2018-03-01_HYDROLOGY - C1981010 ‎(2)‎

• Permit No: C1981010
• IBM Index Class Name: Hydrology
• Doc Date: 3/1/2018
• Doc Name: CDPS/NPDES Permit
• From: Department of Public Health & Environment
• To: DRMS
• Permit Index Doc Type: NPDES
• Email Name: RAR
• Media Type: D
• Archive: No

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\; !• Department of Public
' 8I Health b Environment
Water Quality Assessment
Table A -18e
Final Selection of WQBELs and NILS Outfall 021
Pollutant
NIL
New WQBEL
Chosen Limit
Aquatic Life Parameters
Fe, TR (pg/l) 3000 1 1000 WQBEL
Table A -18f
Final Selection of WQBELs and NILS Outfall 023
Pollutant
NIL
New WQBEL
ADBAC
Chosen Limit
Aquatic Life Parameters
Fe, TR (pg/1) 3000 1 1000 1 NA WQBEL
Table A -18f
Final Selection of WQBELs and ADBACs Outfall 025
Pollutant
NIL
New WQBEL
ADBAC
Chosen Limit
Aquatic Life Parameters
As, Dis (pg/l)
NA
340
51
ADBAC
Cd, Dis (pg/1)
NA
0.5
0.075
ADBAC
Cr+3, Dis (pg/1)
NA
88
13
ADBAC
Cu, Dis (pg/l)
NA
11
6.8
ADBAC
Fe, TR (pg/1)
NA
1000
150
ADBAC
Pb, Dis (pg/1)
NA
3.2
0.56
ADBAC
Mn, Dis (pg/1)
NA
1772
285
ADBAC
Hg, Tot (pg/l)
NA
0.01
0.0015
ADBAC
Ni, Dis (pg/l)
NA
62
10
ADBAC
Se, Dis (pg/l)
NA
4.6
1.3
ADBAC
Ag, Dis (pg/1)
NA
0.46
0.069
ADBAC
Zn, Dis (pg/1)
NA
147
25
ADBAC
Human Health Parameters
As, TR (pg/1)
NA
0.13
0.7
WQBEL
Cr+3, TR (pg/1)
NA
225
529
WQBEL
Hg, Tot (pg/1)
NA
0.067
0.053
ADBAC
Alternatives Analysis
If the permittee does not want to accept an effluent limitation that results in no increased impact (NIL) or
in insignificant degradation (ADBAC), the applicant may conduct an alternatives analysis (AA). The AA
Pae 39 of 40
4300 Cherry Creek Drive S., Denver, CO 80246-1530 303-692-2000 www.cotorado.goy/cdphe/wqcd I ��