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JCIVI DTmvT r. wmoiV1N1 iixv, I IV'-LV--01 a vIVVnia I vlwi.,vrn vn vim• „ .. .R <br /> 83 WEST MARCH LANE <br /> SUITE 12 <br /> STOCKTON,CA 95247 <br /> snPHONE:(209)478-1835 <br /> MMM October 25, 1991 <br /> Mr. George E. Donlou <br /> Pacific Energy <br /> 6055 East Washington Boulevard <br /> Eighth Floor <br /> Commerce, CA 90040 <br /> SUBJECT: Summary of Analytical TCLP Data and Comparison to Toxicity <br /> Characteristic Regulatory Levels <br /> Dear Mr. Donlou: <br /> Roy F. Weston, Inc. (WESTON) is pleased to submit this summary of analytical data and <br /> comparison to toxicity characteristic regulatory levels for the "Plant Condensate" sample <br /> collected at Pacific Energy's Stockton Landfill Power Station. As requested., WESTON has <br /> compared the results of the Toxicity Characteristic Leacheate Procedure (TCLP) analysis <br /> with both Federal and State regulatory levels as described below. The results reported for <br /> the Plant Condensate sample show that the concentration for no regulated substance exceeds <br /> the Federal or State levels for toxicity characteristics. <br /> The Federal Toxicity Characteristic Final Rule was promulgated by EPA in the Federal <br /> Register on March 29, 1990. The rule revised existing toxicity characteristics used by TEPA <br /> to identify hazardous waste to be regulated under Subtitle C of the Resource Conservation <br /> and Recovery Act (RCRA). The toxicity characteristic is one of four characteristics used <br /> by EPA to classify hazardous waste. A waste is hazardous if analysis of the TCLP extract <br /> contains concentrations greater than or equal to the levels listed for regulated substances. <br /> For TCLP analysis of a liquid waste containing less than 0.5%undissolved solids by weight, <br /> the method requires filtration of the waste through a 0.6 to 0.8 pa glass filter, The filtrate <br /> would be the TCLP extract. <br /> In the State of California, a waste is hazardous if the concentration for Persistent and <br /> Bioaccumulative Substances exceed Threshold Limit Concentrations as defined in Section <br /> 66699 of Title 22 of the California Code of Regulations (CCR). The Soluble Threshold <br /> Limit Concentration (STLC)is determined by performing the Waste Extraction Test(WET) <br /> in Section 66670 of Title 22. The WET method for liquid samples containing less than 0.5% <br /> undissolved solids by weight states that the sample will not be subject to the WET procedure <br /> and shall be analyzed directly for the substances listed in Section 66699. <br /> raaa+Tao>�,�vvp <br />