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r <br /> regarding the depth to ground water and presence of free product, if any. Field procedures are <br /> described in Appendix A. <br /> 3.5 GROUND WATER SAMPLINGAND ANALYSIS <br /> Ground water samples will be collected from both newly installed and existing observation wells <br /> which do not contain free product, in accordance with EPA protocol (Appendix A). <br /> Ground water samples will be analyzed for the following: <br /> • total petroleum hydrocarbons as gasoline (TPH-G) and diesel ('TPH-D); and <br /> • benzene, toluene, ethylbenzene, and total xylenes (BTEX). <br /> All laboratory analyses will be performed by a state-certified laboratory. Chain of Custody <br /> protocol will be followed for all samples selected for analysis, thus'providing a continuous <br /> record of sample possession prior to actual analysis. <br /> 3.6 SOIL AND GROUND WATER DISPOSAL <br /> Soil generated during drilling activities will be stored onsite on plastic.sheeting; purged ground <br /> water will be stored onsite in DOT drums pending laboratory analysis. Based on the results of <br /> laboratory analysis, soil and ground water willbe removed from the site and transported by a <br /> licensed waste hauler for proper disposal and/or recycling. Waste manifests will be prepared <br /> for proper transport and disposal. <br /> 3.7 AQUIFER TESTING <br /> A step discharge and 48-hour constanvdischarge pumping test will be performed on Monitoring <br /> Well AW-9, and the new wells will be used for observation. The aquifer tests will estimate well <br /> efficiency, hydraulic conductivity, storativity, transmissivity, and potential heterogeneities in the <br /> aquifer. Note that well efficiency tests will be used to develop optimum pumping rates for the <br /> extended aquifer test. <br /> 4.0 REPORTING <br /> 4.1 RISK ASSESSMENT REPORT <br /> A risk assessment report will include-a summary of the site background review and history, <br /> information collected from the installation of new wells, aquifer testing, and the health risk <br /> assessment methodology and results. <br /> 3 <br />