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LK E/NFELOER <br /> �➢^'➢M1t✓eWle.Rl➢hlbMkn,. <br /> ATTACHMENT A <br /> SCOPE OF WORK <br /> PIEZOMETER INSTALLATION <br /> DELTA WATER SUPPLY PIPELINE PROJECT <br /> H & H MARINA <br /> EMPIRE TRACT, CALIFORNIA <br /> File No. 87057.E01 <br /> June11, 2010 <br /> INTRODUCTION <br /> Kleinfelder is pleased to present this work plan for the installation of 6 piezometers as part <br /> of the Delta Water Supply Pipeline project, near the H & H Marina, Empire Tract, <br /> California. If a portion of this work plan does not meet the needs of CDM or the San <br /> Joaquin County Environmental Health Department (EHD), or if those needs have <br /> changed, Kleinfelder will consider appropriate modifications, subject to the standards of <br /> care to which we adhere as professionals. <br /> BACKGROUND <br /> Kleinfelder understands dewatering operations will be conducted as part of this project <br /> in proximity to a known petroleum groundwater contaminant plume at the H&H Marina. <br /> CDM has proposed mitigating potential migration of a contaminant plume during <br /> dewatering. The proposed piezometers will be installed into a shallow and deeper <br /> groundwater zone to enable monitoring of groundwater elevations and the effectiveness <br /> of the mitigation efforts. <br /> CDM has provided specifications for the installation of the six proposed piezometers. <br /> The following scope of work is generally based on those specifications and typical EHD <br /> well standards/requirements. <br /> PROPOSED SERVICES <br /> Task 1 — Pre-Field Activities <br /> As part of the permitting process, Kleinfelder will submit this work plan, a health and <br /> safety plan and completed permit application and fees to EHD. Kleinfelder will arrange <br /> and schedule drilling subcontractors to perform the piezometer installation and <br /> abandonment activities. The work area will be marked in white paint and Underground <br /> Service Alert (USA)will be notified at least 48 hours prior to conducting field activities. <br /> 87057.EMST0101-063 Page 1 of 4 June 11, 2010 <br /> Copyright 2010 Kleinfelder <br />