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May 20, 2003 Lab ID STK331687 <br /> Lodi Grading & Paving, Inc. Customer : 3-14883 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> MBAs (foaming agents) 5540C 04/01/2003:T218 MS mg/L 0.1000 100% 90-110 <br /> (STK331687-01) MSD mg/L 0.1000 100% 90-110 <br /> MSRPD mg/L 0.00 2_0.100 <br /> 5540C 04101/2003:T 00-CCB mg/L ND <0.1 <br /> 00-CCV mg/L 0.1000 100% 99-101 <br /> Nitrate 300.0 04/21/2003:A215 MS mg/L 400.0 106% 94-111 <br /> (VI 340580-03) MSD mg/L 400.0 106% 94-I11 <br /> MSRPD mg/L 0.2% 52.71 <br /> 300.0 04/21/2003:A 01-CCB mg/L ND <0.4 <br /> 01-CCV mg/L 20.00 101% 90-110 <br /> 02-CCB mg/L ND <0.4 <br /> 02-CCV mg/L 20.00 103% 90-110 <br /> Nitrite as N 45WN02B 04/02/2003:A251 MS mg/L 0.2284 101% 75-112 <br /> (SP 303262-01) MSD mg/L 0.2284 100% 75-112 <br /> MSRPD mg/L 0.0014 50.100 <br /> 450ONO2B 04/02/2003:A 00-CCB mg/L ND <0.1 <br /> 00-CCV mg/L 0.1522 98.8% 90-110 <br /> 01-CCB mg/L ND <0.1 <br /> 01-CCV mg/L 0.1522 98.8% 90-110 <br /> Odor 21508 04/01/2003:A222 Dup TON 0.00 1.0 <br /> PH 4500-H B 03/311`2003:5346 Dup units 0.3% 4.80 <br /> 4500-H B 03/31/2003:500-CCV units <br /> 01-CCV units <br /> 00-ICB umbos/cm <br /> 00-ICV umbos/cm <br /> 01-CCV umhos/cm <br /> 8.000 100% 95-105 <br /> 8.000 99.9% 95-105 <br /> Specific Conductance 2510B 04/02/2003:A ND <1 <br /> 10000 100% 95-105 <br /> 1000 102% 95-105 <br /> Sulfate 300.0 04/21/2003:A215 MS mg/L 1000 105% 96-113 <br /> (VI 340580-03) MSD mg/L 1000 106% 96-113 <br /> MSRPD mg/L 0.6% 2_2.29 <br /> 300.0 04/21/2003:A 01-CCB mg/L ND <1 <br /> 01-CCV mg/L 50.00 100% 90-110 <br /> 02-CCB mg/L ND <1 <br /> 02-CCV mg/L 50.00 102% 90-110 <br /> Total Alkalinity (as CaCO3) 2320B 04/07/2003:A202 Dup mg/L 0.3% 12.9 <br /> 23208 04/07/2003:A 00-CCV mg/L 234.9 101% 90-110 <br /> 0i-CCV mg/L 234.9 99.7% 90-110 <br /> Total Dissolved Solids 2540C 04/02t2003:A235 Blank mg/L ND <40 <br /> LCS mg/L 1000 102% 90-110 <br /> Dup mg/L 0.5% 10.0 <br /> Turbidity 2130B 04/01/2003:A245 Dup NTU 0.00 0.20 <br /> Report continued on next page... <br /> STK331687: Quality Control Page 3 <br />