CFR / Title 46 / Part 151 / Sec. 151.05-2 Compliance with requirements for tank barges carrying

A tank barge certificated to carry benzene and benzene containing cargoes or butyl acrylate cargoes must comply with the gauging requirement of Table 151.05 of this part by August 15, 1998. Until that date, a tank barge certificated to carry benzene and benzene containing cargoes must meet either the gauging requirement of Table 151.05 or the restricted or closed gauging requirements in effect on September 29, 1994; and a tank barge certificated to carry butyl acrylate cargoes must meet either the gauging requirements of Table 151.05 or comply with the open, restricted, or closed gauging requirements in effect on September 29, 1994. [CGD 95-900, 60 FR 34050, June 29, 1995]

Table 151.05 to Subpart 151.05 of Part 151--Summary of Minimum

Requirements ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Cargo identification\1\ Tanks Cargo transfer Environmental-------------------------------------------------------- Cargo --------------------------------------------------------------- control Electrical

Hull segre- --------------------- Fire Special requirements in hazard Temp. Tank internal

type gation Gauging Piping Cargo protection 46 CFR Part 151 class and control inspect.

Cargo name Pressure Temp. tank Type Vent device class Control Cargo handling required group install. period--years

tanks space----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------a. b. c. d. e. f....................... g. h. i. j. k. l. m. n....................... o. p. q.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetaldehyde.......................... Press. Amb. II 1NA Ind. Pressure........... SR Restr. II P-1 Inert Vent F Yes .55-1(h)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetic acid........................... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .50-73.................. I-D NA G

2 i i .55-1(g)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetic anhydride...................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-73.................. I-D NA G

2 i i .55-1(g)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetone cyanohydrin................... Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-D NA G

2 i .50-70(b)...............

.50-73..................

.50-81..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acetonitrile.......................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acrylic acid.......................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-73..................

.50-81..................

.58-1(a)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Acrylonitrile......................... Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .55-1(e)................ I-D NA G

2 i i .50-70(a)...............----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Adiponitrile.......................... Atmos. Amb. II 1 i i Integral Gravity........ PV Open II G-1 NR Vent F Yes No...................... I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Alkylbenzenesulfonic acid (greater Atmos. Elev. III 1 i i Integral Gravity........ Open Open II G-1 NR Vent N Yes .50-73.................. I-B NA G

than 4%). 2 i i .58-1(e)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Alkyl(C7-C9) nitrates................. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .50-81.................. NA NA G

2 i i .50-86..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Allyl alcohol......................... Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-C NA G

Allyl chloride........................ Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Aluminum sulfate solution............. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .58-1(e)................ NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Aminoethylethanolamine................ Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(b)................ NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ammonia, anhydrous.................... Press. Amb. II 1NA Ind. Pressure........... SR250 Restr. II P-2 NR Vent F No .50-30.................. I-D NA G

2 i i p.s.i. .50-32..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ammonia, anhydrous.................... Atmos. Low II 1NA Ind. Gravity............ PV Restr. II-L G-2 NR Vent F No .50-30.................. I-D .40- 8

2 i i .50-32.................. 1(b)(1)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ammonium bisulfite solution (70% or Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N No .50-73.................. NA NA G

less). 2 i .56-1(a), (b), (c)......----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ammonium hydroxide (28% or less NH 3). Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F No .56-1(a), (b), (c), (f), I-D NA G

2 i (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Aniline............................... Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-D NA G

2 i i .50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Anthracene oil (Coal tar fraction).... Atmos. Amb. II 1 i i Integral Gravity........ Open Open II G-1 NR Vent N Yes No...................... I-D NA G

Elev. 2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Argon, liquefied...................... Press. Low III 1NA Ind. Pressure........... SR Restr. II-L P-1 NR Vent F No .40-1(a)................ NA .40-1(a) G

2 i .50-30..................

