26-Final Draft Exhibit R - Permits.pdf

EXHIBIT R

Permits

Existing permits associated with operation and maintenance of District Facilities (both air and water), as well as a water withdrawal permit are provided herein.

Proposers are advised that various permits are beyond expiration dates, however, permits remain active under shield provisions. A new WPDES permit is expected to be issued in 2026. Air permits will be re-issued if/when new construction permits are required.

Expected revisions to the 2026 WPDES permit revision are provided herein.

WPDES Permit No. WI-0036820-04-0

MILWAUKEE METRO SEW DIST COMBINED

TABLE OF CONTENTS

1 INFLUENT REQUIREMENTS 1

1.1 SAMPLING POINT(S) 1

1.2 INFLUENT MONITORING REQUIREMENTS 1

1.2.1 Sampling Point 701 - JONES ISLAND; and 702- SOUTH SHORE 1

2 COOLING WATER INTAKE STRUCTURE (CWIS) 3

2.1 SAMPLING POINT(S) 3

2.2 COOLING WATER MONITORING REQUIREMENTS AND BTA DETERMINATION 3

2.2.1 703 – Jones Island Cooling Water Intake 3

2.3 COOLING WATER INTAKE STRUCTURE STANDARD REQUIREMENTS 4

2.3.1 Future BTA for Cooling Water Intake Structure 4

2.3.2 Documentation to be Submitted 4

2.3.3 Entrainment Monitoring 5

2.3.4 Impingement Mortality Monitoring 5

2.3.5 Visual or Remote Inspections 5

2.3.6 Reporting Requirements for Cooling Water Intake 5

2.3.7 Intake Screen Discharges and Removed Substances 6

2.3.8 Endangered Species Act 6

3 IN-PLANT REQUIREMENTS 7

3.1 SAMPLING POINT(S) 7

3.2 MONITORING REQUIREMENTS 7

3.2.1 Sampling Points 101 - Mercury Field Blank – South Shore & 102- Mercury Field Blank – Jones Island 7

3.2.2 Sampling Point 103 - Combined Sewage Treatment at JONES ISLAND 7

3.2.3 Sampling Point 141 - South Shore BLENDING 8

3.2.4 Sampling Point 142 – City Water Intake 9

4 COMBINED SEWER SYSTEM REQUIREMENTS 10

4.1 DROPSHAFT SAMPLING POINT(S) 10

4.2 DROPSHAFT MONITORING REQUIREMENTS 10

4.2.1 Sampling Points 104 - NS4 - Cambridge & Providence; 105- NS5 - Burleigh & Milw. River; 106- NS6 - Park Place & Milw. River; 107- NS7 - Commerce & Booth; 108- NS8 - Commerce & Pleasant; 109- NS9 - Old World 3rd & Mckinley;

110- NS10 - Water & St. Paul; 111- NS11 - Humboldt & Capitol; 112- NS12 - 31st & Capitol; 113- CT2 - Hawley & State;

114- CT3/4 - 44th & Wells; 115- CT5/6 - 25th & Menomonee River; 116- CT7 - 16th & Canal; 117- CT8 - 3rd & Seeboth;

118- KK1 - 6th & Cleveland; 119- KK2 - 1st & Chase; 120- KK3 - 4th & Becher; 121- KK4 - 1st & Lincoln; 122- LMN - Bay & Ward, and 123- LMS - Lincoln Mem. & Russell 10

4.3 COMBINED SEWER OVERFLOW REQUIREMENTS 11

4.3.1 Inventory of Combined Sewer Overflow (CSO) Outfalls 11

CSO Outfalls to the Milwaukee River, Table 4.3.1(a) 11 CSO Outfalls to the Menomonee River, Table 4.3.1(c) 13 CSO Outfalls to the South Menomonee Canal – Branch of the Menomonee River, Table 4.3.1(d) 13 CSO Outfalls to Burnham Canal – Branch of Menomonee River, Table 4.3.1(e) 14 CSO Outfalls to Lake Michigan, Table 4.3.1(f) 14 CSO Outfalls to Lincoln Creek, Table 4.3.1(g) 14

