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ARCHIVED REPORTS_XR0009725
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3500 - Local Oversight Program
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PR0545680
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ARCHIVED REPORTS_XR0009725
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Last modified
5/20/2020 2:52:24 PM
Creation date
5/20/2020 2:30:21 PM
Metadata
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Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0009725
RECORD_ID
PR0545680
PE
3528
FACILITY_ID
FA0005535
FACILITY_NAME
THIEMANS SERVICE
STREET_NUMBER
106
STREET_NAME
SECOND
STREET_TYPE
ST
City
RIPON
Zip
95366
CURRENT_STATUS
02
SITE_LOCATION
106 SECOND ST
P_LOCATION
05
P_DISTRICT
005
QC Status
Approved
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EHD - Public
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1 <br /> �"j� <br /> tWorking To Restore Nature <br /> SAMPLING ACTIVITIES <br /> On September 15, 1994, groundwater samples were collected by RESNA from three shallow <br /> ' monitoring wells (MW-1, MW-2 and MW-3) The locations of the monitoring wells are <br /> shown on Plate 2. <br /> ' Prior to collection of groundwater samples, the depth to water, pH, electrical conductivity, <br /> and temperature were measured in the monitoring wells and recorded. A minimum of three <br /> ' well casing volumes were purged from each well prior to sampling. The wells were allowed <br /> to recover and samples were collected from each well using dedicated disposable bailers <br /> The groundwater samples collected from each well were submitted to Argon Mobile <br /> ' Laboratories (FLAP cert no 1873) for analysis of total petroleum hydrocarbons as gasoline <br /> ('TPHg) and benzene, toluene, ethylbenzene, and xylenes (BTEX) utilizing EPA methods <br /> ' 50301801518020. <br /> Groundwater well purge and sample logs are provided in Appendix A <br /> ANALYTICAL RESULTS <br /> ' All petroleum hydrocarbon analytes for the sample collected from well MW-1 were reported <br /> below laboratory method detection limits The sample collected from well MW-2 contained <br /> ' concentrations of TPHg (700 ug/1), benzene (1.0 ug/1), toluene (6 3 ug/1), ethylbenzene (3 5 <br /> ug/1), and xylenes (46 ug/1). The sample collected from well MW-3 contained concentrations <br /> of TPHg (170,000 ug/i), benzene (180 ug/1), toluene (7,500 ug/1), ethylbenzene (2,200 ug/1), <br /> ' and xylenes (13,000 ug/1). A summary of analytical results is presented in Table 1. <br /> Laboratory data sheets and chain-of-custody documentation are provided in Appendix B <br /> GROUNDWATER FLOW DIRECTION <br /> ' Water level measurements were collected from wells MW-1, MW-2 and MW-3 on September <br /> 15, 1994. Water levels ranged from 29.38 to 29 73 feet below the tops of the well casing <br /> elevations, representing an average decrease in the water table elevation of approximately 1 30 <br /> feet since June 1994. The water level data were used to develop the groundwater elevation <br /> ' contour map (Plate 3). Assuming that horizontal isotropic conditions prevail, groundwater in <br /> the uppermost aquifer beneath the site flowed in a southeast direction. The hydraulic gradient <br /> z <br /> ' 150078IQUARTLY\2QR-1994 FNL <br />
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