Attachment 5(k) - Tanks Pipes P2 Plan_Final.pdf

P2 Plan, Potable Water System Discharges June 2017 i

TABLE OF CONTENTS

List of Acronyms and Abbreviations .............................................................................. ii

Pollution Prevention Plan Certification/Delegation of Authority .................................... iii

1.0 Introduction

2.0 Purpose

3.0 Background Information

4.0 Types of Discharges

5.0 Pollutants of Concern

6.0 BMPs

6.1 Planning, Scheduling, and Operating Procedures

6.2 Dechlorination

6.3 Erosion and Sediment Controls

7.0 Monitoring Requirements

8.0 Other Permit Requirements

9.0 Other Permitted Discharges

9.1 Wastewater from Fire Control Systems

9.2 Storm Water Discharges from Petroleum Storage Containment Structures 8

10.0 References

APPENDICES

NPDES Permit No. MDG67 .......................................................................... Appendix A

NOI Application and Approval Letter ............................................................ Appendix B

Water Distribution System Map .................................................................... Appendix C

Flushing Schedule and Locations ................................................................ Appendix D

SOPs ............................................................................................................ Appendix E

Monitoring Results......................................................................................... Appendix F

P2 Plan, Potable Water System Discharges June 2017 ii

LIST OF ACRONYMS AND ABBREVIATIONS

APG Aberdeen Proving Ground

AST Aboveground Storage Tank

BMP Best Management Practice

CFR Code of Federal Regulation

CWA Clean Water Act

DMR Discharge Monitoring Report

DPW Directorate of Public Works

EPA Environmental Protection Agency

FY Fiscal Year

MDE Maryland Department of Environment

NOI Notice of Intent

NPDES National Pollutant Discharge Elimination System

P2 Pollution Prevention

SOP Standard Operating Procedure

WTP Water Treatment Plant

P2 Plan, Potable Water System Discharges June 2017 iii

POLLUTION PREVENTION PLAN CERTIFICATION

"I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations."

VANCE G. HOBBS DATE

Chief, Environmental Division Directorate of Public Works

APG

DELEGATION OF AUTHORITY

“Mr. Vance Hobbs, Chief of the Directorate of Public Works Environmental Division for APG, is a duly authorized representative of the undersigned and is empowered to certify that this document and all its attachments were prepared in accordance with a system designed to ensure that qualified personnel properly gathered and evaluated the information submitted. The above named individual is responsible for certifying that the information submitted is, to the best of my knowledge and belief, true, accurate, and complete.”

COL JAMES E. DAVIS DATE

Commander

APG

P2 Plan, Potable Water System Discharges June 2017

1.0 INTRODUCTION

The Federal Clean Water Act (CWA) authorizes the United States Environmental Protection Agency (EPA) to regulate discharges to surface waters and prevent pollution.

To comply with this law, the EPA requires facilities discharging pollutants to waters of the U.S. be permitted under the National Pollutant Discharge Elimination System (NPDES), or a state administered NPDES [40 Code of Federal Regulation (CFR) Part 122.28]. In 1990, under the authority of the CWA, EPA adopted regulations for regulating storm water and non-stormwater discharges to surface water and storm drain conveyances by incorporating such discharges into the NPDES system.

The EPA considers potable water system releases to pose a minimal threat to the environment. Therefore, such releases are generally allowed as non-storm water releases pursuant to 40 CFR, Part 122.28. However, the Maryland Department of the Environment (MDE), who has been delegated authority by the EPA to issue NPDES permits, has further regulated potable water system releases.

MDE’s General Permit for Discharges from Tanks, Pipes, and Other Liquid Containment Structures at Facilities Other Than Oil Terminals (NPDES Permit No. MDG67) regulates several types of non-storm water discharges, including discharges from potable water systems. Other eligible discharges under the permit applicable to Aberdeen Proving Ground (APG) include wastewater from draining or flushing of fire control systems and storm water discharges from petroleum storage tank containment structures. Permit requirements for these discharges will be discussed in Section 9.0 of this plan. A copy of the permit is located in Appendix A. The letter authorizing coverage under this permit will be kept alongside a copy of the Notice of Intent (NOI) in Appendix B.

2.0 PURPOSE

The general permit requires the development and implementation of a best management practice (BMP)-based Pollution Prevention (P2) Plan. The purpose of this plan is to identify potential sources of pollution resulting from potable water system discharges and implement technology-based BMPs to minimize APG’s environmental impacts.

3.0 BACKGROUND INFORMATION

APG is located within Harford County, Maryland, and comprises approximately 72,500 acres. The Bush River divides the installation into two peninsulas: the Aberdeen Area (APG-North) and the Edgewood Area (APG-South). Other areas include the Churchville Test Track also located within Harford County, Maryland, and Carroll Island and Graces Quarters located within Baltimore County, Maryland. In operation since

P2 Plan, Potable Water System Discharges June 2017

1917, APG is a military installation involved in the research, development, and testing of weapons systems, ordnance, and biological and chemical defenses. Water is supplied to APG from several different sources and through arrangements between APG, Harford County, and the City of Aberdeen. APG-North and APG-South are served by two independent and unconnected water supply systems.

APG-North is served by the Chapel Hill Water Treatment Plant (WTP), which is owned and operated by the City of Aberdeen. The City of Aberdeen is responsible for the maintenance and repairs of the water distribution system on APG-North and, therefore, will not be included in this P2 Plan.