4.3.2 Collection System Operational Requirements 14

4.3.3 Operational and Technology-Based Requirements 15

4.3.4 CSO Performance Standards for Water Quality-Based Requirements 15

4.3.5 CSO Discharge Reporting Requirements 18

5 SURFACE WATER REQUIREMENTS 19

5.1 SAMPLING POINT(S) 19

5.2 MONITORING REQUIREMENTS AND EFFLUENT LIMITATIONS 19

5.2.1 Sampling Point (Outfall) 001 - SOUTH SHORE EFFLUENT 19

5.2.2 Sampling Point (Outfall) 002 - JONES ISLAND EFFLUENT 23

5.2.3 Sampling Point (Outfall) 003 - JONES ISLAND NCCW 27

6 GROUNDWATER REQUIREMENTS 28

6.1 OPERATIONAL REQUIREMENTS 28

6.1.1 Water Level Requirements 28

6.1.2 Net Positive Head Requirements and Compliance Assessment Method 28

6.1.3 Procedures for Future Well Abandonment/Inactivation 29

6.2 GROUNDWATER LEVEL MONITORING REQUIREMENTS 29

6.2.1 Groundwater Monitoring System for Depth to GW & GW Elevation 29

6.3 GROUNDWATER QUALITY REQUIREMENTS AND LIMITATIONS 30

6.3.1 Groundwater Monitoring System for GW Quality - Northwest Side Relief Sewer 30

6.3.2 Groundwater Monitoring System for GW Quality - Inline Storage System (ISS) 31

6.3.3 Required Response Actions for NR 140 PAL and ES Exceedances 33

7 LAND APPLICATION REQUIREMENTS 34

7.1 SAMPLING POINT(S) 34

7.2 MONITORING REQUIREMENTS AND LIMITATIONS 34

7.2.1 Sampling Point (Outfall) 004 – South Shore (Agrilife) 34

7.2.2 Sampling Point (Outfall) 005 - South Shore Cake Sludge 38

7.2.3 Sampling Point (Outfall) 006 – Jones Island EQ Sludge - PRODUCTION 41

7.2.4 Sampling Point (Outfall) 008 – Jones Island EQ Sludge - SHIPPING 45

7.2.5 Sampling Point (Outfall) 009 – Jones Island EQ Sludge - BAGGING 46

7.2.6 Sampling Point (Outfall) 010 – Jones Island Filter Press Cake Sludge - LANDFILLED 46

8 SCHEDULES 51

8.1 SURFACE WATER INTAKE 51

8.2 SURFACE WATER QUALITY MONITORING PLAN 51

8.3 WET WEATHER MANAGEMENT 51

8.4 REGIONAL WATER QUALITY IMPROVEMENT PLAN (WQIP) 52

8.5 MERCURY POLLUTANT MINIMIZATION PROGRAM 52

8.6 PHOSPHORUS OPTIMIZATION - SOUTH SHORE WRF 53

8.7 CONTINUOUS TEMPERATURE MONITORING - OUTFALL 003 53

8.8 CONTINUOUS TEMPERATURE MONITORING - OUTFALL 001 AND 002 53

8.9 GROUNDWATER MONITORING WELL - ABANDONMENT 53

8.10 GROUNDWATER MONITORING PLAN - INLINE STORAGE SYSTEM (ISS) 54

8.11 BIOSOLIDS MANAGEMENT PLAN 54

8.12 BIOSOLIDS DAILY LOGS 54

9 STANDARD REQUIREMENTS 56

9.1 REPORTING AND MONITORING REQUIREMENTS 56

9.1.1 Monitoring Results 56

9.1.2 Sampling and Testing Procedures 56

9.1.3 Pretreatment Sampling Requirements 56

9.1.4 Recording of Results 56

9.1.5 Reporting of Monitoring Results 57

9.1.6 Compliance Maintenance Annual Reports 57

9.1.7 Records Retention 57

9.1.8 Other Information 58

9.1.9 Reporting Requirements – Alterations or Additions 58

9.2 SYSTEM OPERATING REQUIREMENTS 58

9.2.1 Noncompliance Reporting 58

9.2.2 Flow Meters 59

9.2.3 Raw Grit and Screenings 59

9.2.4 Sludge Management 59

9.2.5 Prohibited Wastes 59

9.2.6 Bypass 59

9.2.7 Scheduled Bypass 59

9.2.8 Controlled Diversions 60

9.2.9 Blending 60

9.2.10 Proper Operation and Maintenance 60

9.2.11 Operator Certification 61

9.3 SEWAGE COLLECTION SYSTEMS 61

9.3.1 Sanitary Sewage Overflows and Sewage Treatment Facility Overflows 61

9.3.2 Capacity, Management, Operation and Maintenance (CMOM) Program 62

9.3.3 Sewer Cleaning Debris and Materials 63

9.4 SURFACE WATER REQUIREMENTS 63

9.4.1 Permittee-Determined Limit of Quantitation Incorporated into this Permit 63

9.4.2 Appropriate Formulas for Effluent Calculations 63

9.4.3 Effluent Temperature Requirements 64

9.4.4 Visible Foam or Floating Solids 64

9.4.5 Surface Water Uses and Criteria 64

9.4.6 Percent Removal 64

9.4.7 Fecal Coliforms 64

9.4.8 Year-Round Disinfection 64

9.4.9 Total Residual Chlorine Requirements (When De-Chlorinating Effluent) 65

9.4.10 Whole Effluent Toxicity (WET) Monitoring Requirements 65

9.4.11 Whole Effluent Toxicity (WET) Identification and Reduction 65

9.4.12 Reopener Clause 66

9.5 PRETREATMENT PROGRAM REQUIREMENTS 66

9.5.1 Inventories 66

9.5.2 Regulation of Industrial Users 66

9.5.3 Annual Pretreatment Program Report 67

9.5.4 Pretreatment Program Modifications 68

9.5.5 Program Resources 68

9.6 GROUNDWATER STANDARD REQUIREMENTS 68

9.6.1 Application of NR 140 to Substances Discharged 68

9.6.2 Groundwater Sampling 68

9.6.3 Indicator Parameter - Preventive Action Limits 68

9.6.4 Groundwater Monitoring Forms 69

9.6.5 Appropriate Formulas for Groundwater 69

9.6.6 Reporting Depth to Groundwater 69

9.6.7 Groundwater Elevation 69

9.6.8 Groundwater Grab Samples 69

9.6.9 Filtering of Groundwater Samples 69

9.6.10 Groundwater Data Log 69

9.6.11 Notification of Attaining or Exceeding Groundwater Quality Standards 70

9.6.12 Preventive Action Limit (PAL) Exceedance 70

9.6.13 Enforcement Standard Exceedance Within the Design Management Zone 70

9.6.14 Enforcement Standard Exceedance Outside the Design Management Zone 70

9.7 LAND APPLICATION REQUIREMENTS 70

9.7.1 Sludge Management Program Standards And Requirements Based Upon Federally Promulgated Regulations 70

9.7.2 General Sludge Management Information 71

9.7.3 Sludge Samples 71

9.7.4 Land Application Characteristic Report 71

9.7.5 Calculation of Water Extractable Phosphorus 71

9.7.6 Monitoring and Calculating PCB Concentrations in Sludge 71

9.7.7 Annual Land Application Report 71

9.7.8 Other Methods of Disposal or Distribution Report 72

9.7.9 Approval to Land Apply 72

9.7.10 Soil Analysis Requirements 72

9.7.11 Land Application Site Evaluation 72

9.7.12 Class A Sludge: Fecal Coliform Density Requirement 72

9.7.13 Class A Sludge: Heat Drying Process 72

9.7.14 Class A Sludge: Temperature/Time Process 72

9.7.15 Class B Sludge: Fecal Coliform Limitation 73

9.7.16 Class B Sludge: Anaerobic Digestion 73

9.7.17 Vector Control: Volatile Solids Reduction 73

9.7.18 Vector Control: Drying With Primary Solids 74

9.7.19 Class B Sludge – Vector Control: Injection 74

9.7.20 Class B Sludge – Vector Control: Incorporation 74

9.7.21 Landfilling of Sludge 74

9.7.22 Sludge Landfilling Reports 74

10 SUMMARY OF REPORTS DUE 75

1 Influent Requirements

1.1 Sampling Point(s)

Sampling Point Designation

Sampling Point Number

Sampling Point Location, Waste Type/Sample Contents and Treatment Description (as applicable)

701 Jones Island INFLUENT: 24-hr flow proportional composite samples shall be collected prior to coarse screening from the high and low siphons and Inline Storage System (ISS).

702 South Shore INFLUENT: 24-hr flow proportional composite samples shall be collected after preliminary treatment (screening and grit removal) and prior to primary treatment.

1.2 Influent Monitoring Requirements

The permittee shall comply with the following monitoring requirements.

1.2.1 Sampling Point 701 - JONES ISLAND; and 702- SOUTH SHORE Monitoring Requirements and Limitations

Parameter Limit Type Limit and Units

Sample Frequency

Sample Type

Notes

Flow Rate MGD Daily Continuous BOD5, Total mg/L Daily 24-Hr Flow

Prop Comp

Suspended Solids, Total mg/L Daily 24-Hr Flow

Cadmium, Total Recoverable µg/L Monthly 24-Hr Flow

Chromium, Total

Copper, Total

Lead, Total

Nickel, Total

Zinc, Total

Mercury, Total ng/L Monthly 24-Hr Comp See section 1.2.1.3 below.