.50-36..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Benzene............................... Atmos. Amb. III 1 i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .50-60.................. I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Benzene hydrocarbon mixtures Atmos. Amb. III 1 i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .50-60.................. I-D NA G

(containing Acetylenes) (having 10% 2 i i .56-1(b), (d), (f), (g),

Benzene or more).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Benzene hydrocarbon mixtures (having Atmos. Amb. III 1 i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .50-60.................. I-D NA G

10% Benzene or more). 2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Benzene, Toluene, Xylene mixtures Atmos. Amb. III 1 i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .50-60.................. I-D NA G

(having 10% Benzene or more). 2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butadiene............................. Press. Amb. II 1NA Ind. Pressure........... SR Restr. II P-2 NR Vent F Yes .50-70(a)............... I-B NA G

2 i i .50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butadiene, Butylene mixtures Press. Amb. II 1NA Ind. Pressure........... SR Restr. II P-1 NR Vent F Yes .50-30.................. I-B NA G

(containing Acetylenes). 2 i i .50-70(a)...............

.50-73..................

.56-1(b), (d), (f), (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butyl acrylate (all isomers).......... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butylamine (all isomers).............. Atmos. Amb. II 1 i i Ind. Gravity............ PV Closed II G-1 NR Vent F Yes .55-1(c)................ I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butyl methacrylate.................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Butyraldehyde (all isomers)........... Atmos. Amb. III 1 i Integral Gravity........ PV Open II G-1 NR Vent F Yes .55-1(h)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Camphor oil (light)................... Atmos. Amb. II 1 i i Integral Gravity........ Open Open II G-1 NR Vent N Yes No...................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Carbolic oil.......................... Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... NA NA G

2 i i .50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Carbon dioxide, liquefied............. Press. Low III 1NA Ind. Pressure........... SR Restr. I-L P-1 NR Vent F No .50-30.................. NA .40- G

2 i 1(b)(1)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Carbon disulfide...................... Atmos. Amb. II 1NA Ind. Gravity............ PV Restr. II G-1 Inert Vent F Yes .50-40.................. I-A NA G

2 i i .50-41..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Carbon tetrachloride.................. Atmos. Amb. III 1 i Integral Gravity........ PV Open II G-1 NR Vent N No No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cashew nut shell oil (untreated)...... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-2 NR Vent N Yes .50-73.................. NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Caustic potash solution............... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR NR No .50-73.................. NA NA G

Elev. 2 i .55-1(j)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Caustic soda solution................. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR NR No .50-73.................. NA NA G

Elev. 2 i .55-1(j)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chlorine.............................. Press. Amb. I 1NA Ind. Pressure........... SR300 Indirect I P-2 NR Vent F No .50-30.................. NA NA 3

2 i i p.s.i. .50-31..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chlorobenzene......................... Atmos. Amb. III 1 i Integral Gravity........ PV Open II G-1 NR Vent N Yes No...................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chloroform............................ Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent F No No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chlorohydrins (crude)................. Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------o-Chloronitrobenzene.................. Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... NA NA G

2 i i .50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Chlorosulfonic acid................... Atmos. Amb. III 1 i i Integral Gravity........ PV Open II G-1 NR Vent N No .50-20.................. I-B NA G

2 i i .50-21..................

.50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Coal tar naphtha solvent.............. Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-73.................. I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Coal tar pitch (molten)............... Atmos. Elev. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-73.................. I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Creosote.............................. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cresols (all isomers)................. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes No...................... NA NA G

Cresols (all isomers).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cresols with 5% or more Phenol, see

Phenol.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Cresylate spent caustic............... Atmos. Amb. III 1 i i Integral Gravity........ Open Open II G-1 NR Vent N No .50-73.................. NA NA G

2 i .55-1(b)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cresylic acid, sodium salt solution,

see Cresylate spent caustic.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Crotonaldehyde........................ Atmos. Amb. II 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(h)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cyclohexanone......................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .56-1(a), (b)........... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cyclohexanone, Cyclohexanol mixture... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .56-1(b)................ I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cyclohexylamine....................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .56-1(a), (b), (c), (g). I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Cyclopentadiene, Styrene, Benzene Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent F Yes .50-60.................. I-D NA G

mixture. 2 i i .56-1(b)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------iso-Decyl acrylate.................... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .50-70(a)............... NA NA G

2 i .50-81(a), (b)..........

