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1 <br />1 I,UM,~"~B <br />CORE LABORATORIES <br />' 0 UAL I T Y C O N T R O L R E S U L T S <br />Job Nunber: 971377 Date: 06/3D/97 <br />' CUSTOMER: Oreystone PROJECT: COSTILLA CO LANDFILL ATTM: Niek Mathis <br />DC Type Description Reag. Code Lab ID Dilution Factor Date Time <br />M8 ~ Method Blank ~ M82961 ~ ~ ~ 06/07/97 0057 <br />Parameter/Test Description DC Result OL Result Rep. Limit True Value Orig. Value Calc. Result Units F <br />Irdeno(1, 2,3-cd)pyrene ND 10 <br />tsophorone ND 10 <br />Naph thelene ND 10 <br />Nitrobenzene ND 10 <br />' <br />n-Nitrosadimethylamine ND 20 <br />n-Nitrosodi-n-propy lami rte ND 10 <br />n-Nitrosadiphenyl amine ND 10 <br />Phenanth rene <br />Pyrene ND <br />ND 10 <br />10 <br />1,2,4-Trichlorobenzene ND 10 <br />4•Ch Toro-3-methyl phenol ND 10 <br />2-Chlorophenol ND 10 <br />2,4-Dichlorophenol ND 10 <br />' <br />2,4•Dimethylphenol ND 10 <br />2,4-D initrophenol ND 50 <br />2-Methyl-4,6•dinitrophenol ND 50 <br />2-Nitrophenol ND 10 <br />,4-Nitrophenol ND 50 <br />Pen[achlorophenol ND 50 <br />Phenol ND 10 <br />2, 4, 6-Trich lorophenol ND 10 <br /> <br /> LCS Laboratory Control Sample 84703198 Obl07{97 0158 <br />Parameter/Test Description DC Result OL Result Rep. Limit True Value Orig. Value Calc. Result Units F <br />~Acenaphthene 85.28 10 100.0 85.3 X REC <br />1,4-Dish lorobenzene 59.51 10 100.3 59.3 X REC <br />2,4-Dinitrotoluene 88.15 10 100.1 88.1 X REC <br />n-Nitrosodi-n-propylamine 80.85 10 100.0 80.8 X REC <br />Pyrene 100.51 10 100.1 100.4 X REC <br />1,2,4-Trichlorobenzene 66.53 10 100.0 66.5 X REC <br />4-Chloro-3-methylphenol 86.48 10 99.99 86.5 X REC <br />2-Ch Lorophenol 69.74 10 99.93 69.8 X REC <br />'4-N itrophenol 33.83 50 99.90 33.9 X REC <br />Pentachlorophenol 82.56 50 99.89 82.7 X REC <br />Phenol 30.99 10 99.87 31.0 X REC <br />' LCD Laboratory Control Sample Duplicate B9703198 06/07/97 0259 <br />Parameter/Test Description OC Result OC Result Rep. Limit True Value Orig. Value Cal c. Result Units F <br />'Acenaph thane 88.96 85.28 10 100.0 89.0 X REC <br /> 4.2 RPD <br />1,4-Dick lorobenzene 67.60 59.51 10 100.3 67.4 X REC <br /> 12.7 RPD <br />2,4-Dinitrotoluene 86.26 88.15 10 100.1 86.2 X REC <br /> 2.2 RPD <br />n-Nitrosodi-n-propylemine 87.95 80.85 10 100.0 88.0 X REC <br /> 8.4 RPD <br />1 <br /> Page 31 <br /> <br /> <br />