Laserfiche WebLink
2059 Navy, Stockton <br /> Page.2 <br /> TPH-d contamination. Further investigation to determine the vertical and lateral <br /> extent of soil and groundwater contamination must be conducted and the <br /> necessity of remedial action evaluated. <br /> Soil contamination was documented at 13.5 feet bgs at the time of the UST <br /> system removal in 1995 so collection and analysis of soil samples below this <br /> depth must be performed to investigate the vertical extent of the soil <br /> contamination. Since depth to groundwater is shallow and the grab groundwater <br /> sample collected on 20 February 2004 had TPH-d contamination, a groundwater <br /> investigation is required. <br /> In addition since the grab water sample indicates that groundwater has been <br /> contaminated a sensitive receptor survey, identifying wells within a 2000 foot <br /> radius of the site, must be conducted. Contact the Department of Water <br /> Resources and search the area to-locate the wells. Submit the result of the <br /> survey, which includes a map showing the location of the identified wells, the <br /> addresses where the wells are located and any known construction details of the <br /> wells to EHD. <br /> By 14 March 2005, please submit a work plan to define the vertical and Lateral <br /> extent of soil and groundwater contamination caused by the unauthorized <br /> release, and the sensitive receptor survey. <br /> If you have any further questions regarding this matter, contact Harlin Knoll at <br /> (209) 468-3442. <br /> Donna Heran, RENS, Director <br /> Environmental Health Department <br /> Harlin Knoll, Senior REHS Margare agodo, RE S <br /> LOP/Site Mitigation Unit IV Supervisor <br /> cc: CVRWQCB — Jim Barton . <br /> cc: SWRCB, Cleanup Fund <br /> cc: H2OGEOL <br /> cc: Ron Barber <br />