New Mexico Administrative Code › Title 20 - ENVIRONMENTAL PROTECTION › Chapter 6 - WATER QUALITY › Part 2 - GROUND AND SURFACE WATER PROTECTION › Section 20.6.2.3103 - STANDARDS FOR GROUND WATER OF 10,000 mg/l TDS CONCENTRATION OR LESS

Current through Register Vol. 35, No. 13, July 16, 2024
The following standards are the allowable pH range and the
				  maximum allowable concentration in ground water for the contaminants specified
				  unless the existing condition exceeds the standard or unless otherwise provided
				  in Subsection E of Section
				  20.6.2.3109
				  NMAC. Regardless of whether there is one contaminant or more than one
				  contaminant present in ground water, when an existing pH or concentration of
				  any water contaminant exceeds the standard specified in Subsection A, B, or C
				  of this section, the existing pH or concentration shall be the allowable limit,
				  provided that the discharge at such concentrations will not result in
				  concentrations at any place of withdrawal for present or reasonably foreseeable
				  future use in excess of the standards of this section. These standards shall
				  apply to the dissolved portion of the contaminants specified with a definition
				  of dissolved being that given in the publication "
methods for chemical
				  analysis of water and waste of the U.S. environmental protection
				  agency
," with the exception that standards for mercury, organic
				  compounds and non-aqueous phase liquids shall apply to the total nonfiltered
				  concentrations of the contaminants. If the secretary determines that there is a
				  reasonable probability of facilitated contaminant transport by colloids or
				  organic macromolecules, or that proper filtration procedures are not being
				  followed, the discharger may be required to test for both filtered and
				  nonfiltered portions of inorganic contaminants to develop appropriate protocol
				  for monitoring contaminants that have the potential to migrate through the
				  aquifer.
A.
Human Health
				Standards
(1)
Numerical
				Standards
(a) Antimony (Sb) (CAS
				7440-36-0)............0.006 mg/1
(b) Arsenic (As) (CAS
				7440-38-2)............0.01 mg/l
(c)
				Barium (Ba) (CAS 7440-39-3)...............2 mg/l
(d) Beryllium (be) (CAS
				7440-41-7)........0.004 mg/l
(e)
				Cadmium (Cd) (CAS 7440-43-9)...........0.005 mg/l
(f) Chromium (Cr) (CAS 7440-47-3).......
				....0.05 mg/l
(g) Cyanide (CN) (CAS
				57-12-5)..............0.2 mg/l
(h)
				Fluoride (F) (CAS 16984-48-8)............1.6 mg/l
(i) Lead (Pb) (CAS 7439-92-1)..........0.015
				mg/l
(j) Total Mercury (Hg) (CAS
				7439-97-6)...........0.002 mg/l
(k)
				Nitrate (NO3 as N) (CAS 14797-55-8)............10.0
				mg/l
(l) Nitrite
				(NO2 as N) (CAS 10102-44-0)...........1.0 mg/l
(m) Selenium (Se) (CAS
				7782-49-2)............0.05 mg/l
(n)
				Silver (Ag) (CAS 7440-224)............0.05 mg/l
(o) Thallium (Tl) (CAS
				7440-28-0).............0.002 mg/l
(p) Uranium (U) (CAS
				7440-61-1)............0.03 mg/l
(q)
				Radioactivity: Combined Radium-226 (CAS 13982-63-3) and Radium-228 (CAS
				15262-20-1)...........5 pCi/l
(r)
				Benzene (CAS 71-43-2).............0.005 mg/l
(s) Polychlorinated biphenyls (PCB's) (CAS
				1336-36-3).0.0005 mg/l
(t) Toluene
				(CAS 108-88-3)..................1 mg/l
(u) Carbon Tetrachloride (CAS
				56-23-5)...........0.005 mg/l
(v)
				1,2-dichloroethane (EDC) (CAS 107-06-2).......0.005 mg/l
(w) 1,1-dichloroethylene (1,1-DCE) (CAS
				75-35-4).....0.007 mg/l
(x)
				tetrachloroethylene (PCE) (CAS 127-18-4).....0.005 mg/l
(y) trichloroethylene (TCE) (CAS
				79-01-6).........0.005 mg/l
(z)
				ethylbenzene (CAS 100-41-4).............0.7 mg/l
(aa) total xylenes (CAS
				1330-20-7)........................0.62 mg/l
(bb) methylene chloride (CAS
				75-09-2)............0.005 mg/l
(cc)
				chloroform (CAS 67-66-3).................0.1 mg/l
(dd) 1,1-dichloroethane (CAS
				75-34-3)..............0.025 mg/l
(ee) ethylene dibromide (EDB) (CAS
				106-93-4)......0.00005 mg/l
(ff)
				1,1,1-trichloroethane (CAS 71-55-6)..............0.2 mg/l
(gg) 1,1,2-trichloroethane (CAS
				79-00-5).............0.005 mg/l
(hh) 1,1,2,2-tetrachloroethane (CAS
				79-34-5).............0.01 mg/l
(ii)
				vinyl chloride (CAS 75-01-4)..............0.002 mg/l
(jj) PAHs: total naphthalene (CAS 91-20-3)
				plus monomethylnaphthalenes .0.03 mg/l
(kk) benzo-a-pyrene (CAS
				50-32-8)............0.0002 mg/l
(ll) cis-1,2-dichloroethene (CAS
				156-59-2)............0.07 mg/l
(mm)
				trans-1,2-dichloroethene (CAS 156-60-5)............0.1 mg/l
(nn) 1,2-dichloropropane (PDC) (CAS
				78-87-5)..........0.005 mg/l
(oo)
				styrene (CAS 100-42-5).....................0.1 mg/l
(pp) 1,2-dichlorobenzene (CAS
				95-50-1)...............0.6 mg/l
(qq) 1,4-dichlorobenzene (CAS
				106-46-7)..............0.075 mg/l
(rr) 1,2,4-trichlorobenzene (CAS
				120-82-1).............0.07 mg/l
(ss) pentachlorophenol (CAS
				87-86-5)...............0.001 mg/l
(tt) atrazine (CAS
				1912-24-9).................0.003 mg/l