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3500 LABORATORY & FIELD TEST EVALUATIONS TABLE OF CONTENTS I* Laboratory Evaluations Ccmpound(g) a. Toluene Evaluator KitazatO University, Japan b4 Toluene and Toluene Technical Research Center of mixture with iso Butanol, Finland Acetone, and Perchloroethylene c. Styrene/Acetone mixture Jutlandish institute of Technology, Denmark d. vinyl Chloride Chemical Company (anonymous) Summary Four levels from 10-200 ppn were generated in a test chamber and monitors exposed to these concentrations over varying time intervals* The Center ran controlled laboratory comparisons of the #3500 vs, standard charcoal tubes and low flow pumps. The compounds studied were Toluene, a mixture Of Toluene and Iso Butyl Alcohol, Acetone, and Perchloroethylene. Chamber concentrations were checked by Micron IA infrared and by direct GC analysis. The Jutlandish institute of Technology in Denmark performed a Laboratory comparison of a Styrene and Acetone mixture using #3500 Ovm and SKC standard charcoal tubes. Low flow pumps were used for the kc tubes and both systems were exposed for four hours. An airstream containing 0.$1 ppm of VC was passed over the #3500 for fifteen minutes at two liters per minute. Relative Precision at 95% confidence level was 15% for the #3500 and 114% for the tube. e. Dichloromethane, 1, 2 Dichloroethane, Tetrachloroethylene, Heptane f. Enflurane 3M OH & SP Division II. Field Evaluations Compound(s) a. Complex Mixtures Ketones and Chlorinated Hydrocarbons Evaluator Chemical company (anonymous) b. Benzene, Toluene Xylene in complex mixtures Oil company (anonymous) c. Benzene, Toluene Chemical Company (anonymous) d. 1, 1, 2 Trichloroethylene %. Acetone 3M industrial Hygiene Department Chemical Company (anonymous) f. Benzene Steel Company (anonymous) III. Lab/Field Evaluations Compound(b) a. Halothane Enflurane b. Methyl Methacrylate R-3SLFT-A Evaluator U. S. Army Environmental Hygiene Agency Chemical Company (anonymous) Data show that the #3500 is gas tight. This data is valid in its conclusions only when the compound is stable. The data relates storage time to recovery coefficients {Desorption Efficiency). A study at an eastern U.S. university was carried out comparing the #3500, Miran IA, and Charcoal Tube (C,T.) to a known concentration in an exposure chamber. The #3500 correlated well with the tank concentration and had excellent coefficient of var'ance. A field comparison was conducted between a 600 mgcharcoal tube and the #3500 in a complex mixture. Agreement is good for all cases except acetone, where it appears the #3500 samples are high. An explanation IS given. A major oil company ran extensive side-by-side comparative studies of standard charcoal tubes and the #3500, Thirty samples were taken for Benzene, Toluene, and xylene. These compounds were present together in a complex mixture of hydrocarbons. A U.S. chemical company ran side-by-side personal exposures with the #3500 and standard charcoal tubes. Benzene and Toluene were both present in the air. Personal samples were run in a 3M plant. Samples were run for four hours and converted to tlv-twa. correlation was good between the two methods. Three separate methods of measuring acetone in a field area sample were used. The 600 mg. tubes were used in series to be certain that loss through the tube was minimized. Comparability between methods is good. A U.S, Company ran side-by-side area samples between the #3500 and a standard charcoal tube. The range of concentrations found were ron nondetectable to over 90 ppm, with an average of 7.89 ppm. A high degree of correlation exists between the 79 pairs of sample data. Laboratory and field testing was performed on the subject gases. Field data was taken in both unoccupied and occupied operating rooms. Known quantities of MMA were generated in a laboratory chamber. Lab precision tuts are shown, plus the Side-by-side comparison of standard charcoal tube vs. the #3500 in personal field samples. 