APG-South is served by the Van Bibber WTP, which is owned and operated by the Department of the Army and serves approximately 6,000 people. The WTP is located about 2 miles north of the installation, northwest of the intersection of U.S. Route 40 and Edgewood Road. Raw water is supplied by Winters Run and conveyed to the Hanson Reservoir, a 1.75-million gallon underground storage tank (located off the installation), before proceeding to APG-South’s water distribution system. APG-South has several elevated tanks on the installation, however, only the underground reservoir is in use.

During periods of low flow in Winters Run, the U.S. Army has an agreement to purchase water from Harford County to maintain supply on APG-South through a piping tie-in at the WTP. A map of APG-South’s water distribution system is located in Appendix C.

4.0 TYPES OF DISCHARGES

Under the general permit, APG is authorized to discharge water from the overflow, draining, or dewatering of reservoirs, vessels, or structures used to store or convey potable water for consumption – includes: standing water, and water from flushing, hydrostatic testing, mechanical cleaning, water main breaks, leaks, or other releases.

Discharges from APG’s water distribution system can be classified as either planned or unplanned. Planned discharges result from operations and maintenance activities such as disinfection of mains, testing of hydrants, storage tank/reservoir dewatering and routine flushing of distribution system lines and mains for maintenance. Unplanned discharges from water distribution systems include overflows and discharges from main breaks and leaks in the distribution system.

Table 4-1 details the types of potable water system discharges APG anticipates over the permit term and a schedule of these events.

P2 Plan, Potable Water System Discharges June 2017

Table 4-1. Potable Water System Releases and Schedule

Type of Release Schedule

Planned Releases

Pipeline Flushing April – October

Pipeline Disinfection (pipeline replacement)

As needed

Dewatering Mains (maintenance or construction activities)

As needed

Reservoir Dewatering Currently

Reservoir Cleaning Planned for Fiscal Year (FY)19

Hydrostatic Testing of Pipelines (new construction)

As needed

Unplanned Releases

Water Main Break N/A

Reservoir Overflow N/A

System Leak N/A

Annually, from April to October, DPW conducts unidirectional flushing of the potable water distribution system utilizing 19 automatic hydrant flushers. When the auto flushers are in service, APG can discharge 4,000-9,500 gallons per day. The auto flushers run at various lengths of time and use 100-250 gallons each flush. There are times when a flusher may be run manually, resulting in varying discharge volumes.

As of June 1, 2017, the contract for unidirectional flushing has not been awarded. The schedule for current flushing operations is located in Appendix D. Once the contract has been awarded, a map detailing the locations of unidirectional flushing operations will be included in Appendix D. The schedule and locations for subsequent annual flushing operations will also be maintained in Appendix D.

Hydrostatic testing, flushing, and disinfection are conducted when new pipelines are installed or repairs to existing pipelines are made. These activities include mechanical cleaning and super chlorination.

The Hanson Reservoir is currently empty while the reservoir roof is repaired. Once repairs are complete, the reservoir will be cleaned and placed back in service.

Completion for this is expected in FY19.

5.0 POLLUTANTS OF CONCERN

The typical pollutants of concern associated with potable water system discharges are total residual chlorine and, depending on the type of discharge, total suspended solids and oil and grease.

P2 Plan, Potable Water System Discharges June 2017

Water treated for public distribution is required to be disinfected, usually with chlorine, to prevent the growth of bacteria and algae while in the distribution system. Chlorine at these levels is safe for humans to consume but extremely toxic to aquatic wildlife;

therefore, discharges of treated drinking water have the potential to adversely affect aquatic systems.

Discharges from distribution piping systems (such as fire hydrant flushing) flow across impervious surfaces into storm drain catchments or directly into waterways, picking up debris, sediments, and oils. Additionally, discharges may cause erosion within their flow path, also contributing sediment into waterways. Table 5-1 lists potential pollutants of concern associated with each type of potable water system discharge.

Table 5-1. Pollutants of Concern

Type of Release Pollutant Pollution Potential

Pipeline Flushing Chlorine, Sediment, Biofilm, Metals Low

Pipeline Disinfection Chlorine, Sediment, Biofilm Low

Dewatering Mains Chlorine, Sediment, Biofilm, Metals Low

Reservoir Dewatering Chlorine, Sediment, Biofilm, Metals Low

Reservoir Cleaning Chlorine, Sediment, Biofilm, Metals Low

Hydrostatic Testing of Pipelines Chlorine, Sediment Low

Unplanned Potable Water System Releases (overflows, leaks, broken water main, etc.)

Chlorine, Sediment, Biofilm

Moderate

6.0 BMPS

APG will implement BMPs designed to comply with the following permit requirements:

The discharge may not adversely affect the quality or the beneficial uses of the waters of the state;

Potable water must be dechlorinated prior to discharge; and

The discharge may not cause erosion and/or sedimentation.

APG will implement BMPs prior to and during the discharge events listed in Table 4-1.

This plan will be updated when necessary to address any changes to BMPs.

P2 Plan, Potable Water System Discharges June 2017

6.1 PLANNING, SCHEDULING, AND OPERATING PROCEDURES

Most potable water system discharges are scheduled and prepared for in advance.

APG determines where and when discharges take place, the volume to be discharged, flow rate, frequency, and any potential environmental impacts. APG informs the public of planned discharge events through their website and social media to ensure public safety.

Standard Operating Procedures (SOPs) have been developed for planned and unplanned releases that outline the appropriate BMPs to implement for these activities.

These SOPs are located in Appendix E.

6.2 DECHLORINATION

All discharges are dechlorinated at the point of discharge using dechlorination tablets containing sodium sulfite, which are added to diffusers to remove chlorine in the discharge. Discharges are monitored for residual chlorine and additional control measures implemented, if necessary, to reduce chlorine levels.

