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J L ANALYTICAL SERVICES, INC. 217 Primoy . Modesb,California Off 11 i FAX ) City of Riverbank Report# L2.2-141102287 Attn:Darin Smaller Report Date: 07/24/2009 6707 3rd Street Received Date: 07/0612009 Riverbank, CA 95367 Work Order: 201024 Laboratory Number: 20102404 Description: Ground Water,MW#5,07106109,920 Analytical Results Method Minimum Method Analysis Analysis Result Detection Analyst Constituent Level Limit Reference Date Time Fixed Dissolved Solids 790 mg/I 20 9.2 SM 2540E 07/08/2009 15:35 MH; Volatile Dissolved Solids 70 mg/1 20 9.2 SM 2540E 07/08/2009 15:35 MH pH 6.9 su 0.5 0.2 SM 4500-H B 07106/2009 08:35NH' Ammonical Nitrogen by Kjeldahl < 1 mg/1 1.0 0.8 SM 4500 NH3 C 07/14/2009 10:00 BAM Electrical Conductivity(E.C.) 1200 umho/cm 1.0 1.0 SM 251065 07/07/2009 14:13 JA Nitrate Nitrogen _ 0.3 mg/1 0.1 0.014 EPA 300.0 07/07/2009 10:43 JA Total Coliform(15-20 T LST) < 2 1100mi 2.0 2.0 SM 92218 07/07/2009 16:00 AP ' QC Results Matrix Lab Theoretical Matrix Spike Control Precision Accuracy Response QC Units Blank Matrix Constituent Spike Spike Duplicate Spike % % % Fixed Dissolved Solids mg/I' < 20 710 1500 2200 2200 ` 1600 ' 0.0 91.3 93.3 Volatile Dissolved Solids mg/1 < 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 1100 1400 2300 2300 1400 0.0 91.6 99.8 Nitrate Nitrogen mg/1_ < 0.1 < 0.1 0.9 0.9 0.9 0.9 0.2 99.8 95.8 Total Coliform(15-20 T LST) /100m1 NA NA NA NA NA NA NA NA NA Notes At 25 degrees C Authorized By: 07/24/2009 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.