[Federal Register Volume 82, Number 183 (Friday, September 22, 2017)]
[Rules and Regulations]
[Pages 44320-44322]
[FR Doc No: 2017-20131]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R06-OAR-2015-0496; FRL-9967-53-Region 6]

Approval and Promulgation of Implementation Plans; Texas;
Reasonably Available Control Technology for the 2008 8-Hour Ozone
National Ambient Air Quality Standard

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: The Environmental Protection Agency (EPA) is conditionally
approving revisions to the Texas State Implementation Plan (SIP)
addressing Oxides of Nitrogen (NOX) Reasonably Available
Control Technology (RACT) for the Martin Marietta (formerly, Texas
Industries, Inc., or TXI) cement manufacturing plant in Ellis County.
We are fully approving revisions to the Texas SIP addressing
NOX RACT for all other affected sources in the ten county
Dallas Fort Worth (DFW) 2008 8-Hour ozone nonattainment area. We are
also approving NOX RACT negative declarations (a finding
that there are no major sources of NOX emissions in certain
categories) for the DFW 2008 8-Hour ozone nonattainment area. The DFW
2008 8-Hour ozone nonattainment area consists of Collin, Dallas,
Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant, and Wise
counties. The RACT requirements apply to major sources of
NOX in these ten counties.

DATES: This rule will be effective on October 23, 2017.

ADDRESSES: The EPA has established a docket for this action under
Docket ID No. EPA-R06-OAR-2015-0496. All documents in the docket are
listed on the www.regulations.gov Web site. Although listed in the
index, some information is not publicly available, e.g., Confidential
Business Information or other information whose disclosure is
restricted by statute. Certain other material, such as copyrighted
material, is not placed on the Internet and will be publicly available
only in hard copy form. Publicly available docket materials are
available either electronically through www.regulations.gov or in hard
copy at the Air Planning Section (6MM-AA), Environmental Protection
Agency, 1445 Ross Avenue, Suite 700, Dallas, Texas 75202-2733. The file
will be made available by appointment for public inspection in the
Region 6 FOIA Review Room between the hours of 8:30 a.m. and 4:30 p.m.
weekdays except for legal holidays.

FOR FURTHER INFORMATION CONTACT: Mr. Alan Shar (6MM-AA), telephone
(214) 665-2164, email<EMAIL_ADDRESS>
SUPPLEMENTARY INFORMATION: Throughout this document ``we,'' ``us,'' and
``our'' refer to EPA.

Outline

I. Background
II. Public Comments
III. Response to Comments
IV. Final Actions
V. Statutory and Executive Order Reviews

I. Background

    The background for this action is discussed in detail in the July
19, 2017 (82 FR 33026) proposal. In that document, the EPA proposed to
conditionally approve revisions to the Texas SIP that the TCEQ
submitted to EPA in its Appendix F (a component of the 2008 8-Hour DFW
ozone nonattainment area plan) of the July 10, 2015 DFW SIP submittal.
The July 19, 2017 Federal Register (FR) action proposed to
conditionally approve revisions to the Texas SIP addressing
NOX RACT for the Martin Marietta (MM) cement manufacturing
plant in Ellis County. See section 110(k)(4) of the Clean Air Act (CAA,
Act), and section II.F of the Proposal.
    We proposed to fully approve revisions to the Texas SIP addressing
NOX RACT for all other affected sources in the ten county
DFW 2008 8-Hour ozone nonattainment area. See section II.B of the
Proposal.
    We also proposed to approve NOX RACT negative
declarations for the nitric acid and adipic acid manufacturing
operations within the ten County DFW 2008 8-Hour ozone nonattainment
area. See section II.C of the Proposal.
    The Proposal and the Technical Support Document (TSD) prepared in
conjunction with that FR action provide detailed description and the
rationale for the proposed decisions. Please see the docket ID No. EPA-
R06-OAR-2015-0496 for the TSD and other documents regarding the
Proposal.

II. Public Comments

    The public comment period for the July 19, 2017 (82 FR 33026)
proposal expired on August 19, 2017, and we received relevant comments
from Holcim, TCEQ, and Ash Grove on the proposed actions during this
period. Our response to relevant comments received during public
comment period is below.

III. Response to Comments

    Comment #1: Holcim supported EPA's action on the Proposal.
    Response: We appreciate the support.
    Comment #2: TCEQ requested clarification on its SIP revision
process addressing conditional approval for the MM cement manufacturing
plant through a voluntary Agreed Order (AO) or rulemaking action.
    Response: State has the option of choosing what mechanism, for
example; a voluntary AO or rulemaking action, to use when revising its
SIP as long as a revision is made in conformance with section 110 of
the Act and applicable State law. No change to our NOX RACT
determination is made as a result of this comment.
    Comment #3: Ash Grove supported EPA's action, stating its
NOX limit is driven by 40 CFR 60.62 (New Source Performance
Standards--NSPS). The commenter contends that its air permit is not a
part of a federally enforceable SIP submittal.
    Response: We appreciate the support. The NOX RACT
emission limitation of 1.5 lb/ton of clinker produced is required per
40 CFR 60.62(a) or NSPS subpart F that is consistent with limits
established in Ash Grove's consent decree. We agree with the comment
that its air permit was not a component of TCEQ SIP submittal; however,
inclusion of air permit in record was intended to create a thorough and
complete docket. No change to our NOX RACT determination for
this plant is made as a result of this comment.
    This concludes our response to comments received. Based on our
evaluation and responses, no changes to the Proposed NOX
RACT determinations have been made. Therefore, we are

finalizing the 82 FR 33026 proposal as published on July 19, 2017.

IV. Final Actions

    We are conditionally approving NOX RACT for the MM
cement manufacturing plant in Ellis County, Texas. We are fully
approving revisions to the Texas SIP addressing NOX RACT for
all other affected sources in the ten county DFW 2008 8-Hour ozone
nonattainment area. We are also approving NOX RACT negative
declarations for the nitric acid and adipic acid manufacturing
operations within the ten County DFW 2008 8-Hour ozone nonattainment
area.
    The EPA had previously approved RACT for all affected
NOX sources under the 1-Hour and the 1997 8-Hour ozone
standards. Based on our approval of 30 TAC Chapter 117 rules for
control of nitrogen compounds on April 13, 2016 (81 FR 21747), and the
Proposed RACT action of July 19, 2017 (82 FR 33026), Texas is
implementing RACT for all affected NOX sources in the ten
County DFW area under the 2008 8-Hour ozone standard.

V. Statutory and Executive Order Reviews

    Under the CAA, the Administrator is required to approve a SIP
submission that complies with the provisions of the Act and applicable
Federal regulations. 42 U.S.C. 7410(k); 40 CFR 52.02(a). Thus, in
reviewing SIP submissions, the EPA's role is to approve state choices,
provided that they meet the criteria of the CAA. Additional information
about these statutes and Executive Orders can be found at http://www2.epa.gov/laws-regulations/laws-and-executive-orders.

A. Executive Order 12866: Regulatory Planning and Review, Executive
Order 13563: Improving Regulation and Regulatory Review and Executive
Order 13771: Reducing Regulations and Controlling Regulatory Costs

    This action is not a significant regulatory action and was
therefore not submitted to the Office of Management and Budget (OMB)
for review. This action is not an Executive Order 13771 regulatory
action because this action is not significant under Executive Order
12866.

B. Paperwork Reduction Act (PRA)

    This action does not impose an information collection burden under
the PRA because this action does not impose additional requirements
beyond those imposed by state law.

C. Regulatory Flexibility Act (RFA)

    I certify that this action will not have a significant economic
impact on a substantial number of small entities under the RFA. This
action will not impose any requirements on small entities beyond those
imposed by state law.

D. Unfunded Mandates Reform Act (UMRA)

    This action does not contain any unfunded mandate as described in
UMRA, 2 U.S.C. 1531-1538, and does not significantly or uniquely affect
small governments. This action does not impose additional requirements
beyond those imposed by state law. Accordingly, no additional costs to
State, local, or tribal governments, or to the private sector, will
result from this action.

E. Executive Order 13132: Federalism

    This action does not have federalism implications. It will not have
substantial direct effects on the states, on the relationship between
the national government and the states, or on the distribution of power
and responsibilities among the various levels of government.

F. Executive Order 13175: Coordination With Indian Tribal Governments

    This action does not have tribal implications, as specified in
Executive Order 13175, because the SIP is not approved to apply on any
Indian reservation land or in any other area where the EPA or an Indian
tribe has demonstrated that a tribe has jurisdiction, and will not
impose substantial direct costs on tribal governments or preempt tribal
law. Thus, Executive Order 13175 does not apply to this action.

G. Executive Order 13045: Protection of Children From Environmental
Health Risks and Safety Risks

    The EPA interprets Executive Order 13045 as applying only to those
regulatory actions that concern environmental health or safety risks
that the EPA has reason to believe may disproportionately affect
children, per the definition of ``covered regulatory action'' in
section 2-202 of the Executive Order. This action is not subject to
Executive Order 13045 because it does not impose additional
requirements beyond those imposed by state law.

