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' <br /> Laboratories, Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Ground Zero Analysis,Inc. Reported: 10/05/2015 15:05 <br /> ' 1172 Kansas Avenue Project: City of Escalon,Monitoring Wells <br /> Modesto,CA 95351 Project Number: 5894 <br /> Project Manager: Project Manager <br /> ' Volatile Organic Analysis (EPA Method 826013, 8010 List) <br /> Quality Control Report - Precision & Accuracy <br /> ' Control Limits <br /> Source Source Spike Percent Percent Lab <br /> Constituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Lluals <br /> QC Batch ID: BYI2371 Used client sample: Y-Description: MW-7, 09/17/2015 10:46 <br /> Toluene-d8(Surrogate) MS 1523812-02 ND 9.9400 10.000 uglL 99.4 80-120 <br /> MSD 1523812-02 ND 9.9000 10.000 ug/L 0.4 99.0 60-120 <br /> 4-11romo8uorolomene(Surrogate) MS 1523812-02 ND 9.8000 10.000 uglL 98.0 80-120 <br /> ' MSD 1523812-02 ND 9.8200 10,000 ug/L 0.2 982 __ 80-120 <br /> 1 <br /> 1 <br /> 1 <br /> ' The resuhs 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 /> All faults limed in this report ore far the exdawv use ofth<submining Derry. BC Laboratones,Inc.ansurres no responsibility for report alteration,separation,detachment or third perry in crpretotion. <br /> Report ID: 1000403978 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bclabs.com Page 22 of 29 <br />