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San Joaquin Courcy <br /> September 16, 1996 <br /> Page 3 <br /> RECONNAISSANCE GROUNDWATER SAWLING <br /> Groundwater from each exploratory Push point location(boring)will be sampled. The ground water <br /> samples collected Som the boreholes will be used for a raid of the site groundwater <br /> contamination. The boreholes and temporary wells will be sampled using the attached Sampling protocol. <br /> A brief summary of these procedures follows: Each borehole will be advanced into the aquifer and <br /> temporarily cased. The water entering the borehole will be sampled using a clean bailer,and carefully <br /> poured into the qViropriate labs+preserved and prepared container with minimum cavitation. <br /> Each water sample will be labeled,logged onto a chain-of-custody form,and placed in a chilled ice chest. <br /> Upon completion of the borehole sampling,the borehole will be sealed from bottom to top with grout. <br /> C1�KNUCAL ANALYSIS <br /> Up to ten sail and ten groundwater samples will be analyzed at a State certified analytical laboratory. <br /> Selected samples will be tested at a minimum for the following,(TPHG),(TTHD)and(BTEX),using <br /> EPA Methods 5030,3510/5015. These samples will be analysed at Friedman and Bruya Laboratories in <br /> Seattle,Washington so potential native hydrocarbons can be discriminated from presence of petroleum <br /> %d hydrocarbons. The analyses will be performed on a normal turnaround basis. <br /> REPORT <br /> A report of the results will be prepared with the chemical data,field logs,sampling methods as provided <br /> for in Contemporary guidance documents published by the PHS-E1lD and the State of California,Regional <br /> Water Quality Control Board. <br /> Please advise when Wright can schedule the site work identified in this workplan. <br /> Sincerely, <br /> Wright Envil Services,Inc. <br /> John Lynch <br /> Ptojoct Manager <br />