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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 />rob Number: 973559 Date: 01/21/98
<br />CUSTOMER: Greys tone PROOECT: COSTI LLA CO 484.05 ATTN: Nick Mathis
<br />OC Type Description Reag. Code Lab ID Dilution Factor Date Time
<br />MO Method Blank 4145 01/05/98 2335
<br />Parameter/Test Description OC Result OC Result True Value Orig. Value CaLc. Result • Li mils
<br />Endrin aldehyde ND 0.023
<br />Heptach Lor ND 0.003
<br />Heptachlor epoxide ND 0.083
<br />Toxaphene ND 0.24
<br />Test Method........: EPA 608 Batch........: 30013 Analyst ...: smc
<br />Method Description.: Pesticides/PCBs (Organochlori ne) Units........: ug/L
<br />MB Method Blank 4126 01/07/98 1116
<br />Parameter/Test Description OC Result DL Result True Value Ori 9. Value Lalc. Result ' Limits
<br />Aroclor 1016 ND 0.05
<br />Arotfor 1221 ND 0.05
<br />Arotfor 1232 ND 0.05
<br />Arotfor 1242 ND 0.05
<br />Aroclor 1248 ND 0.05
<br />Arotfor 1254 ND 0.05
<br />Arotfor 1260 ND 0.05
<br />MB Method Blank 4145 01/07!97 1243
<br />Parameter/Test Description OL Result OC Result True Value Orig. Value Calc. Result • Limits
<br />Aroclor 1016 ND 0.05
<br />Aroclor 1221 ND 0.05
<br />Aroclor 1232 ND 0.05
<br />Aroclor 1242 ND 0.05
<br />Aroclor 1248 ND 0.05
<br />Aroclor 1254 ND 0.05
<br />Aroclor 1260 ND 0.05
<br />Page 10
<br />• X-X REC R-RPD A-ABS Diff. D-X Diff.
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