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University of California Soils publication, shows the soil types <br /> ' in the area. The Tracy Gas field is about 2 miles to south; it <br /> produces dry gas from sands of Upper Cretaceous age at depths of <br /> 4,000 to 5,000 feet. <br /> DEPTH TO GROUNDWATER: Water was not encountered at a depth of e <br /> feet during removal of the LUST, and is reported to be at about <br /> 10' bgl in the area. A review of semi-annual water table maps <br /> ' prepared by the County Flood Control District indicate that the <br /> water table has been as high as the surface in past years - the <br /> spring of 1983 in particular; Plate V is a portion of the San <br /> Joaquin County Flood Control District map showing lines of equal <br /> ' elevation. There are no water wells in the immediate area, and <br /> therefore good control is lacking. As mentioned earlier, crops <br /> are watered by open ditch, and domestic water is piped in. Plate <br /> ' VI shows the locations of control wells used for constructing the <br /> water level maps. <br /> Haled an investigative work done during this project, the water <br /> t table is estimated to be between b ' and 12 ' bgl ; (see Plate X. ) <br /> WATER QUALITY: Groundwater in this area is unsuited for domestic <br /> Muse or watering livestock due to the high concentrations of <br /> chlorides. Nitrates are <5mg/i , but boron is high, }2 mg/1 . <br /> Salt-tolerant crops such as alfalfa, tomatoes and beans can be <br /> grown, however. <br /> DETAILS OF WORK DONE COVERED BY THIS REPORTm <br /> ' TANK REMOVAL: <br /> On August 7, 1991 , Jim Thorpe Oil removed a 350 gallon UST which <br /> ' had contained leaded gasoline. The tank was empty at the time of <br /> removal . There are no records concerning when the tank was <br /> installed, or years it was in service, but it had not been used <br /> ' at least since November , 1966, when the Bank took possession of <br /> the property. <br /> The removed tank was in very poor condition, and there was <br /> ' visable contamination noted; refer to Exhibit B. A soil sample <br /> was taken from beneath the site of the tank at a depth of 8' by a <br /> Jim Thorpe Oil employee under the supervision of EHD personel , <br /> ' and transported under proper chain of custody, (see Exhibit C, ) <br /> to Weston Analytical for analysis. The sample was tested for <br /> HTEX, TPH-G, EDE, and total lead. The results of those tests are <br /> ' shown in Table I. There was no water or dampness observed in the <br /> bottom of the excavation at 8 feet. <br /> 2 <br /> 1 <br />