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J L ANALYTICAL SERVICES, . 217 Primo ,California 95358 * Offim MM 53W11 * FAX(M) Report# L2.2-14R02155 City of Riverbank Attn:Darin Smaller Report Date: 07/17/2009 6707 3rd Street Received Date: 07/07/2009 Riverbank, CA 95367 Work Order: 201101 Laboratory Number: 20110103 Description: Ground Water,MW#4,07/07/09,800 Analytical Results Method Minimum Detection Method Analysis Analysis Constituent Result Level Limit Reference Date Time Analyst Fixed Dissolved Solids 630 mg/l 20 '9.2 SM 2540E 07108/2009. 15:35 MH' Volatile Dissolved Solids 97 mg/l 20 9.2 SM 2540E 07106/2009'.'. 15:35MH pH 6.9 SU 0.5 0.2 SM 4500-H B 07/08/2009 08:30' NH r 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 251085 07/0712009 15:21 JA Nitrate Nitrogen 0.4 mg/I 0.1 0.014 EPA 300.0 07/07/2009 10:52 JA Totai Coliform(15-20 T LST) < 2 /100ml 2.0 2.0 SM 92218 07107/2009 11:45 AP QC Results Matrix Lab QC Units Blank Matrix Theoretical Matrix Spike Control Precision Accuracy Response Constituent Spike Spike Duplicate Spike %* % % Fixed Dissolved Solids mg/l` < 20 710 1500 2200 2200 1600 0.0 91.3 93.3 Volatile'Dissolved Solids mgt[ < 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/i < 1 < 1 28 25 25 25 2.7 88.8 89.0 Electrical Conductivity(E.C.) umho/cm < 1 1200 1400 2400 2400 1400 0.4 91.8 100.0 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) /100ml NA NA NA NA '' NA NA NA NA NA Notes At 25 degrees C Authorized By: 07/1712009 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.