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Treadwell&Rolb <br /> MEMORANDUM <br /> TO: Lorre Islas-City of Stockton <br /> mak.✓(.1 s r. � <br /> FROM: . Dustyne SutherlandT/ David Dixon <br /> DATE: 24 September, 2004 <br /> PROJECT: Stockton Housing and Redevelopment <br /> Stockton, California <br /> 2597.10 <br /> SUBJECT:. Carando Additional Soil Sampling <br /> This memorandum summarizes the results of the soil sampling conducted by Treadwell&Rollo, <br /> Inc. at the Carando Machine Works Site, and the adjacent City of Stockton owned parking lot. <br /> Treadwell &Rollo, Inc. collected soil samples from two sumps, two equipment pits, and four <br /> test pits at these two locations. <br /> Sampling was conducted in accordance with the 26 March 2004 Soil Management Plan (SMP) <br /> for the Northshore redevelopment project which was prepared under the oversight of the <br /> California Department of Toxic Substance Control(DTSC). The following summarizes the <br /> sampling and analytical results for each of the sites. <br /> City of Stockton Parking Lot <br /> Soil and groundwater sampling conducted by Advanced GeoEnvironmental(AGE) in June 2003, <br /> did not encounter contamination at this site, however, AGE did not sample soil shallower.than 10 <br /> feet deep. Consequently, Treadwell & Rollo collected soil samples in four shallow test pits at <br /> this parcel <br /> On 3 March 2004, four test pits were sampled (CPT:1 through CPT-4) at depths of 1 and 3 feet <br /> below ground surface (Figure 1). The soil samples were analyzed for potential soil contaminants <br /> described in the SMP. Additionally, because a site history review identified that the site was <br /> previously occupied by an electrical company and motor repair shop, soil samples were also <br /> analyzed for polychlorinated biphenyls (PCBs). Soil sample analyses included: <br /> • Total Petroleum Hydrocarbons (TPH) as Diesel (TPHd) and Motor Oil (TPHmo)by <br /> EPA Method 8015M <br /> • Lead and Arsenic by EPA Method 6010 and <br /> • PCBs by EPA Method 8082 <br /> Treadwell&Rollo,Inc.Environmental&Geotechnical Consultants <br /> 555 Montgomery Street,Suite 1300,San Francisco,California 94111 <br /> Telephone(415)955-9040 Facsimile(415)955-9041 <br />