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A6E2186 Ek6=6-K Lathrop ASSOCIATES BSK Associates Fresno Metals Quality Control Report Spike Source %REC RPD .. - Analyte Result RL Units Level Result %REC Limits RPD Limit Analyzed Qual EPA 6020-Quality Control Batch:A606481 Prepared:5/31/2016 Prep Method: EPA 3010A for STLC/DISTLC Analyst: MAS Blank Spike Dup(A606481-BSD1) Zinc,WET 7.2 2.5 mg/L 8.0 90 75-125 1 20 06/01/16 Duplicate(A606481-DUP1),Source:A6E2201-01 Antimony,WET ND 0.50 mg/L ND 20 06/01/16 Arsenic,WET 0.15 0.10 mg/L 0.12 18 20 06/01/16 Barium,WET 2.2 0.25 mg/L 2.1 1 20 06/01/16 Beryllium,WET ND 0.050 mg/L ND 20 06/01/16 Cadmium,WET ND 0.050 mg/L ND 20 06/01/16 Chromium,WET ND 0.50 mg/L ND 20 06/01/16 Cobalt,WET ND 2.5 mg/L ND 20 06/01/16 Copper,WET 0.57 0.50 mg/L 0.56 2 20 06/01116 Lead,WET 4.2 0.25 mg/L 3.4 19 20 06/01/16 Molybdenum,WET ND 0.50 mg/L ND 20 06/01/16 Nickel,WET ND 0.50 mg/L ND 20 06/01/16 Selenium,WET ND 0.10 mg/L ND 20 06/01/16 Silver,WET ND 0.50 mg/L ND 20 06/01/16 Thallium,WET ND 0.50 mg/L ND 20 06/01/16 Vanadium,WET ND 0.50 mg/L ND 20 06/01/16 Zinc,WET ND 2.5 mg/L ND 20 06/01/16 Matrix Spike(A606481-MS1),Source:A6E2201-01 Antimony,WET 8.4 0.50 mg/L 8.0 ND 104 75-125 06/01/16 Arsenic,WET 7.9 0.10 mg/L 8.0 0.12 97 75-125 06/01/16 Barium,WET 9.9 0.25 mg/L 8.0 2.1 97 75-125 06/01/16 Beryllium,WET 7.5 0.050 mg/L 8.0 ND 93 75-125 06/01/16 Cadmium,WET 7.7 0.050 mg/L 8.0 ND 96 75-125 06/01/16 Chromium,WET 7.8 0.50 mg/L 8.0 ND 97 75-125 06/01/16 Cobalt,WET 7.4 2.5 mg/L 8.0 ND 91 75-125 06/01/16 Copper,WET 7.3 0.50 mg/L 8.0 0.56 84 75-125 06/01/16 Lead,WET 11 0.25 mg/L 8.0 3.4 98 75-125 06/01/16 Molybdenum,WET 8.0 0.50 mg/L 8.0 ND 100 75-125 06/01/16 Nickel,WET 7.3 0.50 mg/L 8.0 ND 90 75-125 06/01/16 Selenium,WET 7.5 0.10 mg/L 8.0 ND 93 75-125 06/01/16 Silver,WET 3.7 0.50 mg/L 4.0 ND 92 75-125 06/01/16 Thallium,WET 7.2 0.50 mg/L 8.0 ND 90 75-125 06/01/16 Vanadium,WET 7.9 0.50 mg/L 8.0 ND 97 75-125 06/01/16 Zinc,WET 7.9 2.5 mg/L 8.0 ND 89 75-125 06/01/16 Matrix Spike(A606481-MS2),Source:A6E2186-06 Antimony,WET 8.2 0.50 mg/L 8.0 ND 102 75-125 06/01/16 Arsenic,WET 7.8 0.10 mg/L 8.0 0.10 96 75-125 06/01/16 Barium,WET 8.3 0.25 mg/L 8.0 ND 101 75-125 06/01/16 Beryllium,WET 7.8 0.050 mg/L 8.0 ND 97 75-125 06/01/16 Cadmium,WET 7.9 0.050 mg/L 8.0 ND 99 75-125 06/01/16 Chromium,WET 7.7 0.50 mg/L 8.0 ND 97 75-125 06/01/16 Cobalt,WET 7.5 2.5 mg/L 8.0 ND 94 75-125 06/01/16 A6E2186 FINAL 06272016 1817 Printed:6/27/2016 ***Amended Report '* QA-RP-0001-10 Final.rpt www.BSKAssociates.com Page 16 of 33