ARCHIVED REPORTS XR0003327 - Laserfiche WebLink

Home Browse Search

i August 10, 1998 FLUOR DANIEL GTI Mr Harlin Knoll San Joaquin County Public Health Services Environmental Health Division 304 E Weber Avenue, Third Floor P O Box 388 Stockton, California 95201-0388 RE Executive Summary Southland Store No 20632 4627 DaVinci Drive Stockton, California Dear Mr Knoll The following includes a summary of past environmental activities and proposed activates to be completed at the subject site Background The subject site is located on the west side of DaVinci Drive south of March Lane in Stockton (Attachment 1, Figure 1) The site is owned by the Soutland Corporation and currently contains three 10,000-gallon USTs and associated fuel dispensers On February 21, 1997, Fluor Daniel GTI supervised the advancement of six angled and four vertical geoprobe borings (GP-1 through GP-10) at the site (Attachment 1, Figure 2) Soil samples were collected from the borings at vertical depths of 5 feet to 15 feet below ground surface (BGS) The six angled borings (GP-1 through GP-6)were drilled beneath the three 10,000-gallon USTs at the site as required by the SJCPHS prior to tank-lining permit approval In addition, groundwater grab samples were collected from borings GP-1, GP-5, and GP-7 through GP-10 The highest benzene, methyl-tert-butyl ether(MTBE), and total petroleum hydrocarbons as gasoline (TPH-G) concentrations in the soil samples collected from the borings drilled February 21, 1997, were reported in sample GP-3-5' at 0 44 milligrams per kilogram (mg/kg), 12 mglkg, and 150 mg/kg, respectively The highest benzene, MTBE, TPH-G concentrations in groundwater samples collected February 21, 1997, were reported in sample GP-1 at 390 micrograms per liter(pg/L), 16,000 pg/L, and 16,000 pg/L, respectively MTBE, which was reported in sample GP-8 at a concentration of 1,600 pg/L, 20632EXE LTR 757 Arnold Drive, Suite D /Martinez, CA 94553 USA (510) 370-3990 FAX (510) 370-3991