H. Executive Order 13211: Actions That Significantly Affect Energy
Supply, Distribution, or Use

    This action is not subject to Executive Order 13211, because it is
not a significant regulatory action under Executive Order 12866.

I. National Technology Transfer and Advancement Act (NTTAA)

    Section 12(d) of the NTTAA directs the EPA to use voluntary
consensus standards in its regulatory activities unless to do so would
be inconsistent with applicable law or otherwise impractical. The EPA
believes that this action is not subject to the requirements of section
12(d) of the NTTAA because application of those requirements would be
inconsistent with the CAA.

J. Executive Order 12898: Federal Actions To Address Environmental
Justice in Minority Populations and Low-Income Population

    The EPA lacks the discretionary authority to address environmental
justice in this rulemaking.
    Under section 307(b)(1) of the Clean Air Act, petitions for
judicial review of this action must be filed in the United States Court
of Appeals for the appropriate circuit by November 21, 2017. Filing a
petition for reconsideration by the Administrator of this final rule
does not affect the finality of this action for the purposed of
judicial review nor does it extend the time within which a petition for
judicial review may be filed, and shall not postpone the effectiveness
of such rule or action. This action may not be challenged later in
proceedings to enforce its requirements. (See section 307(b)(2).)

    Authority:  42 U.S.C. 7401 et seq.

List of Subjects in 40 CFR Part 52

    Environmental protection, Air pollution control, Hydrocarbons,
Incorporation by reference, Intergovernmental relations, Nitrogen
dioxide, Ozone, Reporting and recordkeeping requirements, Volatile
organic compounds.

    Dated: September 12, 2017.
Samuel Coleman,
Acting Regional Administrator, Region 6.

    Part 52, chapter I, title 40 of the Code of Federal Regulations is
amended as follows:

PART 52--APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS

0
1. The authority citation for part 52 continues to read as follows:

    Authority: 42 U.S.C. 7401 et seq.

Subpart SS--Texas

0
2. In Sec.  52.2270(e) the table titled ``EPA approved nonregulatory
provisions and quasi-regulatory measures in the Texas SIP'' is amended
by adding three new entries at the end.
    The additions read as follows:

Sec.  52.2270  Identification of plan.

* * * * *
    (e) * * *

              EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Texas SIP
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                                                               State
     Name of SIP provision        Applicable geographic     submittal/     EPA approval date       Comments
                                  or non-attainment area  effective date
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                                                  * * * * * * *
Conditional approval of NOX      Ellis County, TX.......        07/10/15  09/22/17, [Insert   TCEQ commitment
 RACT finding for the Martin                                               FR page number      letter of July
 Marietta (formerly Texas                                                  where document      29, 2016.
 Industries, Inc., or TXI)                                                 begins].
 cement manufacturing plant
 under the 2008 8-Hour ozone
 NAAQS.
NOX RACT finding under the 2008  Collin, Dallas, Denton,        07/10/15  09/22/17, [Insert   DFW as Moderate
 8-Hour ozone NAAQS.              Tarrant, Ellis,                          FR page number      and Serious.
                                  Johnson, Kaufman,                        where document
                                  Parker, Rockwall, and                    begins].
                                  Wise Counties, TX.
NOX RACT finding of negative     Collin, Dallas, Denton,        07/10/15  09/22/17, [Insert   DFW as Moderate
 declarations for nitric acid     Tarrant, Ellis,                          FR page number      and Serious.
 and adipic acid operations       Johnson, Kaufman,                        where document
 under the 2008 8-Hour ozone      Parker, Rockwall, and                    begins].
 NAAQS.                           Wise Counties, TX.
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[FR Doc. 2017-20131 Filed 9-21-17; 8:45 am]
 BILLING CODE 6560-50-P


[Federal Register Volume 88, Number 139 (Friday, July 21, 2023)]
[Notices]
[Pages 47134-47135]
[FR Doc No: 2023-15492]

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DEPARTMENT OF ENERGY

Federal Energy Regulatory Commission

[Docket No. EL23-76-000]

Newark Energy Center, LLC; Notice of Institution of Section 206
Proceeding and Refund Effective Date

    On July 17, 2023, the Commission issued an order in Docket No.
EL23-76-000, pursuant to section 206 of the Federal Power Act (FPA), 16
U.S.C. 824e, instituting an investigation into whether Newark Energy
Center, LLC's Rate Schedule remains just and reasonable. Newark Energy
Center, LLC, 184 FERC ] 61,037 (2023).
    The refund effective date in Docket No. EL23-76-000, established
pursuant to section 206(b) of the FPA, will be the date of publication
of this notice in the Federal Register.
    Any interested person desiring to be heard in Docket No. EL23-76-
000 must file a notice of intervention or motion to intervene, as
appropriate, with the Federal Energy Regulatory Commission, in
accordance with Rule 214 of the Commission's Rules of Practice and
Procedure, 18 CFR 385.214 (2022), within 21 days of the date of
issuance of the order.
    In addition to publishing the full text of this document in the
Federal Register, the Commission provides all interested persons an
opportunity to view and/or print the contents of this document via the
internet through the Commission's Home Page (http://www.ferc.gov) using
the ``eLibrary'' link. Enter the docket number excluding the last three
digits in the docket number field to access the document. At this time,
the Commission has suspended access to the Commission's Public
Reference Room, due to the proclamation declaring a National

Emergency concerning the Novel Coronavirus Disease (COVID-19), issued
by the President on March 13, 2020. For assistance, contact FERC at
[email protected] or call toll-free,<PHONE_NUMBER> or TYY,
(202) 502-8659.
    The Commission strongly encourages electronic filings of comments,
protests and interventions in lieu of paper using the ``eFile'' link at
http://www.ferc.gov. In lieu of electronic filing, you may submit a
paper copy. Submissions sent via the U.S. Postal Service must be
addressed to: Kimberly D. Bose, Secretary, Federal Energy Regulatory
Commission, 888 First Street NE, Room 1A, Washington, DC 20426.
Submissions sent via any other carrier must be addressed to: Kimberly
D. Bose, Secretary, Federal Energy Regulatory Commission, 12225 Wilkins
Avenue, Rockville, Maryland 20852.
    The Commission's Office of Public Participation (OPP) supports
meaningful public engagement and participation in Commission
proceedings. OPP can help members of the public, including landowners,
environmental justice communities, Tribal members and others, access
publicly available information and navigate Commission processes. For
public inquiries and assistance with making filings such as
interventions, comments, or requests for rehearing, the public is
encouraged to contact OPP at<PHONE_NUMBER> or [email protected].

    Dated: July 17, 2023.
Debbie-Anne A. Reese,
Deputy Secretary.
[FR Doc. 2023-15492 Filed 7-20-23; 8:45 am]
BILLING CODE 6717-01-P


WPDES Permit No. WI 0046477 02 0 WPDES PERMIT STATE OF WISCONSIN DEPARTMENT OF NATURAL RESOURCES PERMIT TO DISCHARGE UNDER THE WISCONSIN POLLUTANT DISCHARGE ELIMINATION SYSTEM General Mitchell International Airport is permitted, under the authority of Chapter 283, Wisconsin Statutes, to discharge from a facility located at 5300 South Howell Avenue Milwaukee, WI 53207 6189 to Milwaukee River Basin ( Kinnickinnic River via Wilson Park Creek), Root River Basin ( Oak Creek), and the groundwater in these basins in accordance with the effluent limitations, monitoring requirements and other conditions set forth in this permit.

The permittee shall not discharge after the date of expiration. If the permittee wishes to continue to discharge after this expiration date an application shall be filed for reissuance of this permit, according to Chapter NR 200, Wis. Adm. Code, at least 180 days prior to the expiration date given below.