3M 109664 3500 LABORATORY & FIELD TEST EVALUATIONS TABLE OF CONTENTS I. Laboratory Evaluations Compound(s) a. Toluene Evaluator Krtazato University, Japan b. Toluene and Toluene Technical Research Center of mixture with iso Butanol, Finland Acetone, and Perchloroethylene c, Styrene/Acetone mixture Jutlandish Institute of Technology, Denmark d. Vinyl Chloride Chemical Ccmpany (anonymous) Summary Pour levels from 10-200 ppm were generated in a test chamber and monitors exposed to these concentrations over varying time intervals. The center ran controlled laboratory comparisons of the #3500 vs, standard charcoal tubes and low flow pumpa. The compounds studied were Toluene, a mixture of Toluene and Iso Butyl Alcohol, Acetone, and Perchloroethylene. Chamber concentrations were checked by Micron LA infrared and by direct GC analysis. The Jutlandish Institute of Technology in Denmark performed a laboratory comparison of a Styrene and Acetone mixture Using #3500 OVM and $KC standard charcoal tubes. Low flow pumps were used for the SKC tubes and both systems were exposed for four hours. An airstream containing 0.61 ppn of Vc was passed over the #3500 for fifteen minutes at two liters per minute. Relative Precision at 95% confidence level was 15% for the #3500 and 114% for the tube. e. Dichloromethane, l, 2 Dichloroethane, Tetrachloroethylene, Heptane f, Ehflurane 3M OH & SP Division tt Field Evaluations Compound(s) a. Complex Mixtures Ketones and Chlorinated Hydrocarbons b. Benzene, Toluene Xylene in complex mixtures Evaluator chaK*` C_Omp"y (anonymous) .* Oil Ccmpany , (anonymous) g. Benzene, Toluene Chemical Company (anonymous) d. 1, 1, 2 Trichloroethylene e. Acetone 3M Industrial Hymans Department Chemical company (anonymous) f. Benzene ,_ Steel Company (anonymous) III. Lah/Field Evaluations Compound(s) a, Halothane Enflurane b. Methyl Methacrylate R-3SLFT-A Evaluator U. $. Army Environmental Hygiene Agency Chemical Company (anonymous) Data show that the #3500 is gas tight. This data is valid in its conclusions only when the compound is stable. The data relates storage time to recovery coefficients (Desorption Efficiency). A study at an eastern U.5. university was carried out comparing the #3500, Miran 1A, and Charcoal Tube (c.T.) to a known concentration in an exposure chamber. The #3500 correlated well with the tank concentration and had excellent coefficient of variance. A^hfaierclod.lc\oumLpareisnodnthweas#c3o50n0dutcotede cbect^wleee*n a 60*0,m.g. agreement is good for all cases except acetone, where lt appears the #3500 samples are high. An explanation is given. a major oil ccmpany ran extensive side-by-side comparative studies of standard charcoal tubes and the #3500, Thirty samples were taken for Benzene, Toluene, and Xylene. These compounds were present together in a complex mixture of hydrocarbons. A U.S. chemical company ran side-by-side personal exposures with the #3500 and standard charcoal tubes. Benzene and Toluene were both present in the air. Personal samples were run in a M plant. samples were run for four hours and converted to TLV-TWA. correlation was good between the two methods. Three separate methods of measuring acetone m a field area sample were used. The 600 mg. tubes were used in series to be certain that loss through the tube was minimized. Comparability between methods is good. a u S. Company ran side-by-side area samples ... . between the #3500 and a standard charcoal tube, The range of concentrations found were from non- detectable to over 90 ppn, with an average of 7.89 ppm. A high degree of correlation exists between the 79 pairs of sample data. Laboratory and field testing was performod on the subject gases. Field data was taken in both unoccupied and occupied operating rooms. Known quantities of MMA were generated m a laboratory chamber. Lab precision tests are shown, plus the side-by-side comparison of standard charcoal tube vs. the #3500 in personal field samples. 