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A cLa <br /> garpn <br /> 'OAR u ? 1995 <br /> ENVIRONMENTAL HEALTH <br /> ENVIRONMENTAL ENGINEERING CORPORATION PERMIT/SERVICES <br /> March 6, 1995 <br /> Ms. Margaret Lagorio, R.E.H.S. <br /> Lead Senior Registered Environmental Health Specialist <br /> San Joaquin County, Public Health Services <br /> 445 N. San Joaquin Street <br /> Stockton, California 95201 <br /> Dear Ms. Lagorio: <br /> WORKPLAN TO ABANDON MONITORING WELLS AT NEW HOLLAND SITE <br /> LOCATED AT 2150 W. CHARTER WAY, STOCKTON, CALIFORNIA <br /> McLaren/Hart has prepared this workplan to abandon five monitoring wells at the above <br /> referenced site. This well abandonment workplan has been prepared in response to an April <br /> 11, 1994 letter from San Joaquin County Public Health Service (SJCPHS) requesting that <br /> the monitoring wells be destroyed. Upon completion of this task, final site closure from <br /> SJCPHS may be obtained for the facility. The proposed scope of work for well <br /> abandonment is presented below. A well destruction permit and $60 permit fee is included <br /> with this workplan. <br /> Scope of Work <br /> Five monitoring wells (MW-1 through MW-5) will be abandoned at the New Holland site. <br /> The wells are constructed with 2-inch diameter Schedule 40 PVC casing within an 8-inch <br /> diameter borehole. A copy of the detailed well logs can be found in Attachment A. <br /> McLaren/Hart proposes to abandon the monitoring wells at the New Holland site by drilling <br /> out the well boreholes. Prior to abandoning the wells, the steel vault boxes for the wells <br /> will be removed. The wells will be drilled out using a hollow stem auger drill rig with fl- <br /> inch outside diameter augers in order to remove all the material present in the original <br /> borehole. The borehole will then be filled with neat cement grout (consisting of 95% <br /> cement and 5 % bentonite). All of the material removed (including filter pack material, <br /> well casing, etc.) will be disposed of at the Forward, Inc. landfill in Stockton, California as <br /> rc95503 8:NwHoll\01.0013217.000 <br /> 3.6.95 <br /> 11101 White Rock Road, Rancho Cordova, CA 95670 (916)638-3696 FAX(916)638-2842 <br /> 40 papw <br />