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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 /> ' Water Analysis (General Chemistry) <br /> Quality Control Report - Laboratory Control Sample <br /> ' Control Limits <br /> Spike Percent Percent Lab <br /> Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals <br /> QC Batch ID: BY11878 <br /> ' Chloride _.. _ - BYI1878-BS1 LCS 49.800 50.000 mg/L 99_6 90-110 <br /> Nitrate as N BY11878-BS1 LCS 4.9520 5.0000 mg/L 99.0 90-110 <br /> Sulfate BY11878-BSI LCS 99.224 100.00 mg/L 99.2 90-110 <br /> QC Batch ID: 13YI1907 <br /> Total Dissolved Solids @ 180 C BYI1907-851 LCS 570.00 586.00 mg/L 97.3 90-110 <br /> ' QC Batch ID: BYI1946 <br /> Total Alkalinity as CaCO3 13YI1946-BS3 LCS 104.97 100.00 mg/L 105 90-110 <br /> QC Batch ID: BY12014 <br /> Dissolved Calcium_ _ BY12014-BSI LCS 9.7971 10.000 mglL 98.0 85-115 <br /> Dissolved Magnesium BY12014-BS1 LCS 9.0453 10.000 r lL 90.5 85-115 <br /> Dissolved Sodium BY12014-BS1 LCS 8.8200 10.000 mg/L 68.2 85-115 <br /> — __ <br /> Dissolved Potassium BYI2014-BS1 LCS 8.7180 10.000 mg/L 87.2 85-115 <br /> QC Batch ID: BY12238 <br /> ' Biochemical Oxygen Demand-Seeded BY12238-BSI LCS 185.67 198.00 mg/L 93.8 85-115 <br /> ' The resrde,in this report apply to the samples analyzed in accordance with the chain olcustody document.This analytical report must be reproduced in its enlireN. <br /> All results listed in this repon artfor the exclusive use ofthe submitting party. BC Labomtodes,re.assumes no responsibility for report alrootlon,sepuanon,detachment or third perry interpretation. <br /> Report ID: 1000403978 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 w bclabs.com Page 24 of 29 <br />