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UTE-=ST <br />La bo ratio ri e. <br />CASE NARRATIVE / CONFORMANCE SUMMARY <br />Client: Contour Consulting Engineering Job No D12932 <br />Site: GCC Report Dat 6/10/2010 9:28:15 AM <br />On 04/30/2010, 5 sample(s), 0 Trip Blank(s) and 0 Field Blank(s) were received at Accutest Mountain States (AMS) at a temperature <br />of 5 °C. The samples were intact and properly preserved, unless noted below. An AMS Job Number of D12932 was assigned to the <br />project. The lab sample IDs, client sample IDs, and dates of sample collection are detailed in the report's Results Summary. <br />Specified quality control criteria were achieved for this job except as noted below. For more information, please refer to the analytical <br />results and QC summary pages. <br />Metals By Method EPA 200.7 <br />Matrix AQ Batch ID: MP1838 <br />All samples were digested within the recommended method holding time. <br />All samples were analyzed within the recommended method holding time. <br />® All method blanks for this batch meet method specific criteria. . <br />Samples D12953-2FDUP and D12953-2FMS were used as the QC samples for metals. <br />Metals By Method EPA 200.8 <br />Matrix AQ Batch ID: MP1839 <br />0 All samples were digested within the recommended method holding time. <br />All samples were analyzed within.the recommended method holding time. <br />0 All method blanks for this batch meet method specific criteria. <br />. Samples D12932-3FADUP and D12932-317AMS were used as the QC samples for metals. <br />N The RPDs for duplicate of Antimony, Arsenic, Lead, Silver, and Thallium are outside control limits for sample MP 1839-D1. The <br />RPD is acceptable due to low duplicate and sample concentrations. <br />Metals By Method EPA 245.1 <br />Matrix AQ Batch ID: MP1855 <br />All samples were digested within the recommended method holding time. <br />IN All samples were analyzed within the recommended method holding time. <br />• All method blanks for this batch meet method specific criteria. <br />• Samples D12865-IMS and D12865-1MSD were used as the QC samples for metals. <br />Wet Chemistry By Method EPA 300/SW846 9056 <br />Matrix AQ Batch ID: GPI867 <br />® All samples were prepared within the recommended method holding time. <br />All samples were analyzed within the recommended method holding time. <br />All method blanks for this batch meet method specific criteria. <br />® Samples D12442-6DUP and D12934-1AMS were used as the QC samples for Chloride, Nitrate as Nitrogen, Nitrite as Nitrogen, <br />and Sulfate. <br />D12932-2, D12932-3, D12932-4 for Nitrate-N and Nitrite-N: Elevated detection limit due to matrix interference. <br />® D12932-1 for Nitrite-N: Elevated detection limit due to matrix interference. <br />Thursday, June 10, 2010 <br />Page 1 of3 <br />M® 5 of 50 <br />CI ACCUTIE'ST, <br />- . <br />D12932 - ' • w% 71