Ephemeral watercourses within smelter tailing soils investigation unit lands at the Chino mines company, limited to Chino mines property subwatershed drainage A and tributaries thereof, Chino mines property subwatershed drainage B and tributaries thereof (excluding the northwest tributary containing Ash spring and the Chiricahua leopard frog critical habitat transect); Chino mines property subwatershed drainage C and tributaries thereof (excluding reaches containing Bolton spring, the Chiricahua leopard frog critical habitat transect and all reaches in subwatershed C that are upstream of the Chiricahua leopard frog critical habitat); subwatershed drainage D and tributaries thereof (drainages D-1, D-2 and D-3, excluding the southeast tributary in drainage D1 that contains Brown spring) and subwatershed drainage E and all tributaries thereof (drainages E-1, E-2 and E-3).

1. A. Designated uses: Limited aquatic life, livestock watering, wildlife habitat and secondary contact.

2. B. Criteria: The use-specific numeric criteria set forth in 20.6.4.900 NMAC are applicable to the designated uses, except that the following segment-specific criteria apply: the acute aquatic life criteria for copper set forth in Subsection I of 20.6.4.900 NMAC shall be determined by multiplying that criteria by the water effect ratio (“WER”) adjustment expressed by the following equation:

   WER = [if gte msEquation 12]><m:oMath><m:f><m:fPr><span style='font-size:12.0pt;mso-ansi-font-size:12.0pt;mso-bidi-font-size:12.0pt; font-family:"Cambria Math",serif;mso-ascii-font-family:"Cambria Math"; mso-fareast-font-family:Calibri;mso-hansi-font-family:"Cambria Math"; font-style:italic;mso-bidi-font-style:normal'><m:ctrlPr></m:ctrlPr></span></m:fPr><m:num><m:sSup><m:sSupPr><span style='font-size:12.0pt;mso-ansi-font-size:12.0pt;mso-bidi-font-size:12.0pt; font-family:"Cambria Math",serif;mso-ascii-font-family:"Cambria Math"; mso-fareast-font-family:Calibri;mso-hansi-font-family:"Cambria Math"; font-style:italic;mso-bidi-font-style:normal'><m:ctrlPr></m:ctrlPr></span></m:sSupPr><m:e><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr>[10</m:r></span></m:e><m:sup><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr> 0.588+(0.703 ×</m:r></span><m:func><m:funcPr><span style='font-size:12.0pt; mso-ansi-font-size:12.0pt;mso-bidi-font-size:12.0pt;font-family:"Cambria Math",serif; mso-ascii-font-family:"Cambria Math";mso-fareast-font-family:Calibri; mso-hansi-font-family:"Cambria Math";font-style:italic;mso-bidi-font-style: normal'><m:ctrlPr></m:ctrlPr></span></m:funcPr><m:fName><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr>log</m:r></span></m:fName><m:e><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr>DOC)+(0.395 ×</m:r></span><m:func><m:funcPr><span style='font-size:12.0pt; mso-ansi-font-size:12.0pt;mso-bidi-font-size:12.0pt;font-family:"Cambria Math",serif; mso-ascii-font-family:"Cambria Math";mso-fareast-font-family:Calibri; mso-hansi-font-family:"Cambria Math";font-style:italic;mso-bidi-font-style: normal'><m:ctrlPr></m:ctrlPr></span></m:funcPr><m:fName><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr>log</m:r></span></m:fName><m:e><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr>Alkalinity)</m:r></span><i style='mso-bidi-font-style:normal'><span style='font-size:12.0pt; font-family:"Cambria Math",serif;mso-fareast-font-family:Calibri'><m:r> </m:r></span></i></m:e></m:func><span style='mso-fareast-font-family: Calibri'><m:r><m:rPr><m:nor/></m:rPr><span style='mso-spacerun:yes'> </span></m:r></span></m:e></m:func></m:sup></m:sSup><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr>] ×(</m:r></span><m:sSup><m:sSupPr><span style='font-size:12.0pt;mso-ansi-font-size:12.0pt;mso-bidi-font-size:12.0pt; font-family:"Cambria Math",serif;mso-ascii-font-family:"Cambria Math"; mso-fareast-font-family:Calibri;mso-hansi-font-family:"Cambria Math"; font-style:italic;mso-bidi-font-style:normal'><m:ctrlPr></m:ctrlPr></span></m:sSupPr><m:e><m:f><m:fPr><span style='font-size:12.0pt;mso-ansi-font-size:12.0pt;mso-bidi-font-size: 12.0pt;font-family:"Cambria Math",serif;mso-ascii-font-family:"Cambria Math"; mso-fareast-font-family:Calibri;mso-hansi-font-family:"Cambria Math"; font-style:italic;mso-bidi-font-style:normal'><m:ctrlPr></m:ctrlPr></span></m:fPr><m:num><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr>100</m:r></span></m:num><m:den><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr> Hardness</m:r></span></m:den></m:f><span style='mso-fareast-font-family: Calibri'><m:r><m:rPr><m:nor/></m:rPr>)</m:r></span></m:e><m:sup><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr>0.9422</m:r></span></m:sup></m:sSup></m:num><m:den><span style='mso-fareast-font-family:Calibri'><m:r><m:rPr><m:nor/></m:rPr>19.31</m:r></span></m:den></m:f></m:oMath><![endif]if !msEquation endif

   For purposes of this section, dissolved organic carbon (DOC) is expressed in units of milligrams carbon per liter or mg C/L; alkalinity is expressed in units of mg/L as CaCO₃, and hardness is expressed in units of mg/L as CaCO₃. In waters that contain alkalinity concentrations greater than 250 mg/L, a value of 250 mg/L shall be used in the equation. In waters that contain DOC concentrations greater than 16 mg C/L, a value of 16 mg C/L shall be used in the equation. In waters that contain hardness concentrations greater than 400 mg/L, a value of 400 mg/L shall be used in the equation. The alkalinity, hardness and DOC concentrations used to calculate the WER value are those measured in the subject water sample.

[20.6.4.809 NMAC - N, 3/2/2017]