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DER <br /> ATTACHMENT <br /> \\ BrIgM People.fllg[Solutioni. <br /> V <br /> ATTACHMENT A <br /> WORK PLAN <br /> PIEZOMETER DESTRUCTION <br /> DELTA WATER SUPPLY PIPELINE PROJECT <br /> H&H MARINA <br /> EMPIRE TRACT, CALIFORNIA <br /> File No. 113408.Task 3 <br /> September 21, 2010 <br /> INTRODUCTION <br /> The following work plan is for the destruction of six piezometers as part of the Delta <br /> Water Supply Pipeline project, near the H&H Marina, Empire Tract, California. If a portion <br /> of this work plan does not meet the requirements of San Joaquin County Environmental <br /> Health Department (EHD), or if those needs have changed, Kleinfelder will consider <br /> appropriate modifications, subject to the standards of care or EHD Well Standards to <br /> which we adhere as professionals. <br /> BACKGROUND <br /> Groundwater elevations have been recently monitored as part of dewatering and <br /> recharge trench operations, with existing piezometers previously permitted and installed <br /> as part of the Delta Water Supply Pipeline Project. The piezometers were installed due <br /> to a nearby groundwater contaminant plume area at the H&H Marina at the west end of <br /> 8-Mile Road. Dewatering operation are planned to cease in the near future and CDM <br /> has a scheduled timeline to abandon said piezometers soon after dewatering stops. <br /> Six piezometers have been installed, three into a shallow groundwater zone <br /> (approximately 15 feet depth) and three into a deeper groundwater zone (approximately <br /> 60 foot depth). This work plan details activities and the proposed abandonment <br /> methodology that the Regional Water Quality Control Board (RWQCB) has previously <br /> read and approved. Mr. Tim O'Brien is the contact person at the RWQCB. <br /> The following scope of work is generally based on typical EHD well <br /> 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 /> 113408.Task 3/ST010P152 Page 1 of 3 September 21, 2010 <br /> Copyright 2010 Kleinfelder <br />