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i <br /> Kennedy/Jenks/Chefton <br /> � Mr. Charles Whitworth <br /> Cal-Farm Supply <br /> -� 14 July 2989 <br /> Page 9 <br /> Surface Soil and Wine Samples <br /> Nitrates: Concentrations of nitrate at a level recorded in the Roy F. Weston, <br /> Inc. report or at a higher range indicative of a source area were not found in <br /> soils in the storage yard. Only low concentrations of nitrates were detected <br /> in surface soil samples collected from the storage yard within the fenced <br /> boundary. Nitrate concentrations ranged from a low of 3.2 mg/Kg as nitrogen <br /> in sample SS-13 to a high of 30 mg/Kg as nitrogen in sample SS-11. <br /> Organochlorine pesticides: Seven of the 20 organochlorine pesticides included <br /> r in the analyses were detected in surface soils collected from the storage <br /> yard. Organochlorine pesticides were not detected in surface wipe samples <br /> collected from the floor of the warehouse building. The concentrations of <br /> this class of pesticides which were detected are provided in Table 6. DDT <br /> concentrations exceeding its TTLC value were recorded for several samples. <br /> One sample contained Endosulfan I above the soil criteria calculated using the <br /> oral rate LO a. The range of concentrations of the organochlorine pesticides <br /> that were detected are listed below <br /> Compound Range of Concentrations <br /> Detected (ug/Kg) <br /> Alpha BHC <12.5 to 100 <br /> Endosulfan I <12.5 to 1,200 <br /> Endosulfan II <12.5 to 310 <br /> 4,4' - DUE 32 to 39,000 <br /> 4,4' - DUD 67 to 60,000 <br /> I 4,4' - DDT 96 to 190,000 <br /> Methoxychlor 25 to 1,900 <br /> The high concentration of pesticides in the extract from some of the samples <br /> required dilution of the extract as per EPA laboratory protocol This <br /> J resulted in higher detection limits for the other compounds analyzed in the <br /> extract <br /> Triazine Pesticides: The surface soils and wipe samples were analyzed for <br /> nine triazine pesticides. Of these, only three were detected. Simazlne was <br /> detected at a concentration of 51 ug/Kg in soil sample SS-4, atrazine was <br /> detected in soil sample SS-6 at a concentration of 6.1 ug/Kg, and propazine <br /> -- was detected at a concentration of 0 1 ug/100cm2 in the wipe sample WS-1. The <br /> other triazine pesticides were not detected above the method detection limits <br /> in the surface soils or wipe sample analyzed. Concentrations of triazene <br /> pesticides detected were well below the calculated soil criteria. <br /> j <br />