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NOW <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> G Unit Supervisors <br /> Donna K.Heran,R.E.H.S. <br /> Director <br /> 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> 1; s <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> Program Manager Douglas W.Wilson,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. <br /> C9�%F��ORa`P • _ Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> ANDY EGGIMAN <br /> C/O ROBERT EGGIMAN <br /> PO BOX 580 <br /> MOUNTAIN RANCH CA 95246 <br /> Re: EGGIMANS HYDRAULIC Site Code: 1914 <br /> 1112 E HARDING WAY <br /> STOCKTON, CA 95205 <br /> WORKPLAN: Work Plan to Further Assess ... Extent of Petroleum Hydrocarbons <br /> DATED: September 21, 2005 <br /> PREPARED BY:ATC Associates. Inc. (ATC) <br /> APPROVED >( with Conditions (See Below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN (H&S <br /> 25296.10,(c)(3)•): <br /> 1) Install three direct push soil borings to collect soil and groundwater samples to <br /> approximately 55 feet below surface grade (bsg) to define the lateral extent of the <br /> contamination in soil and groundwater. <br /> 2) Analyze samples for TPH-g, BTEX, and all 5 oxygenates. <br /> COMMENTS AND CONDITIONS: <br /> 1) Analyses must include lead scavengers 1,2-DCA and EDB since 1,2-DCA has <br /> been consistently detected in quarterly sampling events. Detection limit should <br /> be at least 0.5 micrograms per liter (ug/1) and 0.05 ug/1 for 1,2-DCA and EDB, <br /> respectively, since these numbers are the constituents' Primary Maximum <br /> Contamination Levels (MCL) as established by California Department of Health <br /> Services. <br /> 2) Install two additional soil borings, one to the east of MW-7 and MW-4 to define <br /> the eastern extent of the contamination plume, and one to the south of MW-1 to <br /> define the southern extent of the contamination plume. ATC has submitted <br /> additional map showing the location of the 2 additional borings. <br /> 3) Submit fee and permit application to EHD before implementation of work. <br /> 4) Implement proposed work.by October 31, 2005. . <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN (H&S 25296.10,(C)(3).): <br /> None <br /> DATED September 22, 2005 BY <br /> f 0 <br /> Cc: CRWQCB, Central Valley Region—James L. L. Barton, PG <br /> Cc: ATC and Associates, Inc. —Jeanne Homsey, PE <br />