3H 109665 3500 LABORATORY 8 FIELD TEST EVALUATIONS TABLE OF CONTENTS I. Laboratory Evaluations Compound(a) a. Toluene Evaluator Kitazato University, Japan b. Toluene and Toluene Technical Research Center of mixture with Iso Butanol, Finland Acetone, and Perchloroethylene c. Styrene/Acetone mixture Jutlandish institute of Technology, Denmark d. Vinyl Chloride Chemical Company (anonynxjus) Suiimarv Four levels from 10-200 ppm were generated in a test chamber and monitors exposed to these concentrations over varying time intervals. The Center ran controlled laboratory comparisons of the #3500 vs. standard charcoal tubes and low flow pumps. The compounds studied were Toluene, a mixture of Toluene and iso Butyl Alcohol, Acetone, and Perchloroethylene. Chamber concentrations were checked by Micron IA infrared and by direct GC analysis. The Jutlandish institute of Technology in Denmark performed a laboratory comparison of a Styrene and Acetone mixture Using #3500 OVM and SKC Standard charcoal tubes. Low flow pumps were used for the SKC tubes and both systems were exposed for four hours. An airstream containing 0,61 ppm of VC was passed over the #3500 for fifteen minutes at two liters per minute. Relative Precision at 95% confidence level was 15% for the #3500 and 114% for the tube. e. Dichloromethane, 1, 2 Dichloroethane, Tetrachloroethylene, Heptane f, Enflurane 3M OH & sp Division H,, yield Evaluations compound(B) a. Complex Mixtures Ketones and chlorinated Hydrocarbons Evaluator chemical Company (anonymous) b. Benzene, Toluene Xylene in complex mixtures Oil Company (anonymous) c. Benzene, Toluene Chemical company (anonymous) d. 1, 1, 2 Trichloroethylene e. Acetone 3M Industrial Hygiehe Department Chemical Company (anonymous) f. Benzene Steel Company (anonymous) XXI. Lab/Fleld Evaluations compound(s) a. Halothane Enflurane b. Methyl Methacrylate R-35LFT-A Evaluator U, 5, Army Environmental Hygiene Agency Chemical Company (anonymous) Data show that the #3500 ig gas tight. This data is valid in its conclusions only when the compound is stable. The data relates storage time to recovery coefficients (Desorption Efficiency). A study at an eastern U.S. university was carried out comparing the #3500, Miran IA, and Charcoal Tube (C.T.) to a known concentration in an exposure chamber. The #3500 correlated well with the tank concentration and had excellent coefficient of variance. A field comparison was conducted between a 600 mg. charcoal tube and the #3500 in a complex mixture, hgreemeht is good for all cases except acetone, where it appears the #3500 samples are high. An explanation is given, A major oil company ran extensive side-by-side comparative studies of standard charcoal tubes and the #3500, Thirty samples were taken for Benzene, Toluene, and Xylene. These compounds were present together in a complex mixture of hydrocarbons, A U.S. chemical company ran side-by-side personal exposures with the #3500 and standard charcoal tubes. Benzene and Toluene were both present in the air. Personal samples were run in a 3M plant. Samples were run for four hours and converted to TLV-TWA, Correlation was good between the two methods. Three separate methods of measuring acetone in a field area sample were UBed. The 600 mg, tubes were used in series to be certain that loss through the tube was minimized. Comparability between methods is good. A U.S. Company ran side-by-side area samples between the #3500 and a standard charcoal tube. The range of concentrations found were fTcTM nondetectable to over 90 ppro, with an average of 7.89 ppm. A high degree of correlation exists between the 79 pairs of sample data. Laboratory and field testing was performed on the subject gases. Field data was taken in both unoccupied and occupied operating rooms. Known quantities of MMA were generated in a laboratory chamber. Lab precision tests are shown, plus the side-by-side comparison of standard charcoal tube vs. the #3500 in personal field samples. 