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i rWR~~ • CORE LABORATORIES D U A L I T Y REFER A S S ENCE Report U R A N C E M E T H O D S S A N D N O T E S Dete: 03/25/98 WATER 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 39-750% 25 75-125% 25 Ethyl benzene 32-160% 25 60-140% 25 Toluene 46-748% 25 70-730% 25 xylenes 75-125% 25 61-139% 25 Method 8015 Mod. Spike/Spike Duplicate TVPH 75-125% 20 48-152% 20 TEPN 54-135% 20 54-135% 20 Methods 624/8240/8260 Surrogates Dibromofluoramethane 86-178% 80-720% Toluene•(d8) 88-710% 81-117% 4-Bromofluorobenzene 86-715% 74-121% Method 524.2 Surrogates 4-Bronwfluorobenzene BO-120% 1,4-Dichlorobenzene-d4 BO-120% Methods 624/8240 Spike/Spike Duplicate 7,7-Dichloroethene 61-145% 74 59-172% 22 Trichloroethene 71-120% 74 62-137% 24 Benzene 76-127% 11 66-142% 21 Toluene 76-125% 13 59-139% 27 Chlorobenzene 75-730% 13 60-733% 21 Method 8260 Spike/Spike Duplicate 1, 7-Dichloroethene 70.130% 14 70-730% 22 Trichloroethene 71-120% 74 70-130% 24 Benzene 76-127% 11 70-130% 21 Toluene 76-725% 73 70-130% 27 Ch lorobenzene 75-130% 13 70-130% 27 Method 524.2 Spike/Spike Duplicate 1, 7-D ich loroethene 80-720% 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% 60-150% 4,4'-D ichlorobiphenyl 60-750% 60-150% Decach torobiphenyl 60-150% 60-150% Method 8140 Surrogates T ributylphospha[e 36-152% 36-152% Triphenylphosphate 36-152% 36-152% Page 7 ..d..wc.d...~~~.o.iiwem~o-m ra,.~.o.~.b.co.~.oo--. oo. .o....~^~,,. e~o•..N d'w o...~iroM .~,~~.+..+.a..•n~.~a..a~w:w~...m...m n. o~,~iMn ew.~w.n~. o, o,ou,~...m .~. d w. ~. d om., ~..~.. boon.. ,.r a.ra ., m.~w..~. •,.m.~~..m.. ra d,.w m+m, n,..on.w..o... n.,.w+w,o. ,.,.>m~w ,,.w.>.n e.~...wa ~....n.n.oo,>.. o. co. uoo,o~