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' M KLEINFEL1) ER <br />' Water level measurements will be made in the wells at the beginning of the sampling round <br /> prior to purging and sampling the wells The depth to groundwater will then be measured <br /> in each well according to the protocol described in Attachment A The depth to <br /> groundwater measurements will then be converted to relative groundwater elevations with <br /> respect to mean sea level or a local benchmark by subtracting them from the surveyed <br /> casing elevations <br />' The resulting groundwater elevations will be used to assess the direction of the groundwater <br /> gradient at the time of sampling This information can then be used to assess which wells <br />' represent upgradient and which wells represent downgradient groundwater conditions <br /> Approximately 24 hours after the new well is developed, three to five well volumes will be <br /> purged, and samples will be collected from the wells, as described in Attachment A The <br /> three groundwater samples will be submitted to a State certified laboratory for the following <br /> analyses <br /> • TPH Purgeable by EPA Method 8015M/5030 (gasoline range) <br />' • BTEX by EPA Method 8020/602 <br />' • Total Lead by EPA Methods (ICRP/AA) <br /> The samples will be submitted for analyses on a normal laboratory schedule requiring <br /> Mapproximately two weeks (10 working days) for completion <br />' ASSUMPTIONS AND CLIENT RESPONSIBILIDES <br /> • This proposal will be adequate to obtain authorization from the SJCEHD If a <br />' more comprehensive workplan is necessary, additional charge for workplan <br /> preparation will be incurred <br /> rp Adequate work space and access will be provided Klemfelder will attempt to <br /> advance the soil boring at the proposed locations If the drilling equipment <br /> cannot be positioned, alternative drilling locations or sampling methods should <br />' be investigated The borings are to be drilled with a truck mounted drill ng <br /> equipped with hollow stem augers If alternative dnllmg methods or concrete <br /> cutting are required, additional costs may be incurred <br /> • No respiratory protection or shoring will be necessary <br /> DH and 7EI94 Page 4 of 6 <br /> Copyright 1994 Klernfelder, Inc <br /> L <br />