3M 109666 3500 LABORATORY & FIELD TEST EVALUATIONS TABLE OF CONTENTS / I, laboratory Evaluations Ctx&oound(s) a. Toluene Evaluator Kitazato University, Japan b. Toluene and Toluene Technical Research Center of mixture with Iso Butanol* Finland Acetone, ,and Perc hioroethy1 e ne c. Styrene/Acetone mixture Jutlandish Institute of Technology, Denmark d. Vinyl Chloride Chemical Company (anonymous) Summary Four levels from 10-200 ppm were generated in a test chamber and monitors exposed to these concentrations over varying time intervals. The Center ran controlled laboratory comparisons of the #3500 vs. standard charcoal tubes and low flow pumps. The compounds studied were Toluene, a mixture of Toluene and Iso Butyl Alcohol, Acetone, and Perchloroethylene. Chamber concentrations were checked by Micron 1A infrared and by direct GC analysis. The Jutlandish Institute of Technology in Denmark performed a laboratory comparison of a Styrene and Acetone mixture using #3500 OVM and $KC standard charcoal tubes. Low flow pomps were used for the 5KC tubes and both systems were exposed for four hours. An airstream containing 0.61 ppm of vc was passed over the #3500 for fifteen minutes at two liters per minute. Relative Precision at 95% confidence level was 15% for the #3500 and 114% for the tube. e. Dichloromethane, 1, 2 Dichloroethane, Tetrachloroethylene, Heptane 3M OH s SP Division Data show that the #3500 is gas tight. This data is valid in its conclusions only when the compound is stable. The data relates storage time to recovery coefficients (Desorption Efficiency). f. Enflurane A study at an eastern U.S. university was carried out comparing the #3500, Miran IA, and Charcoal Tube (C.T.) to a known concentration in an exposure chamber. The #3500 correlated well with the tank concentration and had excellent coefficient of variance. tt. Field Evaluations Compound(s) a. Complex Mixtures Ketones and Chlorinated Hydrocarbons b. Benzene, Toluene Xylene in complex mixtures c. Benzene, Toluene d. 1, l, 2 Trichloroethylene e. Acetone f. Benzene Evaluator ,. Chemical Py A field comparison was conducted between a 600 mg. charcoal tube and the #3500 in a complex mixture. ____________Agreement Is good for all cases except acetone, (anonymou whera lt appears the #3500 samples are high. An explanation is given. i rTM. 0i ^ y , (anonymou ) A major oil conpany ran extensive side-by-side comparative studies of standard charcoal tubes and the #3500. Thirty samples were taken for Benzene, Toluene, and xylene. These compounds were present together in a complex mixture of hydrocarbons, Chemical Company (anonymous) A U.S. chemical company ran side-by-side personal exposures With the #3500 and standard charcoal tubes. Benzene and Toluene were both present in the air. 3M industrial Hygiene Department Personal samples were run in a 3M plant. samples were run for four hours and converted to TLV-TWA. Correlation was good between the two methods. Chemical Company (anonymous) Three separate methods of measuring acetone in a field area sample were used. The 600 mg. tubes were used in series to be certain that loss through the tube was minimized. Comparability between methods is good. Steel Company , (anonymous) A U.S. Company ran side-by-side area samples between the #3500 and a standard charcoal tube, The range of concentrations found were fre non- detectable to over 90 ppm, with an average of 7,89 ppm. A high degree of correlation exists between the 79 pairs of sample data. III. Lab/Field Evaluations Compound(s) Evaluator a. Halothane Enflurane b. Methyl Methacrylate R-35LFT-A U. S. Army Environmental Hygiene Agency Chemical Company (anonymous) Laboratory and field testing was performed on the subject gases. Field data was taken in both unoccupied and occupied operating rooms. Known quantities of MMa were generated m a laboratory chamber. Lab precision tests are shown, plus the side-by-side comparison of standard charcoal tube vs. the #3500 in personal field samples. 