- N -

The following are commonly used abbreviations, acronyms, and a glossary of specialized terms starting with the letter:

— N —

n,n-dimethylanaline – chemical compound – see NIOSH

n-amly acetate – chemical compound – CAS number 626-38-0. ACGIH TLV = 100 PPM (525 mg/m³),IDLH = 1,000  ppm, NIOSH REL 100 PPM (525 mg/m³)TWA, OSHA PEL 100 PPM (525 mg/m³). 

nano- –metric prefix – (symbol: n) = 0.000,000,001= 10^-9.

naptha (coal tar) – chemical compound – see NIOSH

napthalene – chemical compound – see NIOSH

national contaminant occurrence database (acronym: NCOD).

national contingency plan (acronym: NCP) — the national oil and hazardous substances pollution contingency plan, 40 CFR § 300; EPA’s blueprint on how hazardous substances are to be cleaned up pursuant to CERCLA.   Source (ASTM, 2004).

National Contingency Plan (acronym: NCP).

National Ground Water Association (acronym: NGWA).

national pollutant discharge elimination system (acronym: NPDES).

national primary drinking water standards (acronym: NPWRS; synonym: primary standards)

national priorities list (acronym NPL) — list compiled by EPA pursuant to CERCLA 42 USC § 9605(a)(8)(B) of properties with the highest priority for cleanup pursuant to EPA’s hazard ranking system. See 40 CFR Part 300.   Source (ASTM, 2004).

national priorities list (acronym: NPL).

National Priority Listed (site); (acronym: NPL site) (syn: Superfund site).

National Response Center (acronym: NRC) — contact: 800.424.8802.

national water information system (acronym: NWIS).

Natural Resources Conservation Services (acronym: NRCS).

nautical mi — unit of measure, linear distance / length —  =600 ft = 1.152 stat mi.

Navajo sandstone – geologic stratigraphic description –.

n-butyl acetate – chemical compound – CAS number 123864. ACGIH TLV = 150 PPM (710 mg/m³) TWA, 200 PPM (950 mg/m³) STEL; NIOSH REL 150 PPM (710 mg/m³) TWA, 200 PPM (950 mg/m³) STEL; NIOSH IDLH 1,700 ppm, OSHA PEL 150 PPM (710 mg/m³) TWA; LEL 1.7% (10% LEL 1,700 ppm).

n-butyl alcohol – chemical compound – CAS number 71363. ACGIH TLV = 50 PPM (152 mg/m³) ceiling; NIOSH REL 50 PPM (150 mg/m³) ceiling; NIOSH IDLH 1,400 ppm, OSHA PEL 100 PPM (150 mg/m³) TWA; LEL 1.4% (10% LEL 1,400 ppm).

n-butyl gycidl ether – chemical compound – CAS number 2426086. ACGIH TLV = 0.1  mg/m³ ceiling; NIOSH REL 0.001  mg/m³ TWA, potential occupational carcinogen; NIOSH IDLH 15 mg/m³, OSHA PEL 0.1  mg/m³ ceiling; LEL unknown.

n-butyl mercaptan – chemical compound – CAS number 109795. ACGIH TLV = 0.5 PPM (1.5  mg/m³) TWA; NIOSH REL 0.5 PPM (1.8  mg/m³) 15 minute ceiling; NIOSH IDLH 500 ppm, OSHA PEL 0.5 PPM (1.8  mg/m³) TWA; LEL unknown.

n-buylamine – chemical compound – CAS number 109739. ACGIH TLV = 5 PPM (15 mg/m³) ceiling; NIOSH REL 5 PPM (15 mg/m³) ceiling; NIOSH IDLH 300 ppm, OSHA PEL 5 PPM (15 mg/m³) ceiling; LEL 1.7% (10% LEL 1,700 ppm).

Nebraska (abbreviation: NE).

Nebraska Board of Architects & Engineers (acronym: NBA&E).

Nebraska Board of Geologists (acronym: NBOG).

Nebraska Christian College (Norfolk, NE) (acronym: NCC_COC).

Nebraska Department of Agriculture (acronym: NDA).

Nebraska Department of Environmental Control (acronym: NDEC).

Nebraska Department of Environmental Quality (acronym: NDEQ)

Nebraska Department of Natural Resources  (acronym: DNR).

Nebraska Department of Roads (acronym: NDOR).

Nebraska Department of Water Resources (acronym: NDWR).

Nebraska Health & Human Services System (acronym: NHHSS).

Nebraska Medical Center – medical facility; Omaha, NE – (acronym, NMC).

Nebraska Medical Center – medical institution; Omaha, Nebraska – (acronym: NMC).

Nebraska Methodist College (Omaha, NE) (acronym: NMC_M).

Nebraska Secretary of State (acronym: NSOS).

Nebraska State Fire Marshal (acronym: NSFM).

Nebraska Wesleyan University  (acronym: NWU_W).

Nemaha County Hospital – medical facility; Auburn, NE – (acronym, NCH).

Nemegt formation – geologic stratigraphic description –.

neodymium — chemical element — (abbreviation: Nd).

neon — chemical element — (abbreviation: F).

neoproterozoic – geologic time, period – (approximately 900 – 543 MYA).

nepheline (abbreviation: neph).

nephelolmetric turbitidy unit (acronym: NTU)

neptunium — chemical element — (abbreviation: Np).

n-ethylmorpholine – chemical compound – see NIOSH

Neuquén group – geologic stratigraphic description –.

New Mexico (abbreviation: NM).

New Red sandstone – geologic stratigraphic description –.

n-heptane – chemical compound – see NIOSH

n-hexane – chemical compound – see NIOSH

niccolite — NiAs — (sulfide mineral).

nickel — chemical element — (abbreviation: Ni).

nickel carbonyl (as Ni) – chemical compound – see NIOSH

nickel metal and other compounds as (Ni) – chemical compound – see NIOSH

nicotine – chemical compound – see NIOSH

niobium — chemical element — (abbreviation: Nb).

nitrate measured as nitrogen – inorganic chemical – (MCL = 10).

nitric acid – chemical compound – see NIOSH

nitric oxide – chemical compound – see NIOSH

nitrite measured as nitrogen – inorganic chemical – (MCL = 10).

nitroaeromatics

nitrobenzene – chemical compound – see NIOSH

nitroethane – chemical compound – see NIOSH

nitrogen — chemical element — (abbreviation: N).

nitrogen dioxide – chemical compound – see NIOSH

nitrogen trifluoride – chemical compound – see NIOSH

nitroglycerine – chemical compound – see NIOSH

nitromethane – chemical compound – see NIOSH

nitrotoluene (o, m, p isomers) – chemical compound – see NIOSH

nobelium  — chemical element — (abbreviation: No).

nodular (abbreviation: nod) .

non-destructive testing (acronym: NDT).

Nordaway silt loam, 0-2 % slopes – USDA, SCS soil classification – (symbol: No).

Nordaway silt loam, channeled – USDA, SCS soil classification – (symbol: Ns).

North Dakota (abbreviation: ND).