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w <br /> .a: a <br /> LO FIELD PRQCLcDURES <br /> Ground Water Dept Det[rminaflQ9 <br /> A water level indicator was used to determine the depth to water from the top of the monitoring well <br /> casing. The tip of the probe was subjectively analyzed for product sheen or detectable odor. <br /> 1.2 Monitoring Well PureW <br /> Each monitoring well was purged by bailing three to five well volumes. If the well was pumped dry <br /> during the purging process,recharge rates were recorded. No water or chemicals were introduced into <br /> the monitoring wells during wMl development. All developed water was placee in drums on site for later <br /> disposal. <br /> 11,3 Ground Wattt Sampim <br /> After water levels have been allowed to recover to static or near static conditions in the well, a liquid <br /> sample wzs collected from each well with a clean disposable plastic bailer,then stored in two 40-milliliter <br /> vials which contained a preservative to prevent biological degradation. Each sample was appropriately <br /> iab:led and stored on ice from the time of collection through the time of delivery to the labotstory. <br /> Ground wooer samples werd transported to the laboratory and analyzed within the UX. Environmental <br /> Protection Agency g9 y(EPA)-specified haIding time for the requested analyses. <br /> 2.0 ANALYTICAL PROCEDURES <br /> Ground water samnles were submitted to a California-certified laboratory and analyzed for benzene, <br /> toluene, ethylbenzene, and fyienes(BTE}), and total petroleum hydrocarbons LITH}as gasoline using <br /> EPA and California Department of Health Services approved methods. <br /> 3.0 QUALITY ASSURANCE PLAN <br /> This item describes the field and analytical pr-::edures followed throughout the sampling event. <br /> 3.1 General Sample Collection and Handling Procedures <br /> Proper collection and handling are essential to ensure the quality of a sample. Each sample was collected <br /> in a suitable container, preserved correctly for the intended analysis, and stored prior to analysis of no <br /> longer ban the maximum allowable hoIding time. <br /> .2 Sample Identification and Chain-of-Custod Procedures <br /> LRPo27.TA <br />