State of Wisconsin Department of Natural Resources For the Secretary By _________________________ Al Shea Director, Bureau of Watershed Management _________________________ Date of Signature EFFECTIVE DATE: January 01, 2001 EXPIRATION DATE: December 31, 2005 WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport TABLE OF CONTENTS 1 AIRPORT CO PERMITTEES 1 1.1 TENANT COVERAGE 1 1.2 CO PERMITTEE LIST 1 1.3 CHANGE IN AIRPORT TENANT STATUS 1 2 APPLICABILITY 3 2.1 PERMITTED AREA 3 2.2 AUTHORIZED DISCHARGES 3 2.3 WATER QUALITY STANDARDS 3 2.4 MAXIMUM EXTENT PRACTICABLE 3 2.5 PROGRAM RESOURCES 3 2.6 INDIVIDUAL RESPONSIBILITIES 3 2.7 JOINT RESPONSIBILITIES 4 2.8 NON CO PERMITTEES 4 3 AUTHORIZED DISCHARGES 5 3.1 STORM WATER DISCHARGES 5 3.2 PROCESS AND NON PROCESS WASTEWATER DISCHARGES 5 3.3 NON STORM WATER DISCHARGES 5 3.4 EXCLUSIONS 5 4 STORM WATER POLLUTION PREVENTION PLAN 7 5 INFLUENT REQUIREMENTS 8 5.1 SAMPLING POINT( S) 8 5.2 MONITORING REQUIREMENTS 8 5.2.1 Sampling Point 701  Inflow  Bailey's Pond 8 5.2.2 Sampling Point 601  Receiving Water  St. Luke's 9 5.2.3 Monitoring Special Conditions 9 6 IN PLANT REQUIREMENTS 11 6.1 SAMPLING POINT( S) 11 6.2 MONITORING REQUIREMENTS AND LIMITATIONS 11 6.2.1 Sampling Point 101 , 102, and 103 11 6.2.2 Applicability 11 6.2.3 Operating Requirements 11 6.2.4 Effluent Limitations and Monitoring Requirements 12 7 SURFACE WATER REQUIREMENTS 13 7.1 SAMPLING POINT( S) 13 7.2 MONITORING REQUIREMENTS AND EFFLUENT LIMITATIONS 13 7.2.1 Sampling Point ( Outfall) 001  Wilson Park Creek Cargo Ramp 13 7.2.2 Sampling Point ( Outfall) 003  Oak Creek 14 7.2.3 Sampling Point ( Outfall) 007  Wilson Park CreekTerminal Ramp 14 7.2.4 Monitoring Special Conditions 14 7.2.5 Discharge Requirements 16 8 SCHEDULES OF COMPLIANCE 19 8.1 ANNUAL INSPECTION 19 8.2 ANNUAL REPORT 19 8.2.1 Purpose 19 8.2.2 Certification 19 8.2.3 Contents 19 WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 8.3 FAILURE TO COMPLY WITH GLYCOL CAPTURE GOAL 19 8.4 DEICING AND ANTI ICING INFRASTRUCTURE 20 9 STANDARD REQUIREMENTS 21 9.1 REPORTING AND MONITORING REQUIREMENTS 21 9.1.1 Monitoring Results 21 9.1.2 Water Quality Sampling and Testing Procedures 21 9.1.3 Recording of Results 21 9.1.4 Reporting of Monitoring Results 21 9.1.5 Records Retention 22 9.1.6 Other Information 22 9.2 SYSTEM OPERATING REQUIREMENTS 22 9.2.1 Noncompliance Notification 22 9.2.2 Unscheduled Bypassing 22 9.2.3 Scheduled Bypassing 23 9.2.4 Proper Operation and Maintenance 23 9.2.5 Spill Reporting 23 9.2.6 Planned Changes 23 9.2.7 Duty to Halt or Reduce Activity 24 9.3 SURFACE WATER REQUIREMENTS 24 9.3.1 Determining Compliance with a Water Quality Based Effluent Limitation 24 9.3.2 Appropriate Formulas for Effluent Calculations 24 9.3.3 Visible Foam or Floating Solids 24 9.3.4 Whole Effluent Toxicity ( WET) Monitoring Requirements 25 10 SUMMARY OF REPORTS DUE 26 WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 1 1 Airport Co Permittees 1.1 Tenant Coverage Airport tenants with industrial activities associated with commercial air transportation at General Mitchell International Airport, may be co permittees with Milwaukee County, and be regulated under this permit. The airport co permittee list is subject to change according to Section 1.3. A tenant must be permitted if they meet the following two permitting criteria: 1. The owner or operator is in the air transportation business with a Standard Industrial Classification code of 4512, 4513, 1522, or 4581. and 2. The tenant is involved in maintenance, fueling, cleaning, or de icing.

1.2 Co Permittee List The following airport tenants have filed a certification with the Department to become a co permittee under this permit:

CARGO CARRIERS: Evergreen Aviation Federal Express Freight Runners Express United Parcel Service COMMERCIAL AIRLINES: America West Airlines American Eagle Airlines Astral Aviation ( Skyway Airlines) ComAir Airlines Continental Airlines Delta Air Lines Midwest Express Airlines Northwest Airlines Sun Country Airlines Trans World Airlines United Airlines US Airways CORPORATE HANGERS: Cessna Aircraft Scott Air Charter OTHER: Signature Flight Support Note: Milwaukee County and the airport tenants identified in the above list will be referred to as the co permittees. Reference in the permit to permittee means co permittee.

1.3 Change in Airport Tenant Status Milwaukee County shall promptly notify the Department when it becomes aware of a change in tenant status which could require a tenant to become a co permittee ( or otherwise obtain an individual permit) or to be deleted from the co permittee list, by submitting information about the change to the Department. If the tenant desires to become a co WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 2 permittee instead of obtaining an individual permit, the Department shall modify the permit ( without a notice as allowed under s. 283.53( 2d)( d), Wis. Stats) by issuing a new airport co permittee list which identifies the tenants covered under the General Mitchell International Airport WPDES permit. Tenants required to be permitted under ( a) or ( b) below shall submit to the Department, through Milwaukee County, a written agreement that specifies the date the new co permittee assumes responsibility for compliance with the permit and liability for violations of the permit. The following situations require a revision to the airport tenant list: ( a) A new tenant who begins operating at the airport, and meets the permitting criteria, shall be added to the airport co permittee list unless the tenant elects to obtain an individual permit.

( b) An existing tenant not previously identified on the airport co permittee list, who meets the permitting criteria, shall be added to the airport co permittee list unless the tenant elects to obtain an individual permit.

( c) A co permittee, who changes their name from what is currently on the airport co permittee list, shall have their name corrected on the airport co permittee list.

( d) A co permittee, who discontinues their activities and no longer operates at the airport, shall be removed from the airport co permittee list.

( e) A tenant identified on the airport co permittee list, who no longer meets the permitting criteria, shall be removed from the airport co permittee list.

Note: Refer to the airport co permittee list for the criteria that requires a tenant to be permitted. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 3 2 Applicability 2.1 Permitted Area This permit covers areas at General Mitchell International Airport within the jurisdiction of Milwaukee County, contributing to discharges from the airport's separate storm sewer system. Separate storm sewer system means a conveyance or system of conveyances including storm sewers, roads with drainage systems, roadways, catch basins, curbs, gutters, ditches, constructed channels or storm drains. Upstream off site flows into the separate storm sewer system from outside the permitted area are excluded from coverage under this permit and are not the responsibility of the co permittees. See Section 3.4 for exclusions from coverage under this permit.

2.2 Authorized Discharges This permit authorizes storm water point source discharges to waters of the State from the separate storm sewer system in the permitted area. This permit also authorizes the discharge of storm water commingled with flows contributed by process wastewater, non process wastewater, and storm water associated with industrial activity, provided such discharges are regulated under this or other WPDES permits or are not significant sources of pollutants.

2.3 Water Quality Standards This permit specifies the conditions under which storm water can be discharged so the receiving water quality standards contained in chs. NR 102 to NR 105, Wis. Adm. Code, are met to the maximum extent practicable. Except as otherwise permitted or authorized by this permit, storm water discharges may not contain pollutants which would cause a violation of water quality standards. For the term of this permit, implementation of the best management practices in the storm water pollution prevention plan, shall constitute compliance with water quality standards. The narrative type general storm water discharge limitations, described in Section <IP_ADDRESS>, are also intended to address water quality standards.

2.4 Maximum Extent Practicable Permittees shall develop and implement a storm water pollution prevention plan and best management practices designed to limit to the maximum extent practicable the discharge of pollutants from the separate storm sewer system. The Department shall consider other environmental problems and safety requirements facing the permittees, and will emphasize cost effective pollution prevention solutions when determining what is practicable.

2.5 Program Resources Permittees shall provide adequate finances, staff, equipment, and support capabilities to implement their storm water pollution prevention plan.

2.6 Individual Responsibilities Milwaukee County, as the owner and airport authority, shall act as the airport representative and shall coordinate copermittee efforts to achieve permit compliance. Milwaukee County and each airport tenant identified as a copermittee is individually responsible for: ( a) Compliance with permit conditions relating to discharges from the separate storm sewer system where it is the operator.

( b) Storm water pollution prevention plan implementation on portions of the separate storm sewer system where it is the operator.

( c) Collection of monitoring data required in Sections 5, 6 and 7. Agreements may be established between copermittees to consolidate monitoring responsibilities.

( d) Compliance with annual reporting requirements as specified in Section 8.2, relating to the portions of the airport's separate storm sewer system for which they are responsible. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 4 2.7 Joint Responsibilities Co permittees are jointly responsible for permit compliance on those shared portions of the separate storm sewer system where one or more co permittees jointly discharge to or operates a portion of the separate storm sewer system.

