PC SP O

Wastewater Facility

Operation & Maintenance Manual

Port Crescent State Park Huron County, Michigan

1775 Port Austin Road, Port Austin, Michigan 48467

Prepared by:

Capital Consultants, Inc.

725 Prudden Street Lansing, MI 48906 www.capitalconsultants.us

JULY 2005

03223 TOC-1 JULY 2005

TABLE OF CONTENTS

REGULATORY REQUIREMENTS/PERMITTING

Discharge Permit ................................................................................................ Regulations-1

CHAPTER 1 - INTRODUCTION

1.1 INTRODUCTION ....................................................................................................... 1-1

1.2 MANUAL USER GUIDE ............................................................................................ 1-1

1.3 INSTITUTIONAL RESPONSIBILITIES ...................................................................... 1-4

CHAPTER 2 - WASTEWATER TREATMENT PROCESS DESCRIPTION

2.1 OPERATION AND MAINTENANCE RESPONSIBILITIES ........................................ 2-1

2.2 TREATMENT PROCESS AND PERFORMANCE REQUIREMENTS ....................... 2-3

2.3 BASIS OF DESIGN ................................................................................................... 2-6

CHAPTER 3 - OPERATIONAL REFERENCES

3.1 OPERATIONAL REFERENCES ................................................................................ 3-1

CHAPTER 4 - DESCRIPTION, OPERATION AND CONTROL OF FACILITIES

4.1 BASIC OPERATION OF THE WASTEWATER FACILITIES ..................................... 4-1

4.2 CONTROL BUILDING COMPONENTS .................................................................... 4-7

4.3 ELECTRICAL SERVICE AND ELECTRICAL DISTRIBUTION SYSTEM .................. 4-7

4.4 PLUMBING ................................................................................................................ 4-7

4.5 CONTROL BUILDING VENTILATION SYSTEM ....................................................... 4-9

4.6 COMMINUTION/GRINDER ....................................................................................... 4-9

4.7 RAW SEWAGE FLOW MEASUREMENT ............................................................... 4-10

4.8 AERATION SYSTEM .............................................................................................. 4-10

4.9 CONTROL PANELS ................................................................................................ 4-12

4.10 FACULTATIVE LAGOONS ..................................................................................... 4-13

4.11 LAGOON OPERATION ........................................................................................... 4-14

4.12 LAGOON OUTLET STRUCTURE ........................................................................... 4-15

4.13 FLOW MEASUREMENT STRUCTURE .................................................................. 4-16

4.14 LAGOON MAINTENANCE ...................................................................................... 4-16

4.15 REFERENCES ........................................................................................................ 4-22

CHAPTER 5 - RECORD KEEPING

5.1 LIMITATIONS AND MONITORING REQUIREMENTS ............................................. 5-1

5.2 MONITORING PROCEDURES ................................................................................. 5-7

5.3 REPORTING REQUIREMENTS ............................................................................... 5-8

CHAPTER 6 - MAINTENANCE

6.1 MAINTENANCE PROGRAM OBJECTIVES .............................................................. 6-1

6.2 GENERAL HOUSEKEEPING .................................................................................... 6-2

6.3 PROCESS STRUCTURES AND EQUIPMENT ........................................................ 6-2

CHAPTER 7 - SAFETY

7.1 GENERAL

7.1.1 Introduction ................................................................................................................ 7-1

03223 TOC-2 JULY 2005

7.1.2 Safety Program .......................................................................................................... 7-1

7.1.3 Responsibility ............................................................................................................ 7-2

7.1.4 Safety Awareness ...................................................................................................... 7-2

7.1.5 Medical ...................................................................................................................... 7-2

7.1.6 New Employees ......................................................................................................... 7-2

7.1.7 Reports ...................................................................................................................... 7-3

7.1.8 Motor Vehicle Safety ................................................................................................. 7-3

7.1.9 Sources of Safety Hazards ........................................................................................ 7-3

7.2 GENERAL SAFETY SUGGESTIONS

7.2.1 Read the Instructions ................................................................................................. 7-4

7.2.2 Housekeeping ............................................................................................................ 7-4

7.2.3 Personnel Protective Equipment ............................................................................... 7-4

7.2.4 Lighting ...................................................................................................................... 7-5

7.2.5 Warning Signs ........................................................................................................... 7-5

7.2.6 Lifting and Handling Objects ...................................................................................... 7-5

7.2.7 Falls ........................................................................................................................... 7-6

7.2.8 Tools and Ladders ..................................................................................................... 7-6

7.2.9 Painting ...................................................................................................................... 7-6

7.3 HAZARDS

7.3.1 Sewer Hazards .......................................................................................................... 7-7

