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ACZ Laboratories, Inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487 (800) 334 -5493 <br />City of Ouray ACZ Project ID: L94059 <br />L94059 -01 WG321793 <br />Aluminum (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 10x MDL). <br />WG321802 <br />Aluminum, total (3050) <br />M6010B ICP <br />M3 <br />The spike recovery value is unusable since the analyte <br />concentration in the sample is disproportionate to the spike <br />level. The recovery of the associated control sample (LCS <br />or LFB) was acceptable <br />WG321920 <br />Arsenic (1312) <br />M6020 ICP -MS <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 1 Ox MDL). <br />WG321911 <br />Arsenic, total (3050) <br />M6020 ICP -MS <br />M1 <br />Matrix spike recovery was high, the recovery of the <br />associated control sample (LCS or LFB) was acceptable. <br />M6020 ICP -MS <br />RD <br />For a solid matrix, the duplicate RPD (spike or matrix) <br />exceeded the control limit, which is attributable to the non - <br />homogeneity of the sample. <br />WG321802 <br />Barium, total (3050) <br />M6010B ICP <br />M3 <br />The spike recovery value is unusable since the analyte <br />concentration in the sample is disproportionate to the spike <br />level. The recovery of the associated control sample (LCS <br />or LFB) was acceptable <br />WG321793 <br />Beryllium (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 1 Ox MDL). <br />Cadmium (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 1 Ox MDL). <br />Chromium (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 1 Ox MDL). <br />WG321802 <br />Chromium, total (3050) <br />M6010B ICP <br />M1 <br />Matrix spike recovery was high, the recovery of the <br />associated control sample (LCS or LFB) was acceptable <br />WG321793 <br />Cobalt (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 1 Ox MDL). <br />Copper (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 1 Ox MDL). <br />WG321802 <br />Copper, total (3050) <br />M6010B ICP <br />ZG <br />The ICP Serial Dilution was not used for data validation <br />because the sample concentration was less than 50 times <br />the MDL. <br />WG321793 <br />Iron (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 1 Ox MDL). <br />WG321802 <br />Iron, total (3050) <br />M6010B ICP <br />M3 <br />The spike recovery value is unusable since the analyte <br />concentration in the sample is disproportionate to the spike <br />level. The recovery of the associated control sample (LCS <br />or LFB) was acceptable. <br />WG321920 <br />Lead (1312) <br />M6020 ICP -MS <br />RD <br />For a solid matrix, the duplicate RPD (spike or matrix) <br />exceeded the control limit, which is attributable to the non - <br />homogeneity of the sample. <br />WG321987 <br />Lead, total (3050) <br />M6020 ICP -MS <br />M3 <br />The spike recovery value is unusable since the analyte <br />concentration in the sample is disproportionate to the spike <br />level. The recovery of the associated control sample (LCS <br />or LFB) was acceptable. <br />WG321793 <br />Magnesium (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 1 Ox MDL). <br />Manganese (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 10x MDL). <br />WG321823 <br />Mercury (1312) <br />M7470A CVAA <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 10x MDL). <br />WG321793 <br />Nickel (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />accurate evaluation (< 1 Ox MDL). <br />Potassium (1312) <br />M6010B ICP <br />RA <br />Relative Percent Difference (RPD) was not used for data <br />validation because the sample concentration is too low for <br />REPAD.15.06.05.01 <br />Page 8 of 13 <br />