41-120 ug/Kg 5 30
Endosulfan sulfate 50.00 45.36 91 42-120 ug/Kg 16 30
4,4'-DDD 50.00 88.91 178 * 41-120 ug/Kg 14 30
Endrin aldehyde 50.00 41.02 82 30-120 ug/Kg 8 30
Endrin ketone 50.00 47.57 95 45-120 ug/Kg 2 30
4,4'-DDT 50.00 51.65 103 35-127 ug/Kg 3 30
Methoxychlor 50.00 53.51 107 42-136 ug/Kg 2 30
QC1175790 Surrogate %REC Limits
TCMX 92 23-120
Decachlorobiphenyl 91 24-120
Legend
*: Value is outside QC limits
RPD: Relative Percent
Difference
2 of 2 v41
Organochlorine Pesticides: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 46 of 71
HA .P

ANALYTICAL

Page 1449 of 1860 ends

Type: BLANK Batch#: 347888 Analysis: EPA 8081A
Lab ID: QC1178619 Prepared: 08/16/24 Analyst: MES
Matrix: Soil Analyzed: 08/17/24
Diln Fac: 1.000 Prep: EPA 3546
QC1178619 Analyte Result RL Units
alpha-BHC ND 4.9 ug/Kg
beta-BHC ND 4.9 ug/Kg
gamma-BHC ND 4.9 ug/Kg
delta-BHC ND 4.9 ug/Kg
Heptachlor ND 4.9 ug/Kg
Aldrin ND 4.9 ug/Kg
Heptachlor epoxide ND 4.9 ug/Kg
Endosulfan I ND 4.9 ug/Kg
Dieldrin ND 4.9 ug/Kg
4,4'-DDE ND 4.9 ug/Kg
Endrin ND 4.9 ug/Kg
Endosulfan II ND 4.9 ug/Kg
Endosulfan sulfate ND 4.9 ug/Kg
4,4'-DDD ND 4.9 ug/Kg
Endrin aldehyde ND 4.9 ug/Kg
Endrin ketone ND 4.9 ug/Kg
4,4'-DDT ND 4.9 ug/Kg
Methoxychlor ND 9.8 ug/Kg
Toxaphene ND 98 ug/Kg
Chlordane (Technical) ND 49 ug/Kg
QC1178619 Surrogate %REC Limits
TCMX 88 23-120
Decachlorobiphenyl 89 24-120
Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v50
Organochlorine Pesticides: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 47 of 71
HA .P

ANALYTICAL

Page 1450 of 1860 ends

Type: LCS Batch#: 347888 Analysis: EPA 8081A
Lab ID: QC1178622 Prepared: 08/16/24 Analyst: MES
Matrix: Soil Analyzed: 08/17/24
Diln Fac: 1.000 Prep: EPA 3546
QC1178622 Analyte Spiked Result %REC Limits Units
alpha-BHC 51.02 55.83 109 22-129 ug/Kg
beta-BHC 51.02 56.78 111 28-125 ug/Kg
gamma-BHC 51.02 53.47 105 22-128 ug/Kg
delta-BHC 51.02 54.41 107 24-131 ug/Kg
Heptachlor 51.02 53.10 104 18-124 ug/Kg
Aldrin 51.02 46.18 91 23-120 ug/Kg
Heptachlor epoxide 51.02 53.47 105 26-120 ug/Kg
Endosulfan I 51.02 55.91 110 25-126 ug/Kg
Dieldrin 51.02 56.64 111 23-124 ug/Kg
4,4'-DDE 51.02 57.49 113 28-121 ug/Kg
Endrin 51.02 59.23 116 25-127 ug/Kg
Endosulfan II 51.02 58.10 114 29-121 ug/Kg
Endosulfan sulfate 51.02 59.47 117 30-121 ug/Kg
4,4'-DDD 51.02 55.44 109 26-120 ug/Kg
Endrin aldehyde 51.02 20.35 40 10-120 ug/Kg
Endrin ketone 51.02 59.15 116 28-125 ug/Kg
4,4'-DDT 51.02 53.08 104 22-125 ug/Kg
Methoxychlor 51.02 56.46 111 28-130 ug/Kg
QC1178622 Surrogate %REC Limits
TCMX 91 23-120
Decachlorobiphenyl 94 24-120
1 of 1 v51
Organochlorine Pesticides: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 48 of 71
HA .P

ANALYTICAL

Page 1451 of 1860 ends

Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/16/24 Type: MS Diln Fac: 1.000 Analyzed: 08/18/24
MSS Lab ID: 514081-030 Batch#: 347888 Prep: EPA 3546
Lab ID: QC1178625 Sampled: 08/14/24 Analysis: EPA 8081A Matrix: Soil Received: 08/14/24 Analyst: MES
QC1178625 Analyte MSS Result Spiked Result %REC Limits Units alpha-BHC <2.353 51.02 50.06 98 46-120 ug/Kg
beta-BHC <2.617 51.02 51.97 102 41-120 ug/Kg
gamma-BHC <2.566 51.02 49.48 97 41-120 ug/Kg
delta-BHC <2.070 51.02 49.47 97 38-123 ug/Kg
Heptachlor <2.349 51.02 53.89 106 39-120 ug/Kg
Aldrin <2.477 51.02 47.95 94 34-120 ug/Kg
Heptachlor epoxide <2.544 51.02 49.38 97 43-120 ug/Kg
Endosulfan I <2.614 51.02 50.25 98 45-120 ug/Kg
Dieldrin 6.245 51.02 49.93 86 45-120 ug/Kg
4,4'-DDE <3.176 51.02 52.79 103 34-120 ug/Kg
Endrin <2.412 51.02 53.88 106 40-120 ug/Kg
Endosulfan II <2.564 51.02 54.08 106 41-120 ug/Kg
Endosulfan sulfate <2.185 51.02 54.85 108 42-120 ug/Kg
4,4'-DDD <1.983 51.02 53.00 104 41-120 ug/Kg
Endrin aldehyde <4.809 51.02 45.24 89 30-120 ug/Kg
Endrin ketone <2.577 51.02 53.99 106 45-120 ug/Kg
4,4'-DDT 3.465 51.02 58.04 107 35-127 ug/Kg
Methoxychlor <4.486 51.02 58.78 115 42-136 ug/Kg
QC1178625 Surrogate %REC Limits
TCMX 84 23-120
Decachlorobiphenyl 88 24-120
1 of 2 v52
Organochlorine Pesticides: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 49 of 71
HA .P