7.3.2 Health Hazards and Infectious Disease .................................................................... 7-7

7.3.3 Oxygen Deficient and Toxic Atmosphere Hazards .................................................... 7-8

7.3.4 Explosion Hazards ................................................................................................... 7-10

7.3.5 Fire Hazards ............................................................................................................ 7-11

7.3.6 Electrical Hazards .................................................................................................... 7-11

7.3.7 Mechanical Hazards ................................................................................................ 7-12

7.3.8 Weed Control Chemical Hazards ............................................................................ 7-12

7.3.9 Noise ....................................................................................................................... 7-13

7.4 FIRST AID

7.4.1 General .................................................................................................................... 7-14

7.4.2 What to do in Case of an Accident .......................................................................... 7-14

7.4.3 Shock ....................................................................................................................... 7-15

7.4.4 Open Wounds .......................................................................................................... 7-16

7.4.5 Bone and Joint Injuries ............................................................................................ 7-17

7.4.6 Poisoning ................................................................................................................. 7-18

7.4.7 Chemical Burns ....................................................................................................... 7-19

7.4.8 Consulting Physician ............................................................................................... 7-20

7.5 SAFETY EQUIPMENT ............................................................................................... 7-20

7.6 SAFETY REFERENCES ............................................................................................ 7-22

GLOSSARY

APPENDIX A - LIST OF CONTRACTORS, VENDORS, AND EQUIPMENT SUPPLIERS

APPENDIX B - LIST OF AS-BUILT DRAWINGS

03223 TOC-3 JULY 2005

List of Figures

Figure No. Title

Page

1.1 Park Location Map 1-3

2.1 Site Map 2-4

2.2 Facility Schematic and Hydraulic Profile 2-5

4.1 Aeration / Dosing Tank Piping Plan 4-2

4.2 Control Building Plan 4-3

4.3 Control Building Sections 4-4

4.4 Control Building Circuit Panel Schematic and Electrical

One Line Diagram 4-8

4.5 Facultative Lagoon Process 4-14

List of Tables

Table No. Title

Page

2.1 Operation and Managerial Responsibilities 2-2

4.1 Port Crescent Facultative Lagoon Design Details 4-13

4.2 Lagoon Water Color 4-21

5.1 Flow Meter Readings 5-2

5.2 Campground Operations and Maintenance Checklist 5-3

5.3 Discharge Monitoring Report 5-4

5.4 Electric Meter Readings 5-5

5.5 Pump Station Preventive Maintenance Check List 5-6

6.1 Maintenance Requirements 6-4

6.2 Problem Analysis (Sheet 1 of 2) 6-4

REGULATORY REQUIREMENTS/PERMITTING

03223 REGULATIONS-1 JULY 2005

Regulatory Requirements/Permitting O & M Manual for Wastewater Facility, Port Crescent State Park

Discharge Permit

A discharge permit required is required to comply with State and Federal rules to discharge to the waters of the State of Michigan.

Port Crescent State Park is authorized through MDEQ Surface Water Division as

Authorized by Michigan Act 451, Public Acts of 1994, as amended, Part 31.

Port Crescent State Park is operating under General Permit No. MIG589000 and

Certificate of Coverage No. MIG580352. The certificate authorizes the discharge of 2.6 million gallons per year, seasonally, to the Ahearn Drain. The Drain is situated to the north of the existing lagoons and discharges to Lake Huron. Copies of the existing Certificate of Coverage and general discharge permit are enclosed in this section.

Since the permit can be revoked or not renewed, the permit should be kept up-to-date and renewal applications should be submitted in a timely manner. The best way to find the program is to go to the MDEQ “Programs” tab and search the list for Environmental Science and

Services (ESS) and then MDEQ Operator Training & Certification Unit. Most of the information needed for permitting is found under the WATER BUREAU “Surface Water” program.

Website: http://www.michigan.gov/deq/

Operator Training and Certification with Staff Contact List

Eric Way, Program Manager Vanessa Birdsong, Secretary, 517-241-7199

Wastewater Staff:

Doug Hill, 517-373-4754 Dan Holmquist, 517-373-4753 Bruce Lack, 517-373-4755

The MDEQ staff change periodically and should be kept updated in the following table.

New contact Person/Title Phone # Date Updated Audrey Schwing – Environmental

Quality Analyst 989-590-0662 2/18/2021

Alyssa Sarver – EQA 517-881-1371 2/19/2021 Earl Wuestnick – Environmental Quality

Specialist 517-881-0797 2/19/2021

CHAPTER 1

INTRODUCTION

1.1 INTRODUCTION ....................................................................................................... 1-1

1.2 MANUAL USER GUIDE ............................................................................................ 1-1

1.3 INSTITUTIONAL RESPONSIBILITIES ...................................................................... 1-4

03223 1-1 July 2005

Introduction

1.1 INTRODUCTION

Port Crescent State Park is located approximately five miles southwest of Port Austin, on

Lake Huron. The park encompasses 640 acres of land that includes 137 campsites, 2-toilet/shower buildings, one (1) contact station, one (1) sanitation station and a day-use area that includes a restroom, picnic areas, and one (1) contact station. A park location map is provided on page 1-3. Of these facilities, the campground’s two toilet/shower buildings, the campground contact station and the sanitation station discharge to an existing wastewater system and are in operation from April through October each year. The central wastewater treatment facility was constructed in 2003.

