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23 June 1998 <br /> AGE-NC Project No. 98-0445 <br /> Page 2 of 5 <br /> be modified by changing recharge and discharge patterns. <br /> The historical depth to ground water at the properties based on the San Joaquin County FCD&WCD <br /> map titled Lines of Equal Depth to Groundirater 1975 was reported to be approximately 25 feet bsg. <br /> 3.0. SCOPE OF WORK <br /> 3.1. DRILLING AND SAMPLING <br /> The analytical results from the UST removal indicte that additional soil and ground water may be <br /> impacted by petroleum hydrocarbons. Therefore, the PHS-EHD has request the lateral and vertical <br /> definition of both the hydrocarbon-impacted soil and possible ground water. <br /> The proposed scope of work presented in this work plan includes the installation of three soil <br /> borings, the completion of one boring as a t,tvo-inch diameter ground water monitoring well and the <br /> collection of a ground water sample. The proposed soil boring locations are illustrated in Figure 2. <br /> The typical well design specifications are illustrated in Figure 3 - 11onitoring Well Design. <br /> Each boring will be advanced utilizing a truck mounted, drill rig and 8.25-inch hollow-stem augers. <br /> Soil samples will be collected at five-foot inten-als beginning at 5 feet bsg in each borincy. Samples <br /> will be collected using a California split-spoon sampler and brass sleeves. Samples will be driven <br /> by dropping a 140-pound weight from a height of 30 inches. The number of blows required to drive <br /> each 6-inch Iength of the sampler (blow counts) will be recorded on boring logs by an .AGE staff <br /> geologist. <br /> Upon sample retrieval, the middle brass sleeve will be removed from the sampler. The ends of the <br /> sleeve will be immediately covered with Teflon or aluminum sheets, sealed with plastic end caps, <br /> secured with tape and immediately placed under ice in a chilled container for transportation to a <br /> state-certified laboratory. Each soil sample sleeve will be labeled with the following: boring <br /> location, vertical depth, time, date and sampler's initials. <br /> 3.2. EQUIPMENT DECONTAMINATION <br /> All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean <br /> water after washing with a solution of Alconox. All auger stems will be steam cleaned prior to <br /> advancement in each boring. <br />