ANALYTICAL

Page 1452 of 1860 ends

Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/16/24 Type: MSD Diln Fac: 1.000 Analyzed: 08/18/24
MSS Lab ID: 514081-030 Batch#: 347888 Prep: EPA 3546
Lab ID: QC1178626 Sampled: 08/14/24 Analysis: EPA 8081A Matrix: Soil Received: 08/14/24 Analyst: MES
QC1178626 Analyte Spiked Result %REC Limits Units RPD Lim alpha-BHC 49.02 45.60 93 46-120 ug/Kg 5 30
beta-BHC 49.02 46.46 95 41-120 ug/Kg 7 30
gamma-BHC 49.02 44.79 91 41-120 ug/Kg 6 30
delta-BHC 49.02 44.93 92 38-123 ug/Kg 6 30
Heptachlor 49.02 44.46 91 39-120 ug/Kg 15 30
Aldrin 49.02 43.23 88 34-120 ug/Kg 6 30
Heptachlor epoxide 49.02 44.80 91 43-120 ug/Kg 6 30
Endosulfan I 49.02 46.22 94 45-120 ug/Kg 4 30
Dieldrin 49.02 45.29 80 45-120 ug/Kg 6 30
4,4'-DDE 49.02 47.64 97 34-120 ug/Kg 6 30
Endrin 49.02 48.58 99 40-120 ug/Kg 6 30
Endosulfan II 49.02 49.24 100 41-120 ug/Kg 5 30
Endosulfan sulfate 49.02 47.70 97 42-120 ug/Kg 10 30
4,4'-DDD 49.02 47.35 97 41-120 ug/Kg 7 30
Endrin aldehyde 49.02 45.29 92 30-120 ug/Kg 4 30
Endrin ketone 49.02 47.99 98 45-120 ug/Kg 8 30
4,4'-DDT 49.02 52.45 100 35-127 ug/Kg 6 30
Methoxychlor 49.02 51.67 105 42-136 ug/Kg 9 30
QC1178626 Surrogate %REC Limits
TCMX 79 23-120
Decachlorobiphenyl 79 24-120
Legend
RPD: Relative Percent
Difference
2 of 2 v52
Organochlorine Pesticides: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 50 of 71
HA .P

ANALYTICAL

Page 1453 of 1860 ends

Field ID: B-1: 0.5-1.0 Batch#: 347000 Prep: EPA 3050B
Lab ID: 513507-001 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-001 Analyte Result RL Units
Arsenic 8.4 0.95 mg/Kg
Legend
RL: Reporting Limit
1 of 1 v2
Metals Analytical Report
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 51 of 71
HA .P

ANALYTICAL

Page 1454 of 1860 ends

Field ID: B-2: 0.5-1.0 Batch#: 347000 Prep: EPA 3050B
Lab ID: 513507-003 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-003 Analyte Result RL Units
Arsenic 9.0 0.97 mg/Kg
Legend
RL: Reporting Limit
1 of 1 v3
Metals Analytical Report
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 52 of 71
HA .P

ANALYTICAL

Page 1455 of 1860 ends

Field ID: B-3: 0.0-0.5 Batch#: 347000 Prep: EPA 3050B
Lab ID: 513507-005 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-005 Analyte Result RL Units
Arsenic 9.8 1.0 mg/Kg
Legend
RL: Reporting Limit
1 of 1 v4
Metals Analytical Report
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 53 of 71
HA .P

ANALYTICAL

Page 1456 of 1860 ends

Field ID: B-4: 0.0-0.5 Batch#: 347000 Prep: EPA 3050B
Lab ID: 513507-007 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-007 Analyte Result RL Units
Arsenic 11 0.98 mg/Kg
Legend
RL: Reporting Limit
1 of 1 v5
Metals Analytical Report
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 54 of 71
HA .P

ANALYTICAL

Page 1457 of 1860 ends

Field ID: B-5: 0.0-0.5 Batch#: 347000 Prep: EPA 3050B
Lab ID: 513507-009 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-009 Analyte Result RL Units
Arsenic 10 0.99 mg/Kg
Legend
RL: Reporting Limit
1 of 1 v6
Metals Analytical Report
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 55 of 71
HA .P

ANALYTICAL

Page 1458 of 1860 ends

Field ID: B-6: 0.0-0.5 Batch#: 347000 Prep: EPA 3050B
Lab ID: 513507-011 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-011 Analyte Result RL Units
Arsenic 10 0.99 mg/Kg
Legend
RL: Reporting Limit
1 of 1 v7
Metals Analytical Report
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 56 of 71
HA .P

ANALYTICAL

Page 1459 of 1860 ends

Field ID: B-7: 0.0-0.5 Batch#: 347000 Prep: EPA 3050B
Lab ID: 513507-013 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-013 Analyte Result RL Units
Arsenic 9.5 0.97 mg/Kg
Legend
RL: Reporting Limit
1 of 1 v8
Metals Analytical Report
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 57 of 71
HA .P

ANALYTICAL

Page 1460 of 1860 ends

Field ID: B-8: 0.0-0.5 Batch#: 347000 Prep: EPA 3050B
Lab ID: 513507-015 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
Basis: as received Prepared: 08/06/24
Diln Fac: 1.000 Analyzed: 08/07/24
513507-015 Analyte Result RL Units
Arsenic 9.9 0.95 mg/Kg
Legend
RL: Reporting Limit
1 of 1 v9
Metals Analytical Report
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 58 of 71
HA .P

ANALYTICAL

Page 1461 of 1860 ends

Field ID: COMP-1 Basis: as received Received: 08/05/24
Lab ID: 513507-017 Diln Fac: 1.000
Matrix: Soil Sampled: 08/05/24
513507-017 Analyte Result RL Units Batch# Prepared Analyzed Prep Analysis Analyst Antimony ND 3.0 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Arsenic 10 0.99 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Barium 220 0.99 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Beryllium 0.63 0.50 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Cadmium ND 0.50 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Chromium 44 0.99 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Cobalt 13 0.50 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Copper 36 0.99 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Lead 10 0.99 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Mercury ND 0.15 mg/Kg 347106 08/07/24 08/08/24 METHOD EPA 7471A MLL Molybdenum ND 0.99 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Nickel 44 0.99 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Selenium ND 3.0 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Silver ND 0.50 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Thallium ND 3.0 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Vanadium 70 0.99 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Zinc 74 5.0 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v10.001
Metals Analytical Report
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 59 of 71
HA .P

