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National Pollutant Discharge Elimination System/State Disposal
System
MN0020192 Permittee: City of Detroit Lakes
Facility name: Detroit Lakes Wastewater Treatment Facility
Receiving water: Unnumbered Wetland – (Class 2D, 3D, 4C, 5, 6
water) to
St Clair Lake – (Class 2B, 3C, 4A, 4B, 5, 6 water)
City: Detroit Lakes County: Becker
Issuance date: February 06, 2014
Expiration date: January 31, 2019
Modification date: TBD
The state of Minnesota, on behalf of its citizens through the
Minnesota Pollution Control Agency (MPCA), authorizes the Permittee
to operate a disposal system at the facility named above and to
discharge from this facility to the receiving water named above, in
accordance with the requirements of this permit. The goal of this
permit is to reduce pollutant levels in point source discharges and
protect water quality in accordance with the U.S. Clean Water Act,
Minnesota statutes and rules, and federal laws and regulations.
This permit is effective on the issuance date identified above.
This permit expires at midnight on the expiration date identified
above.
Signature: [Type e-Signature] This document has been
electronically signed. for the Minnesota Pollution Control
Agency
Paul C. Scheirer Supervisor Northeast/Northwest Regional Unit
Municipal Division
Submit eDMRs Questions on this permit? Submit via the MPCA
Online Services Portal at For eDMR and other permit reporting
issues, contact: https://netweb.pca.state.mn.us/private/ Jennifer
Satnik, 651-757-2692
Submit other WQ reports to: For specific permit requirements
please refer to: Attention: WQ Submittals Center Joe Braun,
218-846-8126 Minnesota Pollution Control Agency 520 Lafayette Road
North Wastewater Permit Program general questions, contact: St.
Paul, MN 55155-4194 MPCA, 651-282-6143 or 1-800-657-3938.
https://netweb.pca.state.mn.us/private/
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Table of Contents
Page
1. Permitted facility description
.......................................................................................................................................
3 2. Location map of permitted facility
...............................................................................................................................
5 3. Flow diagram
................................................................................................................................................................
7 4. Summary of stations and station
locations..................................................................................................................
8 5. Permit requirements
....................................................................................................................................................
9 6. Submittal action summary
.........................................................................................................................................
40 7. Limits and monitoring
................................................................................................................................................
47
8. Appendix A
………………………………………………………………………………………………………………………………………………………….70
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 3 of 70 Permit modified: 1. Permitted
facility description The Detroit Lakes Wastewater Treatment
Facility (Facility) is located at 1150 Willow St W, Detroit Lakes,
Minnesota 56502, Becker County. Major components of the facility
include:
1 Collection System with gravity and/or Pressure Sewer 1 Bar
Screen – mechanical 1 Pumping (Lift) Station 1 Grit Removal Unit 2
Primary Clarifiers 2 Trickling Filters 1 Secondary Clarifier 1
Polishing Pond without aeration (3 acres) 1 Polishing Pond without
aeration (25 acres) Effluent Pumping Phosphorus Removal – chemical
2 Filters – sand with backwash 1 Chlorination Unit 19 Rapid
Infiltration Basins (21.75 acres total) 4 Spray Irrigations –
agricultural (53.97 acres) 2 Anaerobic Solids Digesters 1 Biosolids
Storage Tank (137,000 gallons) Biosolids Land Application
The existing treatment system consists of 60 lift stations, a
bar screen, aerated grit removal, two primary clarifiers, two
trickling filters, a secondary settling tank, a 3-acre polishing
pond (4.75 day detention time), a 25-acre polishing pond (18 day
detention time), a chemical precipitation plant, a chlorination
unit, two dual media filters, 19 rapid infiltration basins (RIBs)
(21.75 acres total), four spray irrigation sites (54 acres total),
a 450-foot long effluent dispersion ditch, a primary and secondary
sludge digester, three sludge storage tanks (326,486 gallons total
capacity), and a stand-by generator. Fourteen ground water
monitoring wells are installed at the Facility for monitoring the
irrigation and rapid infiltration basin sites. The Facility
discharges (SD002) to the dispersion ditch that discharges to a
peat bog and then to St. Clair Lake. The Facility is designed to
treat an average annual influent flow of 1.64 million gallons per
day (mgd) and an average wet weather flow of 2.02 mgd with a 5-day
carbonaceous biochemical oxygen demand (CBOD5) strength of 320
milligrams per liter (mg/L). From approximately April 15 to
December 31, the treated effluent may be applied to the rapid
infiltration basins (RIBs). From approximately May 15 to October
31, the treated effluent is applied to the four spray irrigation
fields. RIBs may be used concurrently with the spray irrigation
system. The Facility is further described in plans and
specifications on file with the MPCA (WPC 3673 stated December 29,
1961, and Permit #8524 dated July 15, 1974) and in engineering
reports prepared by Larson and Associates (Ulteig Engineers, Inc.),
Detroit Lakes, Minnesota. The Facility was expanded and upgraded in
1995 and 1996. Plans and specifications for the upgraded Facility
were prepared by Larson-Peterson and Associates (Ulteig Engineers,
Inc.), Detroit Lakes, Minnesota and are on file with the MPCA.
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 4 of 70 Permit modified: PROPOSED UPGRADED
FACILITY CHANGES: The application documents indicate the existing
treatment Facility will be upgraded to include two rotary
mechanical screens with six millimeter openings, a new vortex grit
chamber, two rotary mechanical fine screens with two millimeter
openings, two equalization tanks, an activated sludge system with
no clarifier (the activated sludge system will have anaerobic,
anoxic and oxic zones), a four-train membrane bio-reactor (MBR)
system that specializes in the advanced removal of nutrients, and
ultraviolet (UV) disinfection as backup disinfection process. The
existing two anaerobic digesters will be converted to aerobic
digesters with sludge pre-thickening. The project also includes
dewatering by centrifuge and cake storage of biosolids. The
proposed upgraded Facility will result in an Average Wet Weather
(AWW) design flow increase to 2.21 mgd. The Average Dry Weather
Flow will be expanded to 1.86 mgd. The upgraded Facility will
utilize their currently permitted surface discharge location
(SD002) as the location for the total Facility effluent. Upon
initiation of operation, the Facility will abandon the currently
permitted spray irrigation fields, RIBs, and will decommission both
of the existing polishing ponds. Anti-degradation and
Anti-backsliding language applicable to all NPDES/SDS permits:
Changes to the facility may result in an increase in pollutant
loading to surface waters or other causes of degradation to surface
waters. If a change to the facility will result in a net increase
in pollutant loading or other causes of degradation that exceed the
maximum loading authorized through conditions specified in the
existing permit, the changes to the facility are subject to
antidegradation requirements found in Minn. R. 7050.0250 to
7050.0335. This Permit also complies with Minn. R. 7053.0275
regarding anti-backsliding. Any point source discharger of sewage,
industrial, or other wastes for which a NPDES permit has been
issued by the MPCA that contains effluent limits more stringent
than those that would be established by Minn. R. 7053.0215 to
7053.0265 shall continue to meet the effluent limits established by
the permit, unless the permittee establishes that less stringent
effluent limits are allowable pursuant to federal law, under
section 402(o) of the Clean Water Act, United States Code, title
33, section 1342.]
