SITE INFORMATION AND CORRESPONDENCE_CASE 2 FILE 1

Home Browse Search

'Mr. Ron Rowe September 19, 1997 CAMBRIA PROPOSED SCOPE OF WORK Shell has contracted Elite N Contractors,Inc. (Elite N) of Stockton, California to remove and replace the three hoists at the site. Upon removal,a Cambria representative will collect soil samples from the bottom of each hoist excavation. If elevated hydrocarbon concentrations are detected using field screening methods, additional soil samples will be taken further from the source to define the extent of hydrocarbons in soil. Soil samples will be analyzed for total petroleum hydrocarbons as hydraulic oil(TPHho) and benzene,toluene, ethylbenzene, and xylenes (BTEX). Our scope of work for this investigation includes the following tasks. , Site Health and Safety Plan: We will prepare a comprehensive site safety plan to protect site workers. The plan will be kept on site during field activities and signed by each site worker. Permits: Permitting and regulatory correspondence for this project is being handled by Elite IV with assistance from Cambria,as necessary. Sampling The objective of sample collection during routine dispenser, piping, and hoist removals is to determine whether hydrocarbons or other stored chemicals have leaked to the subsurface. We will collect soil samples from the native soil beneath each hoist unit. The soil samples are collected in steam cleaned brass or steel tubes by driving a split-spoon type sampler into native soil or soil in a backhoe bucket. When a backhoe is used, approximately three inches of soil are scraped from the surface and the tube is driven into the exposed soil. In addition, soil samples will be collected from the stockpile. . Upon removal from the split-spoon sampler or the backhoe, the samples are trimmed flush, capped with Teflon sheets and plastic end caps, labeled,logged and refrigerated for delivery under chain of custody to a State certified analytic laboratory. I Chemical Analysis: Soil samples will be analyzed for TPHho by modified EPA Method 8015, and BTEX by EPA Method 8020. Stockpile samples will also be analyzed for total lead by EPA Method 6010. Reporting: After we receive the analytic results,we will prepare a hoist sampling report that,at a minimum, will contain: • A summary of the site background and history; j • Descriptions of the soil sampling methods; 2 