.55-1(c)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dichlorobenzene (all isomers)......... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .56-1(a), (b)........... I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dichlorodifluoromethane............... Press. Amb. III 1NA Ind. Pressure........... SR Restr. II P-1 NR NR No No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,1-Dichloroethane.................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

2,2'-Dichloroethyl ether.............. Atmos. Amb. II 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(f)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dichloromethane....................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F No No...................... I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2,4-Dichlorophenoxy acetic acid, Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N No .56-1(a), (b), (c), (g). NA NA G

diethanolamine salt solution. 2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2,4-Dichlorophenoxyacetic acid, Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F No .56-1(a), (b), (c), (g). NA NA G

dimethylamine salt solution. Elev. 2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2,4-Dichlorophenoxyacetic acid, Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N No .56-1(a), (b), (c), (g). NA NA G

triisopropanolamine salt solution. 2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,1-Dichloropropane................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,2-Dichloropropane................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,3-Dichloropropane................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,3-Dichloropropene................... Atmos. Amb. II 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dichloropropene, Dichloropropane Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F Yes No...................... I-D NA G

mixtures. 2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2,2-Dichloropropionic acid............ Atmos. Amb. II 1 i i Integral Gravity........ PV Restr. II G-1 Dry Vent F Yes .50-73.................. NA NA G

2 i .58-1(e)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diethanolamine........................ Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(c)................ NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diethylamine.......................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(c)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diethylenetriamine.................... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(c)................ NA NA G

Diethyl ether, see Ethyl ether........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diisobutylamine....................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(c)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diisopropanolamine.................... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(c)................ NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diisopropylamine...................... Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .55-1(c)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------N,N-Dimethylacetamide................. Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .56-1(b)................ I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dimethylamine......................... Press. Amb. II 1NA Ind. Pressure........... SR Restr. II P-2 NR Vent F Yes .55-1(c)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dimethylethanolamine.................. Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .56-1(b), (c)........... I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dimethylformamide..................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(e)................ I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,4-Dioxane........................... Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 Inert Vent F Yes No...................... I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Diphenylmethane diisocyanate.......... Atmos. Elev. II 1 i i Integral Gravity........ PV Closed I G-1 Inert Vent F Yes .50-5................... NA Yes G

2 i Dry .56-1(a), (b)...........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Di-n-propylamine...................... Atmos. Amb. II 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(c)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dodecyl- dimethyl- amine, Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .56-1(b)................ NA NA G

Tetradecyldimethylamine mixture. 2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Dodecyl phenol........................ Atmos. Amb. I 1 i i Integral Gravity........ Open Open II G-1 NR Vent N Yes .50-73.................. I-D NA 2

Epichlorohydrin....................... Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethanolamine.......................... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(c)................ I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethyl acrylate........................ Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylamine solution (72% or less)..... Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .55-1(b)................ I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------N-Ethylbutylamine..................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(b)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethyl chloride........................ Press. Amb. II 1NA Ind. Pressure........... SR Restr. II P-2 NR Vent F Yes No...................... I-D NA 8

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------N-Ethylcyclohexylamine................ Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(b)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene chlorohydrin................. Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-D NA G

2 i i .50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene cyanohydrin.................. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes No...................... NA NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylenediamine....................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(c)................ I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene dibromide.................... Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F No No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene dichloride................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

Ethylene glycol monoalkyl ethers...... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-C NA GIncluding:............................ 2 i2-Ethoxyethanol.......................Ethylene glycol butyl ether...........Ethylene glycol tert-butyl ether......Ethylene glycol ethyl ether...........Ethylene glycol methyl ether..........Ethylene glycol n-propyl ether........Ethylene glycol isopropyl ether.......----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene glycol hexyl ether........... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene glycol propyl ether.......... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylene oxide........................ Press. Amb. I 1NA Ind. Pressure........... SR Restr. II P-2 Inert Vent F Yes .50-10.................. I-B .40-1(c) 4

2 i i .50-12..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethyl ether........................... Atmos. Amb. II 1NA Ind. Gravity............ PV Closed II G-1 Inert Vent F Yes .50-40.................. I-C NA G

2 i i .50-42..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2-Ethylhexyl acrylate................. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethylidene norbornene................. Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .50-5................... NA NA G

2 i i .50-74..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ethyl methacrylate.................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2-Ethyl-3-propylacrolein.............. Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-C NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Ferric chloride solutions............. Atmos. Amb. III 1 i i Integral Gravity........ Open Open II G-1 NR Vent N No .50-20.................. I-B NA G

2 i i .50-75..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Fluorosilicic acid (30% or less)...... Atmos. Amb. II 1 i i Ind. Gravity............ PV Closed II G-1 NR Vent F No .50-20.................. I-B NA 4

2 i i .50-22..................

