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r <br /> /RES.V� <br /> Working To Restore Nature <br /> aWORKPLAN <br /> Task 1 - Permitting and Scheduling <br /> This task includes obtaining the necessary permits for drilling and well installation from San <br /> Joaquin County Environmental Health Department, scheduling field personnel and equipment, <br /> locating underground utilities, and performing any other necessary field preparation and job I <br /> start-up activities. j( <br /> Task 2 - Installation of One Groundwater Monitoring Well <br /> One soil boring will be drilled in a location assumed to be downgradient from the former <br /> r, underground storage Tanks (Plate 2). The boring will be advanced to a depth of approximately d <br /> t� 41 feet using 10-inch O.D. hollow stem augers. Drilling will be conducted by a State-licensed <br /> (CSn drilling company. A field geologist will be present to log all drill cuttings and soil <br /> samples. Descriptions of soil types encountered, sample collection intervals, and well <br /> Fes, construction details will be recorded on boring/well logs and included in the PAR. Soil samples <br /> will be collected at five foot intervals and selected samples will be submitted for laboratory <br /> py analysis of TPHg and BTEX. <br /> All drill cuttings will be placed on and covered with plastic and stored on-site pending laboratory <br /> f <br /> results. Selected soil samples will be sent using chain-of-custody record to a State-certified <br /> laboratory for analysis of TPHg and BTEX by EPA methods 8015/8020, respectively. The <br /> boring will be completed as a groundwater monitoring well. The monitoring well will be ' <br /> ( 1 constructed of 4-inch inside diameter PVC well screen and casing. A 0.010-inch well screen ` <br /> slot and 4/2/12 mesh sand pack will be used. Neat cement will be used to seal the well in t <br /> (} accordance with California Well Standards (December 1981). To protect the integrity of the 1 <br /> L well, a locking, water-tight well plug will be installed on the well and a water-tight, locking <br /> wellhead labeled "monitoring well" will be concreted over well. Typical well construction <br /> n details are shown on 'Plate 4. <br /> 150078\REP0RT3\WP-0894.FNL 4 <br /> �1 <br />