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Alpha Analytical Laboratories, Inc. email: clientservices©alpha-labs.com <br />Corporate: 208 Mason Street I Ukiah, CA 95482 I T: 707-468-0401 I F: 707-468-5267 I ELAP# 1551 <br />Shimmick Construction Project Manager: Hagr Balla <br />8201 Edgewater Dr., Suite 202 Project: Smith Canal Reported: <br />Oakland, CA 94621 Project Number: CCR 66261.24 Tables land II 10/15/20 15:17 <br />TCLP Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Analyte(s) Result <br />Reporting <br />Limit Units <br />Spike <br />Level <br />Source <br />Result %REC <br />%REC <br />Limits RPD <br />RPD <br />Limit Flag <br />Batch AJ03147 - ZHE GCMS <br />Matrix Spike Dup (AJ03147-MSD1) Source: 2013191-01 Prepared: 10/01/20 Analyzed: 10/02/20 <br />Benzene 0.0222 0.50 mg/L 0.0200 ND 1 I 1 58-139 1.87 25 <br />Carbon tetrachloride 0.0252 0.50 mg/L 0.0200 ND 126 65-153 3.06 25 <br />Chlorobenzene 0.0234 100 mg/L 0.0200 ND 117 58-137 2.20 25 <br />Chloroform 0.0234 6.0 mg/L 0.0200 ND Ill 68-121 2.16 25 <br />1,4-Dichlorobenzene 0.0223 7.5 mg/L 0.0200 ND 111 41-142 1.90 25 <br />1,2-Dichloroethane 0.0202 0.50 mg/L 0.0200 ND 101 58-133 2.66 25 <br />1,1-Dichloroethene 0.0234 0.70 mg/L 0.0200 ND 117 70-154 1.16 25 <br />Methyl ethyl ketone 0.0420 200 mg/L 0.0400 ND 105 62-126 4.71 25 <br />Tetrachloroethene 0.0252 0.70 mg/L 0.0200 ND 126 49-148 2.49 25 <br />Trichloroethene 0.0239 0.50 mg/L 0.0200 ND 120 58-140 3.44 25 <br />Vinyl chloride 0.0257 0.20 mg/L 0.0200 ND 128 53-160 6.31 25 <br />Surrogate: Bromofluorobenzene 0.0282 mg/L 0.0250 113 70-130 <br />Surrogate: Dibromofluoromethane 0.0236 mg/L 0.0250 94.6 70430 <br />Surrogate: Toluene-d8 0.0258 mg/L 0.0250 103 70-130 <br />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. <br />Page 18 of 23