.50-73..................

.50-77..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Formaldehyde solution (37% to 50%).... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F No .55-1(h)................ I-B NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Formic acid........................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-73.................. I-D NA G

2 i .55-1(i)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Furfural.............................. Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(h)................ I-C NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Glutaraldehyde solution (50% or less). Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N No No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Glyoxylic acid solution (50% or less). Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .50-73.................. NA NA G

2 i i .50-81..................

.58-1(e)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Hexamethylenediamine solution......... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(c)................ I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Hexamethyleneimine.................... Atmos. Amb. II 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .56-1(b), (c)........... I-C NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Hydrochloric acid..................... Atmos. Amb. III 1NA Ind. Gravity............ Open Open II G-1 NR Vent F No .50-20.................. I-B NA 4

2 i i .50-22..................

see Fluorosilicic acid (30% or less).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2-Hydroxyethyl acrylate............... Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... NA NA G

2 i .50-70(a)...............

.50-73..................

Isoprene.............................. Atmos. Amb. III 1 i Integral Gravity........ PV Open II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Kraft pulping liquors (free alkali Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR NR No .50-73.................. NA NA G

content 3% or more) (including: 2 i .56-1(a), (c), (g)......

Black, Green, or White liquor).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Mesityl oxide......................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methylacetylene, Propadiene mixture... Press. Amb. III 1 NA Ind. Pressure........... SR Restr. II P-2 NR Vent F Yes .50-79.................. I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methyl acrylate....................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methylamine solution (42% or less).... Atmos. Amb. II 1NA Ind. Gravity............ PV Closed II G-1 NR Vent F Yes .56-1(a), (b), (c), (g). I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methyl bromide........................ Press. Amb. I 1NA Ind. Pressure........... SR Closed I P-2 NR Vent F Yes .50-5................... I-D NA 2

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methyl chloride....................... Press. Amb. II 1NA Ind. Pressure........... SR Restr. II P-2 NR Vent F Yes .55-1(c)................ I-D NA 8

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methylcyclopentadiene dimer........... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-B NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Methyl diethanolamine................. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .56-1(b), (c)........... I-C NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2-Methyl-5-ethylpyridine.............. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(e)................ I-D NA G

Methyl methacrylate................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------2-Methylpyridine...................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(c)................ I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------alpha-Methylstyrene................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Monochloro- difluoromethane........... Press. Amb. III 1NA Ind. Pressure........... SR Restr. I P-1 NR NR No No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Morpholine............................ Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(c)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Motor fuel anti-knock compounds Atmos. Amb. I 1 i i Ind. Gravity............ PV Closed I G-1 NR Vent F Yes .50-6................... I-D NA .50-6

(containing lead alkyls). 2 i i .50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Nitric acid (70% or less)............. Atmos. Amb. II 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F No .50-20.................. I-B NA 4

2 i i .50-73..................

.50-80..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Nitrobenzene.......................... Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-D NA G

2 i i .50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Nitrogen, liquefied................... Press. Low III 1NA Ind. Pressure........... SR Restr. II-L P-1 NR Vent F No .40-1(a)................ NA .40-1(a) G

2 i .50-30..................

.50-36..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1- or 2-Nitropropane.................. Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-81.................. I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------o-Nitrotoluene........................ Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-D NA G

Alkyl(C7-C9) nitrates.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Oleum................................. Atmos. Amb. III 1 i i Integral Gravity........ Open Open II G-1 NR Vent N No .50-20.................. I-B NA 4

2 i i .50-21..................

