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~ ~Q~~ <br />CORE LABORATORIES <br />I D UAL i T Y C O N T R O L R E S U L T S <br />Job Number: 971377 Date: 06130/97 <br />' CUSTOMER: Greystone PROJECT: COSTILLA CO LANDFILL ATTN: Nick Mathis <br /> <br />Test Method........: EPA 200.7 Batch .............: 22166 Mal yst...: snth <br />Method Description.: Metals Analyst s(ICAP), Trace Reporting Limit...: 0.01 <br />Parameter..........: Chromium (Cr) Units .............: mg/L <br />DC Lab ID <br />1CV <br />iC8 <br />ISB <br />PDS 971377-1 <br />' MD 971377-1 <br />CCV <br />CCB <br />CCV <br />CCB <br />ISB <br />CCY <br />CCB <br />^ Test Method........: EPA 200.7 Batch .............: 22166 Analyst ...: soil <br />Method Description.: Metals Analysis(I CAP), Traee Reporting Limit...: 0.01 <br />Parameter..........: Copper (Cu) Units .............: ng/L <br />OC Lab IO <br />ICV <br />ICB <br />ISB <br />PDS 971377-1 <br />ND 971377-1 <br />CCV <br />' CCB <br />CCV <br />CCB <br />ISB <br />CCV <br />t CCB <br />Reagent OC Result OC Result True Value Orig. Value Calc. Result Units Date/Time <br />961106Y 2.01665 2.00 100.8 X REC 05/30/97 2016 <br />9702122 -0.00043 05/30/97 2059 <br />970515X 0.46803 0.5000 93.6 X REC 05/30/97 2109 <br />970515U 0.95745 1.000 0.00031 95.7 X REC 05130197 2137 <br /> 0.00049 0.00031 0.00018 ABS Di ff. 05/30/97 2145 <br />970304Y 2.51903 2.5 100.8 X REC 05/30/97 2216 <br />9702122 0.00008 05/30/97 2227 <br />970304Y 2.57046 Z.5 102.8 X REC 05/30/97 2322 <br />9702122 -0.00062 05/30/97 2330 <br />970515X 0.44235 0.5000 88.5 X REC 05/30/97 2343 <br />970304Y 2.SB111 2.5 103.2 X REC 05/30/97 2356 <br />9702122 -0.00078 05/30/97 2359 <br /> Test Method........: EPA 200.7 Batch .............: 22166 Analyst...: smh <br />I Method Description.: Metals Anal ysi s(ICAP), Trace Reporting Limit...: 0.03 <br /> Parameter..........: Iron (Fe) Units .............: ~/L <br />~~ OC Lab ID Reagent <br />' ICV 961106Y <br />ICB 9702122 <br />ISA 970418W <br />ISB <br />PDS 971377-1 970515X <br />970515U <br />MD 971377-1 <br />CCV 970304Y <br />CCB 9702122 <br />CCV 970304Y <br />' <br />CC8 9702122 <br />ISA 970418W <br />ISB 9705157( <br />CCV 970304Y <br />Reagent OC Result OC Result True Value Orig. Value Calc. Result Units Date/Time <br />961106Y 2.06274 2.00 103.1 X REC 05/30/97 2016 <br />9702122 -0.00094 05/30/97 2059 <br />970515X 0.45341 0.5000 90.7 X REC 05/30/97 2109 <br />970515U 0.96921 1.000 -0.00039 97.0 X REC 05/30/97 2137 <br /> -0.00022 -0.00039 0.00017 A85 Di ff. 05/30/97 2145 <br />970304Y 2.53730 2.5 101.5 X REC 05730197 2216 <br />9702122 -0.00053 05/30/97 2227 <br />970304Y 2.56262 2.5 102.5 X REC 05/30/97 2322 <br />9702122 -0.00015 05/30/97 2330 <br />970515X 0.44773 0.5000 89.5 X REC 05/30/97 2343 <br />970304Y 2.55318 2.5 102.1 X REC 05/30/97 2356 <br />9702122 -0.00041 05/30/97 2359 <br />OC Result DC Result True Value Orig. Value Calc. Result Units Date/Time <br />2.09830 2.00 104.9 X REC 05/30/97 2016 <br />-0.01870 05 (30!97 2059 <br />82.63357 100 82.6 X REC 05/30/97 2104 <br />80.15628 100 80.2 X REC 05/30/97 2109 <br />1.88759 2.0000 -0.01163 95.0 X REC 05/30/97 2137 <br />-0.02410 -0.01163 0.01247 ABS Diff. 05/30/97 2145 <br />5.13369 5.0 102.7 X REC 05/30/97 2216 <br />-0.02555 05/30/97 2227 <br />5.19003 5.0 103.8 X REC 05/30/97 2322 <br />-0.01839 05/30/97 2330 <br />85.03564 100 85.0 % REC 05!30/97 2340 <br />80.53345 100 80.5 X REC 05/30/97 2343 <br />5.16749 5.0 103.3 X REC 05/30/97 2356 <br />Page 22 <br />.. <br />