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SNrFN <br /> ENVIRONMENTAL TECHNOLOGIES CORPOflAT10N <br /> February 19, 1997 <br /> 97715 <br /> Ms, Margaret Laggorio <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 388 <br /> Stockton, California 95201 <br /> Subject: Workplan for Phase II Environmental Site Investigation at Proposed Taft <br /> Detention Basin, 3707 S. El Dorado Street, Stockton, California <br /> Dear Ms. Laggorio: <br /> Smith Technology Corporation, on behalf of the City of Stockton Department of Public Works <br /> (DPW), has prepared this document to serve as a workplan for a site investigation at the above <br /> referenced site (Figure 1). The DPW requested this investigation as part of a property transfer. The <br /> DPW has a Right of Entry from the property owner, William Scott of Scott Properties, (see <br /> attachment) to conduct the investigation. The purpose of the site investigation is to evaluate <br /> potential environmental concerns at the proposed location of the Taft storm basin. According to <br /> the DPW, the site has been vacant in the past. Thus, the most likely source of any potential <br /> adverse soil impaction at the site is from on-site surface spills. <br /> PROPOSED SCOPE OF WORK <br /> Smith Technology proposes the following scope of work to evaluate potential residual soil <br /> contamination at the subject site. <br /> Advance Four Soil Borings, Soil Sample Collection and Analysis <br /> This task includes mobilization to the site, advancing four soil borings, collecting soil samples, and <br /> backfilling the borings to the surface with a neat cement grout. <br /> Four borings will be advanced to depths of approximately 20 feet below ground surface (bgs) <br /> using truck mounted Geoprobe® narrow diameter, direct push technology. Drilling will be <br /> conducted by a State licensed (C57) drilling company. A field geologist will be present to log all <br /> soil samples. Descriptions of soil types encountered and sample collection intervals will be <br /> recorded on boring logs. Soil samples will be collected at three feet bgs and at five-foot intervals. <br /> w:V77154eports\ssiwkp.doc t <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering • Consulting • Remediation • Construcdon <br />