Laserfiche WebLink
File No. 20-3978-0 LP02 h4 K L E INF E L D E R <br /> November 14, 1996 <br /> Drilling of Borings and Soil Sample Collection <br /> A total of 14 Hydropunch IIT"" soil borings will be drilled in the vicinity of the septic <br /> systems (refer to Plate 2). <br /> Septic System Location Number of Borings <br /> Septic Tank Leachfield <br /> Former Cottages 2 —2 <br /> — <br /> Administration Building 2 2 <br /> Processing Plant 2 4 <br /> Prior to advancing the borings, Kleinfelder will attempt to confirm the septic tank and <br /> leachfield locations. It is anticipated that the septic tanks are buried at a depth of one to <br /> two feet below grade. Kleinfelder will use a metal probe and existing site plans to locate <br /> the septic tanks. Kleinfelder will attempt to locate the leach fields by exposing the ends <br /> of each septic tank to find the connection between the tank and the leach field piping. <br /> The ends of the septic tanks will be exposed by excavating soil with a shovel. The <br /> anticipated leach field locations are shown on Plate 2. <br /> The Hydropunch IITM" soil borings will be advanced using a truck-mounted drill rig <br /> equipped with 6-inch diameter hollow stem augers. Soil samples will be collected <br /> beginning at a depth of 5 feet and every 5 feet thereafter for logging purposes and <br /> potential chemical analysis. The borings will be drilled, logged, and sampled according <br /> to the protocol described in Attachment B. The soil samples collected will be field <br /> screened using an organic vapor detector as described in Attachment B, Section B-2.2. <br /> The borings will be advanced to a maximum depth of 30 feet or until groundwater is <br /> encountered. Based upon previous investigations at the Spreckels property, groundwater <br /> is anticipated to be at a depth of 20 to 27 feet below grade. Groundwater samples will be <br /> collected using a Hydropunch III' sampling device as described in Attachment B, <br /> Section B-2.4. <br /> The soil borings will be closed in accordance with the protocol described in Attachment <br /> B. Soil cuttings generated while drilling will be placed on and covered by visqueen and <br /> stored on site pending chemical analysis. Water generated during steam cleaning of <br /> auger and/or equipment will be left on site in labeled 55-gallon drums. Analysis and <br /> disposal of drill cutting and steam cleaning water is not included in this proposal. <br /> 20-3978-01.P02/MP960139 Page 2 of 01996, Kleinfelder, Inc. <br />