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v <br /> oologhat'r"mW i= Page 5 <br /> Additional Site Characterization Work Plan <br /> Project No.724.2 <br /> June 27,2002 <br /> LBailer blanks for each sample, along with a field blank (prepared from water provided by <br /> the laboratory poured into a VOA vial on site)will accompany the samples to the laboratory <br /> Land serve as checks against cross contamination. <br /> L A chain of custody document, listing all samples collected, accompanies the samples from <br /> field to laboratory, thereby providing a means to track their movement and ensure their <br /> integrity. <br /> All water purged from each monitoring well and not used as a sample,will be placed in a 55 <br /> gallon DOT approved container, properly labeled and stored on site until its proper <br /> Ldisposition can be arranged. <br /> 2.2.2 Groundwater Sample Analyses <br /> L Groundwater samples from the new and existing wells will be submitted to Sherwood Labs <br /> of Hilmar, California (Department of Health Services Certification No. 1400) for the <br /> following analyses: <br /> L • Benzene, toluene, ethlbenzene and xylene BTEX , & MTBE b EPA method <br /> Y Y ( ) Y <br /> L5030/8020. <br /> • Gasoline range petroleum hydrocarbons(TPH-G)by EPA method 5030/8020 <br /> L The detection limits for these compounds are listed below. A Chain of Custody will be <br /> completed for all samples collected and tracked to ensure sample integrity. <br /> L Detection Limits: BTEX MTBE TPH-G <br /> Water(gg/L) 0.3 2 50 <br /> L3.0 SCHEDULE& REPORTING <br /> LGeological Technics Inc. anticipates beginning field work no later than 30 days after work <br /> plan approval and upon issuance of the drilling permit. The information gathered during <br /> this phase of work will be presented in a report that will include a summary of the geology. <br /> Dr. Ray Kablanow, a registered professional geologist, will supervise the project. Copies of <br /> the report will be forwarded to both the appropriate County and State regulatory agencies <br /> L (SJCEHD and CRWQCB-CVR). Groundwater monitoring will occur on a quarterly basis. <br /> A report will be issued for each monitoring event and submitted to the County and State <br /> agencies. <br /> L <br /> L <br />