6.3 EROSION AND SEDIMENT CONTROLS

At each discharge location, personnel conduct a physical site survey that includes evaluating the release area, discharge volume, and flow path to determine environmental impacts and appropriate BMP use.

Where feasible, the flow path is cleared of all loose debris and surface contaminants.

At times, the flow path may be redirected using a hose to avoid parking lots and housing yards. Erosion and sediment control devices will be placed in the flow path and/or at storm drain inlets to prevent erosion and the transport of sediment. These control devices include: wattles, filter bags, gravel bags, temporary drain inlet sediment filter bags or mats, and rip-rap.

APG utilizes automatic flushers to control the volume of discharge, flushing no more water than is necessary to achieve maintenance goals. The automatic flushers are fitted with diffusers to control flow rate and prevent scouring.

Following discharge events, personnel will clear the flow path of residual sediment and debris and remove all control devices.

In the event of water main breaks and overflows, soil erosion and sediment controls are implemented based on practices identified in the 2011 Maryland Standards and Specifications for Soil Erosion and Sediment Control.

P2 Plan, Potable Water System Discharges June 2017

7.0 MONITORING REQUIREMENTS

Discharges related to super chlorination and mechanical cleaning of potable water pipes and tanks must meet the limitations specified in Table 7-1 at the final discharge point.

Monitoring results obtained by APG during each calendar quarter will be summarized on a discharge monitoring report (DMR) form. Results must be submitted to MDE and postmarked no later than the 28th day of the month following the end of each calendar quarter (28 March, 28 June, 28 September, and 28 December). Results of this monitoring will also be maintained in Appendix F.

8.0 OTHER PERMIT REQUIREMENTS

In addition to the implementation of the BMPs in this P2 Plan, APG will ensure discharges do not cause the temperature of the receiving waters (beyond a mixing zone that in still water extends 50 feet radially from the outfall and in flowing water, 50 feet from the outfall in the direction of flow at the time of measurement) to exceed:

68°F in Use III or III-P receiving waters, 75°F in Use IV or IV-P receiving waters, and

90°F in Use I, I-P, or II receiving waters.

If the ambient temperature of the receiving waters exceeds these standards, the temperature of the discharge will not exceed (to the nearest °F) the ambient temperature of the receiving waters.

Discharges over 100,000 gallons or those that equal at least half the flow in the receiving stream that occur between May 1st and November 1st must comply with the temperature limits identified above. APG will measure the temperature of the discharge water within a half-hour prior to its discharge. If the temperature of the discharge water exceeds 68°F, APG will measure the temperature of the receiving water at the edge of the mixing zone midway through the discharge period.

Results of this monitoring will be maintained in Appendix F.

APG will take all necessary measures to prevent erosion damage during discharges.

Gullying greater than six inches in depth is considered excessive erosion.

P2 Plan, Potable Water System Discharges June 2017

Table 7-1. Monitoring Requirements for Super Chlorination and Mechanical Cleaning of Potable Water Pipes and Tanks

Shall be measured for the period of discharge and the flow divided by the time over which the discharge occurred.

The temperature difference shall be measured as follows: The discharge shall not cause the temperature of the receiving waters to exceed the water quality criteria described above, or if the ambient stream temperature already exceeds those criteria, then the discharge shall not cause a measureable rise in the receiving water temperature beyond a mixing zone.

The allowable mixing zone for temperature in still water is 50 feet radially from the outfall and in flowing water, 50 feet from the discharge point (outfall) in the direction of flow at the time of measurement. To quantify these variables, this permit expresses the results as “temperature difference”, which is the arithmetic result of subtracting the effluent temperature or the temperature at the effluent first, and if the temperature is less than or equal to the stream standard, no in-stream measurements+ are necessary and the permittee shall report “<0” on the discharge monitoring report (DMR).

Monthly Average Daily Maximum Total Quarterly

Flow Units

Flow Report Report Report gpd 1/discharge Measured¹

Monthly Average Units

Total Residual

Chlorine µg/L

Monitoring required only if the test or disinfection water, or flushing water (potable water systems, only) has been chlorinated or comes from a chlorinated water supply.

The minimum quantification level for total residual chlorine is 0.10 mg/L. Report all results below the minimum level as "<0.10 mg/L"

Total

Suspended

Solids mg/L Not required for discharges from disinfection of potable water pipes or tanks unless Mechanical Cleaning has been performed.

Dissolved

Oxygen

5.0 mg/L for discharges to

Use I, I-P, and II waters

6.0 mg/L for discharges to

Use III, III-P, IV, and IV-P waters mg/L Monitoring required only if the wastewater is chemically dechlorinated.

pH 6.0 s.u.

Temperature °F 2/discharge i-s

Required May through October only for use III, III-P, IV, and IV-P waters; at beginning of discharge and midway through discharge.

The receiving stream standards are as follows:

1) Use III and III-P: 68°F

2) Use IV and IV-P: 75°F

3) Use I, I-P, and II: 90°F

Temperature

Difference 0² °F 2/discharge i-s

Frequency Sample Type Parameter-Specific

Requirements

Quantity or Concentration

Daily Maximum

Quantity or Loading

Parameter

3 grab samples, evenly spaced over the course of each discharge period, shall be collected and analyzed separately

Report

9.0

19 (fresh water)

13 (salt water)

P2 Plan, Potable Water System Discharges June 2017

9.0 OTHER PERMITTED DISCHARGES

9.1 WASTEWATER FROM FIRE CONTROL SYSTEMS

In addition to the permit requirements outlined in Section 8.0 of this plan, discharges from fire control systems will not contain chlorine or chlorine-containing compounds except in nondetectable levels (COMAR 26.08.03.06). The nondetectable level will be less than 0.1 mg/L as determined using either the DPD titrimetric or colorimetric method or an alternative method approved by MDE. Also, discharges shall not contain a visible oil sheen, floating solids, or persistent foam.

