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ARCHIVED REPORTS_XR0005748
EnvironmentalHealth
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EHD Program Facility Records by Street Name
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N
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99 (STATE ROUTE 99)
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6100
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2900 - Site Mitigation Program
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PR0515353
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ARCHIVED REPORTS_XR0005748
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Last modified
11/19/2024 1:50:33 PM
Creation date
4/1/2020 2:47:19 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0005748
RECORD_ID
PR0515353
PE
2950
FACILITY_ID
FA0012099
FACILITY_NAME
ARCO STATION #595
STREET_NUMBER
6100
Direction
N
STREET_NAME
STATE ROUTE 99
City
STOCKTON
Zip
95209
CURRENT_STATUS
01
SITE_LOCATION
6100 N HWY 99
P_LOCATION
99
P_DISTRICT
004
QC Status
Approved
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SJGOV\sballwahn
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EHD - Public
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• Date October 27,2000 <br /> Quarter 3Q00 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 595 Address 6100 North Highway 99, Stockton,CA <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person SECOR International Incorporated/Rusty Benkosky <br /> Consultant Project No 077 42007 703 <br /> Primary Agency/Regulatory ID No San Joaquin County Environmental Health Services <br /> Assembly Bill 681 Status Property is owned by Atlantic Richfield Company (ARCO) <br /> WORK PERFORMED THIS QUARTER (Third Quarter—2000)- <br /> 1 Conducted groundwater monitoring and sampling <br /> 2 Prepared and submitted quarterly groundwater monitoring report <br /> 3 Prepared and submitted Initial Site Assessment Report (SECOR,October 2,2000) <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth Quarter—2000): <br /> 1 Conduct quarterly groundwater monitoring and sampling(including onsite water supply well) <br />. 2 Prepare and submit quarterly groundwater monitoring report <br /> QUARTERLY RESULTS SUMMARY <br /> Current Phase of Project Monitoring <br /> Frequency of Groundwater SamplingWells MW-1,MW-2,MW-3,and MW-4 sampled quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Is Free Product(FP)Present On-Site No <br /> FP Recovered this Quarter NA <br /> Cumulative FP Recovered to Date NA <br /> Current Remediation Techniques Natural Attenuation <br /> Approximate Depth to Groundwater 58 5 to 60 5 ft <br /> Groundwater Gradient West-northwest @ 0 003 ft/ft <br /> DISCUSSION: <br /> TPHg was reported in all four wells sampled this quarter at concentrations ranging from 217 ppb(MW-3)to 18,900 <br /> ppb(MW-4) Benzene was reported in all four wells sampled this quarter at concentrations ranging from 0 582 ppb <br /> (MW-3)to 2,240 ppb(MW-4) MtBE(by EPA Method 8260) was detected in three of the four wells sampled at <br /> concentrations of 2 42 ppb(MW-1),93 6 ppb(MW-2),and 2,510 ppb(MW-4),respectively Tert-butyl alcohol <br /> (TBA) was reported in one well at a concentration of 637 ppb(MW-4) 1,2-Dichloroethane(1,2-DCE) was <br /> reported in three of the four wells sampled at a maximum concentration of 229 ppb(MW-4) Groundwater flow <br /> direction was to the west-northwest at 0 003 ft/ft <br />
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