1.2.1.1 Total Metals Analyses

Measurements of total metals and total recoverable metals shall be considered as equivalent.

1.2.1.2 Sample Analysis

Samples shall be analyzed using a method which provides adequate sensitivity so that results can be quantified at a level of quantitation below the calculated/potential effluent limit, unless not possible using the most sensitive approved method.

1.2.1.3 Mercury Monitoring

The permittee shall collect and analyze all mercury samples according to the data quality requirements of ss. NR 106.145(9) and (10), Wisconsin Administrative Code. The limit of quantitation (LOQ) used for the effluent and field blank shall be less than 1.3 ng/L, unless the samples are quantified at levels above 1.3 ng/L. The permittee shall collect at least one mercury field blank for each set of mercury samples (a set of samples may include combinations of intake, influent, effluent or other samples all collected on the same day). The permittee shall report results of samples and field blanks to the Department on Discharge Monitoring Reports.

2 Cooling Water Intake Structure (CWIS)

2.1 Sampling Point(s)

Sampling Point Designation

Sampling Point Number

Sampling Point Location, Waste Type/Sample Contents and Treatment Description (as applicable)

703 Jones Island COOLING WATER INTAKE: Intake flow shall be monitored on days of operation of the Milwaukee Inner Harbor/Kinnickinnic River cooling water intake structure.

2.2 Cooling Water Monitoring Requirements and BTA Determination The intake(s) has been reviewed for compliance with BTA (Best Technology Available) standards and the BTA determination(s) is listed below.

2.2.1 703 – Jones Island Cooling Water Intake Monitoring Requirements and Limitations

Parameter Limit Type Limit and Units

Sample Frequency

Sample Type

Notes

Flow Rate MGD Daily Continuous Report maximum flow Intake Water Used Exclusively For Cooling

Percent Daily Continuous

2.2.1.1 CWIS - Authority to Operate and Description

The permittee shall at all times properly operate and maintain all water intake facilities. The permittee shall give advance notice to the Department of any planned changes in the location, design, operation, or capacity of the intake structure. The permittee is authorized to use the Jones Island cooling water intake system which consists of the following:

• Location: Milwaukee Inner Harbor, on the east bank of the Kinnickinnic River, 120 feet from the confluence with the Milwaukee River.

• General Description: Installed channel with a 4 ft. x 4 ft. opening in sheet pile wall.

• Major Components: Sixteen bars covering a total surface area of 4.67 square feet, leaving 11.33 square feet open at the channel. Two parallel 10 ft wide traveling screens.

• Maximum Design Intake Flow (DIF): 8.6 MGD (2 pumps at 4.3 MGD each)

• Maximum Design Intake Velocity: 1.2 ft/sec at the point where the water is withdrawn from the harbor (bar rack at a submerged intake).

• Average Actual Intake Velocity: 0.17 ft/sec at the point where the water is withdrawn from the harbor (bar rack at a submerged intake).

• Maximum Through-Screen Design Intake Velocity: 0.19 ft/sec (with 2 pumps operating at 4.3 MGD each through traveling screens)

2.2.1.2 Cooling Water Intake BTA (Best Technology Available) Determination The Department believes that the Jones Island cooling water intake, as described above in subsection 2.2.1.1, represents BTA for impingement mortality and interim BTA for entrainment reduction and hence for minimizing adverse environmental impact in accordance with the requirements in section s. 283.31(6), Wis. Stats. and section 316(b) of the Clean Water Act.

Note: This BTA determination was based on the Department’s November 11, 2016 Draft Guidance for Implementation of Section 316(b) of the Clean Water Act: Regulating Cooling Water Intake Structures. In the case that major changes are made to the Guidance, and/or a new code is promulgated that significantly effects the requirements in this section, the Department shall modify this section accordingly.

2.3 Cooling Water Intake Structure Standard Requirements

The following requirements and provisions apply to all water intake structures identified as sampling points in section 2.1.

2.3.1 Future BTA for Cooling Water Intake Structure

BTA determinations for entrainment and impingement mortality at cooling water intake structures will be made in each permit reissuance, in accordance with 40 CFR §125.90-98. In subsequent permit reissuance applications, the permittee shall provide all the information required in 40 CFR §122.21(r).

Exemptions from some permit application requirements are possible in accordance with 40 CFR §125.95(c) and §125.98(g), where information already submitted is sufficient. If an exemption is desired, a request for reduced application material requirements must be submitted at least 2 years and 6 months prior to permit expiration. Past submittals and previously conducted studies may satisfy some or all of the application material requirements.

Note: The Department is in the process of promulgating ch. NR 111, Wis. Adm. Code, on cooling water intake structures. The objective of ch. NR 111 is to incorporate federal requirements for cooling water intake structures into the state’s administrative code. If ch. NR 111 is promulgated prior to the expiration of this permit, the permittee may be subject to ch. NR 111 application requirements for the next permit reissuance.

2.3.2 Documentation to be Submitted

Because the Department granted the permittee an alternate schedule for submittal of the remaining application materials pursuant to 40 CFR 125.95(a)(2), the following documentation shall be submitted with the next permit application for reissuance, no later than September 30, 2023, as required in 40 CFR §122.21(r):

• Applicable provisions described in §122.21(r)(5).

• Facility’s water balance, according to §122.21(r)(3).

• A report on the actual intake velocity and evaluation that it will not exceed 0.5 fps under all conditions, including during minimum ambient source water surface elevations and during periods of maximum head loss across the intake bars, according to §122.21(r)(6).

• Hydrological and geomorphological data of the water body, temperature regimes and zone of influence, according to §122.21(r)(2).

• Source water baseline biological characterization data. A summary of the studies previously submitted is acceptable, as long as it clearly shows their applicability to MMSD’s intake hydraulic zone of influence and it focus on the applicable requirements in §122.21(r)(4).

• Operational Status, according to §122.21(r)(8).

• Entrainment Performance Studies, according to §122.21(r)(7).

This study shall demonstrate the difference between aquatic life concentrations in the body of water, outside of the zone of influence, and the aquatic life concentrations in the forebay, upstream of the traveling screens.

• Entrainment Characterization Study, if after delineation of hydraulic zone of influence, it is determined that the previously submitted Study performed by Wisconsin Electric Valley Power Plant is not applicable to the permittee, according to §122.21(r)(9).

• Alternatives analysis report for compliance with the entrainment BTA. This alternatives analysis for entrainment BTA shall examine the options for compliance with the entrainment BTA requirement and propose a candidate entrainment BTA to the Department for consideration during its next BTA determination.