9.2 STORM WATER DISCHARGES FROM PETROLEUM STORAGE

CONTAINMENT STRUCTURES

APG is authorized to discharge storm water from within dikes, berms, walls or any other containment structure for aboveground petroleum storage sites with a storage capacity of 10,000 gallons or more. APG has 13 petroleum aboveground storage tanks (ASTs) with a storage capacity of 10,000 gallons or more that have either secondary or tertiary containment. These ASTs are listed in Table 9-1.

Monitoring is required for this type of discharge only if a spill or leak of petroleum product has occurred in the containment area. Monitoring requirements are outlined in Table 9-2. Monitoring results obtained by APG during each calendar quarter will be summarized on a DMR form. Results must be submitted to MDE and postmarked no later than the 28th day of the month following the end of each calendar quarter (28 March, 28 June, 28 September, and 28 December). Results of this monitoring will also be maintained in Appendix F.

P2 Plan, Potable Water System Discharges June 2017

Table 9-1. Petroleum ASTs

Building

Location Container

Type

Container Capacity (Gallons)

Material of Construction

Product Containment

Type

Storm Water

Release

APG-North

345 Steam Plant Single Wall, Vertical 300,000 Steel Fuel Oil

Concrete Berm (Secondary)

Manual

460 Generator Test Site

(2) AST,

Single Wall, Round

10,000 Steel JP-8 Steel Bottom (Secondary)

Manual

460 Generator Test Site Single Wall, Round 10,000

Steel Diesel Steel Bottom (Secondary)

Manual

507* Mulberry Point Rd Double Wall, Horizontal 15,000 Steel Fuel Oil

Concrete Berm (Tertiary)

N/A

Aberdeen Research

Laboratory Single Wall, Vertical 100,000 Steel Fuel Oil

Concrete Berm (Secondary)

Manual

Aberdeen Research

Laboratory Single Wall, Vertical 35,000 Steel Diesel

Concrete Berm (Secondary)

Manual

APG-South

E2901 MRICD

(4) ASTs, Double Wall, Horizontal

80,000 Steel Fuel Oil Concrete Berm

(Tertiary) Manual

E5127 Steam Plant

(2) ASTs, Single Wall, Vertical

600,000 Steel Fuel Oil Concrete Berm

(Secondary) Manual

*Waiver from tertiary containment requirement as the containment structure is not water tight.

P2 Plan, Potable Water System Discharges June 2017

Table 9-2. Monitoring and Effluent Limits for Discharges from Containment Structures

Parameter Quality or Concentration Frequency of

Analysis Sample Type

Daily Maximum Units

Oil & Grease1 15 mg/l 1/discharge grab

BTEX1,2 100 µg/l 1/discharge grab

Benzene1,2 22 µg/l 1/discharge grab

Notes:

Sampling for oil & grease shall continue once per discharge until there is no visible product on the water surface in the containment area and until at least three separate, consecutive discharge samples indicate compliance with the oil & grease limit.

Monitoring for BTEX (benzene, toluene, ethylbenzene, and xylene) and benzene required only if a spill or leak of gasoline has occurred in the containment area. Sampling for BTEX shall continue once per discharge until there is no visible product on the water surface in the containment area and until at least three separate, consecutive discharge samples indicate compliance with the BTEX effluent limit. The permittee shall include in the DMR the total BTEX and each individual concentration of benzene, toluene, ethylbenzene and xylene.

In addition to monitoring, APG will maintain the outlet from containment structures in the closed position at all times except during storm water drainage operations. APG will inspect containment areas at least once per month and maintain a logbook of observations, particularly noting any spills or leaks of petroleum products into containment areas. If a spill or leak occurs in a containment area, it will be removed as soon as possible. If no spill or leak has occurred, APG will, at a minimum, make a visual inspection of the standing water before discharging. All discharges from containment areas will not contain a visible oil sheen, floating solids, or persistent foam.

10.0 REFERENCES

General Permit for Discharges from Tanks, Pipes and Other Liquid Containment Structures at Facilities Other Than Oil Terminals, State NPDES Permit

No. MDG67, MDE, effective date 1 March 2012.

Spill Prevention, Control, and Countermeasure Plan, APG, Maryland, April 2017.

2011 Maryland Standards and Specifications for Soil Erosion and Sediment Control, Water Management Administration, MDE, December 2011.

