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Enviro — Chem, Inc. <br />1214 E. Lexington Avenue, Pomona, CA 91766 Tel (909) 590-5905 Fax (909) 590-5907 <br />METHOD BLANK REPORT <br />CUSTOMER: Advanced GeoEnvironmental, Inc. <br />837 Shaw Road, Stockton, CA 95215 <br />Tel(209)467-1006 E -Mail: BMillman@advgeoenv.com <br />PROJECT: Global Materials Management <br />MATRIX:SOIL DATE RECEIVED:12/12/18 <br />DATE SAMPLED:12/11/18 DATE ANALYZED:12/22-24/18 <br />REPORT TO:MR. BRIAN MILLMAN DATE REPORTED:12/24/18 <br />-------------------------------------- <br />METHOD BLANK FOR LAB I.D.: 181212-4 <br />SOLUBLE THRESHOLD LIMIT CONCENTRATION (STLC) ANALYSIS <br />UNIT: mg/L IN THE STLC LEACHATE <br />ELEMENT SAMPLE TTLC STLC EPA METHOD <br />ANALYZED RESULT PQL DF LIMIT LIMIT USED <br />Chromium (Cr) ND 0.05 2,500 560/5.0@ 6010B <br />COMMENTS <br />DF Dilution Factor <br />PQL = Practical Quantitation Limit <br />Actual Detection Limit = PQL X DF <br />ND = Below the actual detection limit or non-detected <br />TTLC = Total Threshold Limit Concentration <br />STLC = Soluble Threshold Limit Concentration <br />@ = Must meet the TCLP limit/chromium (5.0 mg/L in TCLP leachate) <br />** = TCLP Chromium/TTLC-Chromium VI recommended (if marked) <br />*** = The concentration exceeds the STLC Limit, and the sample is <br />defined as hazardous waste as per L -TITLE 22 (if marked) <br />pp Y <br />Data Reviewed and Approved b : <br />0 <br />CAL -DHS ELAP CERTIFICATE No.: 1555 <br />