.50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Pentachloroethane..................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F No No...................... NA NA G

1,3-Pentadiene........................ Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Perchloroethylene..................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F No No...................... NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Phenol................................ Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 NR Vent F Yes .50-5................... I-D NA 2

2 i .50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Phosphoric acid....................... Atmos. Amb. III 1 i i Integral Gravity........ Open Open II G-1 NR Vent N No .50-20.................. I-B NA 4

2 i .50-23..................

.50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Phosphorus, white (elemental)......... Atmos. Elev. I 1 i i Integral Gravity........ PV Closed I G-1 Water Vent F Yes .50-50.................. NA NA 4-8

2 i i Pad----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Phthalic anhydride (molten)........... Atmos. Elev. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Polyethylene polyamines............... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(e)................ NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Polymethylene polyphenyl isocyanate... Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 Dry Vent F Yes .55-1(e)................ NA NA G

Caustic potash solution.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------iso-Propanolamine..................... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(c)................ I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Propanolamine (iso-, n-).............. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .56-1(b), (c)........... I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Propionic acid........................ Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .50-73.................. I-D NA G

2 i i .55-1(g)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------iso-Propylamine....................... Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .55-1(c)................ I-D NA G

Propylene oxide....................... Press. Amb. II 1NA Ind. Pressure........... SR Restr. II P-1 Inert Vent F Yes .50-10.................. I-B NA G

2 i i .50-13..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------iso-Propyl ether...................... Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 Inert Vent F Yes .50-70(a)............... I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Pyridine.............................. Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(e)................ I-D NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium aluminate solution (45% or Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR NR No .50-73.................. NA NA G

less). Elev. 2 i .56-1(a), (b), (c)......----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium chlorate solution (50% or less) Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N No .50-73.................. NA NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium dichromate solution (70% or Atmos. Amb. II 1 i i Integral Gravity........ Open Closed II G-1 NR Vent N No .50-5(d)................ NA NA G

less). 2 i i .50-73..................

.56-1(b), (c)...........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium hydroxide solution, see Caustic

soda solution.----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium hypochlorite solution (20% or Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F No .50-73.................. NA NA G

less). 2 i i .56-1(a), (b)...........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium sulfide, hydrosulfide solutions Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N No .50-73.................. NA NA G

(H2S 15ppm or less). 2 i .55-1(b)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium sulfide, hydrosulfide solutions Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F No .50-73.................. NA NA G

(H2S greater than 15ppm but less than 2 i .55-1(b)................

200ppm).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium sulfide, hydrosulfide solutions Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F No .50-73.................. NA NA G

(H2S greater than 200ppm). 2 i .55-1(b)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sodium thiocyanate solution (56% or Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .58-1(a)................ NA NA G

less). 2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Styrene monomer....................... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sulfur (molten)....................... Atmos. Elev. III 1 i Integral Gravity........ Open Open II G-1 Vent N Vent N Yes .50-55.................. I-C .40- G

2 i i 1(f)(1)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sulfur dioxide........................ Press. Amb. I 1NA Ind. Pressure........... SR Closed ....... P-2 NR Vent F No .50-30.................. NA NA 2

2 i i .50-84..................

.55-1(j)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sulfuric acid......................... Atmos. Amb. III 1 i i Integral Gravity........ Open Open II G-1 NR Vent N No .50-20.................. I-B NA 4

2 i i .50-21..................

.50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Sulfuric acid, spent.................. Atmos. Amb. III 1 i i Integral Gravity........ Open Open II G-1 NR Vent N No .50-20.................. I-B NA 4

2 i i .50-21..................