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 5 of 70 Permit modified: 2. Location map of
permitted facility
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 6 of 70 Permit modified:
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 7 of 70 Permit modified: 3. Flow diagram
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 8 of 70 Permit modified: 4. Summary of
stations and station locations
Station Type of station Local name PLS location GW 001 Well,
Downgradient MW-1 T139N, R41W, S32, NE Quarter of the SE
Quarter
of the SE Quarter GW 002 Well, Upgradient MW-2 T139N, R41W, S32,
NE Quarter of the NW Quarter
of the NE Quarter GW 003 Well, Downgradient MW-3 T139N, R41W,
S29, SE Quarter of the NW Quarter
of the SE Quarter GW 004 Well, Upgradient MW-4 T139N, R41W, S29,
NE Quarter of the SW Quarter
of the SE Quarter GW 005 Well, Upgradient MW-5 T139N, R41W, S29,
NE Quarter of the SE Quarter
of the NE Quarter GW 006 Well, Downgradient MW-6 T139N, R41W,
S29, SE Quarter of the NE Quarter
of the NE Quarter GW 007 Well, Downgradient MW-7 T139N, R41W,
S29, SE Quarter of the NE Quarter
of the SE Quarter GW 009 Well, Downgradient MW-9 T139N, R41W,
S28, SW Quarter of the SW Quarter
of the NW Quarter GW 010 Well, Downgradient MW-10 T139N, R41W,
S28, SW Quarter of the SW Quarter
of the SW Quarter GW 011 Well, Downgradient MW-11 T139N, R41W,
S33, NW Quarter of the NW
Quarter of the NE Quarter GW 012 Well, Downgradient MW-12 T139N,
R41W, S33, NW Quarter of the NW
Quarter of the NW Quarter GW 013 Well, Downgradient MW-13 T139N,
R41W, S33, NW Quarter of the NW
Quarter of the SW Quarter GW 014 Well, Downgradient MW-14 T139N,
R41W, S33, NW Quarter of the SW
Quarter of the SW Quarter GW 015 Well, Downgradient MW-15 T139N,
R41W, S33, SW Quarter of the NE Quarter
of the NW Quarter LA 319 Application Site, Spray with
Soils Tests Crop and Soils-Irrigation Site #1 & 2
T139N, R41W, S29, NE Quarter of the NE Quarter
LA 320 Application Site, Spray with Soils Tests
Crop and Soils-Irrigation Site #3 & 4
T139N, R41W, S29, SE Quarter of the NE Quarter
SD 002 Effluent To Surface Water Chem PPT Plant to Unnamed
Wetland
T139N, R41W, S33, SW Quarter of the NW Quarter
WS 002 Influent Waste Influent Waste Stream T139N, R41W, S33, NE
Quarter WS 003 Internal Waste Stream Pond Effluent to
Irrigation
Sites and RIBs T139N, R41W, S33
WS 004 Intermediate: WW to Land Pond Effluent to RIBs T139N,
R41W, S33, NW Quarter of the NW Quarter
WS 005 Intermediate: WW to Land Spray Sites #1 & 2 - 31.13
acres T139N, R41W, S29, NE Quarter of the NE Quarter WS 006
Intermediate: WW to Land Spray Sites #3 & 4 - 22.84 acres
T139N, R41W, S29, SE Quarter of the NE Quarter WS 007 Internal
Waste Stream Mechanical Plant to Polishing
Ponds T139N, R41W, S33, SE Quarter of the NE Quarter
WS 008 Internal Waste Stream Polishing Pond to Chem. PPT
Plant
T139N, R41W, S29, NW Quarter of the NW Quarter
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 9 of 70 Permit modified: 5. Permit
requirements GW 001 Well,
Downgradient
Groundwater Well: Monitoring Requirements 5.1.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.1.2 The Permittee shall submit monitoring results
in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.2.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility. [Minn. R.
7001]
GW 002 Well,
Upgradient
Groundwater Well: Monitoring Requirements 5.3.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.3.2 The Permittee shall submit monitoring results
in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.4.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility. [Minn. R.
7001]
GW 003 Well,
Downgradient
Groundwater Well: Monitoring Requirements 5.5.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.5.2 The Permittee shall submit monitoring results
in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.6.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility. [Minn. R.
7001]
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 10 of 70 Permit modified: GW 004 Well,
Upgradient
Groundwater Well: Monitoring Requirements 5.7.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.7.2 The Permittee shall submit monitoring results
in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.8.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 005 Well,
Upgradient
Groundwater Well: Monitoring Requirements 5.9.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.9.2 The Permittee shall submit monitoring results
in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.10.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 006 Well,
Downgradient
Groundwater Well: Monitoring Requirements 5.11.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.11.2 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.12.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 007 Well,
Downgradient
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 11 of 70 Permit modified: Groundwater Well:
Monitoring Requirements 5.13.1 The Permittee shall submit a monthly
DMR: Due by 21 days after the end of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.13.2 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.14.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 009 Well,
Downgradient
Groundwater Well: Monitoring Requirements 5.15.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.15.2 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.16.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 010 Well,
Downgradient
Groundwater Well: Monitoring Requirements 5.17.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.17.2 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.18.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 011 Well,
Downgradient
Groundwater Well: Monitoring Requirements
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 12 of 70 Permit modified: 5.19.1 The
Permittee shall submit a monthly DMR: Due by 21 days after the end
of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.19.2 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.20.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 012 Well,
Downgradient
Groundwater Well: Monitoring Requirements 5.21.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.21.2 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.22.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 013 Well,
Downgradient
Groundwater Well: Monitoring Requirements 5.23.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.23.2 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.24.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 014 Well,
Downgradient
Groundwater Well: Monitoring Requirements 5.25.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 13 of 70 Permit modified: 5.25.2 The
Permittee shall submit monitoring results in accordance with the
limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.26.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
GW 015 Well,
Downgradient
Groundwater Well: Monitoring Requirements 5.27.1 The Permittee
shall submit a monthly DMR: Due by 21 days after the end of each
calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.27.2 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.28.3 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the groundwater wells. [Minn. R. 7001]
SD 002 Effluent To
Surface Water
Surface Discharge: Class A Major Facility Effluent Requirements
5.29.1 The Permittee shall submit a monthly DMR: Due by 21 days
after the end of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)]
5.29.2 Sampling Location. [Minn. R. 7001.0150, Subp. 2(B)] 5.29.3
Samples for Station SD002 shall be collected from the final outlet
control structure which is the
effluent pipeline. The Total Residual Chlorine, 0.038 milligram
per liter (mg/L) limit has been assigned "Phase 1" in the limits
and monitoring table. Monitoring for this parameter is required
from the effective date of this modification through the time of
initiation of operation of the upgraded facility. The total
phosphorus, 198 kilogram per year (kg/yr) limit has been assigned a
"Phase 2" in the limits and monitoring table. This total phosphorus
limit becomes effective at the time of initiation of operation of
the upgraded facility. [Minn. R. 7001]
5.29.4 The Permittee shall submit monitoring results in
accordance with the limits and monitoring requirements for this
station. If conditions are such that no sample can be acquired, the
Permittee shall report "No Flow" or "No Discharge" on Discharge
Monitoring Report (DMR) and shall add a Comments attachment to the
DMR detailing why the sample was not collected. [Minn. R.
7001.0150, Subp. 2(B)]
Priority Pollutant Requirements
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 14 of 70 Permit modified: 5.30.5 The
Permittee shall monitor the effluent three times in the life of the
permit for the following
specified priority pollutants. Sampling events shall not be less
than one year apart. Monitoring shall be for the organic priority
pollutants identified under the volatile, acid, base/neutral, and
pesticide fractions using EPA methods 624, 625 and 608 (40 CFR Part
136, October 25, 1984) as listed in Table II of 40 CFR Part 122,
Appendix D or any updates to those methods. The following priority
pollutant total metals shall also be monitored using either EPA
method 200.8 or their corresponding graphite furnace method found
in Table IB of 40 CFR Part 136 or any updates to those methods:
antimony, arsenic, beryllium, cadmium, chromium, copper, lead,
nickel, selenium, silver, thallium, and zinc. In addition, the
Permittee shall monitor for Total Cyanide (EPA method 335), Total
Phenolic Compounds (EPA method 420), and Hardness (total as CaCO3)
(EPA method 130). Total Mercury shall be monitored by EPA method
1631 or any update to this method, if not already required by the
permit. [Minn. R. 7001]
5.30.6 The Permittee shall submit the results of the first
sampling event no later than three years prior to the expiration
date of this permit. [Minn. R. 7001]
5.30.7 The Permittee shall submit the results of the second
sampling event no later than two years prior to the expiration date
of this permit. [Minn. R. 7001]
5.30.8 The Permittee shall submit the third priority pollutant
monitoring report: Due 365 calendar days before Permit Expiration
Date. (365 days = 1 year). [Minn. R. 7001]
5.30.9 All Quality Assurance/Quality Control (QA/QC) information
shall be included with each set of priority pollutant results.