P2 Plan, Potable Water System Discharges June 2017

A-1

Appendix A

NPDES Permit No. MDG67

MARYLAND DEPARTMENT OF THE ENVIRONMENT

1800 Washington Boulevard Baltimore Maryland 21230

(410) 537-3000 1-800-633-6101 http://www.mde.state.md.us

GENERAL PERMIT FOR DISCHARGES FROM

TANKS, PIPES and OTHER LIQUID CONTAINMENT STRUCTURES at FACILITIES OTHER THAN OIL TERMINALS

DISCHARGE PERMIT NO. 11-HT NPDES PERMIT NO. MDG67

Effective Date: March 1, 2012 Expiration Date: February 28, 2017

PART I. APPLICABILITY AND COVERAGE

A. GEOGRAPHIC COVERAGE

B. ELIGIBLE DISCHARGES

C. INELIGIBLE DISCHARGES

D. NO PERMIT REQUIRED

E. INDIVIDUAL PERMIT OR ANOTHER GENERAL PERMIT REQUIRED

F. TERMINATION OF PERMIT

G. AUTHORIZATION

H. TRANSFER OF AUTHORIZATION

I. CONTINUATION OF AN EXPIRED GENERAL PERMIT

J. CHANGE IN LOCATION

PART II. DEFINITIONS

PART III. CONDITIONS OF REGISTRATION

A. REQUESTS FOR REGISTRATION AND FEE REQUIREMENTS

B. DEADLINES FOR NOTIFICATION

C. REQUIRED SIGNATURES

D. FAILURE TO NOTIFY

E. CHANGE IN DISCHARGE

F. ADDITIONAL NOTIFICATION

PART IV. SPECIAL CONDITIONS OF DISCHARGES

A. NOTIFICATIONS

B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

1. Treated tank bottom wastewater from petroleum storage tanks to surface waters

2. Discharges from Disinfection and Hydrostatic Testing of Pipes, Pipelines, and Tanks and Mechanical Cleaning of Potable Water Pipes and Tanks

3. Wastewater from draining or flushing of fire control systems

4. Discharges from Potable Water Systems

5. Untreated “water” in excess of 10,000 gallons per day as a monthly average from water storage or distribution systems, including but not limited to hydrogeologic/aquifer/well head yield-testing

6. Storm Water Discharges from Aboveground Petroleum Storage Tank Containment Structures

PART V. MONITORING AND REPORTING

A. REPRESENTATIVE SAMPLING

B. SAMPLING AND ANALYTICAL METHODS

C. DATA RECORDING REQUIREMENTS

D. MONITORING EQUIPMENT MAINTENANCE

E. ADDITIONAL MONITORING BY PERMITTEE

F. REPORTING MONITORING RESULTS

G. RECORDS RETENTION

H. NONCOMPLIANCE WITH DISCHARGE LIMITS

PART VI. VIOLATION OF PERMIT CONDITIONS

A. COMPLIANCE WITH THIS GENERAL PERMIT AND WATER POLLUTION ABATEMENT STATUTES

B. CIVIL AND CRIMINAL LIABILITY

C. ACTION ON VIOLATIONS

D. CIVIL PENALTIES FOR VIOLATIONS OF PERMIT CONDITIONS

E. CRIMINAL PENALTIES FOR VIOLATIONS OF PERMIT CONDITIONS

F. PENALTIES FOR FALSIFICATION AND TAMPERING

PART VII. GENERAL CONDITIONS

A. RIGHT OF ENTRY

B. PROPERTY RIGHTS/COMPLIANCE WITH OTHER REQUIREMENTS

C. DUTY TO PROVIDE INFORMATION

D. BYPASSING

E. CONDITIONS NECESSARY FOR DEMONSTRATION OF AN UPSET

F. REMOVED SUBSTANCES

G. FACILITY OPERATION AND MAINTENANCE

H. POWER FAILURE

I. OTHER INFORMATION

J. AVAILABILITY OF REPORTS

K. TOXIC POLLUTANTS

L. OIL AND HAZARDOUS SUBSTANCES PROHIBITED

M. WATER CONSTRUCTION AND OBSTRUCTION

N. PROTECTION OF WATER QUALITY

O. PERMIT MODIFICATION

P. IMPAIRED RECEIVING WATERS AND TOTAL MAXIMUM DAILY LOADS

Q. TOTAL MAXIMUM DAILY LOAD (TMDL)

R. SEVERABILITY

PART VIII. AUTHORITY TO ISSUE GENERAL NPDES PERMIT S

MARYLAND GENERAL DISCHARGE PERMIT NO. 11HT (NPDES NO. MDG67) Page 3

Provides discharge authorization only upon Maryland Department of the Environment notification of registration.

PART I. APPLICABILITY AND COVERAGE

Pursuant to the provisions of Title 9 of the Environment Article, Annotated Code of Maryland, and the provisions of the Federal Clean Water Act (CWA), 33 U.S.C. §1251 et seq. and implementing regulations 40 CFR Parts 122, 123, 124, and 125, the Maryland Department of the Environment, hereinafter referred to as the “Department”, hereby authorizes operators located in the state of Maryland, who have submitted a notice of intent (NOI) and received written approval from the Department, to discharge wastewater from hydrostatic testing and related discharges described herein to waters of the state of Maryland in accordance with the eligibility requirements and other conditions set forth in this permit and consistent with the permittees’ NOI on file with the Department.

A. Geographic Coverage

This permit covers discharges to surface or groundwater located within the territorial boundaries of the state of Maryland.

B. Eligible Discharges

This permit covers the following discharges:

1. Treated tank bottom wastewater from petroleum (i.e., gasoline, kerosene, fuel oil, ‘Number 6 oil’ and aviation fuel only) storage tanks to surface waters;

2. Wastewater from the disinfection (only disinfection agents containing bromide or chloride are authorized) or hydrostatic testing of pipes, pipelines or tanks;

3. Wastewater from draining or flushing of fire control systems;

4. Discharges from potable water systems resulting from the overflow, flushing, disinfection, hydrostatic testing, mechanical cleaning, or dewatering of vessels or structures used to store or convey potable water;

5. Untreated “water” in excess of 10,000 gallons per day as a monthly average from water storage or distribution systems, including but not limited to hydrogeologic/aquifer/well head yield-testing;

and

6. Storm water discharges from petroleum storage tank containment structures.

C. Ineligible Discharges

The following discharges are not eligible for coverage under this general permit:

1. Discharges of any type from oil terminals;

2. Tank bottom wastewater discharges to groundwater of the state;

3. Wastewater from the chemical cleaning of storage tanks, pipes and pipelines; and

4. Wastewater discharges to groundwater that, before treatment, contain concentrations of benzene, lead, or other substances in excess of Toxicity Characteristic Leaching Procedures (TCLP) concentrations as defined in COMAR 26.13.02.14.