3M 109667 3500 LABORATORY FIELD TEST EVALUATIONS TABLE OF CONTENTS I. laboratory Evaluations Compound(s) a. Toluene Evaluator Kitazato University, Japan b. Toluene and Toluene Technical Research Center of mixture with iso Butanol, Finland Acetone, and Parehloroe thyle ne c, Etyrene/Acetone mixture Jutlandish Institute of Technology, Denmark d. Vinyl Chloride Chemical Company (anonymous) Summary Four levels from 10-200 ppn were generated in a test chamber and monitors exposed to these concentrations over varying time intervals. The center ran controlled laboratory comparisons of the #3500 vs. standard charcoal tubes and low flow pumps. The compounds studied were Toluene, a mixture of Toluene and Iso Butyl Alcohol, Acetone, and Perchloroethylene. Chamber concentrations were checked by Micron IA infrared and by direct GC analysis. The JUtlandish Institute of Technoloqy in Denmark performed a laboratory comparison of a Styrene and Acetone mixture using #3500 OVM and SKC Standard charcoal tubes. Low flow pumps were used for the SKC tubes and both systems were exposed for four hours. An airstream containing 0.61 ppm of VC was passed over the #3500 for fifteen minutes at two liters per minute. Relative Precision at 95% confidence level was 15% for the #3500 and 114% for the tube. e. Dichloromethane, 1, 2 Dichloroethane, Tetrachloroethylene, Heptane f, Enflurane 3M OH & SP Division TT Field Evaluations Compound(s) a. Complex Mixtures Ketones and Chlorinated Hydrocarbons b. Benzene, Toluene Xylene in ccmplex mixtures Evaluator 1 Chemical company (anonymous) _ i TM,v Oil Ctxnpany (anonymous) c. Benzene, Toluene Chemical Company (anonymous) d, 1, 1, 2 Trichloroethylene e. Acetone 3M industrial Hygiene Department Chemical Company (anonymous) f. Benzene stsel company . (anonymous) III. Lab/Field Evaluations Compound(s) a. Halothane Enflurane b. Methyl Methacrylate R-35LFT-A Evaluator U. S. Army Environmental Hygiene Agency Chemical Company (anonymous) Data show that the #3500 is gag tight. This data is valid In its conclusions only when the compound is stable. The data relates storage time to recovery coefficients (Desorption Efficiency). A study at an eastern U.S, university was carried out comparing the #3500, Miran IA, and Charcoal Tube (C,T.) to a known concentration in an exposure chamber. The #3500 correlated well with the tank concentration and had excellent coefficient of variance. A field comparison was conducts*! between a 600 mg. charcoal tube and the #3500 In a ccmplex mixture. Agreement is good for all cases except acetone, where It appears the #3500 samples are hrgh. An explanation is given. A maior oil ccmpany ran extensive aide-by-side comparative studies of standard charcoal tubes and the #3500. Thirty samples were taken for Benzene, Toluene, and Xylene. These compounds were present together in a ccmplex mixture of hydrocarbons. * U.S. chemical company ran side-by-side personal exposures with the #3500 and standard charcoal tubes. Benzene and Toluene were both present in the air. Personal samples were run in a 3M plant. Samples were run for four hours and converted to TLV-TWA. correlation was good between the two methods. Three separate methods of measuring acetone in a field area Bample were used. The 600 mg. tubes were used in series to be certain that loss through the tube was minimized. Comparability between methods is good. A U.S. Company ran side-by-side area samples between the #3500 and a standard charcoal tube, The range of concentrations found were from nondetectable to over 90 ppm, with an average of 7.89 P*. A high degree of correlation exists between the 79 pairs of sample data. Laboratory and field testing was performed on the subject gases, fipld data was taken in both unoccupied and occupied operating rooms. Known quantities of MMA were generated in a laboratory chamber. Lab precision tests are shown, plus the side-by-side comparison of standard charcoal tube vs. the #3500 in personal field samples. 