2.8 Non Co Permittees Discharges by non co permittee tenants may not cause any of the General Mitchell International Airport permittees to be in violation of the terms of this permit. If a discharge by a non co permittee causes a violation of Wisconsin law or regulation, Milwaukee County will examine the legal obligation of the non co permittee under the tenant lease agreement with the County, and will take whatever action, if any, it deems appropriate. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 5 3 Authorized Discharges 3.1 Storm Water Discharges This permit regulates storm water point source discharges to waters of the State from the permitted area upstream from the outfalls listed in Table 7.1. Outfalls 003 and 007 have several drainage basins and storm water inflow points associated with them, including inflows from off site of the permitted area. General Mitchell International Airport shall not be held responsible for discharges tributary to the airport drainage system not under its authority. Portions of airport's separate storm sewer system are also the receiving water. Intermittent or marginal streams that run through the airport have been channelized into ditches or directed through underground separate storm sewers. Outfall 003 is a channelized ditch with dry weather flow, and is a tributary to the Oak Creek. Outfall 007 is the confluence of two large concrete enclosed storm sewers with dry weather flow, and is part of Wilson Park Creek tributary to the Kinnickinnic River. Note: There may be other minor outfalls or discharge points where runoff may leave the permitted area, such as intermittent channelized flow. These discharges are also authorized.

3.2 Process and Non Process Wastewater Discharges This permit also regulates wastewater discharges to the airport's separate storm sewer system. These discharges include the following:   Deicing and anti icing activities   Contaminated groundwater   Oil and water separators 3.3 Non Storm Water Discharges Non storm water discharges to the separate storm sewer system are prohibited, unless the discharge is innocuous or allowed under a WPDES permit. Permittees shall evaluate all storm water outfalls for non storm water contributions and illicit connections. Methods may include a review of as built schematics or drainage plans of the storm water collection system, end of pipe screening during dry weather, dye testing, physical inspection of the storm water collection system, or other appropriate monitoring. Milwaukee County completed this evaluation during the 1994 dry weather screening conducted in the development of the storm water pollution prevention plan. Continued inspections for non storm water discharges shall continue as appropriate, with a repeat evaluation at least every 5 years, to achieve and maintain compliance with this condition. If an evaluation isn't feasible due to lack of access, include a statement explaining why.

3.4 Exclusions Excluded from coverage under this permit are the following: ( a) Areas located on General Mitchell International Airport property, which are segregated from the industrial activities associated with the airport, such as office building, parking lots, and undeveloped areas, may not need to be permitted. The exclusion status shall be revoked if storm water runoff from areas normally excluded mix or commingle with storm water drainage from pollution sources covered under the storm water pollution prevention plan, prior to discharging from the permitted area.

( b) Areas off site or upstream from the permitted area which discharge into the separate storm sewer system.

( c) Airport tenants who do not meet the permitting criteria. Note: Refer to the airport tenant list for the criteria that requires a tenant to be permitted.

( d) Non storm water discharges that are not considered illicit discharges, unless identified by either the permittee or the Department as a significant source of pollutants to waters of the State. Innocuous non storm water discharges, as listed below, may enter the separate storm sewer system. However, the permittee shall incorporate WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 6 appropriate control measures in the storm water pollution prevention plan if any of these discharges are identified as significant sources of pollutants.

  Water line flushing   Landscape irrigation   Diverted stream flows   Uncontaminated ground water infiltration   Uncontaminated pumped ground water   Discharges from potable water sources   Foundation drains   Air conditioning condensate   Irrigation water   Lawn watering   Individual private vehicle or aircraft washing   Flows from riparian habitats and wetlands   Pavement wash water   Fire fighting WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 7 4 Storm Water Pollution Prevention Plan General Mitchell International Airport shall follow the " Storm Water Pollution Prevention Plan" prepared under the previous permit. Implementation of the plan shall be a continuing activity. The plan shall be amended where necessary to minimize the discharge of pollutants to the maximum extent practicable. The glycol management controls of the plan shall be revised as necessary to comply with the glycol capture goal. If the glycol capture goal is not attained, as reported in an annual report, the airport shall take the necessary measures to meet the goal the next deicing season. Refer to Section <IP_ADDRESS> that describes the annual glycol capture goal, and Section 8.2 for the schedule of compliance. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 8 5 Influent Requirements 5.1 Sampling Point( s)

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

701 Inflow from the City of Cudahy and Wisconsin Air National Guard 128th on the east central side of the airport. 601 Receiving water monitoring location approximately 5 miles downstream from Outfall 007. Sampling station is at Wilson Park Creek just before the confluence with the Kinnickinnic River, and across from St. Luke's Hospital.

5.2 Monitoring Requirements The permittee shall comply with the following monitoring requirements.

5.2.1 Sampling Point 701  Inflow  Bailey's Pond Monitoring Requirements and Limitations Parameter Limit Type Limit and Units Sample Frequency Sample Type Notes Ethylene glycol mg/ L Annual Composite Propylene glycol mg/ L Annual Composite BOD5, Total mg/ L Annual Composite COD mg/ L Annual Composite Suspended Solids, Total mg/ L Annual Composite Nitrogen, Ammonia ( NH3 N) Total mg/ L See Permit Composite <IP_ADDRESS> ( c)

Nitrogen, Total Kjeldahl mg/ L See Permit Composite <IP_ADDRESS> ( c)

Dissolved Oxygen mg/ L Annual Grab pH Field su Annual Composite Hardness, Total as CaCO3 mg/ L See Permit Composite <IP_ADDRESS> ( c)

Copper, Total Recoverable µ g/ L See Permit Composite <IP_ADDRESS> ( c)

Lead, Total Recoverable µ g/ L See Permit Composite <IP_ADDRESS> ( c)

Zinc, Total Recoverable µ g/ L See Permit Composite <IP_ADDRESS> ( c) WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 9 5.2.2 Sampling Point 601  Receiving Water  St. Luke's Monitoring Requirements and Limitations Parameter Limit Type Limit and Units Sample Frequency Sample Type Notes Ethylene glycol mg/ L 3/ Year Composite Propylene glycol mg/ L 3/ Year Composite BOD5, Total mg/ L 3/ Year Composite COD mg/ L 3/ Year Composite Suspended Solids, Total mg/ L 3/ Year Composite Nitrogen, Ammonia ( NH3 N) Total mg/ L See Permit Composite <IP_ADDRESS> ( c)

Nitrogen, Total Kjeldahl mg/ L See Permit Composite <IP_ADDRESS> ( c)

Dissolved Oxygen mg/ L 3/ Year Grab pH Field su 3/ Year Composite Hardness, Total as CaCO3 mg/ L See Permit Composite <IP_ADDRESS> ( c)

Copper, Total Recoverable µ g/ L See Permit Composite <IP_ADDRESS> ( c)

Lead, Total Recoverable µ g/ L See Permit Composite <IP_ADDRESS> ( c)

Zinc, Total Recoverable µ g/ L See Permit Composite <IP_ADDRESS> ( c)

5.2.3 Monitoring Special Conditions <IP_ADDRESS> Purpose The airport shall monitor an inflow up stream and the receiving water down stream for use to evaluate the effectiveness of the storm water pollution prevention plan in controlling the discharge of pollutants. Visual inspections shall look for obvious problems, and the chemical analysis shall provide specific water quality data, both tools for evaluation of the best management practices. Storm water monitoring shall consist of the following:

<IP_ADDRESS> Monitoring Locations The visual inspections and sample collections shall be taken at the locations identified in Table 5.1. The location numbers are as indicated on airport's sampling map included in the storm water pollution prevention plan. Sample Point 701 ( formerly 07AI) monitors an up stream inflow. Sample Point 601 ( formerly 07W) monitors the receiving water quality downstream of airport's discharges.

<IP_ADDRESS> Visual Inspections Visually inspect the outfalls listed in Table 5.1 to characterize the quality of storm water discharged during the " first flush" of storm water runoff from representative storms or snow melts. Within the first 30 minutes of when runoff first appears at the monitoring location, or as soon thereafter as practicable, observations of the discharge shall be made. Characterization of runoff quality shall include observations for color, odor, turbidity, floating solids, foam, oil sheen, or other obvious indicators of storm water pollution. Documentation shall include the inspection date, inspector, summary of observations, and probable sources of observed storm water pollution. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 10 <IP_ADDRESS> Chemical Analysis Sample the outfalls listed in Table 5.1 for chemical analysis to quantify pollutants of concern. The parameters listed in Tables 5.2.1, and 5.2.2 above represents the Department's minimum required chemical analysis that shall be conducted.

<IP_ADDRESS> Sampling Procedure The following requirements apply to collecting samples when chemical analysis is conducted: ( a) Samples shall be collected from storms which are preferably at least 50% of the monthly average precipitation event amount, but no less than 0.1 inch rain. The runoff event sampled shall be at least 72 hours from the previously measurable precipitation event greater than 0.1 inch.

