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0 LFR • 0 <br /> interfaces) was being transmitted through the back pressure valve at the time the release was <br /> observed. <br /> SFPP contacted LFR Inc. (LFR) and NRC to request assistance with containment and recovery of <br /> the released product and removal (e.g., excavation) of petroleum-affected surface gravel and <br /> shallow soils. Based on visual observations made on July 24, 2006, it appears that the product <br /> released from the back pressure valve collected onto the containment pad supporting the valve <br /> assembly and spread on the ground surface across an irregular area of approximately 20- by 30- <br /> foot wide within the manifold area and an 8- by 30-foot wide section along the southeastern <br /> concrete firewall (Figure 2). According to SFPP personnel, approximately 84 gallons of product <br /> was recovered from the interior of the containment pad. An estimated 20-25 gallons of additional <br /> product was recovered from a surface water catch basin to the northeast of the containment pad. <br /> This catch basin is not connected to the regional sewer system. All piping associated with this <br /> basin will be flushed out to remove residual product. <br /> Initial containment and recovery activities included the pumping of product contained in the back <br /> pressure containment pad and the catch basin into the onsite oil-water separator using pneumatic <br /> pumps. A small quantity of product was also recovered from the valve assembly containment pad <br /> using absorbent pads. Spent pads were placed in properly-labeled 55-gallon drums pending offsite <br /> disposal. <br /> Objective <br /> The objective of the proposed soil sampling and analysis activities is to confirm the substantial <br /> removal of product-affected gravel and soil associated with the back pressure valve release prior to <br /> initiating backfill activities. <br /> This objective will be achieved through the collection of confirmation soil samples and laboratory <br /> analysis of the collected soil samples for total petroleum hydrocarbons as jet fuel (TPH —jet fuel), <br /> diesel (TPH — diesel), gasoline (TPH — gas) and benzene, toluene, ethylbenzene, and total xylenes <br /> (BTEX) compounds, as described below. <br /> Proposed Scope of Work <br /> Product Recovery and Soil Excavation Activities <br /> Product recovery will be conducted using pneumatic pumps and absorbent pads deployed in small <br /> sumps and ditches that will be hand excavated within the impacted area. Product recovered during <br /> these activities will be pumped into the on site oil-water separator. Attempts will be made to gauge <br /> the volume of recovered product. <br /> Excavation activities will include the removal of product-affected gravel, fill, and/or native soil <br /> using appropriate hand equipment and continued until fresh product staining is no longer evident <br /> on the exposed soil surface. Excavated gravel and soil material will be placed into properly labeled <br /> 2 <br />