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�5 INTERNATIONAL TECHNOLOGY CORPORATION <br /> calculated. Sampling procedures conformed to California Regional Water Quality Control <br /> Board and San Joaquin County Environmental Health guidelines At least three well volumes <br /> of water were purged prior to the collection of samples Measurements of pH, temperature, <br /> and conductivity were collected to verify that the wells had stabilized prior to sampling. <br /> Purging and sampling data is contained in Appendix B <br /> After purging, each well was sampled with a new Voss Technologies disposable bailer <br /> Groundwater was transferred directly from the bailer to appropriately preserved bottles <br /> supplied by the laboratory A distilled water field blank was collected All sample bottles <br /> were then placed into "zip-loc" bags, sealed with security tape, and placed in a refrigerated <br /> ice chest Chain of custody forms accompanied the samples at all times (Appendix C). <br /> IT Field Analytical Services State License No 1564) in <br /> The samples were analyzed at y ( <br /> Martinez, California. Samples were analyzed for TPH as gasoline and diesel (EPA method <br /> 8015), and BTEX (EPA method 8020) Coliform bacteria analyses required by the San <br /> Joaquin County well installation special permit were performed by FGL Environmental <br /> Analytical Chemists (State License No 48786) in Stockton, California <br /> 4.0 Summary of Findings <br /> Survey and monitoring data indicated that groundwater flows to the northeast with a gradient <br /> of 0 0011 ft/ft (Figure 3) The water table was encountered at approximately 42 feet below <br /> grade Tables 1 through 4 contain groundwater elevation data <br /> No detectable amounts of petroleum hydrocarbons or volatile organics were measured in any <br /> of the groundwater samples collected during the March sampling event. Laboratory results <br /> are summarized in Tables 1 through 4 Copies of the original laboratory reports are <br /> presented in Appendix D <br /> 5.0 Signatures <br /> The interpretations and conclusions contained in this report represent our professional <br /> opinions, These opinions are based on currently accepted engineering practices at this time <br /> and for this specific site No additional warranty is implied or intended <br /> 2 <br />