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Enviro — Chem, Inc. <br /> 1214 E. Lexington Avenue, Pomona, CA 91766 Tel (909) 590-5905 Fax (909) 590-5907 <br /> LABORATORY REPORT <br /> CUSTOMER: Worldwide Recovery/Systems <br /> 20539 Walnut Avenue, Walnut, CA 91789 <br /> Tel (909)597-2999 Fax(909)597-2995 <br /> PROJECT: PNP/Stockton <br /> MATRIX:SOLID DATE RECEIVED:11/15/10 <br /> SAMPLING DATE: DATE ANALYZED: 12/08-10/10 <br /> REPORT TOMS. LISA ULLOA DATE REPORTED:12/10/10 <br /> -----------------------------------------------------------' <br /> SAMPLE I.D. : Soil, Rock LAB I .D. : 101115-22 <br /> ---------------------------------------------------------------------- <br /> SOLUBLE THRESHOLD LIMIT CONCENTRATION (STLC) ANALYSIS <br /> UNIT: mg/L IN THE STLC LEACHATE <br /> ----------------------------- ----------------------------------------- <br /> ELEMENT <br /> -------------------------------------------------------------------- <br /> ELEMENT SAMPLE TTLC STLC EPA METHOD <br /> ANALYZED RESULT PQL DF LIMIT LIMIT USED <br /> Lead (Pb) 7. 18 *** 0. 05 1 1, 000 5 .0 6010B <br /> ----------------------------------------------------------------------- <br /> COMMENTS <br /> DF = Dilution Factor <br /> PQL = Practical Quantitation Limit <br /> Actual Detection Limit = PQL X DF <br /> TTLC = Total Threshold Limit Concentration <br /> STLC = Soluble Threshold Limit Concentration <br /> *** = The concentration exceeds the STLC Limit, and the sample is <br /> defined as hazardous waste as pe TITLE 22 (if marked) <br /> Data Reviewed and Approved by: ' <br /> CAL-DHS ELAP CERTIFICATE No. : 1555 <br />