Wastewater from the day-use area is collected and treated by septic tanks, vault toilets, and/or drain fields. The wastewater from park vault toilets is disposed of off-site by licensed waste disposal contractors.

In 2000, the Michigan Department of Environmental Quality (MDEQ) issued Surface

Water Discharge Permit No. MIG589000 and Certificate of Coverage No. MIG5890352, allowing the discharge of up to 2.6 million gallons per year of treated sanitary sewage seasonally to the Ahearn Drain. The Drain is situated to the north of the existing lagoons and discharges to Lake Huron.

1.2 MANUAL USER GUIDE

The contents of this manual are intended to familiarize operating personnel with the design concepts and operating and maintenance aspects of the wastewater facility. As experience is gained in the operation of the facilities, the manual is intended as a quick reference guide and should be continuously updated to reflect input derived from operation. As employees are assigned to the operating staff, one of their first duties should be to review this

Operation and Maintenance Manual. It is also recommended to provide annual training sessions for operation of the wastewater system.

The manual is divided into seven chapters having the following headings:

Chapter 1 - Introduction Chapter 2 - Wastewater Treatment Process Description Chapter 3 - Operational References Chapter 4 - Description, Operation, and Control Facilities Chapter 5 - Record Keeping Chapter 6 - Maintenance Program Chapter 7 - Safety Program

03223 1-2 July 2005

It is particularly important to review Chapter 4. Chapter 4 contains detailed, site-specific discussions of operation and control of the wastewater processes. Note that Chapter 6 contains summaries of equipment maintenance and links to the Manufacturer’s operation and maintenance manuals.

Major sections for each chapter are listed in the Table of Contents and a detailed listing of the subjects discussed in each chapter is provided on the title sheet for each chapter.

Appendices are provided at the end of the manual. Appendix A contains items such as the list of contacts for the various process equipment, electrical and instrumentation. A complete set of the record drawings are contained in Appendix B.

This Operation and Maintenance Manual is available for viewing from Microsoft Word.

The electronic copy of the operation and maintenance manual is named:

Port Crescent Operation and Maintenance Manual.doc.

The Chapters of the document, List of Figures and List of Tables are hyper-linked from the

Table of Contents. Within each chapter, the user can link to the figures simply by clicking on the figure referenced; the figure is viewed in Adobe Acrobat. The Adobe Acrobat version shall be

7.01 version or newer. Free upgrades for this software an be obtained from this link:

http://www.adobe.com/products/acrobat/readstep2.html

Electronic copies of the Microsoft Word “Document Improvement Form” and “Document

Improvement Instructions” are available for making changes to this operation and maintenance manual. The procedures contained in these documents should be followed to make permanent changes to the master operation and maintenance manual.

Readers of the manual are advised that other sources of information are available for use in operation and maintenance of the facility. First are the contract documents, consisting of construction drawings and specifications, which were prepared for the upgraded facility.

Specifications are hardcopy only and are not included as part of the operation and maintenance manual. Second are the files of shop drawings and equipment operation manuals, which were provided during construction and are listed in the Manufacturers Reference Schedule attached in Appendix A of this manual. This manual should be kept together with these other references.

Many references are noted in the text of this manual and a selected number of these references should be obtained to form the nucleus of an operational library. The reader should also have access to an up-to-date copy of the discharge permit.

03223 1-4 July 2005

1.3 INSTITUTIONAL RESPONSIBILITIES

The Department of Natural Resources, Parks and Recreation Division is responsible for the operation of the collection and treatment system within the Park limits. The principal concern of those responsible for operation of the facility is the protection of the public health, safety, and welfare. To meet this objective, emphasis should be placed on maintaining the utility system in a condition that minimizes the loss of service, maximizes the treatment efficiency, and provides for the safe disposal of treatment process residues. Staffing of the facility with adequately trained operating and maintenance personnel who are dedicated to excellence in the performance of their duties is the basic ingredient to the protection of public health, safety, and welfare.

Both the construction and operating funds represent a large public commitment to the pollution control effort and those charged with the responsibility for operation have a duty to protect the public investment. This will require the implementation of efficient budgetary controls and the development of operation and maintenance procedures designed to maximize the service life for the components of the facility.