The analysis must, at least narratively, address and consider the factors listed in §125.98 (f) (2) and may consider the factors listed in § 125.98 (f) (3). The analysis must evaluate, at a minimum, closed-cycle recirculating systems, fine mesh screens with a mesh size of 2mm or smaller, variable speed pumps, water reuse or alternate sources of cooling water, and any additional technology identified by the department at a later date.

• All other applicable documentation described on 40 CFR §122.21(r) previously submitted with the application for the current permit and not requested for exemption according to 40 CFR §125.95(c) and §125.98(g).

Notes: The Entrainment Performance Study and the Entrainment Characterization Study may be combined and submitted as one. Pursuant to §125.95(c), the permittee may request the above documentation to be considered as part of the next permit application.

2.3.3 Entrainment Monitoring

At this time, no additional entrainment monitoring is required beyond what is specified by 40 CFR 122.

2.3.4 Impingement Mortality Monitoring

Monitor intake flow velocity at the bar screens at least once per day to ensure that velocity does not exceed 0.5 fps and shall be monitored at the time of day that it is most likely to be the highest. The permittee may either calculate or directly measure this velocity.

2.3.5 Visual or Remote Inspections

The permittee shall conduct a weekly visual inspection or employ a remote monitoring device during periods when the cooling water intake is in operation. The inspection frequency shall be weekly to ensure the intakes are maintained and operated to function as designed.

2.3.6 Reporting Requirements for Cooling Water Intake

The permittee shall adhere to the reporting requirements listed below:

2.3.6.1 Annual Certification Statement and Report

Submit an annual certification statement signed by the authorized representative with information on the following, no later than January 31st for the previous year:

• Certification that water intake structure technologies are being maintained and operated as set forth in this permit, or a justification to allow a modification of the practices. Include a summary of the required maintenance activities.

• If there are substantial modifications to the operation of any unit that impacts the cooling water withdrawals or operation of the water intake structure, provide a summary of those changes.

• If the information contained in the previous year’s annual certification is still applicable, the certification may state as such.

2.3.7 Intake Screen Discharges and Removed Substances

Floating debris and accumulated trash collected on the cooling water intake trash rack shall be removed and disposed of in a manner to prevent any pollutant from the material from entering the waters of the State pursuant to s. NR

205.07 (3) (a), Wis. Adm. Code, except that backwashes may contain fine materials that originated from the intake water source such as sand, silt, small vegetation or aquatic life.

2.3.8 Endangered Species Act

Nothing in this permit authorizes take for the purpose of a facility’s compliance with the Endangered Species Act.

Refer to 40 CFR §125.98 (b) (1) and (2).

3 In-Plant Requirements

3.1 Sampling Point(s)

Sampling Point Designation

Sampling Point Number

Sampling Point Location, WasteType/Sample Contents and Treatment Description (as applicable)

101 South Shore FIELD BLANK: Collect mercury field blank using standard sample handling procedures.

102 Jones Island FIELD BLANK: Collect mercury field blank using standard sample handling procedures.

103 Jones Island CSO TREATMENT: 24-hr composite samples for BOD and total suspended solids shall be collected at the discharge point from the inline storage system.

141 South Shore BLENDING: Sample point for reporting diverted flow from the primary clarifiers during high flow events. Flow bypasses the aeration basins and final clarifiers but receives disinfection prior to discharge.

142 CITY WATER INTAKE: A grab sample of raw Lake Michigan water shall be collected from the Linnwood water supply facility, prior to receiving treatment.

3.2 Monitoring Requirements

The permittee shall comply with the following monitoring requirements and limitations.

3.2.1 Sampling Points 101 - Mercury Field Blank – South Shore & 102- Mercury Field Blank – Jones Island

Monitoring Requirements and Limitations Parameter Limit Type Limit and

Units Sample Frequency

Sample Type

Notes

Mercury, Total Recoverable ng/L Monthly Blank See section 3.2.1.1 below.

3.2.1.1 Mercury Monitoring

The permittee shall collect and analyze all mercury samples according to the data quality requirements of ss. NR 106.145(9) and (10), Wisconsin Administrative Code. The limit of quantitation (LOQ) used for the effluent and field blank shall be less than 1.3 ng/L, unless the samples are quantified at levels above 1.3 ng/L. The permittee shall collect at least one mercury field blank for each set of mercury samples (a set of samples may include combinations of intake, influent, effluent or other samples all collected on the same day). The permittee shall report results of samples and field blanks to the Department on Discharge Monitoring Reports.

3.2.2 Sampling Point 103 - Combined Sewage Treatment at JONES ISLAND Monitoring Requirements and Limitations

Parameter Limit Type Limit and Units

Sample Frequency

Sample Type

Notes

Flow Rate MGD Daily Continuous Start flow measurement at the commencement of operations. Measure flow in daily increments until operation ends and report daily flow on the eDMR.

See section 3.2.2.1.

Time hours Daily Calculated Report the total duration in which the combined sewer treatment process is in operation within a given day (12:00am - 11:59pm).

See section 3.2.2.1.

BOD5, Total mg/L Daily 24-Hr Comp Start sampling at the commencement of operation. Sample in daily increments until the operation ends and report daily results on the eDMR.

See section 3.2.2.1.

Suspended Solids, Total mg/L Daily 24-Hr Comp Start sampling at the commencement of operation. Sample in daily increments until the operation ends and report daily results on the eDMR.

See section 3.2.2.1.

3.2.2.1 Combined Wet Weather Flow Treatment Requirements

The permittee shall utilize Jones Island Water Reclamation Facility (WRF) capacity to the maximum extent practicable during and after storms to provide primary and secondary treatment and disinfection for wastewater collected and stored in the Inline Storage System (ISS). When peak flows exceed Jones Island secondary treatment capacity, flows from the ISS shall receive treatment equivalent to primary treatment and disinfection prior to being discharged. Such discharges are subject to the following provisions;

1. Wet weather discharges that consist of wastewater that has received primary and secondary treatment combined with combined sewer flows from the ISS, must meet the effluent limits for bacteria (fecal coliforms), BOD5, and total suspended solids applicable to discharges from Outfall 002.

2. The combined sewer treatment process shall be operated during wet weather only when peak flows are in excess of secondary treatment capacity at Jones Island and only after flow to the South Shore WRF is maximized to the extent practicable.

3. The permittee shall ensure that the District’s collection system is designed, operated, and maintained to maximize system storage and conveyance capacity according to accepted best engineering practices.

3.2.3 Sampling Point 141 - South Shore BLENDING

Monitoring Requirements and Limitations

Parameter Limit Type Limit and Units

Sample Frequency

Sample Type

Notes

Flow Rate MGD Daily Continuous Start flow measurement at the commencement of blending operations.

Measure flow in daily increments until operation ends and report daily flow on the eDMR. See section 3.2.3.1.