D. No Permit Required No discharge permit is required for the discharge of water from impoundments formed by the damming of natural drainage paths, or for the discharge of any untreated "waters" less than 10,000 gallons per day, as a monthly average.

MARYLAND GENERAL DISCHARGE PERMIT NO. 11HT (NPDES NO. MDG67) Page 4

Provides discharge authorization only upon Maryland Department of the Environment notification of registration.

E. Individual Permit or Another General Permit Require d

1. If the Department determines that a discharge may cause an in-stream exceedance of water quality standards, the Department may require additional actions, including an application for an individual permit.

2. The Department may require any person authorized by this permit to apply for and obtain an individual state or state/NPDES discharge permit or obtain coverage under another general permit. If an owner or operator fails to submit, in a timely manner, an application for the Department-required individual state or state/NPDES discharge permit or a Notice of Intent (NOI) for another general permit as established by this condition, the applicability of this permit to the owner or operator is automatically terminated. Effective at the end of such day that was specified by the Department for the application or NOI to be submitted this permit is terminated and the permittee’s continuance of discharges that are covered by this permit is no longer authorized.

3. Any person authorized by this permit may request to be excluded from coverage under this permit by applying for an individual state or state/NPDES discharge permit or requesting coverage under another general permit. The Department may grant this request by issuing an individual state or a state/NPDES discharge permit or by granting coverage under another general permit, if the reasons cited by the owner or operator are adequate to support the request.

4. When an individual state or state/NPDES discharge permit is issued to a person for discharges otherwise subject to this permit, the applicability of this permit to the permittee is automatically terminated on the effective date of the individual state or state/NPDES discharge permit.

5. If there is evidence indicating potential or realized impacts on water quality due to any activity covered by this permit, the owner or operator of the discharging facility may be required to obtain an individual state or a state/NPDES discharge permit or coverage under another general permit.

6. If a person otherwise covered under this permit is denied coverage under an individual state or a state/NPDES discharge permit, the denial automatically terminates on the date of the denial, the person's coverage under this general permit, unless otherwise specified by the Department.

7. The Department may process an NOI as an application for an individual permit if site specific conditions do not allow registration of the facility under the general permit without compromising water quality. Such circumstances may occur when a permittee proposes to discharge to impaired waters, with or without an existing Total Daily Maximum Load (TMDL), or for discharges to high quality waters.

F. Termination of Permit

1. The Department may terminate coverage under this general permit for an existing permittee if the Department finds that:

a. The NOI contained false or inaccurate information;

b. Conditions or requirements of the discharge permit have been or are about to be violated;

c. Substantial deviation from plans, specifications, or requirements has occurred;

d. The Department has been refused entry to the premises for the purpose of inspecting to insure compliance with the conditions of the discharge permit;

MARYLAND GENERAL DISCHARGE PERMIT NO. 11HT (NPDES NO. MDG67) Page 5

Provides discharge authorization only upon Maryland Department of the Environment notification of registration.

e. A change in conditions exists that requires temporary or permanent reduction or elimination of the permitted discharge;

f. Any state or federal water quality stream standard or effluent standard has been or is likely to be violated; or

g. Any other good cause exists for terminating coverage under this permit.

2. If the Department terminates permit coverage as a result of one of the conditions listed in

Section F-1 above, the permittee must apply for an individual permit immediately. The permittee must also cease any and all activities listed in PART I - Section B. until coverage is granted under an individual permit. If there are periods of discharge between the termination of the general permit and the effective date of the individual permit, the facility operator and owner are accountable for those discharges and any violations of state and federal law are subject to penalty as detailed in PART VI.

3. Any permittee not requesting termination of permit coverage remains responsible for meeting all permit requirements, including monitoring and reporting. A permittee should request permit termination by submitting a Notice of Termination (NOT) MDE/WMA/PER.005 form (http://www.mde.state.md.us/) if:

a. All discharges have permanently ceased.

b. For discharge of storm water from containment structures, all product has been permanently removed from storage tanks and all residual contamination in the containment structure has been removed.

G. Authorization

1. To be authorized to discharge under this general permit, a person is required to submit an NOI in accordance with the requirements of PART III of this permit, pay the required fee, receive notification from the Department of registration and comply with the terms and conditions of this permit. Coverage under this permit is effective on the date that the NOI is accepted by the Department, provided the NOI fee has been paid to the Department in accordance with the terms stipulated in PART III below. A person who submits such an NOI, is notified of its acceptance by the Department, complies with the terms and conditions of this permit, and pays the required fee, is authorized to discharge under the terms and conditions of this general permit.

2. If the NOI fee is paid by check which does not clear for any reason, the applicant will be given

30 calendar days to make proper payment, including any interest and other charges. If payment is not received by the 31st calendar day, coverage under this permit shall be considered void from the outset. The permittee should save the cancelled check, a copy of the completed NOI, and the registration letter from the Department. These documents shall be provided to the Department upon request.

H. Transfer of Authorization

1. The authorization under this permit is not transferable to cover a change in facility location.

2. The authorization under this permit is not transferable to any person except in accordance with this section.

MARYLAND GENERAL DISCHARGE PERMIT NO. 11HT (NPDES NO. MDG67) Page 6

Provides discharge authorization only upon Maryland Department of the Environment notification of registration.