CHAPTER 2

WASTEWATER TREATMENT PROCESS DESCRIPTION

2.1 OPERATION AND MAINTENANCE RESPONSIBILITIES ........................................ 2-1

2.2 TREATMENT PROCESS AND PERFORMANCE REQUIREMENTS ....................... 2-3

2.3 BASIS OF DESIGN ................................................................................................... 2-6

03223 2-1 JULY 2005

Wastewater Treatment Process Description

2.1 OPERATION AND MAINTENANCE RESPONSIBILITIES

The objective of operating the wastewater facility is to maintain an efficient and economical collection system and treatment works in a manner, which insures uninterrupted service. The goal is to protect the public health, safety, and welfare. The wastewater system operation chain-of-command is outlined in the following organizational chart. Table 2.1 outlines the responsibilities for the Recreation Program Coordinator, Park Supervisor, and operation/maintenance personnel, respectively.

WASTEWATER SYSTEM OPERATION CHAIN-OF-COMMAND

PRD DIVISION SAFETY OFFICER

VACANT

PARK SUPERVISOR

BRIAN DUNN

PHONE: 989-738-8663

OPERATION/MAINTENANCE PERSONNEL

PARK RANGERS

Elizabeth Wegener Phone: 989-293-4510

03223 2-2 JULY 2005

Table 2.1 OPERATION AND MANAGERIAL RESPONSIBILITIES

RECREATION PROGRAM COORDINATOR RESPONSIBILITIES

1. Assist supervisors in preparing permit applications and updating permits in a timely manner.

2. Know operator training/certification requirements.

3. Know proper operating procedure.

PARK SUPERVISOR RESPONSIBILITIES

1. Operate the treatment system effectively.

2. Keep continuously informed of the best operating and maintenance practices.

3. Participate in short courses and schools when available.

4. Subscribe to and regularly read periodicals related to municipal wastewater treatment.

5. Maintain accurate and neat system operational and maintenance records.

6. Use sound judgment in the expenditure of operating funds.

7. Keep the Program Coordinator advised of potential major problems in operation and maintenance of the system.

8. Be aware of safety hazards associated with wastewater treatment.

9. Be prepared to discuss plant operation with plant visitors.

10. Ensure that the equipment is properly maintained.

11.

12. Maintain adequate treatment system operational and management records.

13. Provide good working conditions, safety equipment and proper tools for the operational personnel.

14. Establish a harmonious relationship with operational personnel.

15. Make employees aware of importance of proper plant performance.

16. Make periodic inspections of the treatment system to discuss mutual problems with the operational personnel and to observe operational practices.

17. Maintain good public relations.

OPERATION AND MAINTENANCE PERSONEL

1. Keep the Park Supervisor advised of potential major problems in operation and maintenance of the system.

2. Participate in short courses and schools when available.

3. Subscribe to and regularly read periodicals related to municipal wastewater treatment.

4. Be aware of safety hazards associated with wastewater treatment.

5. Ensure that the equipment is properly maintained.

03223 2-3 JULY 2005

2.2 TREATMENT PROCESS AND PERFORMANCE REQUIREMENTS

The park collection sewer system empties to the submersible pump station located adjacent to the campground. Raw sewage from the pump station is then pumped to the wastewater treatment facility; refer to Figure 2.1. Raw sewage travels via a 4-inch diameter cement asbestos force main and discharges to 4-inch diameter ductile iron force main at the treatment site. Flow then enters an in-line comminutor, or grinder, inside the Control Building. The comminutor, or grinder, is a device that grinds up large solids in the raw sewage to make it pass more easily through the rest of the treatment processes. Figure 2.2 shows a schematic unit process diagram for the treatment facility.

Following the grinder, the sewage passes through raw sewage flow measurement device before entering the aeration tank. This device is a magnetic flow meter that measures the flow rate through the influent pipe and the total volume of flow that has passed through the pipe.

After the sewage passes through the magnetic flow meter, the sewage continues to the aeration tank. The sewage is accumulated, mixed, and treated in the tank with air that is injected into the sewage through diffusers in the bottom of the tank. These diffusers are attached to the air supply piping which is fastened to the concrete tank base slab.

Two positive displacement blowers, located in the Control Building, compress air and discharge to the air supply piping for mixing and treatment of the sewage. The dissolved oxygen provided by the blowers provides both the energy for the treatment process to occur and helps to minimize odors. The air bubbles provide mixing as they rise through the sewage in the tank. This will keep most of the solids in the sewage suspended within the tank contents and help prevent accumulation of solids in the bottom of the tank.

Once the aeration tank is filled, the sewage overflows by gravity to two (2) facultative lagoons. The treated sewage is seasonally discharged to the Ahearn Drain. Refer to Figure 2.2.

Performance requirements for the treatment plant are outlined in the Regulatory

Requirements/Permitting Section.

