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MAR 23 '93 09:50 HLTON G;r'_'S C I EP ICE 5.106828921 , "� P.4 <br /> �1 <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 GROUNDWATER SAMPLING,AND 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 is gasoline (TPH-G) and diesel (TPH-D); and <br /> i� <br /> • benzene, toluene, ethylbenzene, and total xylenes (ETEX). <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 /> �f <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 will be removed from the site and transported by a <br /> licensed waste hauler for proper disp6sal and/or recycling. 'Waste manifests will be prepared � 4 <br /> for proper transport and disposal. <br /> l <br /> 3.7 AQUIFER TESTING <br /> I <br /> A step discharge and 48-hour constant'discharge pumping test will be performed on Monitoring <br /> Well AW-9, and the new wells will besused 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 i <br /> extended aquifer test. <br /> tl <br /> 4.0 REPORTING <br /> 'i <br /> 4.1 RISK ASSESSMENT REPORT ' <br /> A risk assessment report will include a summary of the site background review and history, <br /> 4 information collected from the installation of new wells, aquifer testing, and the health risk <br /> assessment methodology and results. J <br /> 3 <br /> d i <br />