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I <br />n <br />I � <br />1 <br />u <br />• Volatile organic compounds using U.S. Environmental <br />Protection Agency (EPA) Method 8240 <br />• Semivolatile organic compounds using EPA Method 8270 <br />• Chlorinated pesticides and polychlorinated biphenyls <br />(PCBs) using EPA Method 8080 <br />• ICP metals, filtered (26 metals including all priority <br />pollutant metals, except mercury) using EPA Method 6010 <br />• Arsenic, selenium, and mercury using atomic absorption <br />according to the EPA 7000 series methods <br />Standard physical and chemical analyses will be used to test for the <br />following: <br />• Chemical oxygen demand <br />• Total dissolved solids <br />Chloride <br />• Sulfate <br />• Nitrate -nitrogen <br />Phosphate <br />• Alkalinity <br />Total Kjeldahl nitrogen <br />• pH (field test) <br />• Temperature (field test) <br />• Electrical conductivity <br />Procedures and techniques for sample collection, preservation, and <br />shipment, chain -of -custody control, and chemical analyses are present- <br />ed in Appendix B. <br />Following completion of the SWAT sampling event, background water <br />quality will be determined as discussed in Section III.D. Quarterly <br />13 <br />cmirnn <br />