( b) The storm water sample shall be representative of the " first flush" of storm water runoff. When runoff first appears in the outfall or as soon thereafter as practicable, a sample shall be collected during a 30 minute period. A minimum of 3 sample portions, evenly spaced throughout the 30 minute sampling period, shall be collected for a composite sample. As an alternative, a " flow weighted composite" sample for the entire storm water event may be collected in place of the " first flush" composite. In addition, a grab sample shall be collected within the first 30 minutes of the runoff for those parameters being analyzed that require a grab sample. If the storm water discharge is from a storage facility with at least 24 hours holding time, a representative grab shall be collected from the storage facility for analysis of all parameters.

( c) When sampling snow melt and deicing or anti icing events, best professional judgment shall be used for when to collect a representative sample.

( d) A narrative description shall be provided of each storm event which is sampled, including the date and duration of the storm, precipitation amount ( if snowfall include inches of snow and rainfall equivalent), the duration between the storm event sampled and the end of the previous measurable storm of greater than 0.1 inch rainfall, and an estimate of the total volume of storm water discharged.

( e) Approved analytical methods shall be used in accordance with ch. NR 219, Wis. Adm. Code " Analytical Test Methods and Procedures", or guidance on storm water sampling procedures developed by the Department. When no analytical method is approved, a suitable method may be used provided a description of the method is submitted to the department for concurrence prior to sampling.

<IP_ADDRESS> Monitoring Frequency The permittee shall conduct monitoring during each reporting period of July 1 to June 30, which includes one contiguous deicing season. When a chemical sample is collected, a visual inspection shall be done concurrently. All monitoring locations shall be sampled during the same storm or snow melt event if possible. ( a) Visual inspections shall be made quarterly every year. At least 2 of the quarterly monitoring dates shall be during a deicing or anti icing event.

( b) Samples collected for chemical analysis are required every year, at the minimum frequency specified in Table 5.2.1, and 5.2.2. Chemical monitoring samples shall be collected during a deicing or anti icing event. Additional samples may be collected as necessary for data collection.

( c) Monitoring of ammonia nitrogen, total Kjeldahl nitrogen, hardness, copper, lead, and zinc are only required the first and last year of the permit.

<IP_ADDRESS> Sampling Exemption If the permittee is unable to collect samples due to adverse climatic conditions, the permittee shall describe why samples could not be collected in the annual report. An exemption from the monitoring requirements shall be given for just cause, however, this does not relieve the permittee of complying with the monitoring requirements when weather conditions allow sampling. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 11 6 In Plant Requirements 6.1 Sampling Point( s)

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

101 Milwaukee County hydrant fueling system pump station oil and water separator, which serves both the aviation and ground service equipment fueling areas. 102 Signature Flight Support aviation fuel tank oil and water separator. 103 Cessna/ Citation fuel farm oil and water separator.

6.2 Monitoring Requirements and Limitations The permittee shall comply with the following monitoring requirements and limitations.

6.2.1 Sampling Point 101 , 102, and 103 Monitoring Requirements and Limitations Parameter Limit Type Limit and Units Sample Frequency Sample Type Notes Flow Rate gpd Quarterly Estimated Oil & Grease ( Hexane) Daily Max 15 mg/ L Quarterly Grab Suspended Solids, Total Daily Max 40 mg/ L Quarterly Grab 6.2.2 Applicability Permittees may discharge into the separate storm sewer system treated contaminated storm water discharged from oil water separators, in accordance with the conditions in this section. The following are operators of oil and water separators at General Mitchell International Airport:   Milwaukee County Hydrant Fueling System Pump Station .   Signature Flight Support.   Cessna/ Citation.   Any other co permittee with an oil and water separator.

6.2.3 Operating Requirements Permittees shall comply with the following: ( a) The oil and water separator treatment controls for petroleum contaminated storm water runoff, shall be adequately sized, designed, operated and maintained. Plans and specifications for any new oil and water separator shall be submitted to the Department for approval prior to construction, in accordance with ch. NR 108, Wis. Adm. Code. ( b) No matgerials shall intentionally be dumped in the oil and water separator for treatment or storage. ( c) Accumulated solids, oil and grease shall be removed on a periodic basis to maintain the efficiency of the separator. The water discharge side of the separator shall be clean so there is no oil sheen or scum. All removed substances shall be properly disposed of. ( d) There shall be no leakage form any containment berms, dikes or tanks. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 12 6.2.4 Effluent Limitations and Monitoring Requirements The discharge shall be limited and monitored by the permittee as follows: ( a) The oil and water separator shall be inspected at least quarterly for proper operation.

( b) Document the volume of waste oil recovered, date of removal, who removed it, and the ultimate fate of the waste oil.

( c) The discharge is subject to the general storm water discharge limitations in Paragraph <IP_ADDRESS>.

( d) Samples shall be collected from oil and water separator effluent prior to discharge to the separate storm sewer system, from each of the oil and water separators at the airport.

( e) Effluent samples shall be collected from the Sample Points identified in Table 6.1, and be analyzed as specified in Table 6.2.1.

( f) For all petroleum storage tanks, submit in the annual report the following information:

1. Method used to handle and dispose of petroleum storage tank condensate, the volume of condensate discharged, and the frequency of the discharge.

2. If petroleum storage tank condensate is discharged, the condensate shall be analyzed for benzene, ethylbenzene, lead ( if lead additives are used), total phenols, toluene, and xylene. Detection of any of the above parameters in the condensate may result in a determination by the Department that the discharge is not allowable if it is a significant source of pollutants. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 13 7 Surface Water Requirements 7.1 Sampling Point( s)

The discharge( s) shall be limited to the waste type( s) designated for the listed sampling point( s).

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

001 Discharge of storm water runoff, from the Cargo Ramp area to Wilson Park Creek tributary to Kinnickinnic River. The outfall is located on the west of the airport. 003 Discharge of storm water runoff from the southern most runways and taxiways to a tribuary of Oak Creek. The outfall is located at the southeast corner of the airport at College Avenue. 007 Discharge of storm water from the terminal ramp area plus the runways and taxiways on the northcentral parts of the airport to Wilson Park Creek tributary to the Kinnickinnic River. The outfall is located at the northwest corner of the airport at Howell and Layton Avenues.

7.2 Monitoring Requirements and Effluent Limitations The permittee shall comply with the following monitoring requirements and limitations.

7.2.1 Sampling Point ( Outfall) 001  Wilson Park Creek Cargo Ramp Monitoring Requirements and Effluent Limitations Parameter Limit Type Limit and Units Sample Frequency Sample Type Notes Flow Rate gal/ yr Annual Estimated Ethylene glycol mg/ L Annual Composite Propylene glycol mg/ L Annual Composite BOD5, Total mg/ L Annual Composite COD mg/ L Annual Composite Suspended Solids, Total mg/ L Annual Composite Nitrogen, Ammonia ( NH3 N) Total mg/ L See Permit Composite <IP_ADDRESS> ( c)

Nitrogen, Total Kjeldahl mg/ L See Permit Composite <IP_ADDRESS> ( c)

Oil & Grease ( Hexane) mg/ L Annual Grab Dissolved Oxygen mg/ L Annual Grab pH Field su Annual Composite WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 14 7.2.2 Sampling Point ( Outfall) 003  Oak Creek Monitoring Requirements and Effluent Limitations Parameter Limit Type Limit and Units Sample Frequency Sample Type Notes Flow Rate gal/ yr Annual Estimated 7.2.3 Sampling Point ( Outfall) 007  Wilson Park CreekTerminal Ramp Monitoring Requirements and Effluent Limitations Parameter Limit Type Limit and Units Sample Frequency Sample Type Notes Flow Rate gal/ yr Annual Estimated Ethylene glycol mg/ L 3/ Year Composite Propylene glycol mg/ L 3/ Year Composite BOD5, Total mg/ L 3/ Year Composite COD mg/ L 3/ Year Composite Suspended Solids, Total mg/ L 3/ Year Composite Nitrogen, Ammonia ( NH3 N) Total mg/ L See Permit Composite <IP_ADDRESS> ( c)

Nitrogen, Total Kjeldahl mg/ L See Permit Composite <IP_ADDRESS> ( c)

Oil & Grease ( Hexane) mg/ L Annual Grab Dissolved Oxygen mg/ L 3/ Year Grab pH Field su 3/ Year Composite Hardness, Total as CaCO3 mg/ L See Permit Composite <IP_ADDRESS> ( c)

Copper, Total Recoverable µ g/ L See Permit Composite <IP_ADDRESS> ( c)

Lead, Total Recoverable µ g/ L See Permit Composite <IP_ADDRESS> ( c)

Zinc, Total Recoverable µ g/ L See Permit Composite <IP_ADDRESS> ( c)

7.2.4 Monitoring Special Conditions <IP_ADDRESS> Purpose The airport shall monitor discharges into the separate storm sewer system to evaluate the effectiveness of the storm water pollution prevention plan in controlling the discharge of pollutants. Visual inspections shall look for obvious problems, and the chemical analysis shall provide specific water quality data, both tools for evaluation of the best management practices. Storm water monitoring shall consist of the following: WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 15 <IP_ADDRESS> Monitoring Locations The visual inspections and sample collections shall be taken at the locations identified in Table 7.1. The location numbers are as indicated on airport's sampling map included in the storm water pollution prevention plan. Outfalls 001, 003, and 007 monitor the water quality of the airport's discharges.