ANALYTICAL

Page 1462 of 1860 ends

Field ID: COMP-2 Basis: as received Received: 08/05/24
Lab ID: 513507-018 Diln Fac: 1.000
Matrix: Soil Sampled: 08/05/24
513507-018 Analyte Result RL Units Batch# Prepared Analyzed Prep Analysis Analyst Antimony ND 2.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Arsenic 10 0.97 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Barium 260 0.97 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Beryllium 0.62 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Cadmium ND 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Chromium 59 0.97 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Cobalt 16 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Copper 46 0.97 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Lead 10 0.97 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Mercury ND 0.17 mg/Kg 347106 08/07/24 08/08/24 METHOD EPA 7471A MLL Molybdenum ND 0.97 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Nickel 62 0.97 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Selenium ND 2.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Silver ND 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Thallium ND 2.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Vanadium 84 0.97 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Zinc 76 4.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v11.001
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Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 60 of 71
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Field ID: COMP-3 Basis: as received Received: 08/05/24
Lab ID: 513507-019 Diln Fac: 1.000
Matrix: Soil Sampled: 08/05/24
513507-019 Analyte Result RL Units Batch# Prepared Analyzed Prep Analysis Analyst Antimony ND 2.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Arsenic 10 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Barium 270 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Beryllium 0.65 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Cadmium ND 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Chromium 59 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Cobalt 16 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Copper 46 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Lead 11 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Mercury ND 0.14 mg/Kg 347106 08/07/24 08/08/24 METHOD EPA 7471A MLL Molybdenum ND 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Nickel 60 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Selenium ND 2.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Silver ND 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Thallium ND 2.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Vanadium 85 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Zinc 82 4.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v12.001
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Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 61 of 71
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Field ID: COMP-4 Basis: as received Received: 08/05/24
Lab ID: 513507-020 Diln Fac: 1.000
Matrix: Soil Sampled: 08/05/24
513507-020 Analyte Result RL Units Batch# Prepared Analyzed Prep Analysis Analyst Antimony ND 2.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Arsenic 9.5 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Barium 260 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Beryllium 0.55 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Cadmium ND 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Chromium 59 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Cobalt 17 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Copper 46 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Lead 8.5 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Mercury 0.18 0.16 mg/Kg 347106 08/07/24 08/08/24 METHOD EPA 7471A MLL Molybdenum ND 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Nickel 65 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Selenium ND 2.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Silver ND 0.49 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Thallium ND 2.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Vanadium 73 0.98 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Zinc 72 4.9 mg/Kg 347000 08/06/24 08/07/24 EPA 3050B EPA 6010B DXC Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v13.001
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Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 62 of 71
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Type: BLANK Batch#: 347000 Analysis: EPA 6010B
Lab ID: QC1175764 Prepared: 08/06/24 Analyst: DXC
Matrix: Soil Analyzed: 08/07/24
Diln Fac: 1.000 Prep: EPA 3050B
QC1175764 Analyte Result RL Units
Antimony ND 3.0 mg/Kg
Arsenic ND 1.0 mg/Kg
Barium ND 1.0 mg/Kg
Beryllium ND 0.50 mg/Kg
Cadmium ND 0.50 mg/Kg
Chromium ND 1.0 mg/Kg
Cobalt ND 0.50 mg/Kg
Copper ND 1.0 mg/Kg
Lead ND 1.0 mg/Kg
Molybdenum ND 1.0 mg/Kg
Nickel ND 1.0 mg/Kg
Selenium ND 3.0 mg/Kg
Silver ND 0.50 mg/Kg
Thallium ND 3.0 mg/Kg
Vanadium ND 1.0 mg/Kg
Zinc ND 5.0 mg/Kg
Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v14
Metals Analytical Report: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 63 of 71
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Type: LCS Batch#: 347000 Analysis: EPA 6010B
Lab ID: QC1175765 Prepared: 08/06/24 Analyst: DXC
Matrix: Soil Analyzed: 08/07/24
Diln Fac: 1.000 Prep: EPA 3050B
QC1175765 Analyte Spiked Result %REC Limits Units Qual
Antimony 100.0 99.67 100 80-120 mg/Kg
Arsenic 100.0 103.8 104 80-120 mg/Kg
Barium 100.0 105.6 106 80-120 mg/Kg
Beryllium 100.0 106.3 106 80-120 mg/Kg
Cadmium 100.0 106.1 106 80-120 mg/Kg
Chromium 100.0 103.2 103 80-120 mg/Kg
Cobalt 100.0 111.6 112 80-120 mg/Kg
Copper 100.0 102.0 102 80-120 mg/Kg
Lead 100.0 110.1 110 80-120 mg/Kg
Molybdenum 100.0 103.2 103 80-120 mg/Kg
Nickel 100.0 110.2 110 80-120 mg/Kg
Selenium 100.0 101.2 101 80-120 mg/Kg b
Silver 50.00 48.31 97 80-120 mg/Kg
Thallium 100.0 112.4 112 80-120 mg/Kg
Vanadium 100.0 103.4 103 80-120 mg/Kg
Zinc 100.0 107.6 108 80-120 mg/Kg
Legend
b: See narrative
1 of 1 v15
Metals Analytical Report: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 64 of 71
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Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/06/24 Type: MS Diln Fac: 1.000 Analyzed: 08/07/24
MSS Lab ID: 513455-001 Batch#: 347000 Prep: EPA 3050B
Lab ID: QC1175766 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
QC1175766 Analyte MSS Result Spiked Result %REC Limits Units Qual Antimony <1.173 98.04 24.08 25 * 75-125 mg/Kg
Arsenic 5.470 98.04 97.16 94 75-125 mg/Kg
Barium 175.2 98.04 287.6 115 75-125 mg/Kg
Beryllium 0.4388 98.04 98.09 100 75-125 mg/Kg
Cadmium 0.3798 98.04 94.01 96 75-125 mg/Kg
Chromium 36.14 98.04 131.4 97 75-125 mg/Kg
Cobalt 15.30 98.04 113.2 100 75-125 mg/Kg
Copper 14.29 98.04 113.6 101 75-125 mg/Kg
Lead 9.453 98.04 105.1 98 75-125 mg/Kg
Molybdenum 0.6001 98.04 82.45 83 75-125 mg/Kg
Nickel 23.54 98.04 119.4 98 75-125 mg/Kg
Selenium <0.8806 98.04 90.92 93 75-125 mg/Kg b
Silver <0.1710 49.02 40.59 83 75-125 mg/Kg
Thallium <0.9298 98.04 97.28 99 75-125 mg/Kg
Vanadium 62.33 98.04 161.3 101 75-125 mg/Kg
Zinc 46.96 98.04 143.6 99 75-125 mg/Kg
Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/06/24 Type: MSD Diln Fac: 1.000 Analyzed: 08/07/24
MSS Lab ID: 513455-001 Batch#: 347000 Prep: EPA 3050B
Lab ID: QC1175767 Sampled: 08/05/24 Analysis: EPA 6010B Matrix: Soil Received: 08/05/24 Analyst: DXC
QC1175767 Analyte Spiked Result %REC Limits Units RPD Lim Qual Antimony 98.04 22.95 23 * 75-125 mg/Kg 5 41
Arsenic 98.04 96.84 93 75-125 mg/Kg 0 35
Barium 98.04 284.4 111 75-125 mg/Kg 1 20
Beryllium 98.04 97.84 99 75-125 mg/Kg 0 20
Cadmium 98.04 93.83 95 75-125 mg/Kg 0 20
Chromium 98.04 130.6 96 75-125 mg/Kg 1 20
Cobalt 98.04 113.4 100 75-125 mg/Kg 0 20
Copper 98.04 113.5 101 75-125 mg/Kg 0 20
Lead 98.04 105.3 98 75-125 mg/Kg 0 20
Molybdenum 98.04 83.11 84 75-125 mg/Kg 1 20
Nickel 98.04 118.5 97 75-125 mg/Kg 1 20
Selenium 98.04 90.32 92 75-125 mg/Kg 1 20 b
Silver 49.02 39.90 81 75-125 mg/Kg 2 20
Thallium 98.04 97.24 99 75-125 mg/Kg 0 20
Vanadium 98.04 158.6 98 75-125 mg/Kg 2 20
Zinc 98.04 140.0 95 75-125 mg/Kg 2 20
Legend
*: Value is outside QC limits
RPD: Relative Percent
Difference
b: See narrative
1 of 1 v16
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Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 65 of 71
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Field ID: ZZZZZZZZZZ Basis: as received Analyzed: 08/07/24 Type: Post Digest Spike Diln Fac: 1.000 Prep: EPA 3050B MSS Lab ID: 513455-001 Batch#: 347000 Analysis: EPA 6010B Lab ID: QC1175768 Sampled: 08/05/24 Analyst: DXC
Matrix: Soil Received: 08/05/24
QC1175768 Analyte MSS Result Spiked Result %REC Limits Units Qual Antimony <1.173 98.04 95.63 98 75-125 mg/Kg
Arsenic 5.470 98.04 103.6 100 75-125 mg/Kg
Barium 175.2 98.04 273.0 100 75-125 mg/Kg
Beryllium 0.4388 98.04 99.87 101 75-125 mg/Kg
Cadmium 0.3798 98.04 95.85 97 75-125 mg/Kg
Chromium 36.14 98.04 129.7 95 75-125 mg/Kg
Cobalt 15.30 98.04 115.0 102 75-125 mg/Kg
Copper 14.29 98.04 115.8 104 75-125 mg/Kg
Lead 9.453 98.04 108.2 101 75-125 mg/Kg
Molybdenum 0.6001 98.04 97.36 99 75-125 mg/Kg
Nickel 23.54 98.04 120.8 99 75-125 mg/Kg
Selenium <0.8806 98.04 98.26 100 75-125 mg/Kg b
Silver <0.1710 49.02 47.91 98 75-125 mg/Kg
Thallium <0.9298 98.04 99.00 101 75-125 mg/Kg
Vanadium 62.33 98.04 157.1 97 75-125 mg/Kg
Zinc 46.96 98.04 142.0 97 75-125 mg/Kg
Legend
b: See narrative
1 of 1 v17
Metals Analytical Report: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 66 of 71
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Type: BLANK Batch#: 347106 Analysis: EPA 7471A
Lab ID: QC1176115 Prepared: 08/07/24 Analyst: MLL
Matrix: Soil Analyzed: 08/08/24
Diln Fac: 1.000 Prep: METHOD
QC1176115 Analyte Result RL Units
Mercury ND 0.14 mg/Kg
Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v18
Metals Analytical Report: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 67 of 71
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Type: LCS Batch#: 347106 Analysis: EPA 7471A
Lab ID: QC1176116 Prepared: 08/07/24 Analyst: MLL
Matrix: Soil Analyzed: 08/08/24
Diln Fac: 1.000 Prep: METHOD
QC1176116 Analyte Spiked Result %REC Limits Units
Mercury 0.8333 0.8671 104 80-120 mg/Kg
1 of 1 v19
Metals Analytical Report: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 68 of 71
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Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/07/24 Type: MS Diln Fac: 1.000 Analyzed: 08/08/24
MSS Lab ID: 513514-001 Batch#: 347106 Prep: METHOD
Lab ID: QC1176117 Sampled: 08/05/24 Analysis: EPA 7471A Matrix: Soil Received: 08/05/24 Analyst: MLL
QC1176117 Analyte MSS Result Spiked Result %REC Limits Units Mercury <0.05591 0.8621 0.9503 110 75-125 mg/Kg
Field ID: ZZZZZZZZZZ Basis: as received Prepared: 08/07/24 Type: MSD Diln Fac: 1.000 Analyzed: 08/08/24
MSS Lab ID: 513514-001 Batch#: 347106 Prep: METHOD
Lab ID: QC1176118 Sampled: 08/05/24 Analysis: EPA 7471A Matrix: Soil Received: 08/05/24 Analyst: MLL
QC1176118 Analyte Spiked Result %REC Limits Units RPD Lim Mercury 0.9091 0.9830 108 75-125 mg/Kg 2 20
Legend
RPD: Relative Percent
Difference
1 of 1 v20
Metals Analytical Report: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 69 of 71
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Field ID: COMP-2 Batch#: 347821 Prep: METHOD
Type: SAMPLE Sampled: 08/05/24 Analysis: EPA 6010B
Lab ID: 513507-018 Received: 08/05/24 Analyst: SBW
Matrix: WET Leachate Prepared: 08/15/24
Diln Fac: 1.000 Analyzed: 08/15/24
513507-018 Analyte Result RL Units
Chromium ND 0.30 mg/L
Field ID: COMP-3 Batch#: 347821 Prep: METHOD
Type: SAMPLE Sampled: 08/05/24 Analysis: EPA 6010B
Lab ID: 513507-019 Received: 08/05/24 Analyst: SBW
Matrix: WET Leachate Prepared: 08/15/24
Diln Fac: 1.000 Analyzed: 08/15/24
513507-019 Analyte Result RL Units
Chromium ND 0.30 mg/L
Field ID: COMP-4 Batch#: 347821 Prep: METHOD
Type: SAMPLE Sampled: 08/05/24 Analysis: EPA 6010B
Lab ID: 513507-020 Received: 08/05/24 Analyst: SBW
Matrix: WET Leachate Prepared: 08/15/24
Diln Fac: 1.000 Analyzed: 08/15/24
513507-020 Analyte Result RL Units
Chromium ND 0.30 mg/L
Type: BLANK Batch#: 347821 Analysis: EPA 6010B
Lab ID: QC1178382 Prepared: 08/15/24 Analyst: SBW
Matrix: WET Leachate Analyzed: 08/15/24
Diln Fac: 1.000 Prep: METHOD
QC1178382 Analyte Result RL Units
Chromium ND 0.30 mg/L
Legend
ND: Not Detected
RL: Reporting Limit
1 of 1 v45
Chromium
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 70 of 71
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Type: BS Batch#: 347821 Analysis: EPA 6010B
Lab ID: QC1178383 Prepared: 08/15/24 Analyst: SBW
Matrix: WET Leachate Analyzed: 08/15/24
Diln Fac: 1.000 Prep: METHOD
QC1178383 Analyte Spiked Result %REC Limits Units
Chromium 4.000 3.858 96 80-120 mg/L
Type: BSD Batch#: 347821 Analysis: EPA 6010B
Lab ID: QC1178384 Prepared: 08/15/24 Analyst: SBW
Matrix: WET Leachate Analyzed: 08/15/24
Diln Fac: 1.000 Prep: METHOD
QC1178384 Analyte Spiked Result %REC Limits Units RPD Lim Chromium 4.000 3.825 96 80-120 mg/L 1 20
Legend
RPD: Relative Percent
Difference
1 of 1 v46
Chromium: Batch QC
Lab #: 513507 Project#: 24201-01
Client: Baseline Environmental Location: East County Service Center 71 of 71
HA .P