03223 2-6 JULY 2005

2.3 BASIS OF DESIGN

Current regulations and standards of design as issued by the U.S. Environmental

Protection Agency, the Michigan Water Resource Commission, and the “Great Lakes-Upper

Mississippi River Board of State Sanitary Engineers” (Ten States Standards), are used as design guidelines.

The treatment plant design also includes the flexibility for expansion to double the plant design flow at some time in the future without major interruption of the proposed plant.

The following is the Basis of Design for the Port Crescent State Park Wastewater

Treatment Facility.

03223 2-7 JULY 2005

PORT CRESCENT STATE PARK

WASTEWATER TREATMENT FACILITY

Basis of Design

FACILITY: Port Crescent State Park, Huron County, Michigan Location: 1775 Port Austin Road, Port Austin, Michigan 48467

Type of Discharge: Surface Water Last Upgrade: Completed in 1984

SERVICE AREA:

Campsites: 137 @ 75 gallons per day Sanitation Station: 1 @ 4110 gallons per max day Contact Station: 1 @ 30 gallons per day Dates of Operation: April through October

DESIGN FLOWS:

Daily Maximum: 15,415 gallons Annual Daily Average: 5,890 gallons

DESIGN WASTELOAD

Maximum Daily BOD5: 93 lbs/day

AERATION TANK:

Number: 1 Capacity: 202,300 gallons Diameter: 45 feet Side Water Depth: 17 feet Freeboard: 2 feet

LAGOONS:

Number: 2 Area: 1.2 acres @ Mid-depth Water Depth: 6 feet Working Depth 4 feet

Volume: 1,570,000 gallons

AERATION EQUIPMENT:

Type: Coarse Bubble Diffusers Blowers: Two (2) – positive displacement @ 205 scfm ea.

CHAPTER 3

OPERATIONAL REFERENCES

3.1 OPERATIONAL REFERENCES ................................................................................ 3-1

03223 3-1 JULY 2005

Operational References

3.1 OPERATIONAL REFERENCES

This Operation and Maintenance Manual is specifically designed for the Port Crescent

State Park Wastewater Treatment Facility and is intended to outline the general overall operational requirements as well as providing sufficient details to convey the design concept.

However, this manual should not be regarded as the sole source of information regarding plant operations. Numerous other references are available, and a cross section of these references should be retained as a reference library. The following is a suggested partial listing of texts, periodicals, and other publications, which are available:

1. Standard Methods for the Examination of Water and Wastewater, published jointly by The American Public Health Association, The American Water Works Association and The Water Environment Federation.

2. Water Supply and Sewerage, by E.W. Steel, published by McGraw-Hill Book Company, Inc.

3. Wastewater Engineering, by Metcalf and Eddy, Inc., published by McGraw-Hill Book Company, Inc.

4. Water Environment Federation Publications:

a. No. 1 Safety and Health in Wastewater Systems; Order No: MO2001; ISBN: 1- 881369-87-0 Water Environment Federation, 2000,

b. No. 5 Air Diffusion in Sewage Works

c. No. 8 Sewage Treatment Plant Design

d. No. 11 Operation of Wastewater Treatment Plants; WEF Order No: M05110; ISBN:

1-57278-040-1

e. No. 12 Public Relations for Water Pollution Control

f. FD-16 Natural Systems for Wastewater Treatment,

g. No. 17 Paints and Protective Coating for Wastewater Treatment Facilities

h. No. 18 Simplified Laboratory Procedures for Wastewater Examination

5. Also, Reference the Water Environment Federation Website for many other publications, journals and training courses. @ http://www.wef.org/

6. Water Environment Federation:

601 Wythe Street, Alexandria, VA, 22314-1994 USA, Tel: 1-800-666-0206 (U.S. and Canada) Tel: 1-703-684-2452 (Outside the U.S. and Canada) Fax: 1-703-684-2492.

In addition to these sources, other sources of information are noted throughout this

03223 3-2 JULY 2005

manual, which may be desirable for the plant library. Operating personnel should also consult the operation and maintenance instructions provided with the plant equipment, the plans, and specifications for construction of the upgraded facilities, construction records, and past operational records for further input as to operational requirements.