<IP_ADDRESS> Visual Inspections Visually inspect the outfalls listed in Table 7.1 to characterize the quality of storm water discharged during the " first flush" of storm water runoff from representative storms or snow melts. Within the first 30 minutes of when runoff first appears at the monitoring location, or as soon thereafter as practicable, observations of the discharge shall be made. Characterization of runoff quality shall include observations for color, odor, turbidity, floating solids, foam, oil sheen, or other obvious indicators of storm water pollution. Documentation shall include the inspection date, inspector, summary of observations, and probable sources of observed storm water pollution.

<IP_ADDRESS> Chemical Analysis Sample the outfalls listed in Table 6.1 for chemical analysis to quantify pollutants of concern. The effluent parameters listed in Tables 7.2.1, 7.2.2, and 7.2.3 represents the Department's minimum required chemical analysis that shall be conducted. Outfall 003 only needs estimated flow, a chemical analysis is not required unless a visual inspections indicates the potential presence of pollutants at levels of concern.

<IP_ADDRESS> Sampling Procedure The following requirements apply to collecting samples when chemical analysis is conducted: ( a) Samples shall be collected from storms which are preferably at least 50% of the monthly average precipitation event amount, but no less than 0.1 inch rain. The runoff event sampled shall be at least 72 hours from the previously measurable precipitation event greater than 0.1 inch.

( b) The storm water sample shall be representative of the " first flush" of storm water runoff. When runoff first appears in the outfall or as soon thereafter as practicable, a sample shall be collected during a 30 minute period. A minimum of 3 sample portions, evenly spaced throughout the 30 minute sampling period, shall be collected for a composite sample. As an alternative, a " flow weighted composite" sample for the entire storm water event may be collected in place of the " first flush" composite. In addition, a grab sample shall be collected within the first 30 minutes of the runoff for those parameters being analyzed that require a grab sample. If the storm water discharge is from a storage facility with at least 24 hours holding time, a representative grab shall be collected from the storage facility for analysis of all parameters.

( c) When sampling snow melt and deicing or anti icing events, best professional judgment shall be used for when to collect a representative sample.

( d) A narrative description shall be provided of each storm event which is sampled, including the date and duration of the storm, precipitation amount ( if snowfall include inches of snow and rainfall equivalent), the duration between the storm event sampled and the end of the previous measurable storm of greater than 0.1 inch rainfall, and an estimate of the total volume of storm water discharged.

( e) Approved analytical methods shall be used in accordance with ch. NR 219, Wis. Adm. Code " Analytical Test Methods and Procedures", or guidance on storm water sampling procedures developed by the Department. When no analytical method is approved, a suitable method may be used provided a description of the method is submitted to the department for concurrence prior to sampling.

<IP_ADDRESS> Monitoring Frequency The permittee shall conduct monitoring during each reporting period of July 1 to June 30, which includes one contiguous deicing season. When a chemical sample is collected, a visual inspection shall be done concurrently. All monitoring locations shall be sampled during the same storm or snow melt event if possible. ( a) Visual inspections shall be made quarterly every year. At least 2 of the quarterly monitoring dates shall be during a deicing or anti icing event. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 16 ( b) Samples collected for chemical analysis are required every year, at the minimum frequency specified in Table 7.2.1, 7.22, and 7.2.3. Chemical monitoring samples shall be collected during a deicing or anti icing event. Additional samples may be collected as necessary for data collection.

( c) Monitoring of ammonia nitrogen, total Kjeldahl nitrogen, hardness, copper, lead, and zinc are only required the first and last year of the permit.

<IP_ADDRESS> Flow Volume Estimate the volume of storm water and wastewater discharged from Outfalls 001, 003, and 007. The estimate and method of calculation shall be provided in the annual report.

<IP_ADDRESS> Pollutant Loading The permittee shall estimate the annual pollutant loading from spent deicing and anti icing chemicals discharged from the permitted area into the storm sewer system. Data shall be maintained on: ( a) The amount and type of deicer or anti icer used each reporting period.

( b) The estimated amount of glycol captured for recycling or disposal, and the volume discharged into the sanitary sewer.

( c) The estimated amount of glycol discharged in runoff to the separate storm sewer system, with a brief description on the how the estimate was calculated.

Note: The aircraft deicing and anti icing is believed to be the major source of glycol discharged. However, best professional judgment of other sources of glycol discharged shall be estimated. The estimate provided here shall represent a comprehensive discharge amount that includes the entire permitted area.

( d) The weather conditions that required deicing or anti icing, to determine the correlation between the weather and amount of deicer and anti icer used.

( e) The air traffic, to determine the correlation between air traffic and amount of deicer and anti icer used.

Note: The permittee may determine what the relevant air traffic data is. This is intended to be data that is currently readily available, not some new monitoring requirement on detailed air traffic accounting.

<IP_ADDRESS> Sampling Exemption If the permittee is unable to collect samples due to adverse climatic conditions, the permittee shall describe why samples could not be collected in the annual report. An exemption from the monitoring requirements shall be given for just cause, however, this does not relieve the permittee of complying with the monitoring requirements when weather conditions allow sampling.

7.2.5 Discharge Requirements <IP_ADDRESS> General Discharge Limitations Permittees may not discharge from the separate storm sewer system the following substances in amounts that may adversely effect receiving water quality or aquatic life: ( a) Deicing and anti icing chemicals, including ethylene glycol, propylene glycol, urea, and any substitute chemicals.

( b) Solids and sand that may settle to form putrescent or otherwise objectionable sludge or sediment deposits.

( c) Oil, grease, fuel and other floating material that form noticeable accumulations of debris, scum, foam, or sheen.

( d) Color or odor that is unnatural and to such a degree as to create a nuisance.

( e) Toxic substances in toxic amounts to aquatic life, wildlife, or humans.

( f) Nutrients conductive to the excessive growth of aquatic plants and algae to the extent that such growths are detrimental to desirable forms of aquatic life, create conditions that are unsightly, or are a nuisance.

( g) Any other substances that may impair beneficial uses of the receiving water. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 17 <IP_ADDRESS> Maximum Extent Practicable The design and sizing of the deicing and anti icing controls for the glycol management area shall be based on a costeffective analysis of the control concept to reduce glycol discharges to the maximum extent practicable. The control strategy may be based on the US EPA's 1994 Combined Sewer Overflow Policy " Presumption" approach. This strategy would target a minimum of 85% capture of glycol contaminated runoff, excluding fugitive glycol, from the glycol management area based upon total glycol usage during each deicing season. At an 85% capture rate, the permittee is presumed to be in compliance unless this capture rate is determined to be non cost effective. The permittee shall estimate the capture rate of glycol in the annual report based on the volumes and concentration of glycol applied to aircraft and captured through deicing and anti icing control efforts. Note: For the purposes of this permit, the glycol management area is defined as the airport terminal area and cargo ramp area where the majority of the aircraft deicing and anti icing occurs.

<IP_ADDRESS> Fugitive Glycol The percent of glycol captured and percent discharged will only apply to the glycol draining onto the glycol management area. It is assumed 50% of the total glycol in Type I aircraft deicing fluids ( ADFs) and 15% of the glycol in Type IV aircraft anti icing fluids ( AAFs) used on ramps and applied to aircraft will drain to the glycol management area. The other 50% of the glycol in Type I ADF and 85% of glycol in AAF is considered fugitive and can not be cost effectively captured. Fugitive glycol includes glycol that shears off aircraft upon take off, glycol that dissipates as vapor into the atmosphere, and glycol used outside the glycol management area. Any reduction in the amount glycol discharged represents the reduction that may result from a maximum of 50% of the total amount of glycol in Type I ADF and 15% of the glycol in Type IV AAF used. Note: If future data indicates a different value for the fugitive percentage is more accurate, that shall be used. The 50% and 85% numbers on based upon current finding at several airports and represent the best estimate available.

<IP_ADDRESS> Conservation Efforts Recent advances in aircraft deicing practices and technology have resulted in significant reductions in total glycol required to effectively deice or anti ice an aircraft. The amount of glycol required to coat an aircraft and provide adequate hold over time remains approximately the same. The reductions in glycol use are largely the result of minimizing ADF runoff. As a result, there is less glycol available for capture. Fugitive glycol remains about the same. These advances make it necessary to account for the effects of source reduction and conservation in calculating an appropriate capture target with the objective of 85% of the collectable glycol.