Time hours Daily Calculated Report the total duration of blending within any given day (12:00am - 11:59pm) in which blending occurs. See section 3.2.3.1.

3.2.3.1 Blending Flow

The permittee shall report the volume of wastewater that is diverted around secondary treatment processes whenever in-plant diversion (blending) occurs. See “Blending” requirements in the Standard Requirements section for additional requirements.

3.2.4 Sampling Point 142 – City Water Intake

Monitoring Requirements and Limitations

Parameter Limit Type Limit and Units

Sample Frequency

Sample Type

Notes

Arsenic, Total Recoverable µg/L Quarterly Grab See section 3.2.4.1

Mercury, Total Recoverable µg/L Quarterly Grab See section 3.2.4.2

3.2.4.1 Sample Analysis - Arsenic

Samples for arsenic shall be analyzed using a method which provides adequate sensitivity so that results can be quantified at a level of quantitation below the calculated/potential effluent limit of 0.2 ug/L, unless not possible using the most sensitive approved method.

3.2.4.2 Mercury Monitoring

The permittee shall collect and analyze all mercury samples according to the data quality requirements of ss. NR 106.145(9) and (10), Wisconsin Administrative Code. The limit of quantitation (LOQ) used for the effluent and field blank shall be less than 1.3 ng/L, unless the samples are quantified at levels above 1.3 ng/L. The permittee shall collect at least one mercury field blank for each set of mercury samples (a set of samples may include combinations of intake, influent, effluent or other samples all collected on the same day). The permittee shall report results of samples and field blanks to the Department on Discharge Monitoring Reports.

4 Combined Sewer System Requirements

4.1 Dropshaft Sampling Point(s)

Sampling Point Designation

Sampling Point Number

Sampling Point Location

104 NS4 - ISS Dropshaft located at North Cambridge Avenue & East Providence Avenue 105 NS5 - ISS Dropshaft located at East Burleigh Street at the Milwaukee River 106 NS6 - ISS Dropshaft located at East Park Place at the Milwaukee River 107 NS7 - ISS Dropshaft located at North Commerce Street & North Booth Street 108 NS8 - ISS Dropshaft located at North Commerce Street & East Pleasant Street 109 NS9 - ISS Dropshaft located at North Old World 3rd Street & West McKinley Avenue 110 NS10 - ISS Dropshaft located at North Water Street & East St. Paul Avenue 111 NS11 - ISS Dropshaft located at North Humboldt Avenue & East Capitol Drive 112 NS12 - ISS Dropshaft located at North 31st Street & West Capitol Drive 113 CT2 - ISS Dropshaft located at North Hawley Road & West State Street 114 CT3/4 - ISS Dropshaft located at North 44th Street & West Wells Street 115 CT5/6 - ISS Dropshaft located at North 25th Street at the Menomonee River 116 CT7 - ISS Dropshaft located at South 16th Street & West Canal Street 117 CT8 - ISS Dropshaft located at South 3rd Street & West Seeboth Street 118 KK1 - ISS Dropshaft located at South 6th Street & West Cleveland Avenue 119 KK2 - ISS Dropshaft located at South 1st Street & South Chase Avenue 120 KK3 - ISS Dropshaft located at South 4th Street & West Becher Street 121 KK4 - ISS Dropshaft located at South 1st Street & West Lincoln Avenue 122 LMN - ISS Dropshaft located at East Bay Street & East Ward Street 123 LMS - ISS Dropshaft located at South Lincoln Memorial Drive & East Russell Avenue

4.2 Dropshaft Monitoring Requirements

A grab sample shall be taken during each overflow event at ISS dropshaft(s) identified in table 4.1. The permittee shall provide for the collection of grab samples for the pollutants listed in Section 4.2.1 below. The samples shall be collected at the dropshaft junction chamber. Samples shall be taken when the gate closes at the junction chamber to which the outfall diversion chamber is tributary.

4.2.1 Sampling Points 104 - NS4 - Cambridge & Providence; 105- NS5 - Burleigh & Milw. River; 106- NS6 - Park Place & Milw. River; 107- NS7 - Commerce & Booth;

108- NS8 - Commerce & Pleasant; 109- NS9 - Old World 3rd & Mckinley; 110- NS10 - Water & St. Paul; 111- NS11 - Humboldt & Capitol; 112- NS12 - 31st & Capitol; 113- CT2 - Hawley & State; 114- CT3/4 - 44th & Wells; 115- CT5/6 - 25th & Menomonee River; 116- CT7 - 16th & Canal; 117- CT8 - 3rd & Seeboth; 118- KK1 - 6th & Cleveland; 119- KK2 - 1st & Chase; 120- KK3 - 4th & Becher; 121- KK4 - 1st & Lincoln; 122- LMN - Bay & Ward, and 123- LMS - Lincoln Mem. & Russell

Monitoring Requirements and Limitations Parameter Limit Type Limit and

Units Sample Frequency

Sample Type

Notes

Volume MG Per Calculated

Occurrence Fecal Coliform #/100 ml Per

Occurrence Grab

E. coli #/100 ml Per Occurrence

Grab

BOD5, Total mg/L Per Occurrence

Grab

Suspended Solids, Total mg/L Per Occurrence

Grab

Phosphorus, Total mg/L Per Occurrence

Grab

Nitrogen, Ammonia (NH3-N) Total mg/L Per Occurrence

Grab

4.3 Combined Sewer Overflow Requirements

Discharges from the combined sewer overflows listed below shall be limited and monitored by the permittee in accordance with the following permit conditions, s. NR 210.205, Wis. Adm. Code, and the U.S. EPA CSO Control Policy.

4.3.1 Inventory of Combined Sewer Overflow (CSO) Outfalls

CSO Outfalls to the Milwaukee River, Table 4.3.1(a)

