NR 105.06(7)(b)(b) The SACR shall be equal to the geometric mean of 3 acute-chronic ratios. Those ratios consist of the SMACRs available for the species in sub. (5) (c). When SMACRs are not available for the species in par. (a), the default acute-chronic ratio to be used is 18. Use of a SACR will result in the calculation of a secondary chronic value. NR 105.06(8)(8) Chronic toxicity criteria expressed in the dissolved form. Chronic water quality criteria may be expressed as a dissolved concentration. The conversion of a chronic water quality criterion expressed as a total recoverable concentration to a chronic water quality criterion expressed as a dissolved concentration, the portion of the substance which will pass through a 0.45 um filter, shall be done using the equations in pars. (a) and (b). Substances which may have criteria expressed as a dissolved concentration are listed in par. (a) with corresponding conversion factors. NR 105.06(8)(a)(a) The conversion of the water quality criterion expressed as total recoverable (WQCTotal R.) to the water quality criterion expressed as dissolved (WQCD) shall be performed as follows: WQCD = (CF)(WQCTotal R.)
Where: WQCTotal R. = Criteria from NR 105, Table 5 or 6.
CF = Conversion factor for total recover- able to dissolved.
Conversion factors are as follows:
Arsenic 1.000
Cadmium 0.850
Chromium (III) 0.860
Chromium (VI) 0.962
Copper 0.960
Lead 0.792
Mercury 0.85
Nickel 0.997
Selenium 0.922
Zinc 0.986
NR 105.06(8)(b)(b) The translation of the WQCD into the water quality criterion which accounts for site-specific conditions (WQCTRAN) shall be performed as follows: WQCTRAN = (Translator)(WQCD)
Where: Translator (unitless) = ((MP)(TSS) + MD)/MD
MP = Particle-bound concentration of the pollutant (ug/g) in receiving water.
MD = Dissolved concentration of the pollutant in receiving water (ug/L).
TSS = Total Suspended Solids (g/L) concentration in receiving water.
NR 105.06(8)(c)(c) The procedures in pars. (a) and (b) may also be used for the conversion of secondary values from total recoverable to dissolved. NR 105.06 NoteNote: * - Criterion listed is applicable to the “total recoverable” form except for chlorine which is applicable to the “total residual” form.
NR 105.06 NoteNote: This table is reserved for criteria that USEPA has indicated may be available in the near future.
NR 105.06 NoteNote: *Criterion listed is applicable to the “total recoverable” form except for chlorine which is applicable to the “total residual” form.
NR 105.06 HistoryHistory: Cr. Register, February, 1989, No. 398, eff. 3-1-89; am. (5) (f) and Tables 2, 2a, 4, 4a and 6, Register, July, 1995, No. 475, eff. 8-1-95; am. (1) (a) 1., 2., 4., and 5., (1) (b), (3) (intro.), (a) to (g), (4) (a) 1., 7. to 13., (5) (c), renum. (1) (a) 6. to be (1) (a) 10., (3) (h) to be (3) (i) and am. (1) (a) 10, (4) (a) 6. to be (4) (a) 6. a., (4) (b) to be (4) (c), (5) (e) to (i) to be (5) (d) to (h) and am. (5) (e) to (g), cr. (3) (h), (4) (a) 6. b., (4) (b), (5) (b) 3., (6) to (8), r. and recr., Tables 1 to 2a, 3 to 6, r. (5) (d); am. Tables 1 and 5, Register, January, 2000, No. 529, eff. 2-1-00; CR 03-050: am. Tables 2 and 6, cr. Tables 2C and 4B Register February 2004 No. 578, eff. 3-1-04; CR 07-110: am Tables 2, 2A, 5 and 6 Register November 2008 No. 635, eff. 12-1-08; CR 09-123: am. (5) (h), (8) (a), Tables 4B and 5 Register July 2010 No. 655, eff. 8-1-10.