329 IAC 10-29-10
329 IAC 10-29-10 Ground water quality standard
Cite as Ind. Admin. Code tit. 329, r. 10-29-10
Sec. 10. (a) The constituents that comprise the ground water protection standard for the purposes of this rule are as follows:
(1) The following inorganics:
(A) Arsenic.
(B) Barium.
(C) Cadmium.
(D) Chromium.
(E) Fluoride.
(F) Lead.
(G) Mercury.
(H) Nitrate (as nitrogen).
(I) Selenium.
(J) Silver.
(2) The following volatile organic compounds:
(A) Acetone.
(B) Acrolein.
(C) Acrylonitrile.
(D) Benzene.
(E) Bromodichloromethane.
(F) Bromoform.
(G) Bromomethane.
(H) 2-butanone; (methyl ethyl ketone).
(I) Carbon disulfide.
(J) Carbon tetrachloride.
(K) Chlorobenzene.
(L) Chlorodibromomethane.
(M) Chloroethane.
(N) 2-chloroethyl vinyl ether.
(O) Chloroform.
(P) Chloromethane.
(Q) Dibromomethane.
(R) Dichlorodifluoromethane.
(S) 1,1-dichloroethane.
(T) 1,2-dichloroethane.
(U) 1,2-dichloroethene (total).
(V) cis-1,3-dichloropropene.
(W) trans-1,3-dichloropropene.
(X) Ethylbenzene.
(Y) Ethyl methacrylate.
(Z) 2-hexanone.
(AA) Iodomethane.
(BB) Methylene chloride.
(CC) 4-methyl-2-pentanone.
(DD) Styrene.
(EE) 1,1,2,2-tetrachloroethane.
(FF) Toluene.
(GG) 1,1,1-trichloroethane.
(HH) 1,1,2-trichloroethane.
(II) Trichloroethene.
(JJ) Trichlorofluoromethane.
(KK) 1,2,3-trichloropropane.
(LL) Vinyl acetate.
(MM) Vinyl chloride.
(NN) Xylenes (total).
(b) The concentrations of the constituents listed in subsection (a) must not exceed current background concentrations or the maximum
contamination level (MCL) established for the constituent, whichever is the higher concentration. If an MCL has not been established, then the
concentration limit is the background concentration of ground water at the facility. When background is the standard, statistically significant
exceedances must be determined as provided in section 5 of this rule.
(c) As used in this section, "maximum contamination level" or "MCL" is defined under 329 IAC 10-2-110.