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Mr. Charles Whitworth Kennedy/Jenks/Chilton <br /> Cal-Farm Supply <br /> 14 July 1989 <br /> Page 5 <br /> I <br /> o Organophosphorus pesticides: Determined by EPA method 8140 using a <br /> hexane/acetone extraction for soil . The resultant extract was <br /> analyzed with a capillary column and a phosphorous detector. <br /> o Organochlorine pesticides: Determined by EPA method 8080 using a <br /> hexane/acetone extraction for soil followed by gas chromatography <br /> (GC) analysis using a capillary column with an electron capture <br /> Y� detector. <br /> o Triazine pesticides: Determined by EPA method 619 using a <br /> hexane/acetone extraction for soil . The resultant extract was <br /> analyzed with a capillary column and nitrogen detector. <br /> o Chlorinated herbicides: Determined by EPA method 8150 using <br /> acetone/ether extract, followed by base hydrolysis, followed by an <br /> ether wash. The resultant extract was acidified, followed by an <br /> additional ether extraction, followed by esterification using diazo- <br /> methane, followed by a florlsil cleanup. The resultant final extract <br /> was analyzed by gas chromatography (GC) with a capillary column and <br /> an electron capture detector. <br /> o Nitrates: Determined by EPA method 352.1. Nitrate is extracted from <br /> soil using boiled millipore water followed by colorimetric analysis <br /> using brucine sulfate. Results are reported as nitrogen <br /> t <br /> Two soil samples (SS-11 and SS-12) and the two wipe samples were analyzed for <br /> dioxin using the following procedure. <br /> 0 2,3,7,8-dioxin isomer: Determined by EPA method 8280 using toluene <br /> extraction, followed by low resolution mass spectrometry. <br /> Selected soil samples from each boring, groundwater samples from each <br /> monitoring well , and a reconnaissance groundwater sample from boring 8-2 were <br /> analyzed for the following constituents using the described methods- <br /> 0 Total Petroleum Hydrocarbons (TPH) : Analysis performed on a hexane <br /> extract by gas chromatography with a flame-ionization detector using <br /> commercial hydrocarbons (gasoline and diesel) as standards. <br /> o Purgeable aromatic constituents benzene, xylene, toluene, and <br /> ethylbenzene (BXTE) : Analysis performed by EPA method 8020 using gas <br /> chromatography methods (GC) . <br /> o Nitrates. Determine by EPA method 352.1 by colorimetric analysis <br /> using brucine sulfate. Results are reported as nitrogen. <br /> i <br />