3. Authorization to discharge under this permit may be transferred to another person if:

a. The current permittee notifies the Department’s Wastewater Permits Program in writing of the proposed transfer along with the submittal of form MDE/WMA/PER.079 (http://www.mde.state.md.us/);

b. A written agreement, indicating the specific date of the proposed transfer of permit coverage and acknowledging the responsibilities of the current and new permittee for compliance with and liability for the terms and conditions of this permit, is submitted to the Department;

c. The new permittee either confirms in writing that the type of discharge, number of outfalls, and other information given on the original NOI remain correct or submits a modified NOI;

and

d. Neither the current permittee nor the new permittee receives notification from the

Department, within 30 days of receipt of items a through c above, of intent to terminate coverage under this permit.

4. The Department may continue coverage for the new permittee under this permit or may require the new permittee to apply for and obtain an individual state or state/NPDES discharge permit.

5. The new permittee is responsible for any permit fees unpaid by the former permittee.

I. Continuation of an Expired General Permit

The terms and conditions of this permit and authorized permit registrations are automatically continued and remain fully effective and enforceable upon expiration of this permit until the date(s) specified under a reissued general permit unless the permit or authorization is revoked or terminated by the Department.

J. Change in Location Registration under this permit is specific to a geographic location. If an operation moves, the permittee must submit a Notice of Termination (NOT) MDE/WMA/PER.005 form (http://www.mde.state.md.us/) as stated in Section F, above. They must also apply for coverage at the new location by submitting a new NOI.

PART II. DEFINITIONS

A. "Bypass" means the intentional diversion of wastes from any portion of a treatment facility.

B. "CFR" means Code of Federal Regulations.

C. "COMAR" means Code of Maryland Regulations.

D. “Daily determination of concentration ” means one analysis performed on any given sample representing flow during a calendar day, with one number in mg/L or other appropriate units as an outcome.

E. “Daily maximum” effluent concentration means the highest reading of any daily determination of concentration.

F. "Department " means the Maryland Department of the Environment.

MARYLAND GENERAL DISCHARGE PERMIT NO. 11HT (NPDES NO. MDG67) Page 7

Provides discharge authorization only upon Maryland Department of the Environment notification of registration.

G. "Discharge" means:

1. The addition, introduction, leaking, spilling, or emitting of any pollutant to waters of this state; or

2. The placing of a pollutant in a location where the pollutant is likely to pollute.

H. "Disinfectant " means any oxidant, including but not limited to chlorine, chlorine dioxide, chloramines, and ozone, added to the water in any part of the treatment or distribution process, that is intended to inactivate pathogenic microorganisms. For the purposes of this permit, this shall be identified as a post washing activity.

I. "Estimated flow” means a calculated volume or discharge rate that is based on a technical evaluation of the sources contributing to the discharge including, but not limited to, pump capabilities, water meters, and batch discharge volumes.

J. "Federal Clean Water Act" (CWA) means the Federal Water Pollution Control Act Amendments of 1972, its amendments and all rules and regulations adopted there under.

K. "Flushing" means the rinsing of pipes, tanks, or reservoirs with untreated “water” or with potable water to remove solids that have accumulated during construction or from settling. Flushing does not include any introduction of cleaners or chemicals into the pipes or tanks.

L. "General permit" means a discharge permit issued for a class of dischargers.

M. "Grab sample" means an individual sample collected over a period of time not exceeding 15 minutes. Grab samples collected for pH and total residual chlorine shall be analyzed within 15 minutes of time of sample collection.

N. "Groundwater" means underground water in a zone of saturation.

O. "Impaired water" means water whose quality does not meet its designated use(s). For purposes of this permit ‘impaired’ refers to threatened and impaired waters:

1. For which TMDLs have been established,

2. For which existing controls such as permits are expected to resolve the impairment, or

3. For which a TMDL is required.

Impaired waters compilations are also sometimes referred to as 303(d) lists, and are included in Maryland’s most current List of Impaired Surface Waters [as Category 4 or 5] (http://www.mde.maryland.gov/Programs/WaterPrograms/TMDL).

P. "Includes" or "including" means includes or including by way of illustration and not by way of limitation.

Q. "NPDES permit" means a National Pollutant Discharge Elimination System permit issued under the Federal Clean Water Act.

R. "NOI" means Notice of Intent to be covered by this permit (see PART III of this permit).

S. “Oil and grease ” refers to the use of and results yielded from EPA Method 1664 (or any EPA approved revisions of this analytical test method approved for use with Federal Clean Water Act monitoring programs).

T. “Oil terminal" means a facility that is principally engaged in the storage and transfer of petroleum products.

U. "Operator" means that person or those persons with responsibility for the management and performance of each facility.

V. “Outfall ” means the permit authorized wastewater discharge location

MARYLAND GENERAL DISCHARGE PERMIT NO. 11HT (NPDES NO. MDG67) Page 8

Provides discharge authorization only upon Maryland Department of the Environment notification of registration.

W. "Permittee" means the person holding a permit issued by the Department and authorized to discharge under the provisions of this general permit.

X. “Persistent Foam” means foam that does not dissipate within one half-hour of point of discharge and: forms objectionable deposits on the receiving water; forms floating masses producing a nuisance; produces objectionable color or odor; or interferes with a designated use of the water body. It does not mean foaming of the receiving water body caused by natural conditions.

