- T -

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

— T —

tabular (abbreviation: tab).

talc – chemical compound – see NIOSH.

talc — Mg₃(OH)₂(Si₄O₁₀) — (silicate mineral).

tannin & lignin

tantalite — (Fe,Mn)(Ta,Nb)₂ O₆ — (oxide mineral).

tantalum (metal and oxide dust as Ta) – chemical compound – see NIOSH.

target analyte (synonym: compound of concern (COC)) —a chemical substance or class of chemicals that is selected for laboratory analysis or field analysis.  Source: (ASTM, 2004).

tatalum — chemical element — (abbreviation: Ta).

technetium — chemical element — (abbreviation: Tc).

TEDP – chemical compound – see NIOSH.

tellurium — chemical element; native element mineral, semi-metal — (abbreviation: Te ).

tellurium compounds (as Te) – chemical compound – see NIOSH.

tellurium hexafluoride – chemical compound – see NIOSH.

temperature (abbreviation: T).

tenorite — CoO — (oxide mineral).

tephritic foidite — rock classification, igneous — volcanic rock. 

tephritic phonolite — rock classification, igneous — volcanic rock. 

TEPP – chemical compound – see NIOSH.

tera-  –metric prefix – = 1,000,000,000,000 = 10¹².

terbium — chemical element — (abbreviation: Tb).

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

tert butyl chromate – chemical compound – CAS number 1189851. ACGIH TLV = 25 PPM (30  mg/m³) 15 min cieling; NIOSH REL 5.6 PPM (30  mg/m³ ) 15 minute cieling; NIOSH IDLH 15 mg/m³, OSHA PEL 25 PPM(133  mg/m³) TWA; LEL unknown.

tert-butyl acetate – chemical compound – CAS number 540885. ACGIH TLV = 200 PPM (950 mg/m³) TWA; NIOSH REL 200 PPM (950 mg/m³) TWA; NIOSH IDLH 1,500 ppm, OSHA PEL 200 PPM (950 mg/m³) TWA; LEL 1.5% (10% LEL 1,500 ppm).

tert-butyl alcohol – chemical compound – CAS number 75650. ACGIH TLV = 100 PPM (303 mg/m³) TWA; NIOSH REL 100 PPM (300 mg/m³) TWA, 150 PPM (450 mg/m³) STEL; NIOSH IDLH 1,600 ppm, OSHA PEL 100 PPM (300 mg/m³) TWA, 150 PPM (450 mg/m³) STEL; LEL 2.4% (10% LEL 2,400 ppm).

tertiary – Geologic Time, Period   – (approximately 65 – 1.8 MYA).

tetrachloroethane – chemical compound – see NIOSH.

tetrachloroethylene – chemical compound – see NIOSH.

tetrachloroethylene (acronym: PCE; synonyms: ethylene tetrachloride, perchlorethylene, ankiklostin, didakene, fedal-un, nema, perclene, persec, telen, tetracap, tetraleno, tetropil, antisil1, dow-per, perawin, perchlor, perchlor, percsolv, perk, perklone, tetraguer, telralex, tetravec) – organic chemical – (MCL = 0.001 mg/L).

tetrachloronapthalene – chemical compound – see NIOSH.

tetraethyl lead (as Pb) – chemical compound – see NIOSH.

tetrahedrite, tennantite — (Cu,Fe)₁₂Sb₄S₁₃ —  (sulfosalt minerals).

tetramethyl succinonitrile – chemical compound – see NIOSH.

tetranitromethane – chemical compound – see NIOSH.

tetryl – chemical compound – see NIOSH.

Texas (abbreviation: TX).

thallium (abbreviation: Tl) — chemical element,  inorganic chemical – (MCL =0.05 mg/L).

thallium (soluable compounds as Tl) – chemical compound – see NIOSH.

Thayer County Health Services – medical facility; Hebron, NE – (acronym, TCHS).

thiram – chemical compound – see NIOSH.

thoeiite — rock classification, igneous — volcanic basalt

thorium — chemical element — (abbreviation: Th).

threshold limit value (acronym: TLV) established by ACGIH.

threshold limit values (accronym: TLV)  – ref ACGIH.

thulium — chemical element — (abbreviation: Tm).