[Minn. R. 7001]
Chronic Toxicity Requirements 5.31.10 General Requirements.
[Minn. R. 7001] 5.31.11 The Detroit Lakes WWTF is in the middle of
a Toxicity Reduction Evaluation (TRE) and a Toxicity
Identification Evaluation (TIE). Corrections will be made as a
result of the TRE. Corrections and upgrades will also be made to
the plant because of on-going issues with the stabilization ponds
and a water quality based effluent limit for phosphorus. Because of
the changes due to these issues, Environmental Assessment and
Outcomes (EAO) staff did not perform a reasonable potential
analysis for chronic WET testing related to this facility. Because
this Facility is in a TRE, a WET limit of 1.0 TUc is being set.
However, this limit will not go into effect until after the TRE is
completed and upgrades have been done to the Facility according to
the TRE findings. As that time, the Detroit Lakes WWTF will do
quarterly chronic WET testing for the first year and then annual
chronic WET testing will be required during the remainder of the
permit. Upon initiation of operation of the upgraded Facility, the
Chronic WET testing and reporting requirements will be updated.
[Minn. R. 7001]
5.31.12 Whole Effluent Toxicity Requirement Definitions. [Minn.
R. 7001] 5.31.13 "Chronic Whole Effluent Toxicity (WET) Test is a
static renewal test conducted on an exponentially
diluted series of effluent. The purpose is to calculate
appropriate biological effect endpoints (NOEC or IC25), specified
in the referenced chronic manual. A statistical effect level less
than the Receiving Water Concentration (RWC) constitutes a positive
test for chronic toxicity. The RWC equals the 100 percent effluent
concentration or 1 TUc. [Minn. R. 7001]
5.31.14 "Chronic toxic unit (TUc)" is the reciprocal of the
effluent dilution that causes no unacceptable effect on the test
organisms by the end of the chronic exposure period. For example, a
TUc equals [7Q10flow (mgd) + effluent average dry weather flow
(mgd)]/[effluent average dry weather flow (mgd)]. [Minn. R.
7001]
5.31.15 "Test" refers to an individual species. [Minn. R. 7001]
5.31.16 "Test Battery" consists of WET testing of all test species
for the specified test. For chronic WET
testing, all test species includes fathead minnows and
Ceriodaphnia Dubia. [Minn. R. 7001] Facility Specific
Requirements
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 15 of 70 Permit modified: 5.32.17 At the time
of initiation of operation of the upgraded facility, the Permittee
has agreed to accept
frozen mass limits on the following parameters: total suspended
solids, 5-day carbonaceous biochemical oxygen demand (CBOD5), and
total phosphorus. By accepting frozen mass limits, an
anti-degradation review is not needed as there will be no net
increase in mass loading for these parameters. [Minn. R. 7001]
WS 002 Influent Waste Waste Stream: Class A Major Facility
Influent Requirements 5.33.1 The Permittee shall submit a monthly
DMR: Due by 21 days after the end of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)]
5.33.2 Sampling Location. [Minn. R. 7001.0150, Subp. 2(B)] 5.33.3
Influent grab and composite samples for Station WS002 at the
existing Facility shall be collected
immediately following the bar screen. Upon initiation of
operation of the upgraded Facility, samples for Station WS002 will
need to be collected immediately upstream of the Facility. [Minn.
R. 7001]
5.33.4 The Permittee shall submit monitoring results in
accordance with the limits and monitoring requirements for this
station. If conditions are such that no sample can be acquired, the
Permittee shall report "No Flow" or "No Discharge" on Discharge
Monitoring Report (DMR) and shall add a Comments attachment to the
DMR detailing why the sample was not collected. [Minn. R.
7001.0150, Subp. 2(B)]
WS 003 Internal Waste
Stream
Waste Stream: Spray Irrigation Pond Effluent Requirements 5.34.1
The Permittee shall submit a monthly DMR: Due by 21 days after the
end of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.34.2 Sampling Location. [Minn. R. 7001.0150,
Subp. 2(B)] 5.34.3 Samples for Station WS003 shall be collected
prior to discharge to the rapid infiltration basins and
the irrigation sites. [Minn. R. 7001.0150, Subp. 2(B)] 5.34.4
The Permittee shall submit monitoring results in accordance with
the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.35.5 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
discontinuation of the spray irrigation sites and rapid
infiltration basins. [Minn. R. 7001]
WS 004 Intermediate:
WW to Land
Facility Specific Limit and Monitoring Requirements 5.36.1 The
Permittee shall submit a monthly DMR: Due by 21 days after the end
of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.36.2 Sampling Location. [Minn. R. 7001.0150,
Subp. 2(B)] 5.36.3 Flow measurements for Station WS004 shall be
collected during discharge to the rapid infiltration
basins. [Minn. R. 7001.0150, Subp. 2(B)] 5.36.4 The Permittee
shall submit monitoring results in accordance with the limits and
monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 16 of 70 Permit modified: Facility Specific
Requirements 5.37.5 The parameters required to be monitored for in
this station have been assigned a "Phase 1" in the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
discontinuation of use of the rapid infiltration basins. [Minn. R.
7001]
WS 005 Intermediate:
WW to Land
Waste Stream: Spray Irrigation to Spray Site Requirements 5.38.1
The Permittee shall submit a monthly DMR: Due by 21 days after the
end of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.38.2 Sampling Location. [Minn. R. 7001.0150,
Subp. 2(B)] 5.38.3 Flow measurements for Station WS005 shall be
collected during discharge to irrigation sites #1 and
#2. [Minn. R. 7001] 5.38.4 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.39.5 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
discontinuation of use of the spray irrigation sites. [Minn. R.
7001]
WS 006 Intermediate:
WW to Land
Waste Stream: Spray Irrigation to Spray Site Requirements 5.40.1
The Permittee shall submit a monthly DMR: Due by 21 days after the
end of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.40.2 Sampling Location. [Minn. R. 7001.0150,
Subp. 2(B)] 5.40.3 Flow measurements for Station WS006 shall be
collected during discharge to irrigation sites #3 and
#4. [Minn. R. 7001] 5.40.4 The Permittee shall submit monitoring
results in accordance with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.41.5 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
discontinuation of use of the spray irrigation sites. [Minn. R.
7001]
WS 007 Internal Waste
Stream
Facility Specific Limit and Monitoring Requirements 5.42.1 The
Permittee shall submit a monthly DMR: Due by 21 days after the end
of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.42.2 Sampling Location. [Minn. R. 7001.0150,
Subp. 2(B)]
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 17 of 70 Permit modified: 5.42.3 Samples for
Station WS007 shall be collected at the effluent pumping station
after the chlorine
contact tank and prior to the 3-acre pond cell. [Minn. R. 7001]
5.42.4 The Permittee shall submit monitoring results in accordance
with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.43.5 Flow from the mechanical
plant to the polishing ponds shall be calculated by taking the
total influent
to the WWTF and subtracting the biosolids removed. [Minn. R.
7001] 5.43.6 The parameters required to be monitored for in this
station have been assigned a "Phase 1" in the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
discontinuation of the internal waste stream from the existing
mechanical plant to the polishing ponds. [Minn. R. 7001]
WS 008 Internal Waste
Stream
Facility Specific Limit and Monitoring Requirements 5.44.1 The
Permittee shall submit a monthly DMR: Due by 21 days after the end
of each calendar month
following permit issuance. [Minn. R. 7001.0150, Subp. 2(B)],
Phases: Phase 1 5.44.2 Sampling Location. [Minn. R. 7001.0150,
Subp. 2(B)] 5.44.3 Flow measurements for Station WS008 shall be
collected after the 25-acre pond cell and prior to the
chemical precipitation plant. [Minn. R. 7001.0150, Subp. 2(B)]
5.44.4 The Permittee shall submit monitoring results in accordance
with the limits and monitoring
requirements for this station. If conditions are such that no
sample can be acquired, the Permittee shall report "No Flow" or "No
Discharge" on Discharge Monitoring Report (DMR) and shall add a
Comments attachment to the DMR detailing why the sample was not
collected. [Minn. R. 7001.0150, Subp. 2(B)]
Facility Specific Requirements 5.45.5 The parameters required to
be monitored for in this station have been assigned a "Phase 1" in
the
limits and monitoring table. Monitoring for these parameters are
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
discontinuation of the internal waste stream from the polishing
ponds to the chemical precipitant plant. [Minn. R. 7001]
MN0020192 Detroit Lakes
WWTP
Groundwater Station General Requirements 5.46.1 Analysis
Requirements. [Minn. R. 7001] 5.46.2 If monitoring is required for
Dissolved Oxygen, pH, Specific Conductance, Temperature and
Total
Residual Chlorine, the analyses shall be conducted within 15
minutes of sample collection. [Minn. R. 7001]
5.46.3 Monitoring Wells. [Minn. R. 7001] 5.46.4 The Permittee
shall install, maintain and abandon groundwater monitoring wells
according to the
Minnesota Water Well Construction Code, Minnesota Rules, ch.