Serial Number Location

Associated Dropshaft

Sample Point Number

Latitude Longitude

015-CSO N. Marshall St. extended (MIS) 43.05616921 -87.90114712 016-CSO W. Vliet Street extended, east of N. 3rd Street (MIS) 43.04781774 -87.91305281 017-CSO N. Van Buren Street at E. Brady Street 108 (NS8) 43.05307103 -87.9056693 018-CSO S. Water Street at E. Bruce Street (MIS) 43.02534141 -87.9037657 051-CSO N. Weil Street 107 (NS7) 43.05718576 -87.89917475 089-CSO E. Capitol Drive 111 (NS11) 43.08931504 -87.89910241 090-CSO E. Keefe Avenue 104 (NS4) 43.08198484 -87.8925048 091-CSO E. Edgewood Avenue 104 (NS4) 43.08191551 -87.89149919 092-CSO E. Auer Avenue 105 (NS5) 43.0765233 -87.89318275 094-CSO E. Burleigh Street 105 (NS5) 43.07466633 -87.89295328 096-CSO E. Locust Street 105 (NS5) 43.07110111 -87.89394217 097A-CSO E. Park Place 106 (NS6) 43.06735984 -87.89443503 098-CSO E. Bradford Avenue 106 (NS6) 43.06374604 -87.89234066 099-CSO E. Boylston Street 107 (NS7) 43.05739807 -87.89419929 101-CSO N. Pulaski Street 107 (NS7) 43.05676834 -87.89750388 102-CSO N. Humboldt Avenue 107 (NS7) 43.05736134 -87.89772699 103-CSO N. Marshall Street 107 (NS7) 43.05614443 -87.90119659 103A-CSO 1944 N. Commerce Street 107 (NS7) 43.05677638 -87.90121094 104-CSO N. Holton Street 107 (NS7) 43.05455721 -87.9046317 106-CSO North of E. Pleasant Street 108 (NS8) 43.05222066 -87.90743926 107-CSO E. Walnut Street 108 (NS8) 43.05167025 -87.90786652 108B-CSO E. Pleasant Street at N. Water Street 108 (NS8) 43.05153962 -87.90724589

109-CSO North of W. Cherry Street 108 (NS8) 43.05018321 -87.90949543 110-CSO W. Cherry Street 108 (NS8) 43.04908316 -87.91215712 111-CSO E. Lyon Street 108 (NS8) 43.04965569 -87.90883642 112-CSO E. Ogden Avenue 109 (NS9) 43.04836617 -87.91127593 113-CSO W. McKinley Avenue (North bank) 109 (NS9) 43.04696199 -87.91354058 113A-CSO W. McKinley Avenue (South bank) 109 (NS9) 43.04641292 -87.91357219 114-CSO W. Juneau Avenue 109 (NS9) 43.04550462 -87.91358274 115-CSO W. Highland Avenue 109 (NS9) 43.04426589 -87.91360919 116-CSO E. Highland Avenue 109 (NS9) 43.04423764 -87.91282683 117-CSO W. State Street 109 (NS9) 43.0428927 -87.91363504 118-CSO E. State Street 109 (NS9) 43.04290333 -87.9125908 119-CSO W. Kilbourn Avenue 109 (NS9) 43.04162722 -87.91281475 120-CSO E. Kilbourn Avenue 109 (NS9) 43.04177365 -87.91199217 121-CSO North of W. Wells Street 109 (NS9) 43.04127342 -87.91258386 122-CSO W. Wells Street 109 (NS9) 43.04037265 -87.91172621 123-CSO E. Wells Street 109 (NS9) 43.04061023 -87.91122225 124-CSO North of W. Wisconsin Avenue 109 (NS9) 43.03988702 -87.91133247 125-CSO W. Wisconsin Avenue 109 (NS9) 43.03874776 -87.91035523 126-CSO E. Wisconsin Avenue 110 (NS10) 43.03852466 -87.9096428 127-CSO W. Michigan Street 110 (NS10) 43.03737326 -87.91012398 128-CSO E. Michigan Street 110 (NS10) 43.03735485 -87.90948366 129-CSO North of W. Clybourn Street 110 (NS10) 43.03670486 -87.91010542 130-CSO W. Clybourn Street 110 (NS10) 43.03605986 -87.91016499 131-CSO E. Clybourn Street 110 (NS10) 43.03615198 -87.90938052 133-CSO W. St. Paul Avenue 110 (NS10) 43.03462194 -87.91046051 134-CSO E. St. Paul Avenue 110 (NS10) 43.03501885 -87.90948054 135-CSO E. Buffalo Street 110 (NS10) 43.03379587 -87.90968974 136-CSO E. Chicago Street 110 (NS10) 43.03255661 -87.90995706 137-CSO S. 1st Place 117 (CT8) 43.03088906 -87.91099883 139-CSO E. Pittsburgh Avenue 117 (CT8) 43.02977667 -87.90765227 140-CSO N. Broadway 110 (NS10) 43.03038228 -87.90715897 141-CSO E. Florida Street 117 (CT8) 43.02773349 -87.90537041 142-CSO E. Polk Street 110 (NS10) 43.02850013 -87.90441227 143-CSO E. Bruce Street 117 (CT8) 43.02521578 -87.90376238 144-CSO E. Lyon Street 108 (NS8) 43.04969451 -87.90878533 146-CSO N. Arlington Place 107 (NS7) 43.05696186 -87.89541659 147-CSO E. Juneau Avenue 109 (NS9) 43.04579582 -87.91288057 230-CSO N. Richards at E. Congress (MIS) 43.0965371 -87.90701564

CSO Outfalls to the Kinnickinnic River, Table 4.3.1(b)

Serial Number Location

Associated Dropshaft

Sample Point Number

Latitude Longitude

019-CSO S. 1st Street (MIS) 43.00805495 -87.91090825 148-CSO E. National Avenue 117 (CT8) 43.02294636 -87.90558918 149-CSO South of E. Walker Street 117 (CT8) 43.02139692 -87.90596281 151-CSO E. Greenfield Avenue 117 (CT8) 43.01704151 -87.90281715

152-CSO S. Kinnickinnic Avenue (North bank) 120 (KK3) 43.00864265 -87.90825291 153-CSO S. Kinnickinnic Avenue (South bank) 120 (KK3) 43.0081248 -87.90805273 154-CSO S. 1st Street (North bank) 120 (KK3) 43.00855918 -87.91108589 155-CSO S. 1st Street (South bank) 120 (KK3) 43.00805752 -87.91126738 156-CSO S. 2nd Street at Kinnickinnic River 120 (KK3) 43.00844343 -87.91249216 157-CSO W. Rogers Street 120 (KK3) 43.00823586 -87.91418435 158-CSO W. Becher Street (North outfall) 120 (KK3) 43.0067321 -87.91423161 159-CSO W. Becher Street (South outfall) 120 (KK3) 43.00662362 -87.91409056 160-CSO E. Lincoln Avenue (South outfall) 121 (KK4) 43.00259896 -87.91149873 161-CSO W. Lincoln Avenue (West bank) 121 (KK4) 43.00284437 -87.91218591 162-CSO W. Lincoln Avenue (East bank) 121 (KK4) 43.00285696 -87.91176181 163-CSO S. Chase Avenue (North bank) 119 (KK2) 42.99729569 -87.9122121 164-CSO S. Chase Avenue (South bank) 119 (KK2) 42.99703942 -87.91221481 165-CSO S. 6th St. at W. Cleveland Avenue (Middle outfall) 118 (KK1) 42.99552843 -87.91841002 166-CSO S. 6th St. at W. Cleveland Avenue (North outfall) 118 (KK1) 42.99555107 -87.9184095 166A-CSO S. 6th Street at W. Cleveland Avenue (South outfall)