CHAPTER 4

DESCRIPTION, OPERATION AND CONTROL OF FACILITIES

4.1 BASIC OPERATION OF THE WASTEWATER FACILITIES ..................................... 4-1

4.2 CONTROL BUILDING COMPONENTS .................................................................... 4-7

4.3 ELECTRICAL SERVICE AND ELECTRICAL DISTRIBUTION SYSTEM .................. 4-7

4.4 PLUMBING ................................................................................................................ 4-7

4.5 CONTROL BUILDING VENTILATION SYSTEM ....................................................... 4-9

4.6 COMMINUTION/GRINDER ....................................................................................... 4-9

4.7 RAW SEWAGE FLOW MEASUREMENT ............................................................... 4-10

4.8 AERATION SYSTEM .............................................................................................. 4-10

4.9 CONTROL PANELS ................................................................................................ 4-12

4.10 FACULTATIVE LAGOONS ..................................................................................... 4-13

4.11 LAGOON OPERATION ........................................................................................... 4-14

4.12 LAGOON OUTLET STRUCTURE ........................................................................... 4-15

4.13 FLOW MEASUREMENT STRUCTURE .................................................................. 4-16

4.14 LAGOON MAINTENANCE ...................................................................................... 4-16

4.15 REFERENCES ........................................................................................................ 4-22

03223 4-1 JULY 2005

Description, Operation and Control of Facilities O & M Manual for Wastewater Facilities, Port Crescent State Park

4.1 BASIC OPERATION OF THE WASTEWATER FACILITIES

Beginning of Season – Aeration Tank Empty

1) Close all drain valves allowing wastewater to begin filling the aeration tank. Drain valves are Valve Nos. P1 and P2; refer to Figure 4.1.

2) Remove protective box and heat source from flowmeter. If flowmeter is off, turn on circuit breaker for magmeter.

3) The cam lock tank connection valve P5, on the side of the tank, should also be closed and locked.

4) Start the inline sewage grinder and run continuously during facility operation.

5) Make sure grinder isolation valves P15 and P16 are open and grinder bypass valve P14 is closed. Refer to Figure 4.2.

6) Allow the wastewater to fill the aeration tank until the water level is 2 feet above the aeration diffusers before turning on a blower. This corresponds to approximately 3 feet of total wastewater depth in the aeration tank.

7) As the tank fills, start the second blower as required to maintain adequate dissolved oxygen levels and promote good mixing. The aeration blowers are designed to operate continuously.

8) Allow the aeration tank to fill and the treated wastewater will automatically overflow to the lagoons for the duration of the season.

9) Normal operation is to overflow to both the East and West lagoons. Valve Nos. P3 and P4 should be open. Refer to Figure 4.1.

10) The lagoon transfer Valve No. P6 should be in the open position during the season.

However, this is optional. The valve is located just south of the Lagoon Outlet Structure.

11) The lagoon drain Valve Nos. P12 and P13 should be closed. Refer to detail on right hand side of Figure 4.3.

Normal Operation

Normal operation for the individual treatment components is described in detail in this section. Normal maintenance for the individual treatment components is contained in chapter 6 with references to the respective operation and maintenance manuals. The following contains some guidelines to verify normal operation.

1) The grinder should be run continuously.

2) Raw sewage flow measurements should be taken daily.

03223 4-5 JULY 2005

3) A minimum of 2 mg/l of dissolved oxygen should be maintained in the aeration/dosing tank. If the park does not have a D.O. (dissolved oxygen) meter, generally if there is no rotten egg odor there is sufficient D.O. present.

4) If rotten egg type odors are present, the second blower should be turned on. Too much air will not harm the aeration treatment process. The dissolved oxygen provided by the blowers provides both the energy for the treatment process to occur and helps to minimize odors.

5) Normal operation is to overflow to both the East and West lagoons. Valve Nos. P3 and P4 should be open. Refer to the yard piping detail in the upper right of contract document drawing No. 7 of 29.

6) The lagoon transfer Valve No. P6 should be in the open position during the season.

Refer to detail on right hand side of Figure 4.3.

Lagoon Discharge

1) First, consult the current NPDES permit and discharge the facultative lagoons in accordance with the permit requirements.

2) Totalized flow discharge volumes need to be recorded in accordance with the NPDES permit requirement at the flow meter structure during discharge.

3) The lagoon transfer valve, Valve No. P6, should be in the closed position during the discharge process to allow for NPDES lagoon isolation requirements. The valve is located just south of the Lagoon Outlet Structure. Refer to Figure 4.3.

4) Valve No. P3 should be closed when isolating Lagoon No. 2 and Valve No. P4 should be closed when isolating Lagoon No. 1. Refer to Figure 4.1.

5) Valve Nos. P7 and P9, located in the outlet structure, are used to discharge the top two

(2) feet for lagoons 1 and 2, respectively. Refer to Figure 4.3.

6) Valve Nos P8 and P10, located in the outlet structure, are used to discharge the remaining two (2) feet.

7) The lagoons should be discharged to the minimum two-foot level at the end of each discharge season.

End of Season – Tank and Lagoons Full

1) Winterize and disengage pump stations.

2) Shut off the inline sewage grinder. (Assuming the pump station and force main are winterized and disengaged.)

3) Operate both blowers until the level of wastewater in the aeration tank is approximately 2 feet to maintain as much mixing as possible. Turn off the aeration blowers once the level of wastewater in the aeration tank is approximately 2 feet. Winterize blowers per manufactures’ specifications.