4725. Damaged or improperly constructed monitoring wells shall be
repaired or properly abandoned and replaced. Information on
licensed water well contractors is available from the Minnesota
Department of Health. [Minn. R. 4725]
5.46.5 Each monitoring well shall be clearly numbered on the
outside of the well with either indelible paint or an inscribed
number. [Minn. R. 7001]
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 18 of 70 Permit modified: 5.46.6 The
monitoring wells shall be sampled in accordance with "Minnesota
Pollution Control Agency,
Water Quality Division: Sampling Procedures for Ground Water
Monitoring Wells, July 1997, Reviewed and re-approved September
2006" or any updates to this document. A copy of this publication
is available on the MPCA website at: http://www.pca.state.mn.us.
[Minn. R. 7001]
5.46.7 Grab samples shall be collected at all ground water
monitoring points (lysimeters or wells) after stabilization tests
are conducted. [Minn. R. 7001]
5.46.8 Prior to well purging and sampling, depths to groundwater
shall be measured to the nearest 0.01 foot below the top of the
well casing, and groundwater elevations shall be reported to the
nearest 0.01 foot above mean sea level. [Minn. R. 7001]
5.46.9 Temperature, specific conductance and pH shall be
reported as the final field measurements from well stabilization.
If the analytical results for pH, temperature, total chloride, or
total nitrite plus nitrate (as N) are above applicable drinking
water standards, further testing will be required. [Minn. R.
7001]
Surface Discharge Station General Requirements 5.47.10 Analysis
Requirements. [Minn. R. 7001] 5.47.11 If monitoring is required for
Dissolved Oxygen, pH, Specific Conductance, Temperature and
Total
Residual Chlorine, the analyses shall be conducted within 15
minutes of sample collection. [Minn. R. 7001]
5.47.12 Representative Samples. [Minn. R. 7001] 5.47.13 Samples
and measurements required by this permit shall be representative of
the monitored
activity. [Minn. R. 7001] 5.47.14 Surface Discharge
Prohibitions. [Minn. R. 7001] 5.47.15 Floating solids or visible
foam shall not be discharged in other than trace amounts. [Minn. R.
7001] 5.47.16 Oil or other substances shall not be discharged in
amounts that create a visible color film. [Minn. R.
7001] 5.47.17 The Permittee shall install and maintain outlet
protection measures at the discharge stations to
prevent erosion. [Minn. R. 7001] 5.47.18 Winter Sampling
Conditions. [Minn. R. 7001] 5.47.19 The Permittee shall sample
flows at the designated monitoring stations including when this
requires
removing ice to sample the water. If the station is completely
frozen throughout a designated sampling month, the Permittee shall
check the "No Discharge" box on the Discharge Monitoring Report
(DMR) and note the ice conditions in Comments on the DMR. [Minn. R.
7001]
5.47.20 Phosphorus Limits and Monitoring Requirements. [Minn. R.
7001] 5.47.21 Phosphorus Calculation Definitions. [Minn. R. 7001]
5.47.22 "12-Month Moving Average" is a rolling average. To
calculate, add all of the monthly average values
during the last 12 months and divide by 12. [Minn. R. 7001]
5.47.23 "12-Month Moving Total" is a rolling total. To calculate,
for each month multiply the total volume of
effluent flow (MG) by the monthly average concentration and by a
3.785 conversion factor to get kg/month. Then add all of the
monthly values (kg/mo) during the last twelve months, starting with
the monthly total for the month of the current reporting period.
[Minn. R. 7001]
5.47.24 Mercury Limits and Monitoring Requirements. [Minn. R.
7001] 5.47.25 Permittees are required to sample for TSS (grab
sample) at the same time that Total/Dissolved
Mercury samples are taken. Total Mercury, Dissolved Mercury, and
TSS (grab sample) samples shall be collected via grab samples. All
results shall be recorded on DMRs. [Minn. R. 7001]
5.47.26 Total and Dissolved Mercury samples shall be analyzed
using the most current versions of EPA Method 1631 with clean
techniques method 1669. Should another mercury analytical method
that has a reportable quantitation level of
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 19 of 70 Permit modified: 5.47.28 "Total
Nitrogen" is to be reported as the summation of the Total Kjeldahl
Nitrogen and Total Nitrite
plus Nitrate Nitrogen values. [Minn. R. 7001] Waste Stream
Station General Requirements 5.48.29 Analysis Requirements. [Minn.
R. 7001] 5.48.30 If monitoring is required for Dissolved Oxygen,
pH, Specific Conductance, Temperature and Total
Residual Chlorine, the analyses shall be conducted within 15
minutes of sample collection. [Minn. R. 7001]
5.48.31 Representative Samples. [Minn. R. 7001] 5.48.32 Grab and
composite samples shall be collected at a point representative of
total influent flow to the
system. [Minn. R. 7001] 5.48.33 Mercury Limits and Monitoring
Requirements. [Minn. R. 7001] 5.48.34 Total Mercury samples shall
be grab samples and shall be analyzed using EPA Method 1631
with
clean techniques method 1669 and any revisions to those methods.
Should another mercury analytical method that has a reportable
quantitation level that allows for low-level sample
characterization be approved by the EPA and certified by the
Minnesota Department of Health, the Permittee is authorized to use
that method. [Minn. R. 7001]
5.48.35 Nitrogen Limits and Monitoring Requirements. [Minn. R.
7001] 5.48.36 "Total Nitrogen" is to be reported as the summation
of the Total Kjeldahl Nitrogen and Total Nitrite
plus Nitrate Nitrogen values. [Minn. R. 7001] Compliance
Construction Schedule 5.49.37 Definitions. [Minn. R. 7001] 5.49.38
"Initiation of operation" means the date that MPCA determines all
components of the wastewater
treatment system are complete and functioning and the project
begins operating for the purposes for which it was planned,
designed, and built. [State Definitions]
5.49.39 "Completion of construction" means all the construction
is complete except for minor weather-related components and
conforms to the approved plans and specifications and change
orders. [State Definitions]
5.49.40 "Notice to proceed" means a written notice given by the
Permittee to the contractor that affixes the contract effective
date and the date that the contractor begins performing the work
specified in the contract documents. [State Definitions]
5.49.41 Schedule. [Minn. R. 7001] 5.49.42 Total Phosphorus Water
Quality Based Effluent Limit
Currently, the Permittee discharges its treated wastewater to
St. Claire Lake in the winter. St. Claire Lake was placed on the
Federal 303(d) list of impaired waters in 2006 for eutrophication
due to excess phosphorus. Because the Permittee's discharge has
reasonable potential to cause or contribute to the impairment of
St. Claire Lake, a water quality based effluent limit (WQBEL) is
required. The MPCA has required a 198 kilogram per year (kg/yr)
limit for the Facility's discharge. The current Facility is not
designed to meet this level of treatment at the design average wet
weather flow. Significant capital improvements will be necessary to
achieve compliance with the required limit. A compliance schedule
was placed in the 2014 reissued permit to accommodate the time
required to secure funding, evaluate discharge alternatives,
design, and build for advanced nutrient removal technology. This
permit modification incorporates the selected discharge alternative
and the construction of the upgraded Facility. The Permittee has
chosen to upgrade their existing treatment Facility and will
include two rotary mechanical screens with six millimeter openings,
a new vortex grit chamber, two rotary mechanical fine screens with
two millimeter openings, two equalization tanks, an activated
sludge system with no clarifier (the activated sludge system will
have anaerobic, anoxic and oxic zones), a four-train membrane
bio-reactor (MBR) system that specializes in the advanced removal
of nutrients, and ultraviolet (UV) disinfection as backup
disinfection process. The existing two anaerobic digesters will
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 20 of 70 Permit modified:
be converted to aerobic digesters with sludge pre-thickening.
