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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: Advanced GeoEnvironmental, Inc. <br />837 Shaw Road, Stockton, CA 95215 <br />Tel(209)467-1006 Fax(209)467-1118 <br />PROJECT: Global Materials Management <br />MATRIX:SOIL DATE RECEIVED:09/06/18 <br />DATE SAMPLED:08/31/18 DATE ANALYZED:09/15-17/18 <br />REPORT TO:MS. RENE TOTH DATE REPORTED:09/18/18 <br />---------------------------------------------------------------------- <br />SAMPLE I.D.: S12-2 LAB I.D.: 180906-20 <br />---------------------------------------------------------------------- <br />SOLUBLE THRESHOLD <br />UNIT: <br />------------------------ <br />ELEMENT SAMPLE <br />ANALYZED RESULT <br />Chromium (Cr) 0.260 <br />LIMIT CONCENTRATION (STLC) ANALYSIS <br />mg/L IN THE STLC LEACHATE <br />------------------------------------------- <br />TTLC STLC EPA METHOD <br />PQL DF LIMIT LIMIT USED <br />0.05 1 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 />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 peerJ/b9AL-TITLE 22 (if marked) <br />Data Reviewed and Approved by: /1" <br />CAL -DHS ELAP CERTIFICATE No.: 1555 <br />