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CASE NARRATIVE/CONFORMANCE SUMMARY <br /> Client: Cemex Job No D81617 <br /> Site: Lyons Quarry TR-15 Kiln Baghouses Dust Report Date 4/22/2016 2:01:28 PM <br /> On 04/12/2016, 1 sample(s),0 Trip 13"(s),and 0 Field Blank(s)were received at Accutest Mountain States(AMS)at a temperature <br /> of 20.4'C.The samples were intact and properly preserved,unless noted below. An AMS Job Number of D81617 was assigned to <br /> the project. The lab sample ID,client sample ID,and date 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 SW846 6010C <br /> Matrix LEACHATE Batch ID: MP18471 <br /> ■ All samples were digested and analyzed within the recommended method holding time. <br /> ■ All method blanks for this batch meet method specific criteria. <br /> ■ Sample(s) D81617-1BMS,D81617-1BMSD,D81617-1BSDL were used as the QC samples for the metals analysis. <br /> ■ The matrix spike(MS)recovery(s)of Selenium are outside control limits. Spike recovery indicates possible matrix interference <br /> and/or sample nonhomogeneity. <br /> ■ The matrix spike duplicate(MSD)recovery(s)of Selenium are outside control limits. High RPD due to possible sample matrix or <br /> nonhomogeneity. <br /> ■ The RPD(s)for the MS and MSD recoveries of Selenium are outside control Knits for sample MP18471-S2. High RPD due to <br /> possible sample matrix or nonhomogeneity. <br /> ■ D81617-1B for Arsenic:Elevated reporting limit(s)due to matrix interference. <br /> ■ D81617-113 for Selenium:Elevated detection limit due to dilution required for possible matrix interference. <br /> Matrix SO Batch ID: W 18462 <br /> ■ All samples were digested and analyzed within the recommended method holding time. <br /> ■ All method blanks for this batch meet method specific criteria. <br /> ■ Sample(s) D81651-9MS,D81651-9MSD,D81651-9SDL were used as the QC samples for the metals analysis. <br /> ■ The matrix spice(MS)recovery(s)of Uranium,Antimony are outside control limits. Spike recovery indicates possible matrix <br /> interference and/or sample nonhomogeneity. <br /> ■ The matrix spike duplicate(MSD)recovery(s)of Antimony,Uranium are outside control limits. High RPD due to possible <br /> sample matrix or nonhomogeneity. <br /> ■ The RPD(s)for the MS and MSD recoveries of Uranium are outside control limits for sample MP 18462-S2. High RPD due to <br /> possible sample matrix or nonhomogeneity. <br /> ■ The serial dilution RPD(s)for Lead,Molybdenum,Nickel,Silver,Chromium are outside control limits for sample MP 18462- <br /> SDI. Percent difference acceptable due to low initial sample concentration(<50 times IDL). <br /> ■ MP18462-SDI for Chromium:Serial dilution indicates possible matrix interference. <br /> ■ MP18462-S I for Antimony:Spice recovery indicates possible matrix interference. <br /> ■ D81617-1 for Molybdenum:Elevated detection limit due to dilution required for possible matrix interference. <br /> Metals By Method SW846 7470A <br /> Matrix LEACHATE Batch ID: MP18473 <br /> ■ All samples were digested and analyzed within the recommended method holding time. <br /> ■ All method blanks for this batch meet method specific criteria. <br /> ■ Sample(s) D81187-1MS,D81187-1MSD were used as the QC samples for the metals analysis. <br /> Friday,April22,2016 Page 1 of 2 <br /> � 4of46 <br /> ACCUTEST <br /> D81617 <br />