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APPENDIX F

ASTM PHASE I USER QUESTIONNAIRE

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ASTM PHASE I USER QUESTIONNAIRE
User: Shravan Sundaram Title: Environmental Analyst II Date: 11/26/2024 In order to qualify for one of the Landowner Liability Protections (LLPs) offered by the Small Business Liability Relief and Brownfields Revitalization Act of 2001 (the “Brownfields Amendments”), the user must provide the following information (if available) to the environmental professional. Failure to provide this information could result in a determination that “all appropriate inquiry” is not complete.
(1) Environmental cleanup liens that are filed or recorded against the site (40 CFR 312.25).

Are you aware of any environmental cleanup liens against the property that are filed or recorded under federal, tribal, state or local law?
No, based on EnviroStor and GeoTracker database queries, there are no known cleanup liens against the property that are filed or recorded under federal, tribal, state, or local law. (2) Activity and land use limitations that are in place on the site or that have been filed or recorded in a registry (40 CFR 312.26).

Are you aware of any AULs, such as engineering controls, land use restrictions or institutional controls that are in place at the site and/or have been filed or recorded in a registry under federal, tribal, state or local law? We are not aware of any AUL’s that are in place at the site and/or have been filed or recorded in a registry under federal, tribal, state or local law.
(3) Specialized knowledge or experience of the person seeking to qualify for the LLP (40 CFR 312.28).

As the user of this ESA do you have any specialized knowledge or experience related to the property or nearby properties? For example, are you involved in the same line of business as the current or former occupants of the property or an adjoining property so that you would have specialized knowledge of the chemicals and processes used by this type of business?
The Phase II conducted for the six County-owned parcels directly north of this parcel identified organochloride pesticides at the southern portion of the parcels that will require special disposal for compliance with the California Hazardous Waste requirements. Considering this entire area has historic agricultural use, this parcel also may have organochloride pesticide presence.
(4) Relationship of the purchase price to the fair market value of the property if it were not contaminated (40 CFR 312.29).