The project also includes dewatering by centrifuge and cake storage
of biosolids. The proposed Facility upgrade will result in an
Average Wet Weather (AWW) design flow increase to 2.21 mgd. The
upgraded Facility will utilize their currently permitted surface
discharge location (SD002) as the location for the total Facility
effluent. Upon initiation of operation, the Facility will abandon
the currently permitted spray irrigation fields, rapid infiltration
basins, and will decommission both of the existing polishing ponds.
The Permittee must attain compliance with the 198 kg/yr total
phosphorus limit as soon as possible, but no later than October 1,
2022. [Minn. R. 7001]
5.49.43 By October 31, 2017, the Permittee shall complete the
following processes as needed to address the upgrade for the WWTF;
obtain appropriate and necessary right-of-ways, acquire land as
appropriate and necessary, and obtain any and all required local
permits and approvals as necessary. By this same date, the
Permittee shall submit a report describing the results of each of
these processes to the MPCA. The Permittee shall submit a report:
Due before 10/31/2017. [Minn. R. 7001]
5.49.44 The Permittee shall submit applicable funding
application (reapplication) documents to the Minnesota Public
Facility Authority by March 3, 2018 for fiscal year 2018 funding.
The Permittee shall submit a notification of completion to the MPCA
by this same date. The Permittee shall submit a notification: Due
before 03/03/2018. [Minn. R. 7001]
5.49.45 The Permittee shall complete the bid advertisement,
receive bids, and award a construction contract no later than May
1, 2018. Notify the MPCA in writing of the name and contact
information of the company that will perform the construction work.
The Permittee shall notify MPCA: Due before 05/01/2018. [Minn. R.
7001]
5.49.46 By June 30, 2018, the Permittee shall submit a report to
the MPCA describing all influent total phosphorus reduction actions
taken and describe any changes in the influent sampling results
from permit issuance until the present time. Included in this
report shall be an analysis of how these actions and this data was
used in determining the appropriate design of the upgraded
treatment facility. The Permittee shall submit a report: Due before
06/30/2018. [Minn. R. 7001]
5.49.47 The Permittee shall begin construction of the upgraded
facility no later than December 1, 2018. Notify the MPCA in writing
within 14 days that construction started. The Permittee shall begin
construction: Due before 12/01/2018. [Minn. R. 7001]
5.49.48 The Permittee shall submit a construction progress
report to the MPCA by December 1, 2019. The Permittee shall submit
a progress report : Due before 12/01/2019. [Minn. R. 7001]
5.49.49 The Permittee shall submit a construction progress
report to the MPCA by December 1, 2020. The Permittee shall submit
a progress report : Due before 12/01/2020. [Minn. R. 7001]
5.49.50 The Permittee shall submit a construction progress
report to the MPCA by December 1, 2021. The Permittee shall submit
a progress report : Due before 12/01/2021. [Minn. R. 7001]
5.49.51 The Permittee shall submit a Pond Decommissioning Plan,
for MPCA review by April 1, 2022. The pond decommissioning plan
shall include a detailed description of the proposed work necessary
to decommission the pond and include a proposed schedule for
completion of each step. The plan shall include but not be limited
to: a. A proposal to determine the volume, quality, and method of
final disposal of all wastewater liquids; b. A description of the
method of final disposal of all biosolids; i. A plan for final
sampling and anlaysis of biosolids; ii. A plan for determining the
final quantity of biosolids to be disposed. iii. If biosolids will
be land applied, the plan shall include. 1. a schedule to employ a
Type IV Operator to manage the land application activities; 2. a
determination of how much land will be needed based on nitrogen
application rates; 3. a description of how pathogen and vector
attraction reduction requirements will be met; 4. land application
site approval applications shall be submitted as part of the plans
and specifications; c. A description of the final disposal of all
facility structures including buildings, tanks, ponds, pipes,
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 21 of 70 Permit modified:
equipment, etc. d. Description of the final use of the existing
site and any retained structures; e. A schedule for completion of
all clean out activities. f. A detailed description of the work
required to be completed for decommissioning or relining a
wastewater pond facility can be found on the MPCA web site at:
http://www.pca.state.mn.us/index.php/view-document.html?gid=14958
i. Preliminary Assessment and Characterization 1. Estimate of the
volume of biosolids on both a liquid and dry tons basis. 2.
Sampling plan to determine the chemical characteristics. ii.
Methods to be used to collect samples to estimate the quantity of
biosolids on both a liquid and dry tons basis. iii. Biosolids
characterization sampling plan. Biosolids sampling shall be
conducted to establish the general quality of the material. A
minimum of one sample per six acres of pond area shall be taken.
For ponds less than six acres, at least two composite samples shall
be taken. iv. Each composite sample shall be composed of a minimum
of ten sub-samples. v. The sub-samples shall be taken from the
biosolids layer only. vi. Composite samples shall be analyzed for
total solids, volatile solids, Kjeldahl nitrogen, ammonia nitrogen,
arsenic, cadmium, copper, lead, mercury, molybdenum, nickel,
selenium, zinc, and PCB's. Samples from secondary ponds, or ponds
built after 1984 do not require PCB analysis. vii. A description of
how the ponds will be dewatered; viii. A description of how the
biosolids will be removed from the pond. The Permittee shall submit
a plan: Due before 04/01/2022. [Minn. R. 7001]
5.49.52 The Permittee shall complete construction by May 1,
2022. Notify the MPCA in writing within 14 days of the completion
of construction. The Permittee shall complete construction : Due
before 05/01/2022. [Minn. R. 7001]
5.49.53 The Permittee shall initiate operation of the upgraded
facility by July 1, 2022. Notify the MPCA in writing within 14 days
of initiation of operation that the upgraded facility is on-line.
The Permittee shall initiate operation : Due before 07/01/2022.
[Minn. R. 7001]
5.49.54 The Permittee shall attain compliance with final limits
by October 1, 2022. The Permittee shall attain compliance with
final limits : Due before 10/01/2022. [Minn. R. 7001]
5.49.55 The Permittee shall abandon and seal all groundwater
monitoring wells pursuant to MN Rule ch. 4725 within one (1) year
after initiation of operation of the upgraded Facility and after
the irrigation sites, RIB cells, and polishing pond have been
abandoned. The Permittee shall abandon monitoring well and submit
seal record to MPCA : Due 365 calendar days after 10/01/2022.
[Minn. R. 7001]
5.49.56 The Permittee shall submit final technical documents to
the MPCA within one year after the initiation of operation date.
The Permittee shall submit final technical documents : Due by one
year after the initiation of operation date. [Minn. R. 7001]
Compliance Schedule Requirements 5.50.57 Chloride
Identification/Reduction Plan. [Minn. R. 7001] 5.50.58 Currently
the Detroit Lakes Wastewater Treatment Facility has reasonable
potential to exceed water
quality standards (WQS) for total chloride. A recent review of
data indicates that effluent and influent total chloride
concentrations are both consistently above the 230 milligrams per
liter (mg/L) WQS. While the proposed upgraded Facility is expecting
to have an immediate reduction in total chloride concentrations
upon initiation of operation, the new Facility will not be capable
of treating total chloride. Due to this, the proposed upgraded
wastewater treatment facility will continue to have reasonable
potential and will require an effluent limit protective of the 230
mg/L WQS. The effluent limit for the Facility will be 1619
kilograms per day (kg/day) and 230 mg/l as a calendar month average
and 267 mg/L as a daily maximum. The Permittee shall meet the final
total chloride limits for surface discharge station SD002 as soon
as possible but no later than June 30, 2033. A compliance schedule
has been included in the permit addressing the Permittee's unique
water and
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 22 of 70 Permit modified:
wastewater circumstances. Chloride monitoring to date has shown
chloride concentrations in the plant influent have trended down
since monitoring started in 2007; the compliance schedule requires
the Permittee to monitor the trend prior to and after initiation of
operation of the upgraded Facility. The Permittee is in the process
of implementing significant improvements at the Facility.
