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pRTUNQR T"© Q CERTIFICATE OFANALYSIS Analytical Laboratory (D 3935 N.Coronado Ave,Stockton CA.95204 Phone:(269)477-8195 UniFirst Corporation Project Number: UFC 819 N.Hunter Street Project Name: Effluent(1 per Week&2 per Week) Work Order No.: Stockton,CA 95205 Project Manager: William Geary Conventional Chemistry Parameters by APHA/EPA Methods Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes (2011303-01)Automatic 24 hrs Composite Sampler Sample Type-Composite Sampled Begin:12-Jan-22 11:00 Sampled End: 13-Jan-22 11:00 Received:13-Jan-22 11:00 @Temp:5 Celsius Biochemical Oxygen Demand 510 2.0 mg/L 1 AA21310 13-Jan-22 13-Jan-22 SM 5210 B Total Suspended Solids(TSS) 90 1.0 " " AA21707 17-Jan-22 17-Jan-22 SM 2540 D (2011303-02)Final Effluent at Discharge Flume Sample Type-Grab Sampled Begin: 13-Jan-22 11:00 Sampled End: 13-Jan-22 11:00 Received:13-Jan-22 11:00 @Temp:5 Celsius Oil&Grease(HEM) 54 3.0 mg/L 1 AA21408 14-Jan-22 14-Jan-22 EPA1664A Non-Polar Material(SGT-HEM) 13 3.0 " " " " " " (2011904-01)Automatic 24 hrs Composite Sampler Sample Type-Composite Sampled Begin: 18-Jan-2211:00 Sampled End:19-Jan-22 11:00 Received:19-Jan-22 11:00 @Temp:5 Celsius Biochemical Oxygen Demand 450 2.0 mg/L 1 AA21908 19-Jan-22 19-Jan-22 SM 5210 B Total Suspended Solids(TSS) 80 1.0 " " AA21910 19-Jan-22 19-Jan-22 SM 2540 D (2011904-02)Final Effluent at Discharge Flume Sample Type-Grab Sampled Begin: 19-Jan-22 11:00 Sampled End: 19-Jan-22 11:00 Received:19-Jan-22 11:00 @Temp:5 Celsius Oil&Grease(HEM) 53 3.0 mg/L 1 AA22014 20-Jan-22 20-Jan-22 EPA1664A Non-Polar Material(SGT-HEM) 12 3.0 " " " " 11 " (2012103-01)Automatic 24 hrs Composite Sampler Sample Type-Composite Sampled Begin:20-Jan-22 11:00 Sampled End:21-Jan-22 11:00 Received:21-Jan-22 11:00 @Temp:5 Celsius Biochemical Oxygen Demand 340 2.0 mg/L 1 AA22113 21-Jan-22 21-Jan-22 SM 5210 B Total Suspended Solids(TSS) 44 1.0 " " AA22112 21-Jan-22 21-Jan-22 SM 2540 D (2012503-01)Final Eff.Auto 24hrs Comp.Sampler Sample Type-Composite Sampled Begin:24-Jan-22 11:00 Sampled End:25-Jan-22 11:00 Received:25-Jan-22 11:43 @Temp:5 Celsius Biochemical Oxygen Demand 330 2.0 mg/L 1 AA22606 26-Jan-22 26-Jan-22 SM 5210 B Total Suspended Solids(TSS) 32 1.0 " " AA22511 25-Jan-22 25-Jan-22 SM 2540 D (2012706-01)Final Eff.Auto.24hrs Comp.Sampler Sample Type-Composite Sampled Begin:26-Jan-22 10:30 Sampled End:27-Jan-22 10:30 Received:27-Jan-22 11:22 @Temp:5 Celsius Biochemical Oxygen Demand 300 2.0 mg/L 1 AA22719 27-Jan-22 27-Jan-22 SM 5210 B Total Suspended Solids(TSS) 36 1.0 " " AA22718 27-Jan-22 27-Jan-22 SM 2540 D (2012706-02)Final Effluent at Discharge Flume Sample Type-Grab Sampled Begin:27-Jan-22 11:00 Sampled End:27-Jan-22 11:00 Received:27-Jan-22 11:22 @Temp:5 Celsius Methylene Blue Active Substances 4.19 0.100 mg/L 1 AA22725 27-Jan-22 27-Jan-22 SM 5540 C (MBAS) Oil&Grease(HEM) 49 3.0 AA22720 27-Jan-22 27-Jan-22 EPA1664A Non-Polar Material(SGT-HEM) 12 3.0 " (�Z/.Iilf� Approved By Precision Enviro-Tech. — California D.O.H.S.Cert.#2387 Page 4 of 21