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900003OAll CON-!!- <br /> A <br /> ON-11A composite soil sample was collected from the bottom of the pond <br /> excavation by BSK & Associates in 1989. The sample was analyzed for <br /> organochlorine pesticides and polychlorinated biphenyls (PCBs) by EPA <br /> Method 8080, and for soluble concentrations of selected metals. Organo- <br /> chlorine pesticides and PCBs were not detected in the sample. Soluble <br /> metals concentrations were below the STLC. <br /> According to California Department of Water Resources Bulletin 230-81 <br /> (1985) (DWR 1981) , the depth to groundwater is about 25 feet in this <br /> area. This estimate is consistent with estimates provided by personnel at <br /> the San Joaquin County Department of Environmental Health. Process water <br /> used at the site is obtained from an onsite well . Water is pumped from the <br /> well into a 500-gallon holding tank. The well was installed in 1970. <br /> According to facility records, the well is 120 feet deep. During drilling, <br /> water was first encountered at 60 feet and the static water level (measured <br /> in 1970) was 45 below grade. The well is tested annually for metals and <br /> minerals. According to Mr. Bill Jensen, no water quality problems have <br /> been noted. Bottled water is used for drinking water at the site. <br /> Sewage is disposed of by means of a septic system, consisting of a <br /> holding tank and leach lines. The holding tank is cleaned out every 6 <br /> months and the contents disposed of at a sewage disposal facility. <br /> Most fertilizer application equipment is rinsed in the field. Fertil- <br /> izer equipment and tanks are occasionally rinsed on the fertilizer rinse- <br /> water pad located near the northern boundary of the facility. The rinse- <br /> water pad was reportedly constructed in 1970. Rinsewater is collected in a <br /> sump and pumped into one of two fertilizer rinsewater storage tanks. The <br /> sump and recovery system was reportedly constructed in 1981. The rinse- <br /> water is reapplied in the field. Residual solids are removed from the sump <br /> and placed in a bin for disposal at the Kettleman Hills Class I landfill . <br /> 2-4 <br />