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TREADWELL & ROLLO <br /> o total volatile hydrocarbons (EPA 8015 modified) <br /> o total extractable hydrocarbons (EPA 8015 modified) <br /> o total oil and grease (SMWW 5520) <br /> o chlorinated herbicides (EPA 8150) <br /> o carbamates and urea pesticides (EPA 8320) <br /> 0 organophosphorus pesticides (EPA 8140) <br /> 0 organochlorine pesticides (EPA 8240) <br /> o Title 26 metals (EPA 6010, 7060, 7420, 7470, 7841) <br /> o cyanide (EPA 335.2). <br /> The confirmation samples obtained on 17 September 1991 were analyzed on a 24-hour <br /> turnaround basis for total extractable hydrocarbons (EPA 8015 modified). <br /> Detection limits and a specific compound listing for each analysis are included on the <br /> laboratory reports presented in Appendix B. <br /> 4.6 Quality Control <br /> A minimum of one quality control sample was submitted daily to the laboratory to check <br /> for accuracy, precision, and possible contamination from either field and/or laboratory <br /> procedures. Overall, two duplicate samples and one trip blank were submitted for <br /> analytical testing. A duplicate and a field blank from the initial round of sampling on 23 <br /> August 1991 were tested for volatile organic compounds and one duplicate sample from <br /> the 17 September 1991 sampling was analyzed for total extractable hydrocarbons. The <br /> correlation between duplicate samples was satisfactory and only a trace laboratory <br /> contaminant (acetone) was detected in the trip blank; consequently, the analytical results <br /> were judged to be representative of field conditions. <br /> 7 <br /> 1107A201.CRJ 5 November 1991 <br />