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<br />~J <br />~au~ <br />CORE LABORATORIES <br />0 UAL I T Y A S S U R A N C E M E T H O D S <br />i R E F E R E N C E S A N D N O T E S <br />Report Date: 06!30/97 <br />1 <br />1 <br />i , <br />I <br />I 1 <br />i <br />WATER LIMITS SOIL LIMITS <br />Recovery RPD Recovery RPD <br />SEMIYOLAT ILE ORGANICS <br />Methods 625/8270 Surrogates <br />Nitrobenzene-d5 35-114% <br />2-Fluorobiphenyl 43-116% <br />4-Terphmyl-d14 33-141% <br />Phenol-d6 10-94X <br />2-Fluorophenol 21-t00X <br />2,4,6-T ri bronophenol 10-123% <br />Methods 625/8270 Spike/Spike Dupl icate <br />Phenol 12-110% 42 <br />2-Chlorophenol 27-123% 40 <br />1,4-Dichlorobenzene 36.97% 28 <br />N-Nitroso-di-n-propylamine 41-116% 38 <br />1,2,4-T richtorobenzene 39.98% 28 <br />4-Chloro-3-methylphenol 23-97X 42 <br />Acenephthene 46.118% 31 <br />4-Nitrophenol 10-BOX 50 <br />2,4-Dintrotoluene 24-96X 38 <br />Pentach lorophenol 9-103% 50 <br />Pyrene 26-127% 31 <br />I XERBICIDES <br />' 11I Method 8150 Surrogate <br />2,4-Dichlorophenyl acetic acid 50-150% <br />Method 8150 Spike/Spike Duplicate <br />. Z,4-D 41-126% 25 <br />2,4,5-T 45.119% 25 <br />i <br />1 <br />1 <br /> <br />LJ <br />23-120% <br />30-115% <br />18-137% <br />24-113% <br />25.121% <br />19.122% <br />26-90X 35 <br />25-102% 50 <br />28-104% 27 <br />41-126% 38 <br />38-107% 23 <br />26-103% 33 <br />31-137% 19 <br />11-114% 50 <br />28.89% 47 <br />17-109% 47 <br />35-142% 36 <br />50-150% <br />41.126% 25 <br />45-119% 25 <br />Page Z <br /> <br />