ARCHIVED REPORTS_XR0006670 CASE 1

Home Browse Search

r� k1 Sol Boring trwestigedon Remift Report 707 E Yosemite Ave Manteca CalHornla i SCOPE The following scope of work was conducted according to the Aegis standard operating procedures included in Attachment 2 • Three soil borings (SB-1, S13-2 and S13-3) were drilled, logged and sampled to 15 feet below grade each, adjacent to the UST basin and the dispenser islands, • Selected soil samples were submitted to a state-certified laboratory and analyzed for total petroleum hydrocarbons (TPH), as gasoline, TPH, as diesel, and benzene, toluene, ethlybenzene and total xylenes (BTEX) • After completion, each soil boring was grouted to the surface with a bentonite cement slurry • This letter report was prepared documenting the results of the investigation SITE DESCRIPTION . The 707 East Yosemite site is an active mini-mart/carwash that retails unleaded gasolines and diesel The site is located within a commercial area of Manteca, on the northeast corner of the intersection of East Yosemite and Washington Streets (Figure 1) The site includes two 10,000-gallon and one 8,000-gallon UST, two dispenser islands and a mini- mart/carwash budding BACKGROUND The three steel UST are approximately 30 years old In January 1987, Canonie Environmental, of Stockton, California, trenched and collected sod samples from beneath the dispenser islands and adjacent to the UST Soil analysis indicated volatile hydrocarbon concentrations ranged from below detection limits to 30 parts-per-million (ppm) Approximately half of one cubic yard of hydrocarbon impacted soil was removed from the UST/product piping connection area In November 1987, Armor-Seal, of Cincinati, Ohio, tested the UST integrity, fiberglassed all UST and replaced the product and vapor piping The UST have been Petrotite-tested annually since 93-042A RER -2-