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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> C, <br /> � G Unit Supervisors <br /> c ?, Donna K.Heran,R.E.H.S. Carl Borgman,R.E.H.S. <br /> Director 304 East Weber Avenue, Third Floor g <br /> Mike Huggins,R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> C4C,F 60'' <br /> Ra�P Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. <br /> AMERCO REAL ESTATE CO <br /> jUN 0 3 2003 <br /> REID RINER <br /> 2721 N CENTRAL AVE STE 700 <br /> PHOENIX AZ 85004 <br /> RE: U-Haul #709-50 Site Code: 1772 <br /> 2701 N. Wilson Way RO#: 00574 <br /> Stockton, CA., 95215 <br /> San Joaquin County Environmental Health Department (EHD) has reviewed Remedial <br /> Feasibility Test Report dated February 28, 2003 as submitted by Blaes Environmental <br /> Management (BEM) on April 2, 2003 and has the following comments. <br /> This report covers the installation of additional monitoring wells (MW-10B and 10C) and <br /> installation and testing of an air sparge test well (ASW-1) and vapor extraction test wells <br /> (VEW-1 and 2) in April 2002 under an EHD approved work plan and addendum. <br /> Also included in the report of findings were recommendations of the remedial testing <br /> methods tested after well installations. <br /> The alternatives tested for feasibility and cost-effectiveness were Air Sparging (IAS) <br /> Soil-Vapor Extraction (SVE), Aquifer Pumping (groundwater extraction, GWE), and <br /> Biofeasibility Analysis. Your consultant concluded that IAS in combination with SVE <br /> would be the most feasible and cost-effective when compared to the other alternatives. <br /> EHD appreciates your assertiveness to evaluate remedial alternatives at this point in <br /> your investigation. Underground storage tank (UST) sites are to have the lateral and <br /> vertical extents of the petroleum release delineated before a Remedial Action Plan can <br /> be evaluated or approved. <br /> The presence of dichloroethane (1,2-DCA) in the Frontier Motel drinking water well just <br /> south of the U-Haul site places the U-Haul site in a position of high priority. Immediate <br /> and assertive steps must be taken to identify the extents of the release from your USTs <br /> that has degraded the quality of the drinking water in the area. Further investigation is <br /> required at your site now. All other drinking water wells within a 2000' radius are to <br /> be accessed and sampled if U-Haul cannot verify that their UST release has not <br /> impacted them also. <br />