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<br />i~G~ <br />i <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: 973559 Date: 01(21/48 <br />CUSTOMER: Greystone PROJECT: COSTILLA CO 484.05 ATTN: Nick Mathis <br />DC Type Description Reag. Code Lab ID Dilution Factor Dale Time <br />Test Method........: EPA 602 Batch........: 29729 Analyst ...: klk <br />Method Description.: Volatile Organics (Aromatics) Units........: <br />MB Method Blank 12/29/97 1030 <br />Parameter/Test Description OC Result oL Result True Value Orig. Value Calc. Result • Limits <br />Benzene ND 0.5 <br />E thylbenzene ND 0.5 <br />Toluene ND 0.5 <br />Xylenes (total) ND 0.5 <br />Test Method........: SN-846 8150 Batch........: 29956 Analyst ...: smc <br />Method Description.: Herbicides Units........: ugjL <br />MB Method el ank 4132 12/30/97 0620 <br />Parameter/Test Description DC Result OC Result True Value Orig. Value CaLc. Result • Limits <br />2,4-0 ND 1.2 <br />2,4-DB (BUtoxon) ND 0,41 <br />2,4,5-T ND 0,20 <br />2,4,5-TP (Silvex) ND 0,17 <br />Dalapon ND 5,8 <br />Dicamba ND 0.2T <br />D ich loroprop ND 0.65 <br />Dinoseb (DNBP) ND 0,07 <br />MCPA ND 250 <br />MLPP ND 200 <br />Test Method........; EPA 608 Batch........: 30012 Analyst ...: smc <br />Method Description.: Pesticides/PCBs (Organochlorine) Units........: ug/L <br />MB Method Blank 4126 01/05/98 2107 <br />Parameter/Test Description OC Result OC Result True Value Orig. Value Catc. Result • Limits <br />Aldrin ND 0.004 <br />alpha-BHC ND 0.003 <br />beta-BNL ND 0.006 <br />delta-BHC ND 0,009 <br />gamma-BNC (Lindane) ND 0.004 <br />Chlordane ND 0.014 <br />4,4'-000 ND 0.011 <br />4,4'-DDE ND 0.004 <br />4,4'-DDT ND 0.012 <br />Di eldrin ND 0.002 <br />Endosulf an I ND 0.014 <br />Endosuffan If ND 0.004 <br /> Page 8 <br /> <br />«~,.b., .o ,~„.. o„,c ec,.uv,.,o,,. c., ~...~,~., „~-,., ,..., .. .,m., ~. ~.. ., o.,..,.,,.,. • X-X REC R-RPD A-ABS Diff. D-X Diff. <br />a~.,.o .... ... . ..... ... ... ... o„~„.,. ~, ~.e. ,,.~.,»..w <br />