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1 0 FIELD PROCEDUR <br /> 1.1 Ground Water Depth Determination <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 Ptreing <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 well development All developed water was placed in drums on site for later <br /> disposal <br /> 1.3 Ground Water Sampling <br /> After water levels have been allowed to recover to static or near static conditions in the well, a liquid <br /> sample was 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 /> labeled and stored on ice from the time of collection through the time of delivery to the laboratory <br /> Ground water samples werd transported to the laboratory and analyzed within the U S Environmental <br /> Protection Agency (EPA)-specified holding time for the requested analyses. <br /> 2.0 ANALYTICAL PROCEDURES <br /> Ground water samples were submitted to a California-certified laboratory and analyzed for benzene, <br /> toluene, ethylbenzene, and xylenes (BTEX), and total petroleum hydrocarbons (TPH) 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 procedures 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 than the maximum allowable holding time <br /> 3.2 Sample Identification and Chain-of-Custody Procedures <br /> LRP027 TA <br />