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Project No. 8753009Q-nNO2 • <br /> Woodward-Clyde Consultants <br /> REGULATORY AGENCY SURVEY <br /> Federal, state, county, and city agencies were contacted to obtain informa- <br /> tion on site hydrogeology, identify existing piezometers and/or monitoring <br /> wells near the site, obtain well boring logs for on-site wells, identify the <br /> lead regulatory agency with primary jurisdiction over underground tanks <br /> and hazardous materials incidents, and to review past incidents in the <br /> terminal area (spills, leaks, or other significant events). Agencies con- <br /> tacted included: California State Department of Health Services-Sacramento, <br /> Regional Water Quality Control Board - San Joaquin County, San Joaquin <br /> Local Health District - Environmental Division (SJLHD), State Department <br /> of Water Resources, U.S. Army Corps of Engineers, San Joaquin County <br /> Flood Control District, and Stockton Fire Department. <br /> Site Hydrogeology <br /> A summary of existing documented wells is listed in Table 1 and approxi- <br /> mate locations are shown on Figure 1. The only wells apparently located <br /> on-site are five monitoring/recovery wells installed in 1981 by Time Oil <br /> Company to, monitor a gasoline spill and a single water supply well (orig- <br /> inally part of a fire protection system) located at the Tesoro/Beacon Oil <br /> terminal. Additional off-site wells were identified by various agencies. <br /> Well Number 11 is located approximately 3/4 miles to the southeast of the <br /> site. It is an industrial supply well with a diameter of 10 inches, pene- <br /> trating a total depth of 270 feet. All other wells are located outside of a <br /> 1-mile radius from the site. <br /> Boring logs were not available for the monitoring wells installed by Time <br /> Oil Company. However, geotechnical boring logs (prepared by. J. H. <br /> Kleinfelder & Associates in 1984) provided by ST Services and Time Oil <br /> Company are included in Appendix A. Soils encountered during the <br /> geotechnical investigations were described as lean clays and silts with <br /> occasional sandy interbeds. The clays and silts were described as stiff to <br /> medium stiff. Groundwater in three borings was encountered at depths <br /> i <br /> i <br /> -3- <br /> R1 AlKS X <br />