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<br />CORE LABORATORIES
<br />D U A L I T Y A S S U R A N C E M E T H O D S
<br />R E F E R E N C E S A N D N O 7 E 5
<br />Report Date: 09/16/98
<br />NATER LIMITS SOIL LIMITS
<br />Recovery RPD Recovery RPD
<br />SEMIVOLATILE ORGANICS
<br />Methods 625/8270 Surrogates
<br />Nitrobenzene-d5 35-114X 23-1207.
<br />2-Fluorobi phenyl 43-1167. 30-115X
<br />4-Terphenyl-d14 33-1417. 18-137X
<br />Phenol-db 10-94X 24-113%
<br />2-Fluorophenol 21-1007. 25-121%
<br />2,4,6-Tribramophenol 10-1237. 19-122X
<br />Methods 625/8270 Spike/Spike Duplicate
<br />Phenol 12-131% 42 53-118X 35
<br />2-Ch lorophenol 43-94X 40 49-124X 50
<br />1,4-Dich lorobenzene 41-82X 28 40-116X 27
<br />N-Nitroso-di-n-propylami ne 49-1117. 38 54-tOT/. 38
<br />1,2,4-Trichlorobenzene 48-100X 28 54-119% 23
<br />4-Chloro-3-methyl phenol 51-127% 42 64-122X 33
<br />Acenaphthene 67-112% 31 62-124X 19
<br />4-N itrophenol 10-151X 50 61-124% 50
<br />2,4-Dintrotoluene 69-119X 38 63-120X 47
<br />Pentachlorophenot 48-133X 50 63-119% 47
<br />Pyrene 74-116X 31 51-133X 36
<br />HERBICIDES
<br />Method 8150 Surrogate
<br />2,4-D ichlorophenylacetic acid 50-1507. 50-1507.
<br />Method 8150 Spike/Spike Duplicate
<br />2,4-D 41-1267. 25 41-1267. 25
<br />2,4,5-T 45-119X 25 45-1197. 25
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