3W J0966S 3500 LABORATORY S FIELD TEST EVALUATIONS TABLE OF CONTENTS I. Laboratory Evaluations Compound(a) a. Toluene Evaluator Kitazato university, Japan b. Toluene and Toluene Technical Research Center mixture with Iso Butanol, Finland Acetone, and Rerchloroethylene c Styrene/Acetone mixture Jutlandish Institute of Technology, Denmark d. Vinyl Chloride chemical Company (anonymous) Summary Four levels from 10-200 ppm were generated in a test chamber and monitors exposed to these concentrations over varying time intervale. The Center ran controlled laboratory comparisons of the #3500 vs. standard charcoal tubes and low flow pumps. The compounds studied were Toluene, a mixture of Toluene and Iso Butyl Alcohol, Acetone, and Perchloroethylene, Chamber concentrations were checked by Micron IA infrared and by direct GC analysis. The Jutlandish Institute of Technology in Denmark performed a laboratory comparison of a styrene and Acetone mixture using #3500 OVM and SKC standard charcoal tubes. Low flow pumps were used for the SKC tubes and both systems were exposed for four hours. An airstream containing 0.61 ppm of vc was passed over the #3500 for fifteen minutes at two liters per minute. Relative Precision at 95% confidence level was 15% for the #3500 and 114% for the tube. e. Dichloromethane, 1, 2 Dichloroethane, Tetrachloroethylene, Heptane f, Enflurane 3 On 4 SP Division II. Field Evaluations Compound(s) a. Complex Mixtures Ketones and Chlorinated Hydrocarbons Evaluator chemical Company (anonymous) b. Benzene, Toluene Xylene in ctmiplex mixtures Oil Company (anonymous) c. Benzene, Toluene Chemical Company (anonymous) d. 1, 1, 2 Trichloroethylene e. Acetone 3M industrial Hygiene Department chemical company (anonymous) , Benzene steel company (anonymous) III. Lab/Pield Evaluations Compound(s) a. Halothane Enflurane b. Methyl Methacrylate R-35LFT-A Evaluator u. s. Army Environmental Hygiene Agency Chemical Company (anonymous) Data show Chat the #3500 is gas tight. This data is valid in its conclusions only when the compound is stable. The data relates storage time to recovery coefficients (Desorption Efficiency), A study at an eastern U.S. university was carried out comparing the #3500, Miran IA, and charcoal Tube (C.T.) to a known concentration in an exposure chamber. The #3500 correlated well with the tank concentration and had excellent coefficient of vanarce. a field comparison was conducted between a 600 mg. charcoal tube and the #3500 in a complex mixture. Agreement is good fox all cases except acetone, where it appears the #3500 samples are high. An explanation is given, A major oil conpany ran extensive side-by-side comparative studies of standard charcoal tubes and the #3500. Thirty samples were taken for Benzene, Toluene, and Xylene. These compounds were present together in a complex mixture of hydrocarbons. A U*S. chemical company ran side-by-side personal exposures with the #3500 and standard charcoal tubes. Benzene and Toluene were both present in the air. Personal samples were run in a 3M plant. Samples were run for four hours and converted to TLV-TWA. CorreLation was good between the two methods. Three separate methods of measuring acetone in a field area sample were used. The 600 mg. tubes were used in series to be certain that loss through the tube was minimized. Comparability between methods is good. A u.S. Company ran side-by-side area samples between the #3500 and a standard charcoal tube. The range of concentrations found were from nondetectable to over 90 ppm, with an average of 7.89 ppan. A high degree of correlation exists between the 79 pairs of sample data. Laboratory and field testing was performed on the subject gases. Field data was taken in both unoccupied and occupied operating rooms. Known quantities of MMA were generated in a laboratory chamber. Lab precision tests are shown, plus the side-by-side comparison of standard charcoal tube vs. the #3500 in personal field samples. 