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J L ANALYTICAL SERVICES, . 217 Pri Calitmia 95358 . O ( 111 - FAX( 6 City of Riverbank Report# L2.2-14R02155 Attn:Darin Smaller Report Date: 07/17/2009 6707 3rd Street Received Date: 07/07/2009 Riverbank, CA 95367 Work Order: 201101 Laboratory Number: 20110104 Description: Ground Water,MW#6,07/07/09,840 Analytical Results Minimum Method Method Analysis Analysis Result Detection Analyst Constituent Level Limit Reference Date Time Fixed Dissolved Solids 710 mg/l 20 9.2 SM 2540E 07/08/2009; 15:35 MH VolatileDissolved Solids 110 -mgti 20 9.2 SM 2540E 07/08/2009 15:35 MH' pH 7.2 SU 0.5 0.2 SM 4500-H B 07/08/2009; 08:30 NH Ammonical Nitrogen by Kjeldahl < 1 mgll 1.0 0.8 SM 4500 NH3 C 07114/2009 10:00 BAM Electrical Conductivity(E.C.) 1200 umho/cm 1.0 1.0 SM 251085 07/17/2009 12:05 JA Nitrate Nitrogen < 0.1 mgll 0.1 0.014 EPA 300.0 07/07/2009 10:52 JA Total Coliform(15-20 T LST) < 2 /100m1 20 2.0 SM 92216 07/0712009 11.46' AP QC Results Matrix Lab Theoretical Matrix S ike Control Py Response QC Units Blank Matrix Spike Spike Duplicate Spike recision Ac ourac o Constituent p p /o /o /o Fixed Dissolved Solids mg/l; < 20 710 1500 2200 2200 = 1600 00 91.3 93.3' Volatile Dissolved Solids mg/I' < 20 110 1500 1500 1500 1500 0.0 91.3 93.3 pH SU NA NA NA " NA NA ' NA NA NA NA Ammonical Nitrogen by Kjeldahl mg/l < 1 < 1 28 25 25 25 2.7 88.8 89.0 Electrical Conductivity(E.C.) umho/cm < 1 180 1400 1600 1600 1400 0.5 98.4 99.8 Nitrate Nitrogen mg/l < 0.1 < 0.1 0.9 0.9 0.9 0.9 1.0 98.5 99.1 Total Coliform(15-20 T LST) /100m1 NA!, NA NA NA NA NA'' NA NA NA' Notes At 25 degrees C Authorized By: 07/17/2009 Amos Snider ELAP Accreditation Laboratory Certificate#1203. These results relate only to the samples tested. This report shall not be reproduced except in full,without written approval of the laboratory.