ARCHIVED REPORTS XR0000440 - Laserfiche WebLink

Metadata

Thumbnails

Annotations

ARCO Products Company 3 ARCO Service Station 2133,2908 Ben amen Holt Dr,Stockton CA July 7, 1999 samples with concentrations ranging from 0 0517 mg/kg to 124 mg/kg Oxygenates DIPE, TAME, EtBE, TBA, and Ethanol were reported as nondetect in all samples Lead was reported In twenty-five samples with concentrations ranging from 8 2 mg/kg to 35 mg/kg Product fine, vapor line, and dispenser soil analytical data are presented in Table 1 and soil sample locations are shown on Figure 3 Field and laboratory procedures are presented as Attachment A Certified analytical reports and chain-of- custody documentation are presented as Attachment B Groundwater- UST Excavation and USTs During the UST replacement and upgrade activities, the majority of the two USTs not replaced were filled with tap water to help hold the USTs down during construction activities Additionally, groundwater was encountered within the UST excavation at a depth of approximately 13 feet bgs On March 19, 1999, Henderson Construction pumped a total of approximately 17,000 gallons of water from inside the USTs and from the UST excavation to a Baker Tank onsite (approximately 14,000 gallons form the USTs and 3,000 gallons from the excavation) Water stored in the Baker Tank was then treated by running the water through two 200-pound carbon canisters Once the water was treated, it was discharged into the sanitary sewer in compliance with the City of Stockton Wastewater Discharge Permit obtained for the site (Attachment C) Stockpiled Soil Removal Approximately 450 61 tons of soil generated during the removal of the UST, product lines, vapor lines, and dispensers were stockpiled onsite Approximately 140 tons of pea gravel were stockpiled onsite in a separate pile Samples were collected from each of the stockpiles for characterization Analytical results from stockpiled pea gravel were nondetectable for all constituents analyzed, and with the approval from Lori Duncan with the SJCEHD, the pea gravel was re-used onsite The 450 61 tons of soil was hauled by Dillard Environmental Services on May 30 and April 2, 1999 for disposal at BFI's Landfill in Livermore, CA Stockpiled soil analytical data is presented in Table 2 Certified analytical reports and chain-of-custody documentation are presented as Attachment B and soil disposal certificates are included as Attachment D SUMMARY OF FINDINGS • TPH-g and benzene were reported in one of the two soil samples collected from the UST excavation at concentrations of 690 mg/kg and 0 692 mg/kg (T-3W-15'), respectively MtBE was reported in both soil samples at a maximum concentration of 0 156 mg/kg (T-3E- 15') Fuel oxygenates TBA, DIPE, EtBE, TAME, and Ethanol were reported as nondetectable TPH-g and benzene were reported in six of thirty-two soil samples collected from beneath the product lines, vapor lines, and dispensers 7G600-019-04/PULL.DOC