The effects of any conservation efforts and new technologies by co permittees shall be referenced to a baseline of historical glycol usage rates. The benefit of any individual technology and/ or conservation effort will be described as shown in equations ( 1) and ( 2) below:

Equation ( 1): C i = ADF A i ÷ ADF B i C i = Fraction of baseline used by co permittee " i" with new technologies and conservation practices in place. ADF A i = Type I aircraft deicing fluid " Actually" used by co permittee " i". ADF B i = Type I aircraft deicing fluid used under " Baseline" conditions by co permittee " i".

The amount of glycol used shall be expressed in gallons of 100% product undiluted during a deicing season ( usually October through April).

Equation ( 2): C =

C i X i C = Composite fraction applicable to airport representing all the co permittees. X i = Proportion of all Type I ADF used by co permittee " i".

Documented performance data shall be provided on the new technologies and conservation practices to serve as the basis for agreed upon values of " C i", along with an accurate characterization of relative total Type I ADF usage by the co permittee under baseline conditions, to serve as the basis for " X i". WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 18 <IP_ADDRESS> Collectable Type I Aircraft Deicing Fluids Based on data for Type I usage, the amount of collectable Type I fluid assumes 20% " A" remains on the aircraft, 30% " L" is lost as not collectable, for a total loss of 50% fugitive. The original total amount of glycol used " T" is reduced by a fraction " C" when conservation efforts are implemented. The collectable runoff " R" equals 50% before conservation efforts, but with conservation efforts " RC" will equal less than 50%.

ADF Glycol Usage = TC = AT + LTC + RCT RC = ( 1   A/ C   L) = 0.7   ( 0.2 ÷ C) = Fraction of total ADF as collectable runoff with conservation efforts.

Type I = Sum of all the Type I glycol used by the co permittees during a deicing season.

Collectable Type I = RC ×

Type I = ( 1   A/ C   L) ×

Type I <IP_ADDRESS> Collectable Type IV Aircraft Anti icing Fluids Based on data for Type IV usage, approximately 85% of the applied Type IV AAF remains on the aircraft. The remaining 15% is considered to be collectable runoff.

Type IV = Sum of all the Type IV glycol used by the co permittees during a deicing season.

Collectable Type IV = 0.15 ×

Type IV <IP_ADDRESS> Annual Glycol Capture Goal Glycol reduction shall be in accordance with the deicing and anti icing management controls in the approved Storm Water Pollution Prevention Plan. As a measurement of performance, a glycol capture goal shall be determined based on capturing 85% of the collectable glycol runoff. The permittee shall compare the amount of glycol applied for deicing and anti icing with the estimated amount of glycol captured. This comparison provides a measurement of the effectiveness on the glycol management controls to prevent discharges of glycol contaminated runoff into the separate storm sewer system. If the percent captured for disposal or recycling meets or exceeds the annual glycol capture goal percentage, the airport shall be considered in compliance.

A glycol capture goal shall be recalculated in each annual report according to equations ( 3) and ( 4) below, using the data from the current deicing season for C,

Type I, and

Type IV:

Equation ( 3): 85% Collectable Glycol = 0.85[( 0.7   ( 0.2 ÷ C)] ×

Type I + 0.85 × ( 0.15 ×

Type IV)

C =

C i X i = Composite fraction applicable airport wide.

Equation ( 4): Goal = [[ 0.595   ( 0.17 ÷ C) ] ×

Type I + 0.1275 ×

Type IV ] ÷ (

Type I +

Type IV) × 100.

The glycol capture goal in the initial permit issuance, where C is 100% for baseline conditions, was 85% of 50% of the glycol or 42.5% of the total glycol used. It is understood the glycol capture goal will now be less than 42.5%, because C is less than 100% due to conservation efforts, and with the increased use of Type IV glycol there is a smaller amount of collectable glycol. Future calculations of the capture goal percentage may include other factors, such as weather conditions and airport growth that may affect the amount of collectable glycol. to more accurately determine what the capture goal percentage should be. Any revision to calculation of the glycol capture goal requires Department approval. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 19 8 Schedules of Compliance 8.1 Annual Inspection Perform and document a comprehensive annual facility site inspection. The inspection shall verify that the site drainage conditions and potential pollution sources identified in the storm water pollution prevention plan remain accurate, that the best management practices prescribed in the plan are being implemented, and properly operated and maintained. Information reported must include the date of inspection, inspector, summary of observations, and if any amendments are needed to the storm water pollution prevention Plan. The annual inspection shall be conducted during the deicing season, and the findings submitted with the annual report.

8.2 Annual Report 8.2.1 Purpose The information provided in the annual report shall be used to determine progress on implementation of the storm water pollution prevention plan and compliance with the conditions in the permit.

8.2.2 Certification Milwaukee County shall sign and certify the annual report and include a statement or resolution that the co permittee's governing body or delegated representatives have reviewed or been appraised of the content of the annual report.

8.2.3 Contents The permittee shall prepare an annual report for the 12 month period of July 1 through June 30, so a deicing season is wholly contained in one reporting period. The annual report shall be submitted no later than 3 months after the completed reporting period ( by September 30). The report shall include the following: ( a) The status of implementing the storm water pollution prevention plan, and compliance with permit schedules. ( b) An updated site map where necessary to identify of any new outfalls, structural controls, or other note worthy changes.

( c) A summary describing activities in the storm water pollution prevention plan that have measurable results, and an assessment of the effectiveness of best management practices.

( d) A summary of any amendments made or proposed to the storm water pollution prevention plan.

( e) A summary of the monitoring data required in Sections 5, 6, and 7.

( f) A summary of the glycol management, including calculation of the glycol capture goal and documentation of the airport's performance in recovering the glycol as required in Section 7.2.5.

( g) Identification of receiving water quality improvements or degradation resulting from airport activities. ( h) A general fiscal summary of the estimated costs for storm water program activities, which includes the following: 1. The annual expenditures for the previous year with a breakdown of expenses for the major elements of the program. 2. The budget for the current year with an estimated breakdown of the expenses for the major elements of the program.

8.3 Failure to Comply with Glycol Capture Goal If the airport fails to comply with the annual glycol capture goal for a deicing season, additional efforts shall be made to comply with the next years glycol capture goal. An amendment to the storm water pollution prevention plan shall WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 20 be submitted in the annual report proposing additional efforts or changes. The next year's annual report shall evaluate the success of the additional efforts or changes.

8.4 Deicing and Anti icing Infrastructure The airport may continue to use temporary equipment and continue pilot activities to minimize the release of glycol to the environment and maximize the capture glycol runoff that is collectable. Because of the emerging technologies in glycol management controls, the airport is allowed this operational flexibility. When conditions warrant the construction of permanent infrastructure for glycol management, the airport shall proceed expeditiously to do so. If plans for permanent facilities are not completed during the term of this permit, the next permit reissuance will address that need. There is no compliance schedule at this time for permanent infrastructure. The interim temporary measures must perform adequately and comply with the glycol capture goal.

Facilities for glycol controls must receive DNR plan approval if they fall under the description of a reviewable wastewater treatment system project, in accordance with ch. NR 108, Wis. Adm. Code. Submit plans for any wastewater storage structures, sewer system modifications, or any other runoff management facilities that would be reviewable. Allow 90 days for DNR approval of the plans, prior to construction. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 21 9 Standard Requirements NR 205, Wisconsin Administrative Code ( Conditions for Industrial Dischargers): The conditions in ss. NR 205.07( 1) and NR 205.07( 3), Wis. Adm. Code, are included by reference in this permit. The permittee shall comply with all of these requirements. Some of these requirements are outlined in the Standard Requirements section of this permit. Requirements not specifically outlined in the Standard Requirement section of this permit can be found in ss. NR 205.07( 1) and NR 205.07( 3).

9.1 Reporting and Monitoring Requirements 9.1.1 Monitoring Results Monitoring results obtained during the deicing season reporting period shall be summarized and submitted to the Department with the annual report. If the permittee monitors any parameter more frequently or additional parameters that what is required by this permit, the results of such monitoring shall be included in the annual report.

The permittee shall comply with all limits for each parameter regardless of monitoring frequency. For example, monthly, weekly, and/ or daily limits shall be met even with monthly monitoring. The permittee may monitor more frequently than required for any parameter.

Monitoring reports shall be signed by a principal executive officer, a ranking elected official, or other duly authorized representative.

9.1.2 Water Quality Sampling and Testing Procedures Sampling and laboratory testing procedures shall be performed in accordance with Chapters NR 218 and NR 219, Wis. Adm. Code and shall be performed by a laboratory certified or registered in accordance with the requirements of ch. NR 149, Wis. Adm. Code. Groundwater sample collection and analysis shall be performed in accordance with ch. NR 140, Wis. Adm. Code. The analytical methodologies used shall enable the laboratory to quantitate all substances for which monitoring is required at levels below the effluent limitation. If the required level cannot be met by any of the methods available in NR 219, Wis. Adm. Code, then the method with the lowest limit of detection shall be selected. Additional test procedures may be specified in this permit.