Recognizing that the improvements will have some effect on the
chloride concentrations in the plant effluent (due to changes in
chemical feed and treatment processes), full investigation of
chloride treatment alternatives cannot be addressed until the
effluent from the upgraded Facility is characterized with respect
to chlorides. The compliance schedule outlines an implementation
program requiring the Permittee to characterize the influent
chloride sources and develop public education strategies prior to a
thorough Chloride Monitoring Program based upon the effluent to the
upgraded Facility. Additionally, the Permittee has stated it is not
financially capable of making a significant capital improvement
addressing chlorides as the existing debt service on the water
plant carries into 2030 and the new wastewater plant debt service
will extend into 2037. [Minn. R. 7001]
5.50.59 By August 15, 2018, the Permittee shall submit a summary
(review) of influent monitoring, identifying concentrations and
flows from significant users, the Facility influent, and raw
wastewater characteristics. The Permittee shall submit review : Due
before 08/15/2018. [Minn. R. 7001]
5.50.60 By August 15, 2019, the Permittee shall complete a
desktop influent chloride mass balance and submit a summary report
identifying sources of chlorides and potential source reduction
activities. The mass balance shall be based on monitoring for one
year. The Permittee shall submit report : Due before 08/15/2019.
[Minn. R. 7001]
5.50.61 By August 15, 2020, the Permittee shall submit a public
education strategy plan identifying education campaigns over the
next three years that will help make the public aware of the
chloride issue and identify opportunities for community members to
help the Permittee reduce chlorides. The public education strategy
plan shall contain a list of campaign efforts and timelines. The
Permittee shall submit a plan : Due before 08/15/2020. [Minn. R.
7001]
5.50.62 By August 15, 2020, the Permittee shall incorporate
chloride user agreements for any industry or other user based on
influent monitoring. [Minn. R. 7001]
5.50.63 By August 15, 2021, the Permittee shall identify inflow
and infiltration (I/I) projects that may help to reduce the
seasonal loading of chlorides. [Minn. R. 7001]
5.50.64 By August 15, 2022, the Permittee shall provide the MPCA
a summary report of collaboration between the City of Detroit Lakes
Water and Wastewater Departments that will identify the future goal
of chloride reduction and steps for planning for the future goal
accordingly. The Permittee shall submit a report : Due before
08/15/2022. [Minn. R. 7001]
5.50.65 By December 31, 2022, the Permittee shall complete a
Softener Audit and submit a summary report to the MPCA. The audit
will coincide with the system-wide replacement of water meters
scheduled for completion in 2022, where meter installers will note
softener type. The Permittee shall provide softener management
guidelines to homeowners. This will help the Permittee understand
the number of softeners and those that are newer/auto-regenerate.
The Permittee shall submit a report : Due before 12/31/2022. [Minn.
R. 7001]
5.50.66 By August 15, 2023, the Permittee shall submit a
Chloride Monitoring Report summarizing influent and effluent
monitoring. Updated influent monitoring will quantify the impact of
any source reductions resulting from the previous steps of this
compliance schedule, such as industrial user reductions and public
education. Effluent monitoring will provide the first data set with
the new Facility online to quantify the impact the upgraded
treatment Facility has on chloride concentrations. The results of
this phase of monitoring will provide the basis of design for
strategies addressing chloride concentrations. The Permittee shall
update the chloride mass balance as necessary. The Permittee shall
submit a report : Due before 08/15/2023. [Minn. R. 7001]
5.50.67 By August 15, 2024, the Permittee shall establish a
Citizen's Advisory Committee comprised of SIUs, lake associations,
and larger commercial users to lead efforts for the remainder of
the compliance schedule. [Minn. R. 7001]
5.50.68 By August 15, 2025, the Permittee shall evaluate the
potential need for a water softener replacement program including
identifying approaches to enact water softener replacement
requirements. The Permittee shall submit a summary report to the
MPCA. The Permittee shall submit a report : Due before 08/15/2025.
[Minn. R. 7001]
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 23 of 70 Permit modified: 5.50.69 By August
15, 2026, the Permittee shall submit a recycled water assessment
report to the MPCA.
The recycled water assessment will evaluate potential recycled
water uses to aid in the reduction of the chloride load. The
Permittee shall submit report : Due before 08/15/2026. [Minn. R.
7001]
5.50.70 By August 15, 2027, the Permittee shall submit to the
MPCA a high-level cost estimate (review) for a water softening
facility to understand the impact to users. The Permittee shall
submit review : Due before 08/15/2027. [Minn. R. 7001]
5.50.71 By August 15, 2028, the Permittee shall submit to the
MPCA a Chloride Reduction and Compliance Plan summarizing the
reductions made to date, the findings of the water softener
replacement program, the recycled water assessment, and the water
softening facility. The Chloride Reduction and Compliance Plan
shall also include a timeline that leads to final compliance with
the water quality based effluent limits by June 30, 2033. The
Permittee shall submit a plan : Due before 08/15/2028. [Minn. R.
7001]
5.50.72 Chloride Progress Reports The Permittee shall submit to
the MPCA a progress report following the submission of the Chloride
Reduction and Compliance Plan identifying progress with
implementing the recommendations from the plan. The first progress
report shall be submitted by December 31, 2028, and on an annual
basis thereafter. The annual progress reports shall include, but
are not limited to: a. A summary of all the activities that the
Permittee completed during the 12 month period; and b. A schedule
of activities the Permittee will complete within the next 12 month
period. The Permittee shall submit a progress report : Due before
12/31/2028 annually thereafter. [Minn. R. 7001]
Mercury Minimization Plan 5.51.73 The Permittee is required to
complete and submit a Mercury Pollutant Minimization Plan (MMP)
to
the MPCA as detailed in this section. If the Permittee has
previously submitted a MMP, it shall update its MMP and submit the
updated MMP to the MPCA. The purpose of the MMP is to evaluate
collection and treatment systems to determine possible sources of
mercury as well as potential mercury reduction options. Guidelines
for developing a MMP are detailed in this section. [Minn. R.
7001]
5.51.74 The specific mercury monitoring requirements are
detailed in the limits and monitoring section of this permit.
Information gained through the MMP process can be used to reduce
mercury concentrations. As part of its mercury control strategy,
the Permittee should consider selecting activities based on the
potential of those activities to reduce mercury loadings to the
wastewater treatment facility. [Minn. R. 7001]
5.51.75 The Permittee shall submit a Mercury Minimization Plan
by 180 days after permit issuance. [Minn. R. 7001]
5.51.76 At a minimum, the MMP shall include the following: a. A
summary of mercury influent and effluent concentrations and
biosolids monitoring data using the most recent five years of
monitoring data, if available. b. Identification of existing and
potential sources of mercury concentrations and/or loading to the
facility. As appropriate for your facility, you should consider
residential, institutional, municipal, and commercial sources (such
as dental clinics, hospitals, medical clinics, nursing homes,
schools, laundries, and industries with potential for mercury
contributions). You should also consider other influent mercury
sources, such as stormwater inputs, ground water (inflow &
infiltration) inputs, lift station components, and waste streams or
sewer tributaries to the wastewater treatment facility. c. An
evaluation of past and present WWTF operations to determine those
operating procedures that maximize mercury removal. d. A summary of
any mercury reduction activities implemented during the last five
years.