4) When space is available in the lagoon cells, open all drain valves. The aeration Tank Drain valves are buried Valve Nos. P1, and P2. The lagoon isolation Valve Nos. P3, and P4 should also be open. Valves Nos. P14, P15, P16, and P17 in the Control Building should all be left in the open position when the park pump station is not in service. Refer to Figure 4.1and Figure 4.2. (Note: The Aeration Tank, when full, contains

03223 4-6 JULY 2005

approximately 200,000 gallons of wastewater, which is nearly equivalent to 6 inches in one lagoon.) The aeration tank piping system should be completely drained to the lagoons at the end of the season.

5) The aeration tank should drain completely with about nine inches of water remaining in the bottom sump.

6) Add RV antifreeze to the floor drains, tank sump, and sump pump pit until sump pump operates.

7) When Discharge is complete, Valve No. P11, a buried valve adjacent to the flow measurement manhole, needs to be opened to drain the remaining liquid out of the structure.

8) Cover the flowmeter with a protective box with a heat source. Turn off breaker for flow mag-meter.

03223 4-7 JULY 2005

4.2 CONTROL BUILDING COMPONENTS

The Control Building is located adjacent to the aeration tank at the treatment plant site south of M25 as shown on Figure 2.1. The wastewater generated by the 137 campsites, a sanitation station, and a contact station, enters the site from the north in a 4-inch cement asbestos diameter force main which discharges to a 4” ductile iron force main at the control building.

The Control Building houses the following:

Two (2) Aeration blowers, Flow meter, Main control panel, Sump pump, Exhaust Fan, and

Gravity Back Draft Louver

4.3 ELECTRICAL SERVICE AND ELECTRICAL DISTRIBUTION SYSTEM

Plant utilities include electric service from Detroit Edison Energy Company (DTE

Energy). The service at the Wastewater Treatment Facility is a 120/360 VAC three-phase three

(3) wire system with a connected load of approximately 126 amps. Refer to Figure 4.4 for the

Control Building one-line electrical diagram and panel board layout. More detailed information can be obtained from the component shop drawings and equipment operation and maintenance manuals.

4.4 PLUMBING

The building plumbing consists of a floor drain, which drains to a sump equipped with a submersible pump. The sump pump is piped to discharge to a pipe tap ahead of the grinder, which discharges to the aeration tank.

At the beginning of the season, the sump pump should be tested to ensure proper operation. The sump pump discharge is under tank pressure so the isolation valve at the tap should be closed before removing or servicing the pump or sump pump discharge piping or valves.

There is no building heat and the Control Building floor drains and sump pump pit need to be winterized. Apply RV antifreeze fluid to the comminutor/grinder, floor drains and sump pump pit until sump pump operates.

03223 4-9 JULY 2005

4.5 CONTROL BUILDING VENTILATION SYSTEM

The ventilation system consists of an outside air inlet with a gravity back draft damper and an exhaust fan, complete with louver and gravity back draft damper. The exhaust fan is

120V, 1 phase, 60HZ rated at 900 CFM and 850 RPM. The inlet louver/gravity back draft damper is 6” deep and 24” square. Normal maintenance requirements for the equipment are outlined in the manufacturer’s operation and maintenance manual. The exhaust fan is operated manually or automatically with a thermostat. As the temperature rises in the Control Building to the set point on the thermostat, the exhaust fan will start and draw outside air into the building.

The exhaust fan will continue to run until the temperature in the building drops below the temperature set on the thermostat.

4.6 COMMINUTION/GRINDER

An in-line grinder is provided in the Control Building as shown on Figure 4.2. Flow normally enters the control building via 4-inch diameter force main and flows through the grinder. Bypass valving is provided for isolation of the unit to allow for maintenance of the equipment. Under normal operation, the grinder will operate continuously. If the grinder must be shut down for maintenance while the park is open, the sewage can bypass the grinder by closing valves P15 and P16, and opening valve P14.

The grinder manufacturer, model number, and horsepower ratings are contained in

Appendix A. The unit is sized to handle sewage flows of 250 gpm with a pressure loss of approximately 0.5 psig.

The grinder contains a rotating drum screen that diverts solids into a cutter that is capable of shredding a wide variety of solids. Wastewater solids are transported to the grinder via the waste stream. The solids are passed through the cutters for size reduction. The waste stream again transports the ground up material; however, the small particles pose no threat to down stream equipment. The unit is operated on a continuous basis and should be inspected daily to be sure that large objects are not obstructing operation.

Normal maintenance requirements for the equipment are outlined in the manufacturer’s operation and maintenance manual. In addition to the operating functions above, attention to proper lubrication of bearings and shaft seals as outlined in the manufacturer’s manual for this equipment should be observed.