9.1.3 Recording of Results For each effluent measurement or sample taken, the permittee shall record the following information:

  the date, exact place, method and time of sampling or measurements;

  the individual who performed the sampling or measurements;

  the date the analysis was performed;

  the individual who performed the analysis;

  the analytical techniques or methods used; and   the results of the analysis.

9.1.4 Reporting of Monitoring Results The permittee shall use the following conventions when reporting effluent monitoring results:

  Effluent concentrations less than the limit of detection shall be reported as < ( less than) the value of the limit of detection. For example, if a substance is not detected at a detection limit of 0.1 mg/ L, report the effluent concentration as < 0.1 mg/ L. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 22   Effluent concentrations equal to or greater than the limit of detection, but less than the limit of quantitation, shall be reported and the limit of quantitation shall be specified.

  For the purposes of calculating an average or a mass discharge value, the permittee may substitute a 0 ( zero) for any effluent concentration that is less than the limit of detection. However, if the effluent limitation is less than the limit of detection, the department may substitute a value other than zero for results less than the limit of detection, after considering the number of monitoring results that are greater than the limit of detection and if warranted when applying appropriate statistical techniques.

9.1.5 Records Retention The permittee shall retain records of all monitoring information, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by the permit, and records of all data used to complete the application for the permit for a period of at least 3 years from the date of the sample, measurement, report or application, except for sludge management forms and records, which shall be kept for a period of at least 5 years.

9.1.6 Other Information Where the permittee becomes aware that it failed to submit any relevant facts in a permit application or submitted incorrect information in a permit application or in any report to the Department, it shall promptly submit such facts or correct information to the Department.

9.2 System Operating Requirements 9.2.1 Noncompliance Notification   The permittee shall report the following types of noncompliance by a telephone call to the Department's regional office within 24 hours after becoming aware of the noncompliance;

  any noncompliance which may endanger health or the environment;   any violation of an effluent limitation resulting from an unanticipated bypass;   any violation of an effluent limitation resulting from an upset; and   any violation of a maximum discharge limitation for any of the pollutants listed by the Department in the permit.   A written report describing the noncompliance shall also be submitted to the Department's regional office within 5 days after the permittee becomes aware of the noncompliance. On a case by case basis, the Department may waive the requirement for submittal of a written report within 5 days and instruct the permittee to submit the written report with the next regularly scheduled monitoring report. In either case, the written report shall contain a description of the noncompliance and its cause; the period of noncompliance, including exact dates and times; the steps taken or planned to reduce, eliminate and prevent reoccurrence of the noncompliance; and if the noncompliance has not been corrected, the length of time it is expected to continue.

  The permittee shall give advance notice to the Department of any planned changes in the permitted facility or activity which may result in noncompliance with permit requirements.

9.2.2 Unscheduled Bypassing Any unscheduled diversion or bypass of wastewater at the treatment works or collection system is prohibited except in the following cases:

  an inadvertent bypass resulting from equipment damage or temporary power interruption; WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 23   an unavoidable bypass necessary to prevent loss of life or severe property damage; or   a bypass of excessive storm drainage or runoff which would damage any facilities necessary for compliance with the effluent limitations and prohibitions of the permit.

In the event of an unscheduled bypass, the permittee shall immediately notify the Department regional office by telephone within 24 hours after an occurrence. In addition, the permittee shall notify the Department by letter within 5 days after each such unscheduled diversion or unscheduled bypass. The written notification shall at a minimum include reasons for such unscheduled bypass including dates, length of bypass and steps taken or planned to correct and eliminate such occurrences.

9.2.3 Scheduled Bypassing Any construction or normal maintenance which results in a bypass of wastewater from a treatment system is prohibited unless authorized by the Department in writing. If the Department determines that there is significant public interest in the proposed action, the Department may schedule a public hearing or notice a proposal to approve the bypass. Each request shall specify the following minimum information:

  proposed date of bypass;

  estimated duration of the bypass;

  estimated volume of the bypass;

  alternatives to bypassing; and   measures to mitigate environmental harm caused by the bypass.

9.2.4 Proper Operation and Maintenance The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control which are installed or used by the permittee to achieve compliance with the conditions of this permit. The wastewater treatment facility shall be under the direct supervision of a state certified operator as required in s. NR 108.06( 2), Wis. Adm. Code. Proper operation and maintenance includes effective performance, adequate funding, adequate operator staffing and training as required in ch. NR 114, Wis. Adm. Code, and adequate laboratory and process controls, including appropriate quality assurance procedures. This provision requires the operation of back up or auxiliary facilities or similar systems only when necessary to achieve compliance with the conditions of the permit.

9.2.5 Spill Reporting The permittee shall notify the Department in accordance with ch. NR 706 ( formerly NR 158), Wis. Adm. Code, in the event that a spill or accidental release of any material or substance results in the discharge of pollutants to the waters of the state at a rate or concentration greater than the effluent limitations established in this permit, or the spill or accidental release of the material is unregulated in this permit, unless the spill or release of pollutants has been reported to the Department in accordance with s. NR 205.07 ( 1)( s), Wis. Adm. Code.

9.2.6 Planned Changes In accordance with ss. 283.31( 4)( b) and 283.59, Stats., the permittee shall report to the Department any facility expansion, production increase or process modifications which will result in new, different or increased discharges of pollutants. The report shall either be a new permit application, or if the new discharge will not violate the effluent limitations of this permit, a written notice of the new, different or increased discharge. The notice shall contain a description of the new activities, an estimate of the new, different or increased discharge of pollutants and a description of the effect of the new or increased discharge on existing waste treatment facilities. Following receipt of WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 24 this report, the Department may modify this permit to specify and limit any pollutants not previously regulated in the permit.

9.2.7 Duty to Halt or Reduce Activity Upon failure or impairment of treatment facility operation, the permittee shall, to the extent necessary to maintain compliance with its permit, curtail production or wastewater discharges or both until the treatment facility operations are restored or an alternative method of treatment is provided.

9.3 Surface Water Requirements 9.3.1 Determining Compliance with a Water Quality Based Effluent Limitation   When the water quality based effluent limitation is less than the limit of detection, levels less than the limit of detection are in compliance with the effluent limitation.

  When the water quality based effluent limitation is less than the limit of detection, effluent levels greater than the limit of detection, but less than the limit of quantitation are in compliance with the effluent limitation except when analytically confirmed and statistically confirmed by a sufficient number of analyses of multiple samples and use of appropriate statistical techniques.

  When the water quality based effluent limitation is greater than the limit of detection, but less than the limit of quantitation, levels less than the limit of detection or less than the limit of quantitation are in compliance with the effluent limitation.

  When the water quality based effluent limitation is expressed in the permit as a daily maximum or average mass limitation, compliance is determined as stated above in this section after converting the limit of detection ( LOD) and limit of quantitation ( LOQ) to mass values using the actual daily effluent flow ( or actual average effluent flow for the averaging period). To convert LOD and LOQ from concentration to mass values use the following formula:

  LODmass or LOQmass ( in lbs/ day) = LOD or LOQ ( in mg/ L) x Flow ( in MGD) x 8.34 9.3.2 Appropriate Formulas for Effluent Calculations The permittee shall use the following formulas for calculating effluent results to determine compliance with average limits and mass limits:

Weekly/ Monthly average concentration = the sum of all daily results for that week/ month, divided by the number of results during that time period.

Weekly Average Mass Discharge ( lbs/ day)

Daily mass = daily concentration ( mg/ L) x daily flow ( MGD) x 8.34 Average the daily mass values for the week.

Monthly Average Mass Discharge ( lbs/ day)

Daily mass = daily concentration ( mg/ L) x daily flow ( MGD) x 8.34 Average the daily mass values for the month.

9.3.3 Visible Foam or Floating Solids There shall be no discharge of floating solids or visible foam in other than trace amounts. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 25 9.3.4 Whole Effluent Toxicity ( WET) Monitoring Requirements In order to determine the potential impact of the discharge on aquatic organisms, static renewal toxicity tests shall be performed on the effluent in accordance with the procedures specified in the " State of Wisconsin Aquatic Life Toxicity Testing Methods Manual, Edition 1" ( PUBL WW 033 096, as required by NR 219.04, Table A, parameters 9 & 10, footnote 8, Wis. Adm. Code). Receiving water samples shall not be collected from any point in contact with the permittee's mixing zone and every attempt shall be made to avoid contact with any other discharge's mixing zone. Whole effluent toxicity tests are not required under this permit. But if tests are conducted, the permittee shall report test results in the annual report. WPDES Permit No. WI 0046477 02 0 General Mitchell International Airport 26 10 Summary of Reports Due FOR INFORMATIONAL PURPOSES ONLY Description Annual Report Date September 30th Page 19 All submittals required by this permit shall be submitted to the Bureau of Watershed Management and the Southeast Regional Headquarters except as follows. Any Facility Plans and/ or Engineering Plans and Specifications shall be submitted to the Bureau of Watershed Management, P. O. Box 7921, Madison, WI, 53707 7921.