Does the purchase price being paid for this property reasonably reflect the fair market value of the property? If you conclude that there is a difference, have you considered whether the lower purchase price is because contamination is known or believed to be present at the property?
The County has not agreed to purchase this property yet. So there is no purchase price established yet. However, if it is found that the property has contamination, the County’s offer will reflect this fact. (5) Commonly known or reasonably ascertainable information about the property (40 CFR 312.30).

Are you aware of commonly known or reasonably ascertainable information about the property that would help the environmental professional to identify conditions indicative of releases or threatened releases? For example, as user, (a.) Do you know the past uses of the property?
Based on historic aerials, agricultural use.
(b.) Do you know of specific chemicals that are present or once were present at the property? No, although organochloride pesticide presence is suspected.

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(c.) Do you know of spills or other chemical releases that have taken place at the property? No.
(d.) Do you know of any environmental cleanups that have taken place at the property?

No.
(6) The degree of obviousness of the presence of likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation (40 CFR 312.31).

As the user of this ESA, based on your knowledge and experience related to the property are there any obvious indicators that point to the presence or likely presence of contamination at the property? Historic aerials show agricultural uses at the property. Therefore, there may be potential for organochloride pesticide presence on-site.

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APPENDIX G

QUALIFICATIONS OF PREPARERS

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Johnathan Rizzo‐Mosbaugh
Environmental Scientist
Project Experience
I‐880 Interchange Improvement Project. Obtained necessary permits, collected soil and groundwater samples, and prepared a Preliminary Site Investigation Report to evaluate contaminants of potential concern, including ADL.

Port of Oakland, Contaminated Properties Mapping. Compiled regulatory database information regarding hazardous materials release sites on all properties owned by the Port of Oakland and mapped the extent of soil and groundwater contamination using GIS. An information table and many detailed figures were created to support the Port of Oakland’s environmental review and compliance efforts for future infrastructure and development projects.

Caulfield Bridge, Petaluma, Phase I ESA. Prepared a Phase I ESA to evaluate the potential for subsurface contamination at a proposed bridge site. The environmental concerns identified included undocumented fill, nearby former petroleum storage facilities, and former operational facilities of a quarry at the site.

Port of Oakland, RMP 167B Investigation. Performed soil sampling to evaluate the extent of soil containing very high levels of lead which classify the soil as federal hazardous waste. 11th & Natoma Park, San Francisco, Phase II ESA. Performed soil and soil vapor sampling at multiple commercial properties which are proposed to be redeveloped by the City of San Francisco into a park. 5801 Christie Avenue, Emeryville, CEQA Review. Performed geology, hydrology, and hazardous materials analysis of a proposed project that would involve excavation and deep foundations through unstable and contaminated soil.

Johnathan Rizzo‐Mosbaugh is an Environmental Scientist with a focus on environmental planning and policy. His experience at Baseline has included analysis of geology, hydrology, and hazardous materials impacts under CEQA, environmental permitting, Phase I/II Environmental Site Assessments (ESAs), data compilation and analysis, and reporting. He has completed detailed Geographical Information System (GIS) mapping of soil and groundwater contamination for the Port of Oakland. He also has experience collecting soil, groundwater, and soil vapor samples following regulatory guidelines.

His environmental science education covered a variety of planning topics, including information on government planning agencies, conflict resolution, ecology, GIS, CEQA/NEPA, environmental law, and a broad range of scientific disciplines. As described below, he completed many projects during his education, including preparation of a hypothetical Environmental Impact Report for relocating a small northern California seaside town due to the effects of climate change.

Johnathan’s capstone project at Cal Poly Humbolt was the final project required to complete his degree and thus was a culmination of his education. During the capstone project he worked with the City of Eureka and lead a team of his fellow students to help inform the City about the potential of using tiny houses on wheels as a low‐income housing option. During this capstone project he collected best practices from other government entities, created draft policies that better fit the City’s need, wrote a report about the topic, and presented the findings to the City of Eureka Commission during a public meeting. Due to his work on this project the City of Eureka added policies for tiny houses on wheels to its zoning code.

Areas of Expertise
Ecology, Geology, Hazardous Materials
Management, Mitigation Monitoring
and Compliance, Environmental
Planning and Policy.

Education
B.A., Environmental Science and
Management, Cal Poly Humboldt
Registrations/Certifications
24‐hour OSHA training.

Years of Experience
2 Years

BASELINE

ENVIRONMENTAL CONSULTING

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Patrick Sutton, P.E.

Principal Environmental Engineer
Areas of Expertise
Hazardous Materials, Air Quality,
GHGs, Noise, Geology, and Hydrology
Education
M.S., Civil and Environmental
Engineering, University of
California – Davis
B.S., Environmental Science,
Dickinson College
Registration
Professional Engineer No. 13609 (RI)
Years of Experience
20 Years
Patrick Sutton is an environmental engineer who specializes in the assessment of hazardous materials released into the environment.

Mr. Sutton prepares technical reports in support of environmental review, such as Phase I/II Environmental Site Assessments, Air Quality Reports, and Health Risk Assessments. His proficiency in a wide range of modeling software (AERMOD, CalEEMod, CT-EMFAC) as well as relational databases, GIS, and graphics design allows him to thoroughly and efficiently assess and mitigate environmental concerns.

Mr. Sutton has prepared numerous Phase II Environmental Investigation reports for large infrastructure improvement projects, such as the Freight Intelligent Transportation System (FITS) Project at the Port of Oakland. Hazardous materials investigations include sampling and statistically analysis (as applicable) of contaminants of concern in soil, soil gas, and groundwater.

Mr. Sutton has managed state-funded and privately-financed soil and groundwater remediation projects related to gas stations, landfills, drycleaners, railroads, and other industrial properties impacted by hazardous materials releases. As a current member of ASTM, he is the author and technical advisor for the low-flow purging and sampling standard commonly applied during environmental investigations.

Through his work associated with assessing, investigating, and remediating hazardous materials in the environment, he has developed an excellent perspective on how to satisfy both regulatory and technical requirements to properly manage hazardous materials and air quality concerns.

Project Experience
Port of Oakland and Alameda CTC, Freight Intelligent Transportation System (FITS) Project, 2018-2020. Project manager for preparation of an Initial Site Assessment (ISA), Preliminary Site Investigation (PSI), and Construction Risk Management Plan (CRMP) to pre-characterize soils and groundwater for disposal and/or reuse, and to inform prospective contractors of soil management requirements and health and safety protocols. The ISA, PSI, and CRMP were reviewed and approved by DTSC, Port of Oakland, and Alameda CTC.

Port of Oakland and Alameda CTC, 7th Street Grade Separation West Project, 2017-2018. Project manager for preparation of an Initial Site Assessment (ISA) to identify contaminants of potential concern in soil and groundwater.

The ISA was reviewed and approved by Port of Oakland and Alameda CTC.

Alameda CTC, I-680 Highway Improvement Projects, 2013-2020. Project manager for multiple Phase I Initial Site Assessments (ISAs) and Phase II Preliminary Site Investigations (PSIs) for over 24 miles of proposed highway improvement projects along the I-680 corridor from Milpitas to Dublin. Oversaw the collection and analysis of soil and groundwater samples from over 600 borings to characterize wastes for off-site disposal and determine how to maximize on-site soils reuse while minimizing soil handling for each of the proposed highway improvement projects.

