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Wrerminc.. SACRAMENTO <br /> t 4.0 GROUNDWATER INVESTIGATION <br /> ( Groundwater grab samples were collected from beneath the site by installing a <br /> temporary monitoring point into a completed core boring. This section describes the <br /> following: groundwater sampling procedures, laboratory analyses, and analytical results. <br /> f 4.1 Groundwater Sampling Procedures <br /> Groundwater samples were collected by carefully lowering a precleaned bailer by <br /> string line into a one-inch PVC-pipe with five feet of screen temporarily installed in thea- . <br /> open coring. The groundwater samples were prepared according to the following <br /> procedure: <br /> • The groundwater was transferred from the dedicated bailer into <br /> preserved, 40-milliliter volatile.organic.containers, and amber liter <br /> bottles; <br /> ( The sample was labelled with a sample identification numer, the date <br /> L. and time of collection,.and the.:sampler's'initials; <br /> • The sample was then listed on the Versar chain-of-custody;form;.and <br /> • The sample was stored on ice.in a cooler until it was submitted to a <br /> California state-certified-laboratory.. <br /> 4.2 Laboratory Analysis and Analytical Results of Groundwater Samples <br /> Four groundwater samples were submitted for laboratory analysis. Each'`sample was <br /> analyzed by Superior for TPH-G using EPA Method 8015, for TPH-D using EPA Method <br /> 8015, for BTEX using EPA Method 8020, and halogenated volatile organics by EPA. <br /> Method 8010. <br /> Laboratory analysis of rou er_sam collected from the site did not identi <br /> nT'PH-G, TPH-D, or BTEX in con n ations at or above the relevant methods' reporting <br /> ',howev two of the samples were found to contai traceslof halogenated volatile <br /> { <br /> 8 <br /> l <br />