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i~i~e CORE LABORATORIES D U A L I T Y A S S U R A N C E M E T H O D S REFERENCE S A N D N O T E S Report Dete: 06/26/98 MATER LIMITS SOIL LIMITS Recovery RPD Recovery RPD VOLATILE ORGANICS Methods 602/8020 Surrogate Bromof luorobenzene 89-110% 78-123% Methods 602/8020 Spike/Spike Duplicate Benzene 39-150% 25 75-125% 25 Ethyl benzene 32-160% 25 60-140% 25 Toluene 46-148% 25 7D-130% 25 Xylenes 75-125% 25 61.139% 25 Method 8015 Mod. Spike/Spike Duplicate TVPH 75-125% 20 48-152% 20 TEPH 54-135% 20 54-135% 20 Methods 624/8240/8260 Surrogates Dibromof luoromethane E6-118% 80-120% Toluene-(d8) 88-110% 81-117% 4-Bromofluorobenzene 86-115% 74-121% Method 524.2 Surrogates 4-Bromof luorobenzene 80-120% 1,4-Dichlorobenzene-d4 BO-120% Methods 624/8240 Spike/Spike Duplicate 1,1-Dich loroethene 61-145% 14 59-172% 22 Trichloroethene 71-120% 14 62-137% 24 Benzene 76-127% 11 66-142% 21 Toluene 76-125% 13 59-139% 21 Ch lorobenzene 75-130% 13 60-133% 21 Method 8260 Spike/Spike Duplicate 1,1-D ich loroethene 70-130% 14 70-130% 22 Trichloroethene 71-120% 14 70-130% 24 eenxene 76-127% 11 70-130% 21 Toluene 76-125% 13 70-130% 21 Ch lorobenzene 75-130% 13 70-130% 21 Method 524.2 Spike/Spike Dupl icate 1,1-D ich loroethene 80-120% 14 Trichloroethene 80-120% 14 Benzene 80-120% 11 Toluene 80-120% 13 Chlorobenzene 80-120% 13 PESTICIDES AND PCB'S Methods 608/8080 Surrogates Tetrachloro-m-xylene 60-150% 6D-150% 4,4'-D ichlorobiphenyl 60-150% 60-150% Decachlorobipheny! 60-150% 60-150% Method 8140 Surrogates Tributylphosphate 36-152% 36-152% Triphenylphosphate 36-152% 3b-152% Page 1 ..~..,.., o..~...~ io. ~~ ,.~..-a~ oo~...oa,.o~~.. cow uooao~..~o.........m.. ~ .,,o ....~~.~...~e„ . >d~ o„mv.a m. ~ ~m..p ..o... a.u...,, ...~... ~o ~.. o.mr~.~i. Geo. ao...U. a o~oa.e.~w.. .,. a ~o.~..a.e~....~.,.m.,~...,,~„~~,a...~.~.n..n,A~,,.~,.ao-,.~.~er.~...~.~.~b.. iw .~~~..~~~,.dw~a .,-wo- o.~~~N....~r xo,a. o~co,. ~,.ti~.,