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The Denali Group <br /> 2255 Morello Ave.,Suite 170 Tel:(925)602-2333 x 101 <br /> Pleasant Hill,CA 94523 Fax:(925)687-1255 <br /> Website:www.thedenaligroup.com <br /> December 16, 2005 [REC EN D <br /> Mr. Harlin Knoll , L-`' 2 1 2005 <br /> Environmental Health Specialist ENVIRONMENT HEALTH <br /> San Joaquin County Environmental Health Division PERfAT/SERVICES <br /> 304 East Webber Avenue <br /> Stockton, California 95202 <br /> Subject: Work Plan for Limited Soil Investigation <br /> RILCO Farm Operations Center <br /> Stewart and Cohen Road <br /> Lathrop, California 95330 <br /> Dear Mr. Knoll: <br /> On behalf of River Islands at Lathrop, (River Islands), the Denali Group (Denali) has <br /> prepared this Work Plan to perform a limited subsurface soil investigation at the RILCO <br /> Farm Operations Center (Site). Figure 1 — Location Map illustrates the Site is located at <br /> the intersection of Stewart and Cohen Roads approximately 1 mile northwest of the <br /> Mossdale harbor, Lathrop, California. <br /> Denali understands that a drilling permit and work plan is required to be filed with the <br /> San Joaquin County Environmental Health Division (SJCEHD). Denali will be using <br /> EnProb Environmental Probing, a licensed C-57 driller, for subsurface sample <br /> collection. <br /> The River Islands development design includes excavation of the Site area. The <br /> purpose of this limited soil investigation is to ascertain the presence of residual <br /> pesticides and other chemicals of concern used during Site operations. <br /> The general scope of the investigation is based on a Phase I Environmental Site <br /> Assessment (Phase I ESA) prepared by Denali (2003). Site operations have included <br /> pesticide storage, handling and mixing, equipment maintenance, equipment steam <br /> clean and washout, and fueling operations. <br /> The following scope of work describes the soil and groundwater sample collection <br /> methodology. The sampling locations are shown on Figure 2 — Sample Location Map. <br />