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 24 of 70 Permit modified:
e. A plan to implement mercury management and reduction measures
during the next five years. [Minn. R. 7001]
Spray Irrigation 5.52.77 Authorization. [Minn. R. 7001] 5.52.78
This chapter authorizes the Permittee to apply treated wastewater,
as described in the 'Facility
Description' section of this permit, to land application sites
using a spray irrigation system. This activity is limited by the
'Limits and Monitoring' section of this permit, as well as the
other terms and conditions of this permit. [Minn. R. 7001.0150,
3(E)]
5.52.79 Wastewater Land Application System Management. [Minn. R.
7001] 5.52.80 The wastewater flow to a land application site shall
not have physical or chemical characteristics
that prevent the proper operation of the land disposal system.
The wastewater shall be free of material that interferes with the
operation of nozzles, orifices or flow measurement devices. [Minn.
R. 7001.0150, 3(F)]
5.52.81 Wastewater shall be applied so as not to harm vegetation
and so that prolonged saturated soil conditions do not develop due
to the application. Wastewater shall not be applied during
precipitation periods. [Minn. R. 7001.0150, 3(F)]
5.52.82 A cover crop shall be maintained on the sprayfield
during the entire application season unless otherwise approved by
the MPCA. [Minn. R. 7001.0150, 3(F)]
5.52.83 Wastewater shall not be applied after the cover crop has
become dormant as a result of frost or below freezing temperatures.
[Minn. R. 7001.0150, 3(F)]
5.52.84 The Permittee shall prevent the surface runoff of
wastewater, and precipitation runoff mixed with wastewater, from
the land application site(s). The Permittee shall provide runoff
collection and re-application systems as appropriate to prevent the
discharge of surface runoff. [Minn. R. 7001.0150, 3(F)]
5.52.85 If odor or aerosol drift resulting from operation of the
wastewater disposal system creates a nuisance condition, the
Permittee shall immediately take appropriate action to control or
abate the odor or aerosol drift. The Permittee shall notify the
MPCA of a nuisance condition within five (5) days of discovery.
[Minn. R. 7001.0150, 3(F)]
5.52.86 Tile inlets shall be capped during spray irrigation
events. [Minn. R. 7001.0150, 3(F)] 5.52.87 Best management
practices shall be utilized for all crops. The Permittee shall
utilize the facility's
Operation and Maintenance Manual, the Sprayfield Management
Plan, and the most recent recommendations of the Minnesota
Extension Service, University of Minnesota, for managing nitrogen
for crop production on irrigated soils. Soil test results shall
also be utilized for fertilizer recommendations. [Minn. R.
7001.0150, 3(F)]
5.52.88 If any changes are made to the facilities permitted
spray irrigation site the Permittee is required to notify the MPCA
and update the facilities sprayfield management plan. This plan
shall be kept on-site and made available upon MPCA request. [Minn.
R. 7001.0150, 3(F)]
5.52.89 Spray Irrigation Outside of Acceptable Land Application
Periods. [Minn. R. 7001] 5.52.90 If conditions require spray
irrigation outside of the effective period designated in the limits
and
monitoring section of this permit or if an emergency condition
exists, the Permittee shall submit to the MPCA the "Spray
Irrigation/Rapid Infiltration Basin Discharge Not Authorized Within
Permit" form found on the MPCA's website at:
http://www.pca.state.mn.us/index.php/water/water-types-and-programs/wastewater/index.html.
The form shall be submitted to the MPCA at least two weeks prior to
needing to spray irrigate. [Minn. R. 7001.0150, 3(F)]
5.52.91 Reporting. [Minn. R. 7001] 5.52.92 The Permittee shall
submit a land application of wastewater annual report : Due by
January 21 of
each year following permit issuance. [Minn. R. 7001.0150, 3(F)]
5.52.93 The Land Application of Wastewater Annual Report shall
include the following information:
a. A description of the treatment system, including any changes
made during the year. b. A description of system operation during
the past year, including the following: i. nutrient and hydraulic
loading;
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 25 of 70 Permit modified:
ii. irrigation scheduling and intensity; iii. crop harvesting;
and iv. problems encountered and any remedial actions. c. A
description of system maintenance during the past year, including
the following: i. crop types and yields; and ii. irrigation
equipment. d. A summarization of monitoring results obtained during
the past year from the soil monitoring requirements. e. An analysis
of the information submitted, and recommendations for changes,
including the following: i. analysis of the year's operation; and
ii. proposed changes for the coming year's operation. [Minn. R.
7001.0150, 3(F)]
Spray Irrigation: Soils 5.53.94 Sampling Location. [Minn. R.
7001] 5.53.95 Samples for Station LA319 shall be collected from
irrigation sites #1 and #2.
Samples for Station LA320 shall be collected from irrigation
sites #3 and #4. Monitoring as these land application sites is
required from the effective date of this modification through the
time of initiation of operation of the upgraded facility and
abandonment of the spray irrigation sites. [Minn. R. 7001]
5.53.96 Soil Samples. [Minn. R. 7001] 5.53.97 Soil samples shall
be taken in the spring before the first irrigation and before the
first application of
commercial or other supplemental fertilizer for that year.
[Minn. R. 7001.0150, 2(B)] 5.53.98 Soil samples shall be a
composite of a mixture of 15 to 20 equally proportioned subsamples
taken
from a 0- to 8-inch core. At least one composite sample shall be
collected for each 40 acres on the permitted land application site.
[Minn. R. 7001.0150, 2(B)]
5.53.99 Application Rates. [Minn. R. 7001] 5.53.100 Nitrogen and
sodium land application rate limits apply to the sum of all sources
of nitrogen or
sodium applied to a permitted application site. [Minn. R.
7001.0150, 3(F)] 5.53.101 If nitrogen or sodium are applied to a
permitted land application site from other sources including
commercial fertilizer, manure, silage, sewage or wastewater
treatment solids and sludges, then these other nitrogen or sodium
sources shall be included in the sum of nitrogen or sodium applied
to determine compliance with application rate limits at that site.
[Minn. R. 7001.0150, 3(F)]
5.53.102 The nitrogen application rate shall be calculated as
the sum of the total annual mass Kjeldahl nitrogen and
nitrate-plus-nitrite nitrogen applied to the site, divided by the
acreage of the site. [Minn. R. 7001.0150, 3(F)]
Pond System 5.54.103 Ponds - Observations. [Minn. R. 7001]
5.54.104 The Permittee shall inspect the pond system weekly, and
shall take measurements of pond water
depth, estimate the coverage of aquatic plants, floating mats
and ice cover on the surface of the ponds, and note odors, the
condition of the dikes and the presence of muskrats. The Permittee
shall maintain records of these weekly inspections for the last
three (3) years, and submit the results on the Discharge Monitoring
Report (DMR) supplemental form. [Minn. R. 7001.0150, 3(F)]
5.54.105 The Permittee shall maintain daily precipitation
records. [Minn. R. 7001.0150, 3(F)] Mechanical System 5.55.106
Bypass Structures. [Minn. R. 7001] 5.55.107 All structures capable
of bypassing the treatment system shall be manually controlled and
kept
locked at all times. [Minn. R. 7001.0030] 5.55.108 Sanitary
Sewer Extension Permit. [Minn. R. 7001]
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 26 of 70 Permit modified: 5.55.109 The
Permittee may be required to obtain a Sanitary Sewer Extension
Permit from the MPCA for any
addition, extension or replacement to the sanitary sewer. If a
sewer extension permit is required, construction may not begin
until plans and specifications have been submitted and a written
permit is granted except as allowed in Minn. Stat. 115.07, Subd.
3(b). [Minn. R. 7001.0020, D]
5.55.110 Operator Certification. [Minn. R. 7001] 5.55.111 The
Permittee shall provide a Class A state certified operator who is
in direct responsible charge of
the operation, maintenance and testing functions required to
ensure compliance with the terms and conditions of this permit.
[Minn. R. 9400]
5.55.112 The Permittee shall provide the appropriate number of
operators with a Type IV certification to be responsible for the
land application of biosolids or semisolids from commercial or
industrial operations. [Minn. R. 7001]
5.55.113 If the Permittee chooses to meet operator certification
requirements through a contractual agreement, the Permittee shall
provide a copy of the contract to the MPCA, WQ Submittals Center.