3H 109669 3500 LABORATORY & FIELD TEST EVALUATIONS TABLE OF CONTENTS I. laboratory Evaluations Compound(g) a. Toluene Evaluator Kitazato University, Japan b. Toluene and Toluene Technical Research Center of mixture with ISO Butanol, Finland Acetone, and Perchloroethylene C. Styrene/AcetOne mixture Outlandish Institute of Technology, Denmark d. Vinyl Chloride Chemical Company (anonymous) Summary Four levels from 10-200 ppm were generated in a test chamber and monitors exposed to these concentrations over varying time intervals. The Center ran controlled laboratory comparisons of the #3500 vs. standard charcoal tubes and low flow pumps. The compounds studied were Toluene, a mixture of Toluene and iso Butyl Alcohol, Acetone, and Perchloroethylene. chamber concentrations were checked by Micron IA infrared and by direct <3C analysis. The Jutlandish Institute of Technology m Denmark performed a laboratory comparison of a Styrene and Acetone mixture using #3500 OVM and SKC standard charcoal tubes. Low flow pumps were used for the SKC tubes and both systems were exposed for four hours. An airstream containing 0.61 ppm of VC was passed over the #3500 for fifteen minutes at two liters per minute. Relative Precision at 95% confidence level was 15% for the #3500 and 114% for the tube. e. Dichloromethane, 1, 2 Dichloroethane, Tetrachloroethylene, Heptane f. Enflurane 3M Oh & SP Division II. Field Evaluations Compound(s) a. Complex Mixtures Ketones and chlorinated Hydrocarbons Evaluator chemical company (anonymous) b. Benzene, Toluene Xylene in complex mixtures oil company (anonymous) c. Benzene, Toluene Chemical Company (anonymous) d. 1, 1, 2 Trichloroethylene e. Acetone 3H Industrial Hygiene Department chemical Company (anonymous) f. Benzene Steel Company (anonymous) III. Lab/Field Evaluations Compound(s) a. Halothane Enflurane b. Methyl MethacryLate R-35LFT-A Evaluator U. $. Army Environmental Hygiene Agency Chemical Company (anonymous) Data show that the #3500 IS gag tight. This data is valid in its conclusions only when the compound is stable. The data relates storage time to recovery coefficients (Desorption Efficiency). A study at an eastern U.S. university was earned out comparing the #3500, Miran IA, and Charcoal Tube (C.T.) to a known concentration in an exposure chamber. The #3500 correlated well with the tank concentration and had excellent coefficient of variance. A field comparison was conducted between a 600 mg, charcoal tube and the #3500 in a cemplex mixture. Agreement is good for all cases except acetone, where it appears the #3500 samples are high. An explanation is given. A major oil company ran extensive side-by-side comparative studies of standard charcoal tubes and the #3500. Thirty samples were taken for Benzene, Toluene, and Xylene. These compounds were present together m a complex mixture of hydrocarbons. A U.S. chemical company ran side-by-side personal exposures with the #3500 and standard charcoal tubes. Benzene and Toluene were both present In the air. Personal samples were run in a 3M plant. Samples were run for four hours and converted to TLV-TWA. Correlation was good between the two methods. Three separate methods of measuring acetone m a field area sample were used. The 600 mg, tubes were used in series to be certain that loss through the tube was minimized. Comparability between methods is good. A U.S. company ran side-by-side area samples between the #3500 and a standard charcoal tube.^ The range of concentrations found were ftc*1 non" detectable to over 90 ppm, with an avetaqe of 7.89 ppm. A high degree of correlation exists between the 79 pairs of Bample data. Laboratory and field testing was performed on the subject gases. Field data was taken in both unoccupied and occupied operating rooms. Known quantities of MMA were generated in a laboratory chamber, tab precision tests are shown, plus the side-by-side comparison of standard charcoal tube vs. the #3500 in personal field samples. 3H 109670