San Francisco Public Works, Muni Metro East Maintenance Project, 2021-2022. Project manager for preparation of a Phase II Environmental Site Investigation to evaluate potential soil vapor intrusion concerns and characterize the chemical quality of soil and groundwater that would be disturbed during construction.

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ENVIRONMENTAL CONSULTING

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1 24201‐01 Phase II ESA Southern Site.fnl
10 February 2025
24201‐01
Shravan Sundaram
County Project Manager
Environmental Services Division
Contra Costa County Public Works Department
255 Glacier Drive
Martinez, CA  94553
Subject: Phase II Environmental Site Assessment, Proposed East County Service Center Southern Property, Assessor’s Parcel Number 016‐120‐024, Contra Costa County Project # WH429A, Brentwood, California
Dear Mr. Sundaram:

Baseline has prepared this Phase II Environmental Site Assessment (ESA) to document the soil sampling and analysis performed at the approximately 5‐acre property identified by Assessor’s Parcel Number 016‐120‐024 (Site), located approximately 145 feet southwest from the intersection of Brentwood Boulevard and Technology Way in the City of Brentwood, California (Figure 1).

BACKGROUND
We understand that Contra Costa County (County) is considering purchasing the Site to expand the footprint of the Proposed East County Service Center (project) which is planned to be constructed on the northern adjacent County owned parcels. Baseline previously prepared a Phase I ESA for the Site, dated 15 January 2025, which identified the potential for soil contamination from arsenic and organochlorine pesticides (OCPs) to be present at the Site based on the historical agricultural use of the Site. The purpose of the Phase II ESA was to characterize the chemical quality of shallow soil at the Site and to compare the analytical results to published health‐based screening values for construction workers and for commercial/industrial direct exposure under the assumption that the future land use is a commercial building, and to compare analytical results to hazardous waste disposal thresholds.

SAMPLING AND ANALYSIS ACTIVITIES
On 8 January 2025, Baseline performed soil sampling activities at the Site. Ten borings (B‐9 through B‐18) were advanced to approximately 2 feet below ground surface (bgs) at the r.:CI BASEI-INE .... ENVIRONMENTAL CONSULTING

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2 24201‐01 Phase II ESA Southern Site.fnl‐2/10/25
locations shown on Figure 1. Soil samples were collected from depths of approximately 0.0 to

0.5 feet bgs (at the soil surface) and 1.5 to 2.0 feet bgs in each boring. The samples collected from the same depths in 3 to 4 adjacent borings were composited by the laboratory into composite samples for analysis of select constituents, as described under Laboratory Analysis below. A total of 6 composite samples (COMP‐5 through COMP‐10) were generated. Samples from borings B‐9 through B‐12 (in the western portion of the Site) were composited together, samples from borings B‐13 through B‐15 (in the central portion of the Site) were composited together, and samples from borings B‐16 through B‐18 (in the eastern portion of the Site) were composited together. Samples COMP‐5, COMP‐7, and COMP‐9 represent surface soil from the western, central, and eastern portions, respectively, of the Site. Samples COMP‐6, COMP‐8 and COMP‐10 represent slightly deeper soil (from approximately 1.5 to 2.0 feet bgs) from the western, central, and eastern portions, respectively, of the Site. The surface soil samples from each boring were also analyzed discretely for arsenic and OCPs, and the deeper samples were analyzed discretely for OCPs, as described under Laboratory Analysis below.

Sampling Methods
All borings were advanced using a hand auger. Samples were collected from the desired depths by transferring soil cuttings from the hand auger into laboratory supplied glass jars. Samples were sealed, labeled with the project name, date and time of sample collection, sampler’s initials, and unique sample identification, placed in a cooler containing ice, and transported to a State‐certified analytical laboratory under chain‐of‐custody procedures. Excess soil cuttings were used to backfill the borings.

Laboratory Analysis
The surface samples from all borings were analyzed for OCPs by Environmental Protection Agency (EPA) Method 8081 and arsenic by EPA Methods 6010B. The deeper samples from all borings were also analyzed for OCPs based on the detection of elevated concentrations of OCPs (with respect to hazardous waste thresholds) in the surface samples from most borings, as discussed further under Analytical Results, below. All six composite samples were analyzed for Title 22 metals by EPA Methods 6010B and 7471A; total petroleum hydrocarbons (TPH) as gasoline (TPHg), diesel (TPHd), and motor oil (TPHmo) by EPA Method 8015B; and volatile organic compounds (VOCs) by EPA Method 8260B.

Based on the total chromium concentrations in all composite samples, analysis of soluble chromium was performed on these samples using the Waste Extraction Test (WET) Method for waste classification purpose.

ANALYTICAL RESULTS
The laboratory analytical results are discussed below, and the laboratory report is provided in Appendix A. Analytical results for metals are presented in Table 1, and analytical results for

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3 24201‐01 Phase II ESA Southern Site.fnl‐2/10/25
OCPs are presented in Table 2. Concentrations of all other analytes including TPHg, TPHd, TPHmo, and VOCs are not presented in tables or discussed further below as these analytes were not detected above laboratory reporting limits.

The analytical results presented in Tables 1 and 2 are compared to the Environmental Screening Levels (ESLs) for construction worker direct exposure (Construction Worker ESLs) and commercial/industrial direct exposure (Commercial ESLs) established by the San Francisco Bay Regional Water Quality Control Board (Regional Water Board);1 naturally occurring background concentrations for metals; and hazardous waste criteria as defined in California Code of Regulations Title 22, including: comparison of concentrations to Total Threshold Limit Concentrations (TTLCs), Solubility Threshold Limit Concentrations (STLCs), Toxicity Characteristic Leaching Procedure (TCLP) thresholds, and trigger levels for soluble metals testing by the WET and TCLP methods.

Metals
Concentrations of arsenic ranging from 7.8 to 9.0 mg/kg were detected in all of the samples analyzed. The detected concentrations of arsenic exceed the Construction Worker ESL of 0.98 mg/kg and Commercial ESL of 0.31 mg/kg (Table 1). Naturally occurring background concentrations of arsenic commonly exceed ESLs. A master’s thesis document2 previously provided as supplemental information on the Regional Water Board’s website for ESLs indicates that the proposed upper estimate for background arsenic (99th percentile) within undifferentiated flatland soil of the San Francisco Bay Area is 11 mg/kg. Considering that the arsenic concentrations detected in samples from multiple depths across the Site were relatively consistent and were below the established background arsenic level of 11 mg/kg, it appears that the detected levels of arsenic in soil at the Site are naturally occurring.

Concentrations of total chromium ranging from 57 to 63 mg/kg were detected in all six of the composite samples. The total chromium concentrations exceeded the trigger level for WET Method analysis of 50 mg/kg (10 times the STLC of 5 milligrams per liter) in all composite samples. Concentrations of soluble chromium analyzed by the WET Method were not detected above the laboratory reporting limit in any of the composite samples.

Concentrations of all other metals analyzed were either not detected above the laboratory reporting limits or were detected at concentrations below Construction Worker ESLs, 1 Regional Water Board, 2019. Environmental Screening Levels, January.   2 Duverge, Dylan, 2011. Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Region, December. Available at:
https://www.waterboards.ca.gov/sanfranciscobay/water_issues/available_documents/2011_Arsenic_Background _Duverge.pdf

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4 24201‐01 Phase II ESA Southern Site.fnl‐2/10/25
Commercial ESLs, solubility testing (WET and TCLP) trigger levels, and hazardous waste thresholds.