Tilden Community Hospital – medical facility; Tildon, NE – (acronym, TCH).

time weighted average (acronym: TWA).

tin — chemical element — (abbreviation: Sn)

tin (inorganic compounds, as Sn) – chemical compound – see NIOSH.

tin (organic compounds, as Sn) – chemical compound – see NIOSH.

Tipecano sequesnce – geologic stratigraphic description –.

titanium — chemical element — (abbreviation: Ti).

titanium dioxide – chemical compound – see NIOSH.

toluene – chemical compound – see NIOSH.

toluene (synonyms: methylbenzene, methacide, phenylmethane, toluol antisal a1) – organic chemical – (MCL = 1 mg/L).

tolyltriazole

tolytriazole

ton — unit of measure, weight —  (abbrv: t).

topaz — Al₂(OH,F)(SiO₄) — (silicate mineral).

Torridonian – geologic stratigraphic description –.

total coliform bacteria  (MCL or TT = 5% per month).

total extractable hydrocarbons (acronym: TEH).

total halogens

total inorganic nitrogen

total nitrogen

total organic carbon

total organic halogens (acronym: TOX).

total petroleum hydrocarbons (acronym: TPH).

total plate count heterograph

total trihalomethances (accronym: TTHMs) – disinfection byproduct – (MCL – 0.000 mg/L).

total tube count heterograph

tourmaline — Na(Mg,Fe)₃Al₆(OH)₄(BO₃)₃(Si₆O₁₈) — (silicate mineral).

toxaphene (synonyms:  chlorinated camphene, octachlorocamphene, camphorchlor,  argicide maggot killer, alltex, restoxo, compound 3956, M5055, M5055, melipax, motox, penphene, phenacide, phenatox, strobane-t, toxadust, toxakil, vertac 90%, toxon 63, attac, anatox, royal bran bean tox 82, cotton tox mp82, security tox-sol-6, security tox-mp cotton spray, security motox 63 cotton spray, agro-chem grand torbiadan 28,  Dr. Roger’s toxene) – organic chemical – (MCL = 0.003 mg/L).

toxicity characteristic leaching procedure (acronym: TCLP).

trachyte — rock classification, igneous — volcanic rock 

trademark (accronym: ™).

trans-1,2-dichloroethylene (acronym: T-1,2-DCE) – organic chemical – (MCL = 0.1 mg/L).

transaction screen process — the process described in ASTM Practice E 1528.   Source (ASTM, 2004).

treatment technique (acronym: TT).

tremolite — Ca₂Mg₅(OH)₂(Si₈O₂₂) — (silicate mineral).

triassic – Geologic Time, Period – (symbol: T_R, color: light peacock blue or bluish gray green) approximately 248 – 206 MYA; approximate duration: 30-35 MY.

trichloroethylene – chemical compound – see NIOSH.

trichloroethylene (acronym: TCE; synonyms: 1,1,2-trichlorethlylene, acetylene trichloroethylene, algelen, anameth, benzinol, chlorien, circorsolv, germalgene, lethurin, pera-a-chlor, petzinol, philix, tri-plus m, vitran) – organic chemical – (MCL = 0.005 mg/L).

trichloronapthalene – chemical compound – see NIOSH.

Tri-County Hospital – medical facility; Lexington, NE – (acronym, T-CH).

triethylamine – chemical compound – see NIOSH.

trifluorobormomethane – chemical compound – see NIOSH.

triorthocresyl phosphate – chemical compound – see NIOSH.

triphenyl phosphate – chemical compound – see NIOSH.

triphylite — Li(Fe,Mn)(PO₄) —  (phosphate mineral).

troy oz — unit of measure, weight —   = 480 grain avdp = 31.1 g.

TSD facility — treatment, storage, or disposal facility (see RCRA TSD facilities).   Source (ASTM, 2004).

tungsten — chemical element — (abbreviation: W).

turbidity (TT = 1 NTU).

turpentine – chemical compound – see NIOSH.

turquois — CuAl₆(OH)₈(PO₄)₄●4H₂0 — (phosphate mineral).

Two Medicine formation – geologic stratigraphic description –.

Tyndall stone – geologic stratigraphic description –.