Laserfiche WebLink
GRANITE CONSTRUCTION — FRENCH CAMP Page 3 <br /> WKA No. 2088 . 09 <br /> October 10, 2005 <br /> (bgs) and a flow direction generally to the northwest. A historical summary of the groundwater <br /> elevations obtained from the monitoring wells is summarized in Table 1 . <br /> Review of available information and telephone interviews with the California Department of <br /> Water Resources (DWR) and San Joaquin County Flood Control District personnel indicate that <br /> there are no municipal or irrigation wells located within a 2,000400t radius of the site. The <br /> nearest irrigation well (DWR # 12P01) is located approximately 2,600 feet southeast from the <br /> site. However, two industrial supply wells are located on the site and are owned by Granite <br /> Construction Company. According to Mr. Essick (Granite Construction Company), no records <br /> of well driller logs have been discovered in archived files. Mr. Essick indicated that the water <br /> produced by these supply wells is not used for drinking water by Granite personnel. Mr. Jay <br /> Patel of the DWR indicated that there are no records of the two industrial supply wells located on <br /> the site. <br /> Summary of Subsurface Soil and Groundwater Investigation <br /> On April 22, 1992 five underground storage tanks (USTS) consisting of one waste oil (500 <br /> gallons), two diesel USTS (12,000- and 20,000-gallons), and two unleaded gasoline USTs (both <br /> 10,000-gallons) and associated dispenser island and underground piping were removed from the <br /> site by Aronson Engineering of Rancho Cordova, California. The USTS, dispenser island and <br /> piping were removed under permit and inspection of SJCEHD. Petroleum hydrocarbons were <br /> reported in soil samples obtained beneath the former USTS and dispenser islands. Soil generated <br /> during tank removal activities was stockpiled on and covered with plastic. The USTS were <br /> transported to Erickson, Inc. of Richmond, California for disposal. <br /> Soil samples were obtained beneath the former USTS and product line piping by personnel from <br /> WKA. Minor concentrations of Total Petroleum Hydrocarbons (TPH) as diesel (10 mg/kg) and <br /> elevated concentrations of TPH as gasoline (ranging from 270 to 5 ,900 mg/kg were reported in <br /> laboratory analysis of samples obtained beneath the diesel and unleaded gasoline USTS. <br /> Petroleum hydrocarbons were not reported in samples obtained beneath the former UST product <br /> lines. TPH as gasoline (130 mg/kg) and diesel (15,000 mg/kg) were reported in the soil sample <br /> N <br /> WALLAU • Korn <br /> 4ns504:aArE5 INC, <br />