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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 I and II 10/15/20 15:17 <br />TCLP Chlorinated Herbicides by EPA Method 8151A - Quality Control <br />Reporting Spike Source %REC RPD <br />Analyte(s) Result Limit Units Level Result %REC Limits RPD Limit Flag <br />Batch AJ03470 - Herbicides <br />Blank (AJ03470-BLKI) <br />2,4-D ND 10 mg/L <br />2,4,5-TP (Silvex) ND 1.0 mg/L <br />Prepared: 10/08/20 Analyzed: 10/13/20 <br /> <br />Surrogate: DCAA 0.0227 mg/L 0.0218 104 54-124 <br /> <br />Matrix Spike (AJ03470-MS1) <br /> Source: 20J0896-01 Prepared: 10/08/20 Analyzed: 10/13/20 <br /> <br />2,4-D 0.0106 10 mg/L 0.00960 ND 111 48-135 <br />2,4,5-TP (Silvex) 0.00158 1.0 mg/L 0.00160 ND 98.6 43-133 <br /> <br />Surrogate: DCAA 0.0223 mg/L 0.0218 102 54-124 <br /> <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 20 of 23