Laserfiche WebLink
Applied GeoSystems 4191-E Power Inn Road, Sacramento, CA 95826 (916) 452{-2901 <br /> • FREMONT • IRVINE • HOUSTON • BOSTON • SACRAMENTO V I l M OSE <br /> MAY 1 8 ?^^O <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> May 15, 1990 <br /> 0403LCOT <br /> 30041-1 <br /> Ms. Laurie Cotulla <br /> San Joaquin Public Health Service <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> Subject: San Joaquin Public Health Service Guidelines for installation of underground <br /> gasoline tanks and associated environmental investigations. <br /> Ms. Cotulla: <br /> At ARCO Products Company's (ARCO) request, Applied GeoSystems is writing to request <br /> clarification of guidelines set by the San Joaquin Public Health Service (SJPHS) for <br /> installing underground gasoline-storage tanks. We are concerned with sampling guidelines <br /> for obtaining approval to install new tanks after obtaining analytical results for soil samples <br /> collected from the bottom of the new tank cavity. We are not concerned with obtaining a <br /> permit to remove the tanks. <br /> We are in the process of writing work plans for ARCO to conduct a preliminary site <br /> investigation before tank removal. ARCO plans to install new tanks either (1) in an <br /> adjoining tank cavity as illustrated on Plate P-1, or (2) in a separate tank cavity as <br /> illustrated in Plate P-2. We would like clarification of the SJPHS guidelines for installing <br /> new tanks in both these situations before the tank removal. <br /> Soil borings will be drilled in the proposed tank cavity to a depth of 20 feet below grade, <br /> soil samples collected from 10, 15, and 20 feet below grade, and submitted to a State- <br /> Certified Laboratory for appropriate analyses. It is our opinion that if analytical results of <br /> soil samples from the borings indicate the soil is free of hydrocarbons, the tanks can be <br /> installed in the new tank cavity without further laboratory analyses. <br /> We called your staff in Group 2 to inquire about tank installation guidelines in an adjoining <br /> tank cavity and a proposed tank cavity at a site where there is no previous knowledge of <br /> hydrocarbons in the soil or water. We stated we would drill two soil borings in the new <br /> tank area. Your staff indicated that might be sufficient but was unsure of the guidelines <br /> on this issue. <br /> We also called your staff in Group 3 to ask if two soil borings in proposed tank cavity <br /> locations are sufficient to provide enough data to install the tanks in the new location <br />