The contract shall include the certified operator's name,
certificate number, company name if appropriate, the period covered
by the contract and provisions for renewal; the duties and
responsibilities of the certified operator; the duties and
responsibilities of the permittee; and provisions for notifying the
MPCA 30 days in advance of termination if the contract is
terminated prior to the expiration date. [Minn. R. 9400]
5.55.114 The Permittee shall notify the MPCA within 30 days of a
change in operator certification or contract status. [Minn. R.
9400]
Rapid Infiltration Basin (RIB) 5.56.115 The Permittee shall not
operate the rapid infiltration basins in months outside of those
indicated in
the Limits and Monitoring section of this permit. Where
favorable weather and operational conditions exist, the Permittee
may request permission from the MPCA to use the basins outside of
the dates in this permit. [Minn. R. 7001.0150, 3(F)]
5.56.116 If conditions require rapid infiltration basin use
outside of the effective period designated in the limits and
monitoring section of this permit or if an emergency condition
exists, the Permittee shall submit to the MPCA the "Spray
Irrigation/Rapid Infiltration Basin Discharge Not Authorized Within
Permit" form found on the MPCA's website at:
http://www.pca.state.mn.us/index.php/water/water-types-and-programs/wastewater/index.html.
The form shall be submitted to the MPCA at least two weeks prior to
needing to use the rapid infiltration basin. [Minn. R. 7001.0150,
3(F)]
5.56.117 The Permittee shall follow the approved operation and
maintenance manual for dosing and resting the rapid infiltration
basins in order to maximize effluent treatment. Use of the rapid
infiltration basins shall cycle in a dosing/resting operational
mode. [Minn. R. 7001.0150, 3(F)]
5.56.118 The entire basin cross-sectional area shall be
uniformly loaded. [Minn. R. 7001.0150, 3(F)] Pretreatment:
Undelegated Requirements 5.57.119 Pretreatment - Definitions.
[Minn. R. 7049] 5.57.120 An "Individual Control Mechanism" is a
document, such as an agreement or permit, that imposes
limitations or requirements on an individual industrial user of
the POTW. [Minn. R. 7049] 5.57.121 "Significant Industrial User"
(SIU) means any industrial user that:
a. discharges 25,000 gallons per day or more of process
wastewater; b. contributes a load of five (5) % or more of the
capacity of the POTW; or c. is designated as significant by the
Permittee or the MPCA on the basis that the SIU has a reasonable
potential to adversely impact the POTW, or the quality of its
effluent or residuals. [Minn. R. 7049]
5.57.122 Pretreatment - Permittee Responsibility to Control
Users. [Minn. R. 7049] 5.57.123 It is the Permittee's
responsibility to regulate the discharge from users of its
wastewater treatment
facility. The Permittee shall prevent any pass through of
pollutants or any inhibition or disruption of the Permittee's
facility, its treatment processes, or its sludge processes or
disposal that contribute to
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 27 of 70 Permit modified:
the violation of the conditions of this permit or any federal or
state law or regulation limiting the release of pollutants from the
POTW. [Minn. R. 7049]
5.57.124 The Permittee shall prohibit the discharge of the
following to its wastewater treatment facility: a. pollutants which
create a fire or explosion hazard, including any discharge with a
flash point less than 60 degrees C (140 degrees F); b. pollutants
which would cause corrosive structural damage to the POTW,
including any waste stream with a pH of less than 5.0; c. solid or
viscous pollutants which would obstruct flow; d. heat that would
inhibit biological activity, including any discharge that would
cause the temperature of the waste stream at the POTW treatment
plant headwork's to exceed 40 degrees C (104 degrees F); e.
pollutants which produce toxic gases, vapors, or fumes that may
endanger the health or safety of workers; or f. any pollutant,
including oxygen demanding pollutants such as biochemical oxygen
demand, released at a flow rate or pollutant concentration that
will cause interference or pass through. [Minn. R. 7049]
5.57.125 The Permittee shall prohibit new discharges of
non-contact cooling waters unless there is no cost effective
alternative. Existing discharges of non-contact cooling water to
the Permittee's wastewater treatment facility shall be eliminated,
where elimination is cost-effective, or where an
infiltration/inflow analysis and sewer system evaluation survey
indicates the need for such removal. [Minn. R. 7049]
5.57.126 If the Permittee accepts trucked-in wastes, the
Permittee shall evaluate the trucked in wastes prior to acceptance
in the same manner as it monitors sewered wastes. The Permittee
shall accept trucked-in wastes only at specifically designated
points. [Minn. R. 7049]
5.57.127 Pollutant of concern means a pollutant that is or may
be discharged by an industrial user that is, or reasonably should
be of concern on the basis that it may cause the permittee to
violate any permit limits on the release of pollutants. The
following pollutants shall be evaluated to determine if they should
be pollutants of concern: pollutants limited in this permit,
pollutants for which monitoring is required in this permit,
pollutants that are likely to cause inhibition of the Permittee's
POTW, pollutants which may interfere with sludge disposal, and
pollutants for which the Permittee's treatment facility has limited
capacity. [Minn. R. 7049]
5.57.128 Control of Significant Industrial Users. [Minn. R.
7049] 5.57.129 The Permittee shall impose pretreatment requirements
on SIUs which will ensure compliance with
all applicable effluent limitations and other requirements set
forth in this permit or any federal or state law or regulation
limiting the release of pollutants from the POTW. These
requirements shall be applied to SIUs by means of an individual
control mechanism. [Minn. R. 7049]
5.57.130 The Permittee shall not knowingly enter into an
individual control mechanism with any user that would allow the
user to contribute an amount or strength of wastewater that would
cause violation of any limitation or requirement in the permit, or
any applicable federal, state or local law or regulation. [Minn. R.
7049]
5.57.131 Monitoring of Significant Industrial Users. [Minn. R.
7049] 5.57.132 The Permittee shall obtain from SIUs specific
information on the quality and quantity of the SIU's
discharges to the Permittee's POTW. Except where specifically
requested by the Permittee and approved by the MPCA, this
information shall be obtained by means of representative monitoring
conducted by the Permittee or by the SIU under requirements imposed
by the Permittee in the SIU's individual control mechanism.
Monitoring performed to comply with this requirement shall include
all pollutants for which the SIU is significant and shall be done
at a frequency commensurate with the significance of the SIU.
[Minn. R. 7049]
5.57.133 Reporting and Notification. [Minn. R. 7049] 5.57.134
The Permittee shall submit a pretreatment annual report : Due by 31
days after the end of each
calendar year following permit issuance if a SIU discharges to
the POTW during a given calendar year. [Minn. R. 7049]
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Permit issued: February 06, 2014 MN0020192 Permit expires:
January 31, 2019 Page 28 of 70 Permit modified: 5.57.135 The
Pretreatment Annual Report shall be submitted on forms provided by
the agency or shall
provide equivalent information. The Permittee shall submit the
pre-treatment report to the following address: MPCA Attn: WQ
Submittals Center 520 Lafayette Road North St. Paul, Minnesota
55155-4194. [Minn. R. 7049]
5.57.136 The Permittee shall notify the MPCA in writing of any:
a. SIU of the Permittee's POTW which has not been previously
disclosed to the MPCA; b. anticipated or actual changes in the
volume or quality of discharge by an industrial user that could
result in the industrial user becoming an SIU as defined in this
chapter; or c. anticipated or actual changes in the volume or
quality of discharges by a SIU that would require changes to the
SIU's required local limits. This notification shall be submitted
within 30 days of identifying the IU as a SIU. Where changes are
proposed, they shall be submitted prior to changes being made.
[Minn. R. 7049]
5.57.137 Upon notifying the MPCA of a SIU or change in a SIU
discharge as required above, the Permittee shall submit the
following information on forms provided by the agency or in a
comparable format: a. the identity of the SIU and a description of
the SIU's operation and process; b. a characterization of the SIU's
discharge; c. the required local limits that will be imposed on the
SIU; d. a technical justification of the required local limits; and
e. a plan for monitoring the SIU which is consistent with
monitoring requirements in this chapter. [Minn. R. 7049]
5.57.138 In