118 (KK1) 42.99549102 -87.91838558

167-CSO S. 8th Street 118 (KK1) 42.99694677 -87.92118421 168-CSO S. 14th Street 118 (KK1) 42.99714641 -87.92982199 169-CSO S. 27th Street 118 (KK1) 42.9916821 -87.9479935 260-CSO S. 6th Street at W. Oklahoma Avenue (MIS) 42.995012 -87.917594

CSO Outfalls to the Menomonee River, Table 4.3.1(c)

Serial Number Location

Associated Dropshaft

Sample Point Number

Latitude Longitude

010-CSO W. Canal Street at 8th Street (MIS) 43.03190123 -87.9217891 170-CSO S. 2nd Street 117 (CT8) 43.03227299 -87.91234781 172-CSO N. Emmber Lane (East outfall) 116 (CT7) 43.03254812 -87.92885813 173-CSO N. 15th Street (East outfall) 116 (CT7) 43.03292888 -87.93152262 174-CSO N. 15th Street (West outfall) 116 (CT7) 43.03293213 -87.93161675 175-CSO N. 17th Street 116 (CT7) 43.03293589 -87.93413786 176-CSO N. 25th Street 115 (CT5/6) 43.03271016 -87.94497878 177-CSO N. 26th Street 115 (CT5/6) 43.03252369 -87.94572932 177A-CSO 123 N. 25th Street 115 (CT5/6) 43.03218696 -87.94557481 178-CSO S. 27th Street (West outfall) 115 (CT5/6) 43.02791588 -87.94793115 180-CSO S. 35th Street 115 (CT5/6) 43.02506325 -87.95762023 181-CSO W. Wisconsin Avenue 114 (CT3/4) 43.03891949 -87.9652677 182-CSO N. 43rd Street 114 (CT3/4) 43.04116163 -87.9675224 182A-CSO 4251 W. State Street 114 (CT3/4) 43.04131434 -87.9675798 183-CSO N. 46th Street 114 (CT3/4) 43.04158668 -87.97303317 184-CSO N. Hawley Road 113 (CT2) 43.04259981 -87.98285729 185-CSO N. 9th Street extended 116 (CT7) 43.03228947 -87.92287012 262-CSO N. 59th Street and W. State Street (MIS) 43.04229372 -87.98660936

CSO Outfalls to the South Menomonee Canal – Branch of the Menomonee River, Table 4.3.1(d)

Serial Number Location

Associated Dropshaft

Sample Point Number

Latitude Longitude

061-CSO Emergency Wastewater Exit Facility 117 (CT8) 43.0312785 -87.91497691 187-CSO S. 4th Street 117 (CT8) 43.02986214 -87.91499358 188-CSO S. 6th Street at Menomonee River 117 (CT8) 43.02922308 -87.9183335

CSO Outfalls to Burnham Canal – Branch of Menomonee River, Table 4.3.1(e)

Serial Number Location

Associated Dropshaft

Sample Point Number

Latitude Longitude

189-CSO S. 9th Street (East outfall) 116 (CT7) 43.02620804 -87.92242925 190-CSO S. 9th Street (West outfall) 116 (CT7) 43.02618821 -87.92248408 191-CSO S. 11th Street 116 (CT7) 43.02619891 -87.9252297 193-CSO S. 13th Street 116 (CT7) 43.02622808 -87.92787892 194-CSO S. Muskego Avenue 116 (CT7) 43.02647509 -87.93094226

CSO Outfalls to Lake Michigan, Table 4.3.1(f)

Serial Number Location

Associated Dropshaft

Sample Point Number

Latitude Longitude

195-CSO E. Bay Street 122 (LMN) 43.00824562 -87.89198356 196-CSO E. Russell Avenue 123 (LMS) 43.00052439 -87.88744581

CSO Outfalls to Lincoln Creek, Table 4.3.1(g)

Serial Number Location

Associated Dropshaft

Sample Point Number

Latitude Longitude

145-CSO N. 35th Street and W. Congress Street 112 (NS12) 43.09680508 -87.95633756 197-CSO W. Hampton Avenue at N. 32nd Street (MIS) 43.10508536 -87.95225414

4.3.2 Collection System Operational Requirements

The permittee shall follow each of the following operational requirements:

1. No discharge shall occur during dry weather periods.

2. No discharge shall occur during wet weather periods except when the gate at the dropshaft downstream must be closed to prevent the ISS separated sewer or combined sewer capacity from being exceeded in accordance with the current standard operating procedures for ISS operation, or the capacity of the associated near-surface collector is exceeded.

3. The permittee shall continue to implement techniques to identify overflows during dry weather, such as remote monitoring or periodic inspections.

4. In the event there is a CSO discharge, the reporting requirements in sections 4.3.5 and 9.3.1.1 shall be followed. Area water utilities shall also be notified of the commencement of a CSO. Upon request, the permittee shall provide the Department any other pertinent information developed regarding the CSO incidents.

4.3.3 Operational and Technology-Based Requirements

The permittee shall comply with the following operational and technology-based requirements:

1. The permittee shall continue to implement proper operation and maintenance programs for the sewer system and all CSO outfalls to reduce the magnitude, frequency, and duration of CSOs. The program shall include regular sewer inspections, sewer and intercepting structure cleaning, equipment and sewer collection system repair or replacement where necessary, and disconnection of illegal connections.

2. The permittee shall continue to implement procedures that will maximize use of the collection system for wastewater storage in order to reduce the magnitude, frequency, and duration of CSOs.

3. The permittee shall review and modify, as appropriate, its existing pretreatment program to minimize CSO impacts from the discharges of industrial users.

4. The permittee shall continue to operate the water reclamation facility (WRF) at maximum treatable flow during all wet weather flow conditions to reduce the magnitude, frequency, and duration of CSOs. The permittee shall deliver all flows to the WRF within the constraints of the treatment capacity of the WRF.

5. Dry weather overflow from CSO outfalls are prohibited. Each dry weather overflow must be reported to the permitting authority as soon as the permittee becomes aware of the overflow. When the permittee detects a dry weather overflow, the permittee shall begin corrective action immediately. The permittee shall inspect the dry weather overflow each subsequent day until the overflow has been eliminated.

6. The permittee shall continue to implement measures to control solid and floatable materials in CSOs including operating a skimmer boat as part of a program to control solids and floatables in the river systems located below the CSO outfalls listed in section 4.3.1.

7. The permittee shall continue to implement a pollution prevention program focused on reducing the impact of CSOs on receiving waters.

