Laserfiche WebLink
a <br /> STATE O4F GALIFC9NIA — ENVIRONMENTAL PROTECTION AGENCY PETE WILSON, Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION •--"- <br /> 3443 ROUTIER ROAD, SUITE A sc. <br /> SACRAMENTO, CA 95827-3098 , P^ <br /> PHONE: (916) 255-3000 <br /> FAX: (916) 255-3015 <br /> JAN 04 IT33 <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> 30 December 1992 <br /> Mr. Richard Laubacher <br /> BP Oil Compaty <br /> 4850 East 49t Street <br /> Cleveland, Ohio 44125-1079 <br /> ADDITIONAL SITE ASSESSMENT WORK PLAN, BP OIL COMPANY, STOCKTON FACILITY, SAN <br /> JOAQUIN COUNTY <br /> We have reviewed the 8 December 1992 work plan for additional assessment of <br /> soil and ground water contamination at your Stockton facility. Our comments <br /> are presented below. <br /> 1. Since the March 1989 report by Woodward Clyde was issued, several wells <br /> have been installed by Shell Oil Company and the United States Navy. <br /> Some of these wells are within 2,000 feet of BP Oil . <br /> 2. The report states in part that one soil sample for laboratory analysis <br /> will be collected from each boring. We recommend that soil samples be <br /> taken near the ground surface, every five feet, and at every <br /> stratigraphic change. Since ground water is expected at 13 feet below <br /> the ground surface, a maximum of three samples will be taken at each <br /> borehole. This sampling program will indicate if the contamination <br /> originated from the surface or was caused by fluctuation of contaminated <br /> around water. <br /> 3. The rationale was not provided for the selection of a 0.01-inch well <br /> screen slot and # 2/12 mesh sand pack. The well should not be pre- <br /> engineered but must be based on site-specific conditions. <br /> 4. Shell Oil Company also is conducting assessment work on the parcel <br /> between Shell and BP Oil . We recommend that you contact Mr. Charles B. <br /> Kolesar of Shell Oil Company at (800) 447-4355 ext. 3389, to avoid <br /> duplication of efforts. <br />