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April 24, 2001 Lab ID STK131568 <br /> FfG Construction Materials Customer : 3-12612 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Fluoride 300.0 04/10/2001:A 01-CCB mg/L ND <0.1 <br /> 01-CCV mg/L 5.000 92.6% 90-110 <br /> Hydroxide 2320B 04/13/2001:A202 Dup mg/L 0.00 10 <br /> Alkalinity (as CaCO3) 2320B 04/13/2001:A 00-CCV mg/L 234.9 100% 90-110 <br /> Ol-CCV mg/L 234.9 99.6% 90-110' <br /> MBAs (foaming agents) 5540C 04/30/2001:A218 MS mg/L 0.1000 100% 90-110 <br /> (SP 102931-02) MSD mg/L 0.1000 100% 90-110 <br /> MSRPD mg/L 0.00 50.100 <br /> 5540C 04/10/2001:A 00-CCB mg/L ND <0.1 <br /> 00-CCV mg/L 0.1000 100% 99-101 <br /> Nitrate 300.0 04/10/2001:A215 LCS mg/L 40.00 98.9% 90-110 <br /> MS mg/L 400.0 98.5% 87-120 <br /> (SP 102932-01) MSD mg/L' 400.0 100% 87-120 <br /> MSRPD mg/L 1.8% 53.18 <br /> 300.0 04/30/2001:A 00-CCB mg/L ND <0.4 <br /> 00-CCV_ mg/L 40.00 98.1% 90-110 <br /> 01-CCB mg/L ND <0.4 <br /> 01-CCV mg/L 40.00 100% 90-110 <br /> Nitrite 300.0 04/10/2001:A215 LCS mg/L 30.00 97.2% 90-110 <br /> MS mg/L 300.0 96.9% 85-119 <br /> (SP 102932-01) MSD mg/L 300.0 98.6% 85-119 <br /> MSRPD mg/L 1.7% 53.31 <br /> 300.0 04/10/2001:A 00-CCB mg/L ND <0.3 <br /> 00-CCV mg/L 30.00 96.4% 90-110 <br /> 01-CCB mg/L ND <0.3 <br /> 01-CCV mg/L 30.00 98.2% 90-110 <br /> pH 4500-H B 04/09/2001:S346 Dup units 1.7% 1.4 440 <br /> 4500-H B 04/09/2001:5 00-CCV units 8.000 105% 95-105 <br /> 01-CCV units 8.000 100% 95-105 <br /> Specific Conductance 2510E 04/11/2001:A212 Blank utnhos/cm ND <1 <br /> Dup utnhos/cm 0.0% 20.0 <br /> 25108 04/I1/2001:A 00-ICB umhos/cm ND <1 <br /> 00-ICV umhos/cm 9986 98.6% 95-105 <br /> 01-CCV umhos/cm 1000 99.8% 95-105 <br /> Sulfate 300.0 04/10/2001:A215 LCS mg/L 10.0 98.2% 90-110 <br /> MS m1 <br /> g/L 1000 98.2% 85-122 <br /> (SP 102932-01) MSD mg/L 1000 100% 85-122 <br /> MSRPD mg/L 1.9% <2.95 <br /> 300.0 <br /> ND <1 <br /> 00-CCH mg/L <br /> 00-CCV mg/L 100.0 97.3% 90-110 <br /> 04/10/2001:A <br /> Report continued on next page... <br /> STK131568: Quality Control Page 3 <br />