8. Public Notification: The permittee shall continue to implement a public notification process to inform citizens of when and where CSOs occur. The process must include (a) a mechanism to alert persons of the occurrence of CSOs and (b) a system to determine the nature and duration of conditions that are potentially harmful for users of receiving waters due to CSOs. The permittee shall follow the public notification requirements as specified in 40 CFR 122.38. Starting February 7, 2019 and by May 1 of each calendar year the permittee shall make available to the public an annual notice describing the CSO discharges from the discharge point(s) that occurred in the previous calendar year.

9. The permittee shall continue to monitor CSO outfalls in accordance with section 4.2 to characterize CSO impacts and the efficacy of CSO controls.

10. The permittee has submitted the documentation that demonstrated implementation of each of the nine minimum controls in accordance with Section II.B of the U. S. EPA CSO Control Policy. The permittee submitted this documentation to the Department as an element of its 2020 Facilities Plan, approved by the Department on December 26, 2007.

4.3.4 CSO Performance Standards for Water Quality-Based Requirements The ISS shall be operated and maintained in a manner to achieve, in any given year, EITHER of the following two performance standards:

1. There shall be no more than six (6) combined sewer overflow (CSO) events in any calendar year. [OR]

Annual% Wet Weather Combined Sewage Capture for Treatment =

2. The total collection and conveyance of combined stormwater and wastewater to Jones Island WRF and South Shore WRF of no less than 85% by volume system wide of the combined sewage collected in the Combined Sewer System (CSS) as the result of precipitation events on an annual average basis. Compliance with this performance standard shall be reported on an annual basis, and calculated as:

Where, VCSO = total annual combined sewer overflow volume

VJI+SS = total annual volume of flow discharged at Jones Island and South Shore

Vdry = total annual dry weather flow, calculated by annualizing the average of the ten lowest days of total influent at the Jones Island WRF and the South Shore WRF, as determined by the permittee’s user charge system.

A CSO event is defined as one or more overflows from a combined sewer system, resulting from a precipitation event that does not receive minimum treatment. Minimum treatment is defined as: (a) primary clarification (removal of floatables and settleable solids and may be achieved by any combination of treatment technologies or methods that are shown to be equivalent to primary clarification; (b) solids and floatables disposal; and (c) disinfection.

4.3.4.1 Primary Treatment and Disinfection

In order to minimize combined sewer overflows from the conveyance system and provide the equivalent of primary treatment and disinfection for the maximum feasible volume of wet weather combined sewer flows, the permittee shall operate a combined sewer wet weather flow disinfection facility at the Jones Island Water Reclamation Facility during wet weather. This process consists of a channel that will route excess flow from the ISS directly to disinfection and is subject to the provisions outlined in section 3.2.2 of this permit.

4.3.4.2 Surface Water Quality Monitoring

Among the key pollutants for concern for the Milwaukee area watersheds are nutrients and bacteria. The permittee’s ongoing surface water quality monitoring program described in the most recent Surface Water Quality Monitoring Plan will be used to track water quality through the permit term. The permittee shall provide annual reports of monitoring results by June 30th of the following year as described in the monitoring plan and in accordance with section 8.2 of the permit.

4.3.4.3 Water Quality-Based Requirements – Wet Weather Management To meet the CSO performance standards in section 4.3.4 to reduce the duration, frequency, and magnitude of the overflows, and to reduce the adverse effects of overflows, the permittee shall implement wet weather management programs, such as the programs identified in the following table. The permittee shall provide biannual reports documenting the implementation of the programs required of this section by March 31st of each year. These reports shall identify the actions taken in the previous two years as outlined in section 8.3 of this permit.

Wet Weather Management Programs Program Description Goal Reduce the volume and peak flow rate of runoff entering the sewerage system.

• Fund green infrastructure implementation on public and private land.

• Establish a regional green infrastructure maintenance program.

• Implement and enforce runoff management requirements, according to MMSD Rules, Chapter 13.

Reduce inflow related to flooding by reducing the

• Undertake watercourse projects that include channel reconstruction number of structures in the regional floodplain.

and removal of structures from the floodplain.

• Protect or restore riparian land with hydric soils and wetlands.

Reduce inflow and infiltration in tributary sewerage systems

• Fund private property infiltration and inflow reduction programs with the goal of removing 56 million gallons on an annual basis by the end of the permit term.

• Implement and enforce the roof drain disconnection requirements of MMSD Rules, sec. 3.118.

• Implement and enforce wet weather peak flow management requirements for tributary metersheds, according to MMSD Rules, secs. 3.201 and 3.202.

Reduce non-point pollutant loadings into area waterways

• Acquire riparian buffers and provide treatment using green infrastructure.

• Support the implementation of agricultural practices that reduce pollutants in runoff.

• Continue to design and implement the Burnham Canal Wetlands Project which will ultimately use wetlands to treat CSO discharges to Burnham Canal, if they occur.

Improve aquatic habitat to increase the number and diversity of species

• Prepare a Water Quality Improvement Plan

• Undertake watercourse projects that include channel reconstruction and removal of structures from the floodplain.

• Implement the recommendations of the Urban Biodiversity Plan, as approved by the Department as part of the 2050 Facilities Plan.

• Support federal and state priority projects for reducing beneficial use impairments in the Milwaukee Estuary Area of Concern.

4.3.4.3.1 Green Infrastructure Retention Capacity

The permittee shall facilitate the implementation of green infrastructure retention capacity in watersheds within or tributary to the permittee’s service area. The total green infrastructure retention capacity goal to be achieved during the term of this permit is 50 million gallons with 20 million gallons of that being collected within the combined sewer area.

The permittee shall determine retention capacity using the following procedures:

1. Project-specific modeling;

2. A retention capacity calculating tool, such as the Green Infrastructure Sizing Calculator available at www.freshcoastguardians.com; or

3. The following table;

Green Infrastructure Practices Unit Retention Capacity Bioswales 7.5 gallons/square foot Cisterns/Rain Barrels 1 gallon/gallon Constructed Wetlands 8.3 gallons/square foot Floodplain Structure Removal 5,000 gallons/structure Green Alley or Street 6.2 gallons/square foot Green Roofs 1 gallons/square foot Native Landscaping 0.4 gallons/square foot Porous Pavement 3 gallons/square foot Rain Gardens 4.4 gallons/square foot Soil Amendments 0.2 gallons/square foot Stormwater Trees 25 gallons/tree http://www.freshcoastguardians.com/

Preservation of hydric soils or non-hydric soils with native landscaping

1.5 gallons/square foot

Other Practices As determined by the District and accepted by the Department

The permittee shall count green infrastructure towards the retention capacity goals when construction is complete.

Any green infrastructure practices/control measures that are put in place to fulfill the retention capacity goals must be maintained during the term of this permit.

4.3.4.4 Water Quality-Based Requirements – Regional Water Quality Improvement Plan The permittee will develop a Water Quality Improvement Plan (WQIP) for the Greater Milwaukee Watersheds within or tributary to the permittee’s planning area.