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Samples were collected, preserved, and transported under chain-of-custody in accordance with <br /> RESNA's Quality Assurance/Quality Control (QA/QC)Plan, soil sampling protocol(on file with <br /> the SJCPHS) The selected samples were analyzed for benzene, toluene, ethylbenzene, xylenes <br /> (BTEX) and total petroleum hydrocarbons as gasoline (TPHG) by EPA methods 8020 and <br /> modified 8015, respectively The method detection limit at RESNA Environmental for BTEX <br /> ' and TPHG in soil is 0 005 and 1 0 parts per million, respectively Analytical results are <br /> summarized in Table 2 Laboratory data sheets are included in Appendix III <br /> Soil cuttings generated as a result of drilling have been placed on and covered with 6 mil plastic <br /> sheeting and stockpiled on-site Soil cuttings and groundwater will be properly disposed of after <br /> reviewing the analytical results and obtaining agency approval <br /> 3.2 Monitoring Well Construction <br /> Following completion of the 3 borings, each was converted to a groundwater monitoring well <br /> by advancing the boring approximately 15 feet below static water level for well installation The <br /> wells were constructed of two inch diameter F480 threaded PVC screen/casing No glues or <br /> solvents were used Screen slot size was 0 010 inch Sand pack material consisted of #2/12, <br /> pre-washed silica-sand. A two-foot bentonite seal was placed over the sand pack prior to <br /> grouting with neat-cement grout Wells were installed to a depth of approximately 30 feet below <br /> grade Well completion depth was based on the setting of the well screen approximately 15 feet <br /> below and 5 feet above the saturated zone This construction will allow for seasonal <br /> groundwater fluctuations Completion depths were determined in the field based on <br /> hydrogeologic conditions encountered and are exhibited on the boring/well logs (Appendix II) <br /> Following installation, each monitoring well was developed in accordance with RESNA's <br /> QA/QC Plan, groundwater development protocol (on file with the PHS/EHD) The wells were <br /> developed until they were relatively sediment free All water produced during well development <br /> Lwas contained in DOT 17H drums and stored on-site pending determination of method for proper <br /> disposal <br /> R-61292 TL 4 <br />