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<br />
<br />CORE LABORATORIES
<br />Q U A L I T Y C O N T R O L R E S U L T S
<br />Job Number.: 981513 Report Date.: 06/26/98
<br />CUSTOMER: Greystone PROJECT: OTRY 484-03 ATTN: Nick Mathis
<br />Test Method........: 54-846 7421 Batch .............: 36225 Analyst...: cjo
<br />Method Description.: Lead (G FAA) Onits .............: mg/L
<br />Parameter..........: Leed (Pb)
<br />OC Lab ID Reagent OC Resul[ OC Result True Value Orig. Value Calc. Result * Limits Date Time
<br />SD 981379.2 -0.00025 0.00016 06/24/1998 1301
<br />MS 981379.2 980325E 0.02307 0.020000 0.00016 114.5 X 80-120 06/24/1998 1307
<br />MSD 981379.2 980325E 0.02373 0.02307 0.020000 0.00016 117.8 X 80-120 06!24{1998 1313
<br /> 2.8 R 20
<br />CCV 980624A 0.05142 0.050000 102.8 X 90-110 Ob/24 /1448 1343
<br />CCB 06248 -0.00033 0.002 06/24/1998 1349
<br />CCV 980624A 0.04927 0.050000 98.5 X 90-110 06/24/1998 1455
<br />CCB 06248 -0.00029 0.002 06/24/1998 1501
<br />CCV 980624A 0.05185 0.050000 103.7 X 90-110 06/24/1998 1608
<br />CCB 06248 -0.00026 0.002 06/24/1998 1614
<br />CCV 980624A 0.05102 0.050000 102.0 X 90-110 06/24/1998 1708
<br />CCB 06248 -0.00030 0.002 06/2471998 1714
<br />CCV 980624A 0.04668 0.050000 93.4 X 90-110 06/24/1998 1810
<br />CCB 06248 -0.00101 0.002 06/24/1998 1813
<br />PDS 981562.1 980511H 0.02069 0.020000 -0.00021 104.5 X 75-125 06/24/1998 1828
<br />PSD 981562-1 980511H 0.02045 0.02069 0.020000 -0.00021 103.3 X 75-125 06/24/1998 1831
<br /> 1.2 R 20
<br />CCV 980624A 0.04778 0.050000 95.6 X 90-110 06/24/1998 1835
<br />CCB 06248 -0.00095 0.002 06/24/1998 1841
<br />MB 0514 -0.00015 0.002 06/24/1998 1853
<br />LCS 980366 0.08521 0.095000 89.7 X 60.0-140.5 06/24/1998 1859
<br />MS 981225-1 980325E 0.06050 0.020000 0.04425 81.2 X 80-120 06/24/1998 1911
<br />MSD 981225.1 980325E 0.06953 0.06050 0.020000 0.04425 126.4 X 80-120 06/24/1998 1917
<br /> 13.9 R 20
<br />CCV 980624A 0.04720 0,050000 94.4 X 90-110 06/24/1998 1946
<br />CCB 06248 -0.00118 0.002 06/24/1996 1952
<br />CCV 980624A 0.04920 0.050000 98.4 X 90-110 06/24/1998 2058
<br />CCB 06248 -0.00131 0.002 06/24!1998 2104
<br />CCV 980624A 0.05089 0,050000 101.6 X 90-110 06/24/1998 2210
<br />CCB 06248 -0.00124 0.002 06/24/1998 2216
<br />CCV 980624A 0.05265 0.050000 105.3 X 90-110 06/24/1998 2234
<br />CCB 06248 -0.00097 0.002 06/24/1998 2239
<br />PDS 961513-2 980511H 0.02068 0.020000 -0.00094 108.3 X 75-125 06/24/1998 2248
<br />PSD 981513.2 960511x 0.02057 0.02068 0.020000 -0.00099 107.8 X 75-125 06/24/1998 2253
<br /> 0.5 R 20
<br />PDS 481225-1 980511H 0.06004 0,020000 0.04425 79.0 X 75-125 06/24/1996 2259
<br />PSD 981225-1 980511N 0.05980 0.06004 0.020000 0.04425 77.8 X 75-125 06/24/1998 2305
<br /> 0.4 R 20
<br />CCV 980624A 0.04986 0,050000 99.7 X 90-110 06/24/1998 2317
<br />CCB 06248 -0.00121 0.002 0684/1998 2325
<br />CCV 980624A 0.05077 0.050000 101.5 X 90-110 0685/1998 0001
<br />CCB 06246 -0.00102 0.002 06/25!1998 0007
<br />CCY 980624A 0.05256 0.050000 105.1 X 90-110 06/25/1998 0112
<br />CCB 06248 -0.00090 0.002 0685/1998 0118
<br />CCV 980624A 0.05256 0.050000 105.1 X 90-110 06/25/1998 0223
<br />CCB 06248 -0.00106 0.002 06/25/1998 0229
<br />CCV 980624A 0.05315 0.050000 106.3 X 90-110 06/25/1998 0335
<br />CCB 06248 -0.00094 0.002 06/25/1998 0341
<br />Page 12
<br />* X=X REC, R=RPD, A=ABS Dif f., D=X Diff.
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