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DAMES & MOORE <br /> 8801 FOLSOM BOULEVARD, SUITE 200, SACRAMENTO, CALIFORNIA 95826 <br /> (916) 387-8800 FAX (916) 387-0802 <br /> May 2, 1995 <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 388 <br /> Stockton, California 95201-0388 <br /> Attention Mr Steve Sasson <br /> Re- Addendum to Work Plan <br /> Former AFPC Facility <br /> Stockton, California <br /> Dear Steve <br /> On behalf of American Forest Products Company (AFPC), Dames &Moore is providing you <br /> with this Addendum to the Work Plan submitted November 1, 1994 for the subject site The Work <br /> Plan proposed a soil boring in close proximity to the former 500 gallon waste oil tank in order to <br /> obtain soil samples for Total Petroleum Hydrocarbons (TPH) analysis and to install a four-inch <br /> diameter monitoring well in the soil boring The proposed well is identified as DMW-5 on Figure 1 <br /> This Addendum describes the completion of two additional soil borings at the site, discusses analysis <br /> of samples from the site, and address items that we discussed by phone on May 1 and May 2, 1995 <br /> Additional Borings <br /> The additional soil borings described in this Addendum will be used only to collect soil <br /> samples for laboratory analysis As shown on Figure 1, soil baring SB-1 will be located <br /> approximately 50 feet southeast of the former waste oil tank, and soil boring SB-2 will be located <br /> approximately 25 feet north of the north end of the former diesel tank The selected Iocalions for <br /> the borings are anticipated to represent areas of the site with the highest residual levels of' PH and <br /> were based on review of previous sampling results including samples obtained at the completion of <br /> soil excavation activities completed in 1990 (Figure 2) <br /> The two borings will be completed to 50 below ground surface (bgs) Groundwater is <br /> expected to be about 55 feet bgs Starting at 20 feet bgs, the borings will be sampled every 5 feet <br /> and at significant changes in lithology and will be continuously logged using the Unified Soil <br /> Classification System The soil boring and sampling procedure will be as described in the <br /> SAC149 05 <br /> OFFICES WORLIMDE <br />