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CONESTOGA-ROVERS <br /> &ASSOCIATES <br /> July 14,2004 2 Ref. No. 000197-63 <br /> supervision of a California Registered Geologist. A copy of the fully executed Well Permit will <br /> be on-Site during implementation of the SOW. Additional field activities will be scheduled <br /> with EHD as required. <br /> 2.1 MONITORING WELL INSTALLATION <br /> One monitoring well will be installed to a depth of approximately 80 feet below the ground <br /> surface (bgs) at the PW2 cluster location and two monitoring wells will be installed <br /> (approximately 80 and 140 feet bgs at the PW10 cluster location (see Figure 1). The 2-inch <br /> diameter schedule 80 PVC wells will be installed utilizing 6-inch diameter sonic drilling <br /> technology. Specific details of the well installation procedures are presented in the attached <br /> Sections 01000 and 02522 (taken from the original subcontractor bid package). The monitoring <br /> well construction details are shown on Figure 2. <br /> 2.2 QUALITY ASSURANCE/QUALITY CONTROL <br /> During the advancement of the borings,a Quality Assurance/Quality Control (QA/QC) <br /> program will be employed. The QA/QC procedures include but are not limited to the <br /> following: <br /> • Cleaning of non-disposable drilling equipment prior to use at each boring location; <br /> • Decontamination of sampling equipment prior to sample collection in the event that <br /> samples are collected for laboratory analyses; <br /> • Proper calibration of field equipment; <br /> • Chain-of-Custody protocol for laboratory analysis (if samples collected) to ensure sample <br /> integrity;and <br /> • Documentation of field procedures <br /> 2.3 WASTE DISPOSITION <br /> CRA will ensure that soil cutting and water generated as a result of the Work Plan activities will <br /> be properly handled in accordance with regulatory standards. <br /> 2.4 SITE HEALTH AND SAFETY <br /> A Site-specific health and safety plan (HASP) will be prepared for the monitoring well <br /> replacement activities conducted at the Site. The HASP will be developed in order to minimize <br /> hazards and exposures to workers involved in the activities. <br /> Worldwide Engineering,Environmental,Construction,and IT Services <br />