Y. "Person" means an individual, receiver, trustee, guardian, personal representative, fiduciary, or representative of any kind, and any partnership, firm, association, corporation, or other entity.

Person includes the federal government, this state, any county, Municipal Corporation or other political subdivision of this state or any of their units.

Z. “Pollution Prevention Plan (PPP)” means a plan for diverting, detaining, treating and/or otherwise controlling discharges of potable water through physical, chemical or other means such as employee training, minimizing response time, and strategic maintenance planning to minimize the introduction of pollutants into ground or surface waters.

AA. "Potable water" means water that is free from impurities in amounts sufficient to cause disease or harmful physiological effects and which conforms with COMAR 26.04.01 Quality of Drinking Water in Maryland. For this permit, it also refers to drinking water that has been chemically treated.

BB. "Sewage" means water-carried human, domestic and other wastes and includes all human and animal excreta from residences, buildings, industrial establishments, or other places.

CC. "State discharge permit" means the discharge permit issued under the Environment Article, Title 9, Subtitle 3, Annotated Code of Maryland.

DD. "Storm water" means that portion of precipitation, including snow melt runoff, that, once having fallen to the ground, is in excess of the evaporative or infiltrative capacity of soils, and the retentive capacity of surface features, which flows or will flow off the land by surface runoff to waters of the state.

EE. “Super chlorination” means the addition of chlorine resulting in levels exceeding four parts per million (4ppm)

FF. "Surface waters" means all waters of this state that are not groundwaters.

GG. "Tank bottom" means wastewater and attendant sludge that separates from the petroleum or other chemical contents of a storage tank and collects at the bottom or top of the tank.

HH. “Territorial boundaries” means both land and waters of the state.

II. “Total Maximum Daily Load (TMDL)” means a calculation of the maximum amount of a pollutant that a water body can receive and still meet water quality standards, and an allocation of that amount to the pollutant's sources.

JJ. "Upset" means an exceptional incident in which there is unintentional and temporary noncompliance with technology-based permit effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation.

KK. "Wastewater" means any:

1. Liquid waste substance derived from industrial, commercial, municipal, residential, agricultural, recreational, or other operations or establishments; and

2. Other liquid waste substance containing liquid, gaseous or solid matter and having characteristics that will pollute any waters of the state.

MARYLAND GENERAL DISCHARGE PERMIT NO. 11HT (NPDES NO. MDG67) Page 9

Provides discharge authorization only upon Maryland Department of the Environment notification of registration.

LL. “Water” means the liquid substance which is derived from a groundwater source, a surface water source, or any combination of these sources, and which will be discharged, without change in quality, into waters of this state, with the exception of storm water runoff.

MM. "Waters of the state" includes:

1. Both surface and underground waters within the boundaries of this state subject to its jurisdiction, including that part of the Atlantic Ocean within the boundaries of this state, the Chesapeake Bay and its tributaries, and all ponds, lakes, rivers, streams, tidal and nontidal wetlands, public ditches, tax ditches, and public drainage systems within this state, other than those designed and used to collect, convey, or dispose of sanitary sewage; and

2. The flood plain of free-flowing waters determined by the Department of Natural Resources on the basis of the 100-year flood frequency.

NN. “Water Quality Standard” means such measures of purity or quality for any waters in relation to their reasonable and necessary use as promulgated in COMAR 26.08.02 (http://www.dsd.state.md.us/comar/).

PART III. CONDITIONS of REGISTRATION

A. Requests for Registration and Fee Requirements

1. Notice of Intent (NOI)

a. Applicants shall complete all required information on this permit’s corresponding NOI Form

MDE-WMA-PER011 (http://www.mde.state.md.us), including: permittee name, address, electronic-mail (email) address, and telephone number; facility location including address and latitude and longitude; any preexisting NPDES permit number; receiving water body(s) for each outfall/discharge, and discharge type and flow (expressed as gallons per day) for each outfall (or discharge location). Identify the material for which the pipe, pipeline or tank will or has been used to store or convey. Detailed instructions on how to complete the NOI are located on the back of the form. The current fees in effect are included on the NOI instructions.

A site map shall be included with the NOI identifying discharge locations. The map should provide significant points of reference (i.e., road, building etc.) near the discharge location and must identify all surface waters within a quarter mile of the discharge point. For publicly owned potable water systems, a map of the entire system bounded by the community shall be provided and identify major discharge points (e.g., storage tanks, wells, etc.). All discharge locations shall correspond to those identified on the NOI.

A latitude and longitude must be provided for each discharge point. All locations are to be provided in North American Datum (NAD83), Geographic Projection of Latitude/Longitude in Decimal Degrees.

2. Permit Fee

a. Persons who intend to obtain coverage under this general permit shall submit an initial permit fee to the Department with the NOI form, and an annual fee each year thereafter per

COMAR 26.08.04.09-1 (G).

MARYLAND GENERAL DISCHARGE PERMIT NO. 11HT (NPDES NO. MDG67) Page 10

Provides discharge authorization only upon Maryland Department of the Environment notification of registration.

b. The initial fee requirement as indicated in the NOI instructions shall be made payable to the

Maryland Department of the Environment and sent together with the completed NOI and site map to:

Maryland Department of the Environment

P.O. Box 2057 Baltimore, MD 21203-2057

c. The Department will bill the permittee annually, and the fee shall be paid by the anniversary date of the effective date of the permit each year after the first.

B. Deadlines for Notification

1. New Discharges

At least 60 days prior to the commencement of any new discharge covered under this general permit, a person shall request coverage by submitting a NOI in accordance with the requirements of this PART.

2. Renewals of…