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<br />CORE LABORATORIES
<br />D U A L I T Y C O N T R O L R E S U L T S
<br />Job Number: 962453 Date: 09/28/96
<br />CUSTOMER: Greystone PROJECT: 484-03 ATTN: Ray Faciski
<br />Test Method........: EPA 375. 2 Batch .............: 13522 Analyst...: dme
<br />Method Description.: Sulfate (Automated MTB, AAII) Reporting Limit...: 10.
<br />Parameter..........: Sulfate (S04) Units .............: mg/L
<br />OL Lab ID Reagent OC Result OC Result True Value Orig. Value Calc. Result Units Date/Time
<br />MD 962494-1 32.62813 33.01341 0.38528 ABS Diff. 09/21/96 1634
<br />MS 962494-1 G960610A 79.35078 50.000000 33.01341 92.7 % REC 09!21(46 1636
<br />I CCV G960415E 78.10455 BO 97.6 X REC 09/21/96 1652
<br />LCB 1.63957 09/21/96 1654
<br />Test Method........: EPA 200.7 Batch ............ .: 13526 Analyst...: gag
<br />Method Description.: Metals Analysis(ICAP), Trace Reporting Limit.. .: 0.01
<br />Parameter..........: Arsenic (AS) Units ............ .: mg/L
<br />DC Lab ID Reagent OL Result OC Result True Value Orig. Value Calc. Result Units Date/Time
<br />ICV 9606182 2.02864 2.00 101.4 X REL 09/20/96 0950
<br />ICB 9608022 0.00385 09/20/96 1024
<br />ISB 960630H 1.03351 1.000 103.4 Y. REC 09/20/96 1046
<br />MD 962449-1 0.00912 0.00575 0.00337 ABS Diff. 09/20/96 1312
<br />PDS 962449-1 960917G 1.00609 1.000 0.00575 100.0 X REC 09/20/96 1322
<br />CCV 9606107 2.57488 2.5 103.0 X REC 09/20/96 1343
<br />CCB 9608022 -0.00111 09/20/96 1412
<br />MD 962556-1 0.00510 0.00581 0.00071 ABS Diff. 09/20/96 1451
<br />PDS 962556-1 960917C 0.98849 1.000 0.00581 98.3 Y. REC 09/20/96 1456
<br />CCV 9606107 2.59062 2.5 103.6 X REC 09/20/96 1524
<br />LCB 9608022 -0.00183 09/20/96 1533
<br />CLV 9606107 2.55402 2.5 102.2 X REL 09/20/96 1636
<br />LLB 9608022 -0.00227 09120!96 1646
<br />ISB 960630H 0.98496 1.000 98.5 X REC 09/20/96 1658
<br />CCV 9606107 2.57357 2.5 102.9 X REL 09/20/96 1705
<br />CCB 9608022 -0.00281 09/20/96 1715
<br />Test Method........: EPA 200.7 Batch .............: 13526 Analyst...: gag
<br />Method Description.: Metals Analysis(ICAP ), Trace Reporting Limit...: 0.001
<br />Parameter..........: Barium (Ba) Units .............: mg/L
<br />DC Lab ID Reagent OC Result DC Result True Value Orig. Value Calc. Result
<br />ICV 9606187 1.96145 2.DD 98.1
<br />ICB 9608022 0.00097
<br />ISB 960630H 0.53688 0.5000 107.4
<br />MD 962449-1 0.05261 0.05226 0.7
<br />PDS 962449-1 960917G 1.09765 1.000 0.05226 104.5
<br />CCV 9606107 5.03780 5.0 100.8
<br />CCB 9608022 -0.00029
<br />MD 962556-1 0.10143 0.09864 2.8
<br />PDS 962556-1 960917G 1.13009 1.000 0.09864 103.1
<br />CCV 9606107 4.99833 5.0 100.0
<br />CCB 9608022 0.00039
<br />CCV 9606107 4.94743 5-0 48.4
<br />CCB 9608022 0.00000
<br />ISB 960630H 0.52709 0.5000 105.4
<br />Ltv 9606107 4.93527 5.0 98.7
<br />LCB 9608022 0.00010
<br />Page 20
<br />Units Date/Time
<br />X REC 09/20/96 0956
<br />09/20/96 1024
<br />Y. REC 09/20/96 1046
<br />RPD 09/20/96 1312
<br />Y. REC 09/20/96 1322
<br />X REC 09/20/96 1343
<br />09/20/96 1412
<br />RPD 09/20/96 1451
<br />% REC 09/20/96 1456
<br />X REC 09/20/96 1524
<br />09/20/96 1533
<br />X REC 09!20!96 1636
<br />09/20/96 1646
<br />Y. REC 09/20/96 1658
<br />X REC 09/20/96 1705
<br />09/20/96 1715
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