.50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,1,2,2-Tetrachloroethane............. Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F No No...................... NA NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Tetraethylenepentamine................ Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(c)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Tetrahydrofuran....................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(b)............... I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Toluenediamine........................ Atmos. Elev. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .50-73.................. NA NA G

2 i .56-1(a), (b), (c), (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Toluene diisocyanate.................. Atmos. Amb. I 1 i i Integral Gravity........ PV Closed I G-1 Dry Vent F Yes .50-5................... I-D NA G

2 i i N 2 .55-1(e)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------o-Toluidine........................... Atmos. Amb. II 1 i i Integral Gravity........ PV Closed II G-1 NR Vent F Yes .50-5................... I-D NA G

2 i i .50-73..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,2,4-Trichlorobenzene................ Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes No...................... I-D NA G

1,1,2-Trichloroethane................. Atmos. Amb. III 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F No .50-73.................. I-D NA G

2 i .56-1(a)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Trichloroethylene..................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F No No...................... I-D NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1,2,3-Trichloropropane................ Atmos. Amb. II 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-73.................. I-D NA G

2 i .56-1(a)................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Triethanolamine....................... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(b)................ I-C NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Triethylamine......................... Atmos. Amb. II 1 i i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .55-1(e)................ I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Triethylenetetramine.................. Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR Vent N Yes .55-1(b)................ I-C NA G

2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Triphenylborane (10% or less), Caustic Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR NR No .56-1(a), (b), (c)...... NA NA G

soda solution. 2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Trisodium phosphate solution.......... Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR NR No .50-73.................. NA NA G

Elev. 2 i .56-1(a), (c)...........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Urea, Ammonium nitrate solution Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F No .56-1(b)................ I-D NA G

(containing more than 2% NH 3). 2 i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Valeraldehyde (all isomers)........... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 Inert Vent F Yes No...................... I-C NA G

2 i i----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vanillan black liquor (free alkali Atmos. Amb. III 1 i Integral Gravity........ Open Open II G-1 NR NR No .50-73.................. NA NA G

content 3% or more). 2 i .56-1(a), (c), (g)......----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vinyl acetate......................... Atmos. Amb. III 1 i Integral Gravity........ PV Open II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vinyl chloride........................ Press. Amb. II 1NA Ind. Pressure........... SR Closed II P-2 NR Vent F Yes .50-30.................. I-D NA 8

2 i i .50-34..................----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vinyl chloride........................ Atmos. Low II 1NA Ind. Gravity............ PV Closed II-L G-2 NR Vent F Yes .50-30.................. I-D .40- 8

2 i i .50-34.................. 1(b)(1)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Vinylidene chloride................... Atmos. Amb. II 1NA Ind. Gravity............ PV Closed II P-2 Padded Vent F Yes .55-1(f)................ I-D NA G

2 i i .50-70(a)...............

.50-81(a), (b)..........----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Vinyltoluene.......................... Atmos. Amb. III 1 i Integral Gravity........ PV Restr. II G-1 NR Vent F Yes .50-70(a)............... I-D NA G

2 i i .50-81..................

.56-1(a), (b), (c), (g).----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------For requirements see these sections in ........ ..... .10-1 .13- 5 .15- 1.................. .15-5 .15- 10 .20- 1 .20- 5 .25-1 .25-2 .30 ........................ 111.105 .40 .04- 5

Part 151:. (Sub-

chapter J)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------See Table 2 of Part 153 for additional cargoes permitted to be carried by tankbarge.Terms and symbols:Segregation--Tank--

Line 1--Segregation of cargo from surrounding waters:

i = Skin of vessel (single skin) only required. Cargo tank wall can be vessel's hull.

i i = Double skin required. Cargo tank wall cannot be vessel's hull.

Line 2--Segregation of cargo space from machinery spaces and other spaces which have or could have a source of ignition:

i = Single bulkhead only required. Tank wall can be sole separating medium.

i i = Double bulkhead required. Cofferdam, empty tank, pumproom, tank with Grade E Liquid (if compatible with cargo) is satisfactory.Internal tank inspection--

G--Indicates cargo is subject to general provisions of 151.04-5(b).

Specific numbers in this column are changes from the general provisions.Abbreviations used:Tank type: Ind = Independent.Vent:

PV = Pressure vacuum valve.

SR = Safety relief.Gauging device: Restr. = Restricted.General usage:

NR = No requirement.

NA = Not applicable.1. The provisions contained in 46 CFR Part 197, subpart C, apply to liquid cargoes containing 0.5% or more benzene by volume. [USCG-2000-7079, 65 FR 67183, Nov. 8, 2000]

Subpart 151.10_Barge Hull Construction Requirements