Organochlorine Pesticides
Concentration of OCPs including 4,4'‐DDD, 4,4'‐DDE, 4,4'‐DDT, and dieldrin were detected in the soil samples analyzed (Table 2). The detected concentrations of OCPs were below their respective Commercial ESLs and Construction Worker ESLs. Concentrations of 4,4'‐DDE which equal or exceed the TTLC of 1,000 micrograms per kilogram (µg/kg) were detected in samples B‐11:0.0‐0.5 (1,100 µg/kg), B‐13:0.0‐0.5 (1,200 µg/kg), and B‐15:0.0‐0.5 (1,100 µg/kg). The TTLC of 1,000 µg/kg also applies to the combined concentrations of 4,4'‐DDD, 4,4'‐DDE, and 4,4'‐ DDT; and was exceeded in all of the surface samples except sample B‐17:0.0‐0.5 (877 µg/kg), which was slightly below the TTLC.  The combined concentrations of 4,4'‐DDD, 4,4'‐DDE, and 4,4'‐DDT in the other surface samples were 1,001 µg/kg in sample B‐9:0.0‐0.5, 1,255 µg/kg in sample B‐10:0.0‐0.5, 1,427 µg/kg in sample B‐11:0.0‐0.5, 1,026 µg/kg in sample B‐12:0.0‐0.5, 1,548 µg/kg in sample B‐13:0.0‐0.5, 1,155 µg/kg in sample B‐14:0.0‐0.5, 1,522 µg/kg in sample B‐15:0.0‐0.5, 1,258 µg/kg in sample B‐16:0.0‐0.5, and 1,282 µg/kg in sample B‐18:0.0‐0.5.

The detected concentrations of OCPs in all of the deeper samples were well below hazardous waste thresholds with the exception of the combined concentrations of 4,4'‐DDD, 4,4'‐DDE, and 4,4'‐DDT in sample B‐16:1.5‐2.0 (870 µg/kg), which was slightly below the TTLC of 1,000 µg/kg.

CONCLUSIONS AND RECOMMENDATIONS
Based on the findings discussed above, Baseline provides the following conclusions and recommendations regarding the chemical characterization of shallow soils for human health exposure and off‐site disposal.

Comparison to Commercial ESLs and Construction Worker ESLs The detected concentrations of arsenic exceed the Commercial ESL and Construction Worker ESL; however, the arsenic concentrations appear to be naturally occurring background levels.

No specific handling or disposal requirements are recommended based on the arsenic concentrations other than notifying the project contractor of the Phase II ESA findings so that they can ensure that their workers have appropriate training and take appropriate health and safety precautions. Assuming the Site is developed with no exposed soil surfaces remaining, there would be no risk of exposure to arsenic in soil for future occupants of the Site. No other analytical results exceeded the Commercial and Construction Worker ESLs.

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5 24201‐01 Phase II ESA Southern Site.fnl‐2/10/25
Waste Classifications for Soil Disposal and Re‐Use
Soil excavated from the surface of the Site to a depth of 1.5 feet bgs should be classified as California‐hazardous (or non‐RCRA hazardous3) waste for off‐Site disposal purposes based on the analytical results for OCPs (concentrations of 4,4'‐DDE and the combined concentrations of 4,4'‐DDE, 4,4'‐DDD, and 4,4'‐DDT) exceeding California hazardous waste criteria, as presented in Table 2.

No other analytical results (including for petroleum hydrocarbons, VOCs, and metals) exceeded hazardous waste criteria; therefore, soil excavated from below 1.5 feet bgs should be classified as non‐hazardous waste for off‐Site disposal purposes. Stockpiling and testing of shallow soil excavated on the Site may be performed prior to off‐Site disposal or on‐Site re‐use to re‐ evaluate the chemical quality and waste classification of the soil. The construction contractor should prepare a Soil Management Plan (SMP) which should outline how they will segregate, manage, test, re‐use, and dispose of soil generated from excavation and grading activities on the Site. The SMP should indicate that if soil exhibiting signs of potential contamination (e.g., staining or odors) is encountered during construction, the potentially contaminated soil would be segregated and characterized for waste disposal.

Sincerely,
William Scott, PG, CHg Cem Atabek
Senior Field Geologist Senior Environmental Engineer
3 Non‐RCRA hazardous waste refers to hazardous waste as defined under California law (CCR Title 22) which is not defined as hazardous waste under the Federal Resource Conservation and Recovery Act (RCRA).

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FIGURE

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24201-01 Figure 1 01/23/25
Figure 1
Boring Locations
Proposed East County Service Center, Brentwood, California B-18
B-17
B-16
B-15
B-14
B-13
B-12
B-11
B-10
B-9
Brentwood Boulevard
Technology Way
Business Court Drive
N
0 200 Feet
Legend
Boring Location A Site Boundary
0 CJ

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TABLES

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Table 1: Analytical Results for Metals
East County Service Center Southern PropertyBrentwood, CA Sample ID Boring Location
Sample Depths
(ft bgs)
Sample
Collection
Date
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
WET Chromium
(mg/L)
Cobalt
Copper
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
B‐9:0.0‐0.5 B‐9 0.0‐0.5 1/8/25 ‐‐ 8.0 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐10:0.0‐0.5 B‐10 0.0‐0.5 1/8/25 ‐‐ 8.3 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐11:0.0‐0.5 B‐11 0.0‐0.5 1/8/25 ‐‐ 8.8 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐12:0.0‐0.5 B‐12 0.0‐0.5 1/8/25 ‐‐ 8.5 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐13:0.0‐0.5 B‐13 0.0‐0.5 1/8/25 ‐‐ 9.0 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐14:0.0‐0.5 B‐14 0.0‐0.5 1/8/25 ‐‐ 8.2 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐15:0.0‐0.5 B‐15 0.0‐0.5 1/8/25 ‐‐ 9.0 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐16:0.0‐0.5 B‐16 0.0‐0.5 1/8/25 ‐‐ 8.5 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ B‐17:0.0‐0.5 B‐17 0.0‐0.5 1/8/25 ‐‐ 8.0 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐B‐18:0.0‐0.5 B‐18 0.0‐0.5 1/8/25 ‐‐ 8.4 ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐COMP‐5B‐9 through B‐12 0.0‐0.5 1/8/25 <2.9 8.5 260 0.54 <0.48 57 <0.30 16 46 11 <0.16 <0.95 63 <2.9 <0.48 <2.9 76 76 COMP‐6B‐9 through B‐12 1.5‐2.0 1/8/25 <2.9 8.0 240 0.65 <0.48 63 <0.30 16 45 9.4 <0.16 <0.96 70 <2.9 <0.48 <2.9 83 76 COMP‐7B‐13 through B‐15 0.0‐0.5 1/8/25 <2.9 7.9 240 0.51 <0.48 55 <0.30 15 43 11 <0.15 <0.95 59 <2.9 <0.48 <2.9 74 72 COMP‐8B‐13 through B‐15 1.5‐2.0 1/8/25 <3.0 7.8 240 0.51 <0.50 57 <0.30 16 43 8.6 <0.16 <0.99 63 <3.0 <0.50 <3.0 75 68 COMP‐9B‐16 through B‐18 0.0‐0.5 1/8/25 <2.9 8.3 250 0.52 <0.49 57 <0.30 16 45 11 <0.17 <0.98 62 <2.9 <0.49 <2.9 77 75 COMP‐10 B‐16 through B‐18 1.5‐2.0 1/8/25 <2.9 8.1 270 0.55 <0.49 61 <0.30 17 46 9.3 0.22 <0.98 70 <2.9 <0.49 <2.9 77 73 Construction Worker Direct Exposure 50 0.98 3,000 27 51 530000 5 NA 28 14,000 160 44 1,800 86 1,700 1,800 3.5 470 110,000 Commercial/Industrial Direct Exposure 160 0.31 220,000 230 1,100 1,800,000 5 NA 350 47,000 320 190 5,800 11,000 5,800 5,800 12 5,800 350,000

