ARCHIVED REPORTS_XR0009186 - Laserfiche WebLink

Home Browse Search

S EC ® R 7-Eleven Store Number 17334 Fuel Line Upgrade Soil Sampling Report July 28, 2003 Page 3 The site is occupied by an operating 7-Eleven convenience store, which is located along the northern portion of the property Two USTs are located In the central portion of the property between the 7- Eleven store and Rosemarie Lane (Figure 2) The concrete drive slab and two dispenser islands are located adjacent and east of the USTs The dispenser islands and UST areas are paved with concrete and the remainder of the site is surfaced with asphalt A portion of the dispenser island and UST concrete pads were removed during the fuel line upgrade activities FIELD ACTIVITIES Dispenser and Fuel Line Sample Collection and Analyses On April 4, 2003, SECOR's field scientist collected a total of four soil samples in native soil two samples were collected under the fuel dispensers and two samples were collected under the fuel lines northeast of the UST pit All samples were collected under the direction of a SJCEHD representative Each soil sample was screened for hydrocarbon vapors using a portable photoionization detector (PID) Soil samples were collected In clean, 2-inch diameter by 6-inch-long brass sample tubes A SECOR scientist used a hand auger to extract soil then, pounded a sample tube into the soil in the center of the auger The sample tube was filled completely with soil to • minimize headspace and sealed using Teflon® tape and plastic end caps Each soil sample was labeled and placed in a cooler on ice for delivery to Kiff Analytical in Davis, California All soil sampling equipment was cleaned with a non-phosphate detergent solution and rinsed with tap water followed by a distilled water rinse to reduce the possibility of cross-contamination between sample locations Copies of the field notes are included in Attachment B and the soil sample locations are shown on Figure 1 The soil samples were analyzed for TPHg, benzene, toluene, ethylbenzene, and total xylenes (BTEX), MtBE, di-isopropyl ether (DIPE), tert-amyl-methyl ether (TAME), ethyl-t-butyl ether (ETBE), and tent-butyl alcohol (TBA) using Environmental Protection Agency (EPA) Method 8260B Soil k samples were also analyzed for total lead using EPA Method 6010B RESULTS Soil Sample Analytical Results The analytical results are presented in Figure 2 and are summarized In Table 1 Copies of the analytical reports and chain-of-custody documentation are included in Attachment C A soil sample (1-2-5 0`) collected along the product lines contained 0 012 mg/kg of MtBE No petroleum hydrocarbon constituents were detected while analyzing dispenser soil samples (D1 and D2) and one product line sample (L1) The concentration of total lead in the four soil samples ranged from 5 04 to 18 mg/Kg SUMMARY AND CONCLUSIONS One of the four soil samples obtained beneath the dispenser islands and fuel lines contained a MtBE • concentration of 0 012 mg/Kg The concentration of total lead in the four soil samples ranged from 5 04 to 18 mg/Kg File 7-Eleven/Store 17334/Reports/17334 Fuel Line Upgrade Report doc SECOR Intemational Incorporated