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Monitoring Well Destruction and <br /> Soil and Groundwater Investigation Report <br /> US Can—Welty Road September 24,2009 <br /> regarding field methods employed during the well destruction arerovided in <br /> p Appendix C. <br /> Copies of the Well Completion Reports as submitted to the DWR are included as Appendix D. <br /> 3.2.2 Soil and Groundwater Investigation <br /> To define the extent of affected soil and groundwater at the site, SAIC directed subcontractor <br /> 1 RSI Drilling to advance a total of 27 soil borings from which soil and/or groundwater samples <br /> were collected. The samples were submitted to Lancaster Laboratories, Inc. (Lancaster; <br /> California State-certified laboratory, Environmental Laboratory Accreditation Program [ELAP] <br /> License Number 2116) for analysis of the COPCs using methods contained in the EPA <br /> publication SW-846 (EPA, 2008b). <br /> 1 Soil samples were analyzed by Lancaster for the following COPCs <br /> • TPH quantified as crude oil (TPHc; C10-C36 carbon range) using SW-846 Method 801513; <br /> • BTEX using SW-846 Method 826013, and <br /> • PAHs using SW-846 Method 8270 using selective ion monitoring. <br /> Groundwater samples were analyzed by Lancaster for the following COPCs: <br /> • TPHd (Cto-C28) with and without a silica-gel cleanup using SW-846 Method 801513; <br />' • BTEX using SW-846 Method 826013; and <br /> • PAHs using SW-846 using Method 8270 large-volume injection. <br /> Selected soil samples showing evidence of petroleum hydrocarbons were submitted to Chevron <br /> Energy Technology Company (CETC) laboratory for fuel fingerprint analyses. <br /> Information regarding field and sampling methods employed during the field investigation are <br />' provided in Appendix C. <br /> 3.3 INVESTIGATION-DERIVED WASTE <br /> Soil cuttings, decontamination water, and debris from the well destruction and subsurface <br /> investigation activities were stored in properly labeled U.S. Department of Transportation-rated, <br /> 55-gallon steel drums. Sturgeon and Son, Inc. removed the drums from the site and transported <br /> 1 them to storage at the Richmond Refinery pending disposal at a CEMC-approved landfill. The <br /> soil drums were transported to Keller Canyon Landfill on April 20, 2009. Decontamination <br /> water and debris were transported to Altamont Landfill on several dates between December 29, <br /> 2008, and May 18, 2009. <br /> 4. FINDINGS <br />' 4.1 SUBSURFACE CONDITIONS <br /> Soil and groundwater investigation activities were conducted during three separate <br /> 1 mobilizations: August 11 through August 18, 2008; November 17 through November 25, 2008; <br /> and March 3 through March 5, 2009. RSI Drilling advanced a total of 27 soil borings (SB-18 <br /> through SB-24, S13-24a, and SB-25 though S13-43) during the three field events. The borings <br /> were advanced to total depths ranging from 10 to 88 feet bgs. Companion boring S13-24a was <br /> advanced a few feet from SB-24 to collect a groundwater sample at the appropriate interval. <br /> 5 - ip3w <br /> �s <br /> Sam <br /> Erni`.® <br />' From Science to Solutions <br />