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Cil l <br /> 1992 First Quarter Groundwater Monitoring Report AWE% <br /> Chase Chevrolet,Stockton,CA <br /> Apnl 16, 1992 <br /> W0155 <br /> Laboratory Analysis <br /> Groundwater samples were analyzed for benzene, toluene, ethylbenzene, xylenes (BTEX), and <br /> total petroleum hydrocarbons as gasoline (TPHG), by EPA methods 8020 and modified 8015, <br /> respectively Laboratory analysis indicate elevated concentrations of petroleum hydrocarbons <br /> in the samples collected from MW-1, MW-2, MW-4, MW-b, and MW-7 The sample collected <br /> from well MW-5 contained nondetectable concentrations (not detected at or above method <br /> detection limits) of the analytes The analytical results are summarized In Table 2, the <br /> laboratory reports and chain-of-custody documentation are presented in Attachment 3 <br /> RESNA will continue the quarterly monitoring program at this site, the next sampling event will <br /> be performed in May 1992 If you have any questions regarding this project, please contact Bill <br /> Channell at our Escalon office (209) 838-3507 <br /> Respectfully, <br /> RESNA Industries <br /> AW714-0- V� <br /> Sharon A Young <br /> Microbiologist <br /> le <br /> Gregory P Stahl <br /> CA Registered Geologist No 5023 <br /> ATTACHMENTS Figure 1 Site Location Map <br /> Figure 2 Groundwater Gradient Map (02127192) <br /> Table 1 Summary of Groundwater Monitoring <br /> Table 2 Summary of Laboratory Analysis <br /> Attachment 1 QA/QC Plan <br /> Attachment 2 Well Purge Logs <br /> Attachment 3 Lab Data Sheets and Chain of Custody <br /> PC Mr Gerald Sperry, Freeman, Brown & Sperry <br /> Mr Kim Smith, Kroloff, Belcher, Smart, Perry, and Christopherson <br /> QR032692 SAY 2 <br />