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File No. 20-3978-0I.P02 kn K L E IN F E L D E R November 5, 1996 Two Hydropunch IIT^" soil borings will be advanced at each septic system location. One boring will be located adjacent to each septic tank, and one boring will be advanced in the septic system leachfield. Prior to advancing the septic system borings, Kleinfelder will attempt to confirm the septic tank and leachfield locations. It is anticipated that the septic tanks are buried at a depth of one to two feet below grade. Kleinfelder will use a metal probe and existing site plans to locate the septic tanks. Kleinfelder will attempt to locate the leach fields by exposing the ends of each septic tank to find the connection between the tank and the leach field piping. The ends of the septic tanks will be exposed by excavating soil with a shovel. The anticipated leach field locations are shown on Plate 2. The Hydropunch IITM soil borings will be advanced using a truck-mounted drill rig equipped with 6-inch diameter hollow stem augers. Soil samples will be collected beginning at a depth of 5 feet and every 5 feet thereafter for logging purposes and potential chemical analysis. The borings will be drilled, logged, and sampled according to the protocol described in Attachment B. The soil samples collected will be field screened using an organic vapor detector as described in Attachment B, Section B-2.2. The borings will be advanced to a maximum depth of 30 feet or until groundwater is encountered. Based upon previous investigations at the Spreckels property, groundwater is anticipated to be at a depth of 20 to 27 feet below grade. Groundwater samples will be collected using a Hydropunch IIT' sampling device as described in Attachment B, Section B-2.4. The soil borings will be closed in accordance with the protocol described in Attachment B. Soil cuttings generated while drilling will be placed on and covered by visqueen and stored on site pending chemical analysis. Water generated during steam cleaning of auger and/or equipment will be left on site in labeled 55-gallon drums. Analysis and disposal of drill cutting and steam cleaning water is not included in this proposal. Laboratory Analysis Each of the soil and water samples selected for quantitative analysis will be submitted under chain-of-custody control to Sequoia Analytical Laboratories (Sequoia) of Sacramento, California. Sequoia is certified by the California Department of Toxic Substances to perform the requested analyses. It is anticipated that samples will be analyzed on a normal laboratory turnaround schedule, which usually requires approximately 10 to 15 working days. 20-3978-01.P02IMP960129 Page 4 of 9 01996,KteinJleder, Inc.