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Ms. Kasey Foley
<br /> Fuel System Upgrade Report
<br /> September 22, 2003
<br /> Page 3
<br /> UST Removal Activities
<br /> Due to contamination found in the soil and groundwater during upgrade activities and the discovery
<br /> of air bubbles between the UST and outer lining, the SJCEHD required 7-Eleven to remove and
<br /> replace the three USTs on-site. On May 29, 2003, two 10,000-gallon USTs and one 15,000-gallon
<br /> double-walled fiberglass UST were removed from the excavation and hauled off-site. Prior to their
<br /> removal, Glacier thoroughly rinsed and evacuated any remaining petroleum residue within the three
<br /> USTs. The USTs were then exposed to and inerted with dry ice. Approximately 1,500 gallons of
<br /> rinsate water generated during the tank cleaning operation was transported under Uniform
<br /> Hazardous Waste Manifest to Crosby and Overton in Long Beach, California for proper disposal on
<br /> May 30, 2003. After confirmation by the SJCEHD that the three USTs were properly inerted, Glacier
<br /> removed the USTs from the excavation for inspection. Ms. Kasey Foley, the Hazardous Material
<br /> Inspector with the SJCEHD, observed the UST removal. Each UST appeared to be in good
<br /> condition, with no apparent holes or cracks; however, each had a small tear in its outer shell due to
<br /> damage sustained during UST removal. Tank pit soil sample collection was postponed pending the
<br /> excavation of residual pea gravel from the tank pit. On May 29, 2003, MP Environmental hauled the
<br /> USTs to Golden State Metals in Bakersfield, California for recycling. Copies of the field notes are
<br /> included in Attachment B. Copies of waste disposal confirmation sheets and a SJCEHD UST
<br /> disposition tracking record for each UST removed are provided in Attachment C.
<br /> Stockpiled Soil and Pea Gravel Collection
<br /> On May 28, 2003, Glacier began excavating and stockpiling pea gravel and soil onsite. On June 2,
<br /> 2003, soil samples and pea gravel samples were collected from each stockpile by advancing 2-inch
<br /> diameter brass sample liners, removing approximately 6 inches to 1 foot of surface material at each
<br /> sample location. A total of four brass sleeves were collected at three locations of the soil stockpile
<br /> (SP1-[ABCD], SP2-[ARCD], SP3-[ABCD]) and at three locations of the pea gravel stockpile (SP4-
<br /> [ABCD], SP5-[ABCD] and SP6-[ABCD]). Each brass sleeve was labeled and capped with Teflon®
<br /> sheets and plastic end caps. The samples were then sealed in zip-lock bags, placed on ice, and
<br /> transported to the laboratory accompanied by the appropriate chain-of-custody documentation. The
<br /> sample sleeves were combined in the laboratory into a single composite soil sample and analyzed
<br /> for TPHg, BTEX, MTBE, DIPE, ETBE, TAME and TBA by EPA Method 8260B, and for total lead by
<br /> EPA Method 6010B.
<br /> Tank Pit Dewatering and Water Sample Collection
<br /> On May 29, 2003, following the removal of the USTs, water was visible at the bottom of the tank pit
<br /> excavation. In order to accommodate the new USTs, the tank pit was dewatered between June 2
<br /> and 16, 2003, and the excess water was stored in a 20,000-gallon Baker tank. Prior to dewatering of
<br /> the tank pit, a water sample was collected from the center of the excavation (W3). A water sample
<br /> was also collected from the Baker tank (T. Bank) on the same date. On June 16, 2003, a second
<br /> water sample was collected from the Baker tank (BT-2) at the site. Groundwater samples were
<br /> submitted to Kiff for analysis of TPHg, BTEX, MTBE, DIPE, TAME, ETBE and TBA using EPA
<br /> Method 8260B. Copies of the field notes are included in Attachment B.
<br /> 32262 Fuel Line&USTs Upgrade Report.doc SECOR International Incorporated
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