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File No. 20-3978-01.W 16 KLEINFELDER <br /> January 8, 1997 <br /> According to the April 1989 site closure report, five soil samples were collected to confine the <br /> removal of the copper blast material. The five confirmation samples were analyzed for'the <br /> concentration of copper and lead. The results reported were less than the TTLC and <br /> background soil concentrations established during the John Minney investigation. <br /> Concentrations of arsenic, chromium, molybdenum and zinc were not reported. <br /> Kleinfelder is currently conducting site assessment activities at the former Spreckels Sugar <br /> Plant in Manteca. The site assessment was initiated based on the results of a Phase I ESA <br /> conducted at the site by Kleinfelder (20-3978-O1.P01 dated October 18, 1996). The San <br /> Joaquin County Public Health Services Department, Environmental Health Division <br /> (PHS/EHD) is the local regulatory agency involved in workplan review and permitting for the <br /> site assessment work. The PHS/EHD has requested that the former copper blast area be <br /> evaluated as part of the ongoing evaluation of the Spreckels property. <br /> SCOPE OF WORK <br /> Drilling Permit and Work Plan Submittal <br /> Kleinfelder will collect soil samples from borings. The San Joaquin County Public Health <br /> Services Department Environmental Health Division (PHS/EHD) requires a workplan and <br /> boring permit application for exploratory soil borings drilled for site assessment purposes. The <br /> proposed will require permits. A workplan will be submitted to the PHS/EHD for review. <br /> Kleinfelder will also prepare a health and safety plan for use in the field. The health and safety <br /> plan will be included as part of the workplan. <br /> Drilling of Borings and Soil Sample Collection <br /> A total of ten exploratory soil borings will be drilled in the vicinity of the former chemical <br /> warehouse (Plate 2). The borings will be advanced using a truck-mounted drill rig equipped <br /> with 6-inch diameter hollow stem augers. Soil samples will be collected beginning at a depth <br /> of 5 feet and every 5 feet thereafter for logging purposes and potential chemical analysis. The <br /> borings will be drilled, logged, and sampled according to the protocol described in Attachment <br /> B. The soil samples collected will be field screened using an organic vapor detector as <br /> described in Attachment B, Section B-2.2. The borings will be advanced to a maximum depth <br /> of 15 feet or until groundwater is encountered. Based upon previous investigations at the <br /> Spreckels property, groundwater is anticipated to be at a depth of 20 to 27 feet below grade. <br /> Groundwater samples will not be collected. <br /> The soil borings will be closed in accordance with the protocol described in Attachment B. <br /> Soil cuttings generated while drilling will be placed on and covered by visqueen and stored on <br /> site pending chemical analysis. Water generated during steam cleaning of auger and/or <br /> equipment will be left on site in labeled 55-gallon drums. Analysis and disposal of drill cutting <br /> and steam cleaning water is not included in this proposal. <br /> 10-3978-01.W161207PE014 Page 2 of Copyright 1997, Kleinfelder, Inc. <br />