0.60 11 4 509 1.3 0.36 122 NA 15 29 24 0.26 1.3 57 0.058 0.80 0.56 112 149 500 500 10,000 75 100 2,500 NA 8,000 2,500 1,000 20 3,500 2,000 100 500 700 2,400 5,000 WET Testing Trigger Level (10 X STLC) 150 50 1,000 7.5 10 50 NA 800 250 50 2.0 3,500 200 10 50 70 240 2,500 15 5.0 100 0.75 1.0 5.0 5.0 80 25 5.0 0.20 350 20 1.0 5.0 7.0 24 250 TCLP Testing Trigger Level (20 X TCLP) NE 100 2,000 NE 20 100 NA NE NE 100 4.0 NE NE 20 100 NE NE NE NE 5.0 100 NE 1.0 5.0 NA NE NE 5.0 0.20 NE NE 1.0 5.0 NE NE NE Notes:Units are mg/kg unless indicated otherwise.

Metals analyzed by Environmental Protection Agency methods 6010B and 7471A for mercury. ‐‐ = not analyzed.

Shaded values indicates concentration equal to or exceeding trigger level for WET solubility analysis. ft bgs = feet below ground surface. <## = compound not identified at or above the laboratory reporting limit of ##. mg/kg = milligram per kilogram. mg/L = milligram per liter.
1 ESLs = Environmental Screening Levels, San Francisco Bay Regional Water Quality Control Board, January 2019. NE = not established.2 Background = Average Background Concentrations of Trace and Major Elements in California Soils, Kearney Foundation of Soil Science, March 1996. NA = not applicable.3 California and Federal Hazardous Waste [TTLC, STLC and TCLP]  ‐ California Code of Regulations Title 22. TTLC = Total Threshold Limit Concentration.4 Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Region, Dylan Duverge, December 2011. STLC = Solubility Threshold Limit Concentration.5 Indicates ESL for Chromium III as there are no screening levels established for total chromium. WET = soluble metals by Waste Extraction Test.

TCLP = Toxicity Characteristic Leaching Procedure.TTLC = Total Threshold Limit Concentration.

ESLs 1
Background 2
Hazardous
Waste
Criteria 3
TTLCSTLC (mg/L)TCLP Threshold (mg/L)
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Table 2: Analytical Results for Organochlorine Pesticides East County Service Center Southern Property
Brentwood, CA
Sample ID
Sample Depths
(ft bgs) Sample Date 4,4'‐DDD 4,4'‐DDE 4,4'‐DDT
Total DDD+
DDE+DDT Dieldrin
B‐9:0.0‐0.5 0.0‐0.5 1/8/25 11 780 210 1,001 <5.1
B‐9:1.5‐2.0 1.5‐2.0 1/8/25 <4.9 14 <4.9 14 <4.9
B‐10:0.0‐0.5 0.0‐0.5 1/8/25 15 990 250 1,255 <4.9
B‐10:1.5‐2.0 1.5‐2.0 1/8/25 <4.9 7.1 <4.9 7.1 <4.9
B‐11:0.0‐0.5 0.0‐0.5 1/8/25 17 1,100 310 1,427 12
B‐11:1.5‐2.0 1.5‐2.0 1/8/25 <5.0 21 5.9 26.9 <5.0
B‐12:0.0‐0.5 0.0‐0.5 1/8/25 16 780 230 1,026 7.0
B‐12:1.5‐2.0 1.5‐2.0 1/8/25 <5.0 9.7 <5.0 9.7 <5.0
B‐13:0.0‐0.5 0.0‐0.5 1/8/25 18 1,200 330 1,548 8.8
B‐13:1.5‐2.0 1.5‐2.0 1/8/25 <5.0 68 8.1 76.1 <5.0
B‐14:0.0‐0.5 0.0‐0.5 1/8/25 15 870 270 1,155 6.5
B‐14:1.5‐2.0 1.5‐2.0 1/8/25 <5.0 32 <5.0 32 <5.0
B‐15:0.0‐0.5 0.0‐0.5 1/8/25 22 1,100 400 1,522 8.7
B‐15:1.5‐2.0 1.5‐2.0 1/8/25 <5.0 20 <5.0 20 <5.0
B‐16:0.0‐0.5 0.0‐0.5 1/8/25 18 960 280 1,258 8.0
B‐16:1.5‐2.0 1.5‐2.0 1/8/25 <4.9 680 190 870 <4.9
B‐17:0.0‐0.5 0.0‐0.5 1/8/25 17 700 160 877 <4.9
B‐17:1.5‐2.0 1.5‐2.0 1/8/25 <5.0 <5.0 <5.0 <5.0 <5.0
B‐18:0.0‐0.5 0.0‐0.5 1/8/25 22 990 270 1,282 <5.0
B‐18:1.5‐2.0 1.5‐2.0 1/8/25 <5.0 43 7.3 50.3 <5.0
12,000 8,300 8,500 NA 160
81,000 57,000 57,000 NA 1,100
1,000 8,000
Notes:

Units are micrograms per kilogram.

Samples were analyzed for organochlorine pesticides by U.S. Environmental Protection Agency Method 8081A. <xx = indicates constituent was not identified at or above the laboratory reporting limit of xx Shaded values exceed California Hazardous Waste criteria.

NA = not applicable.
ft bgs = feet below ground surface.

TTLC = Total Threshold Limit Concentration.

Other organochlorine pesticides that are not shown were not detected above laboratory reporting limits. See lab report. 1 ESLs = Environmental Screening Levels, San Francisco Bay Regional Water Quality Control Board, January 2019. 2 The TTLC applys to the combined concentrations of DDD, DDE, and DDT.

ESLs 1 Commercial/Industrial Direct Exposure
Construction Worker Direct Exposure
California Hazardous Waste Criteria ‐ TTLC 1,000 2
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APPENDIX A
Laboratory Report

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Enthalpy Analytical
931 West Barkley Ave
Orange, CA 92868
(714) 771-6900
enthalpy.com
Lab Job Number : 523589
Report Level : II
Report Date : 01/22/2025
Analytical Report prepared for:

Cem Atabek
Baseline Environmental
388 17th St
Suite 230
Oakland, CA 94612
Project: 24201-01 - East County Service Center
Miguel Gamboa, Project Manager
[email protected]
This data package has been reviewed for technical correctness and completeness. Release of this data has been authorized by the Laboratory Manager or the Manager's designee, as verified by the above signature which applies to this PDF file as well as any associated electronic data deliverable files. The results contained in this report meet all requirements of NELAP and pertain only to those samples which were submitted for analysis. This report may be reproduced only in its entirety.

CA ELAP# 1338, NELAP# 4038, SCAQMD LAP# 18LA0518, LACSD ID# 10105, ORELAP# 4197
Authorized for release by:
1 of 98

A ALYTICAL

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