OCR Text |
Show Appendix 33 Study- unit frequency of detection, in percent National frequency of detection in percent 1 Study- unit sample size 100 74 40 7 35 i ~ i r Methylbenzene ( Toluene) • •••*• \; r(?.$$& ™ *~*..- f^ 7f.-• 8 16 • •• Tetrachloroethene ( Perchloroethene) 60 50 --^ B-- I 53 11 18 28 13 f Trichloromethane ( Chloroform) 92 60 -- 31 90 49 2 6 30 ••-' . » >- •• • « w » nwn • » - * m - ; ;;;,;. ; 1 25 0 30 53 25 0 30 53 25 0 30 53 0.001 0.01 0.1 1 10 100 1,000 10,000 CONCENTRATION, IN MICROGRAMS PER LITER Other VOCs detected Acetone ( Acetone) * ** Bromodichloromethane ( Dichlorobromomethane) ** 2- Butanone ( Methyl ethyl ketone ( MEK)) ** Carbon disulfide * ** Chloromethane ( Methyl chloride) ** Dibromochloromethane ( Chlorodibromomethane) ** 1,4- Dichlorobenzene ( p- Dichlorobenzene, 1,4- DCB) Dichlorodifluoromethane ( CFC 12, Freon 12) ** 1,2- Dichloroethane ( Ethylene dichloride) 1,1- Dichloroethane ( Ethylidene dichloride) * ** 1,1- Dichloroethene ( Vinylidene chloride) ** c/ s- 1,2- Dichloroethene (( Z)- 1,2- Dichloroethene) ** Dichloromethane ( Methylene chloride) 1,2- Dimethylbenzene ( o- Xylene) ** Ethenylbenzene ( Styrene) ** Ethylbenzene ( Phenylethane) 2- Ethyltoluene ( o- Ethyltoluene) * ** Isopropylbenzene ( Cumene) * ** p- lsopropyltoluene ( p- Cymene, 1- lsopropyl- 4- methylbenzene) * ** Methyl ferf- butyl ether ( MTBE) ** 4- Methyl- 2- pentanone ( Methyl isobutyl ketone ( MIBK)) * ** Tetrachloromethane ( Carbon tetrachloride) Tribromomethane ( Bromoform) ** 1,1,2- Trictiloro- 1,2,2- trifluoroethane ( Freon 113, CFC 113)*** 1,1,1- Trichloroethane ( Methylchloroform) ** Trichloroethene ( TCE) Trichlorofluoromethane ( CFC 11, Freon 11) ** 1,2,3- Trimethylbenzene ( Hemimellitene) * ** 1,2,4- Trimethylbenzene ( Pseudocumene) * ** 1,3,5- Trimethylbenzene ( Mesitylene) * ** sec- Butylbenzene (( l- Methylpropyl) benzene) * ** fert- Butylbenzene (( 1,1- Dimethylethyl) benzene) * ** 3- Chloro- 1- propene ( 3- Chloropropene) * ** 1 - Chloro- 2- methylbenzene ( c- Chlorotoluene) ** 1- Chloro- 4- methylbenzene ( p- Chlorotoluene) ** Chlorobenzene ( Monochlorobenzene) Chloroethane ( Ethyl chloride) * ** Chloroethene ( Vinyl chloride) ** 1,2- Dibromo- 3- chloroproparie ( DBCR Nemagon) ** 1,2- Dibromoethane ( Ethylene dibromide, EDB) ** Dibromomethane ( Methylene dibromide) * ** frans- 1,4- Dichloro- 2- butene (( Z)- 1,4- Dichloro- 2- butene) * ** 1,3- Dichlorobenzene ( m- Dichlorobenzene) frans- 1,2- Dichloroethene (( E)- 1,2- Dichlorothene) ** 1,2- Dichloropropane ( Propylene dichloride) ** 2,2- Dichloropropane * ** 1,3- Dichloropropane ( Trimethylene dichloride) * ** frans- 1,3- Dichloropropene (( E)- 1,3- Dichloropropene) ** c/ s- 1,3- Dichloropropene (( Z)- 1,3- Dichloropropene) ** 1,1 - Dichloropropene * ** Diethyl ether ( Ethyl ether) * ** Diisopropyl ether ( Diisopropylether ( DIPE)) * ** Ethyl methacrylate ( Ethyl methacrylate) * ** Ethyl ferf- butyl ether ( Ethyl- t- butyl ether ( ETBE)) * ** 1,1,2,3,4,4- Hexachloro- 1,3- butadiene ( Hexachlorobutadiene) 1,1,1,2,2,2- Hexachloroethane ( Hexachloroethane) ** 2- Hexanone ( Methyl butyl ketone ( MBK)) * ** lodomethane ( Methyl iodide) * ** Methyl acrylonitrile ( Methacrylonitrile) * ** Methyl methacrylate ( Methyl- 2- methacrylate) * ** Methyl- 2- propenoate ( Methyl Acrylate) * ** Naphthalene 2- Propenenitrile ( Acrylonitrile) ** n- Propylbenzene ( Isocumene) * ** 1,1,2,2- Tetrachloroethane ** 1,1,1,2- Tetrachloroethane ( 1,1,1,2- TeCA) ** Tetrahydrofuran ( Diethylene oxide) * ** 1,2,3,4- Tetramethylbenzene ( Prehnitene) * ** 1,2,3,5- Tetramethylbenzene ( Isodurene) * ** 1,2,4- Trichlorobenzene 1,2,3- Trichlorobenzene ( 1,2,3- TCB) * 1,1,2- Trichloroethane ( Vinyl trichloride) ** 1,2,3- Trichloropropane ( Allyl trichloride) ** ferf- Amyl methyl ether ( TAME) * ** Nutrients in water Study- unit frequency of detection, in percent National frequency of detection, in percent I 1 1 11 Study- unit sample size Orthophosphate as P * 100 84' 63 72 •• 95 79 90 95 55 53 63 • i- • » » •• » Ammonia 62 80 54 82 88 78 1 29 70 95 0 30 55 29 70 95 VOCs not detected Bromobenzene ( Phenyl bromide) * ** Bromochloromethane ( Methylene chlorobromide) Bromoethene ( Vinyl bromide) * ** Bromomethane ( Methyl bromide) ** n- Butylbenzene ( 1- Phenylbutane) * ** 23 47 72 61 60 0 30 55 0.01 0.1 1 10 CONCENTRATION, IN MILLIGRAMS PER LITER |