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7r=V5L Laboratories Inc. , Environmental Testing Laboratory Since 1949 Enviro Tech Consultants, Inc. Reported: 05/01/2018 17:50 5400 Rosedale Highway Project: Misc.Samples Bakersfield,CA 93308 Project Number: COL 103 Soil Sample Project Manager: Kelsey Padilla Metals Analysis Quality Control Report - Precision & Accuracy Control Limits Source Source Spike Percent Percent Lab Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals QC Batch ID: B012123 Used client sample: N Total Antimony DUP 1813205-07 ND ND ug/L 20 MS 1813205-07 ND 416.79 400.00 ug/L 104 75-125 MSD 1813205-07 ND 425.43 400.00 ug/L 2.1 106 20 75-125 Total Arsenic DUP 1813205-07 ND ND ug/L 20 MS 1813205-07 ND 184.81 200.00 ug/L 92.4 75-125 MSD 1813205-07 ND 180.18 200.00 ug/L 2.5 90.1 20 75-125 Total Barium DUP 1813205-07 76.486 77.751 ug/L 1.6 20 MS 1813205-07 76.486 515.03 400.00 ug/L 110 75-125 MSD 1813205-07 76.486 508.59 400.00 ug/L 1.3 108 20 75-125 Total Beryllium DUP 1813205-07 ND ND ug/L 20 MS 1813205-07 ND 201.45 200.00 ug/L 101 75-125 MSD 1813205-07 ND 199.72 200.00 ug/L 0.9 99.9 20 75-125 Total Cadmium DUP 1813205-07 ND ND ug/L 20 MS 1813205-07 ND 197.69 200.00 ug/L 98.8 75-125 MSD 1813205-07 ND 202.24 200.00 ug/L 2.3 101 20 75-125 Total Chromium DUP 1813205-07 2.3704 1.9663 ug/L 18.6 20 J MS 1813205-07 2.3704 198.48 200.00 ug/L 98.1 75-125 MSD 1813205-07 2.3704 203.80 200.00 ug/L 2.6 101 20 75-125 Total Cobalt DUP 1813205-07 ND 1.3278 ug/L 20 J MS 1813205-07 ND 209.05 200.00 ug/L 105 75-125 MSD 1813205-07 ND 213.31 200.00 ug/L 2.0 107 20 75-125 Total Copper DUP 1813205-07 1.3394 1.7058 ug/L 24.1 20 J,A02 MS 1813205-07 1.3394 379.49 400.00 ug/L 94.5 75-125 MSD 1813205-07 1.3394 386.92 400.00 ug/L 1.9 96.4 20 75-125 Total Lead DUP 1813205-07 ND ND ug/L 20 MS 1813205-07 ND 409.31 400.00 ug/L 102 75-125 MSD 1813205-07 ND 419.20 400.00 ug/L 2.4 105 20 75-125 Total Molybdenum DUP 1813205-07 1.8070 1.6704 ug/L 7.9 20 J MS 1813205-07 1.8070 210.62 200.00 ug/L 104 75-125 MSD 1813205-07 1.8070 215.45 200.00 ug/L 2.3 107 20 75-125 Total Nickel DUP 1813205-07 7.0809 6.9037 ug/L 2.5 20 J MS 1813205-07 7.0809 411.53 400.00 ug/L 101 75-125 MSD 1813205-07 7.0809 412.60 400.00 ug/L 0.3 101 20 75-125 Total Selenium DUP 1813205-07 ND ND ug/L 20 MS 1813205-07 ND 184.81 200.00 ug/L 92.4 75-125 MSD 1813205-07 ND 190.66 200.00 ug/L 3.1 95.3 20 75-125 Total Silver DUP 1813205-07 ND ND ug/L 20 MS 1813205-07 ND 95.568 100.00 ug/L 95.6 75-125 MSD 1813205-07 ND 96.612 100.00 ug/L 1.1 96.6 20 75-125 The results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. BC Laboratories,Inc.assumes no responsibility for report alteration,separation,detachment or third party interpretation. Report ID: 1000738993 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bclabs.com Page 9 of 14