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ERM-West,Inc. <br /> 1777 Botelho Drive <br /> Suite 260 <br /> �1'i F' � 5 1994 Walnut Creek, CA 94596 <br /> May 24, 1994 <br /> (510)946-0455 <br /> (510)946-9968(Fax) <br /> ENVIRCNMENTAL HEALTH <br /> p KIMITISERVICES <br /> Ms. Mary Meays <br /> Senior REHS <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 445 North San Joaquin Street <br /> Stockton, California 95201 <br /> Subject: Proposal for Additional Soil ERM <br /> Characterization <br /> 1325 &1515 West Weber Avenue <br /> Stockton, CA <br /> Dear Ms. Meays: <br /> On behalf of Catellus Development Corporation (Catellus), ERM-West, Inc., is <br /> pleased to transmit this letter workplan describing proposed field activities for <br /> the properties at 1325 and 1515 West Weber Avenue in Stockton, California. <br /> These proposed activities address concerns voiced by the San Joaquin County <br /> Public Health Services Environmental Health Division (PHS/EHD) that the <br /> extent of TPH-affected soils associated with former underground storage tanks <br /> on the properties may not have been adequately delineated. <br /> Our understanding is that PHS/EHD is specifically concerned regarding residual <br /> chemical concentrations that may remain in soils within the former excavation <br /> areas and beneath buildings on the properties. These concerns were discussed at <br /> a April 13, 1994, meeting between Catellus and PHS/EHD representatives, and a <br /> mutually agreed general plan of characterization was developed. By performing <br /> the field activities described in this letter workplan, ERM-West believes that <br /> PHS/EHD's requirements for site characterization will be fulfilled, allowing <br /> closure of the sites. <br /> During the April 13, 1994, meeting, Catellus agreed to conduct additional soil <br /> sampling within the area of the former excavations and the building footprints <br /> to verify that chemical concentrations present in site soils do not pose a <br /> significant risk to human health and the environment. ERM-West plans to <br /> conduct the additional sampling via soil borings drilled with a hollow stem <br /> auger rig and/or hydraulic drive point system. The proposed sampling <br /> locations, protocols, and analytical methodologies are described below. <br /> A Member of the Environmental <br /> Resources Management Group <br />