The grinder manual should be thoroughly reviewed and understood by operating personnel who will attend this mechanism. When performing any work on this unit, it very important that the power supply be turned off and locked out by padlocking the electrical disconnect in the “off” position. In addition, normal plant safety procedures should be followed.

03223 4-10 JULY 2005

The manufacturer’s literature for the unit includes information on maintenance and operation as well as troubleshooting, installation, inspection, spare parts, and lubrication.

Spare parts supplied with the grinder include three (3) time delay fuses and three (3), 6-volt lamps all located inside the controller. In addition, there are two (2) replacement double seal ball bearings, two (2) bottom seal assemblies. These items should be maintained in the spare parts inventory.

Refer to the motor controller interface operation manual for the specific input requirements, graphic indication, and alarms.

4.7 RAW SEWAGE FLOW MEASUREMENT

The raw sewage flow is measured in the Control Building downstream of the grinder.

The flow meter consists of a 4-inch magnetic flow meter. The signal is used for totalizing raw sewage flow and is used for maintaining operational flow records on a daily basis.

Normal maintenance requirements for the equipment are outlined in the manufacturer’s operation and maintenance manual. The manufacturer provides a complete set of operation and maintenance manuals. These were furnished in the operation and maintenance manuals provided by the manufacturers and are referenced in more detail in Chapter 6 of this document.

4.8 AERATION SYSTEM

The purpose of aerating the raw sewage influent is to reduce the wastewater strength, or

Biological Oxygen Demand (BOD), and to raise its dissolved oxygen level before discharging the sewage to the facultative lagoons for additional treatment. The aeration provides treatment, and the aeration action tends to freshen the sewage by maintaining intimate contact with the oxygen in the air and stripping small quantities of obnoxious gases such as hydrogen sulfide.

Wastewater enters the aeration tank through a 4-inch diameter influent pipe above the high-water level. The aeration tank consists of an A.O. Harvester glass-lined tank with a concrete floor slab. In addition to the normal tank maintenance outlined in the manufacturer’s operation and maintenance manual, the following should be addressed:

1. Remove and dispose of accumulated grit at the end of the season.

2. Inspect tank aeration header system.

3. Replace or repair any damaged diffusers.

Two positive displacement air blowers located in the Control Building are supply air to the aeration tank. The design is to operate both blowers during peak season and one blower at lower loading periods. The option is available to cycle the blowers by via a 24-hour timer.

03223 4-11 JULY 2005

The 24-hour timer has been provided to make available the ability to run the blower(s) intermittently to reduce power costs. The timer is similar to that used to operate a common household water softener; refer to Appendix A and the timer operation and maintenance manual. The tabs on the timer are manually set to control which hours of the day the blowers run.

The blowers, Roots Dresser Model 56 RAI-U, Inc., are each supplied with, 15 HP, 3 phase, 60 hertz, 460-volt motors. The blowers should always be started with all discharge valves open. Should the valves be closed upon blower start-up, pressure relief valves will open to protect the system from over pressurization. In the event of a power outage and once power is restored, the blowers will have to be manually restarted at the control panel.

Inspection, lubrication and maintenance instructions for the blowers are contained in

Gardener-Denver’s operation and maintenance literature.

Model F64-4 inlet air filters are provided for each blower and the filter elements will require cleaning or replacement periodically in accordance with the manufacturer’s recommendations and experience. Model D13R-4 inlet and Model PD33-4 discharge silencers are provided for noise reduction and should be maintained in accordance with the manufacturer’s recommendations.

The blowers discharge to Sanitaire Model D-24 stainless steel coarse bubble diffusers in the aeration tank.

There are two overflow pipes in the aeration tank. The lower of the two normally overflows to the lagoon as flow enters the tank. The upper pipe, or emergency overflow, should only function if there is a problem with the normal gravity overflow. The aeration tank emergency overflow should be inspected daily at the aeration tank. If an emergency overflow event occurs, the following items should be checked:

First, visually inspect the tank gravity and emergency overflow pipe inside the tank.

03223 4-12 JULY 2005

Second, if the liquid level is above the invert of the emergency overflow pipe, make sure Valve Nos. P3 and P4 are open to the lagoons. Refer to Figure 4.1.

Third, if the liquid level in one lagoon is higher, one of the influent lines may be plugged. First, close the influent valve to the lagoon with the higher liquid level, open Aeration Tank Bypass Valve P1, and manually operate the pump station. Once completed, close valve P1 and open both lagoon influent valves. Refer to Figure 4.1.

In the event that one lagoon influent pipe becomes plugged and cannot be cleared, the lagoon transfer valve No. P6 can be opened. This will allow the lagoon levels to equalize until a contractor can be retained to remedy the problem. Refer to the detail in the right side of Figure 4.3.

4.9 CONTROL PANELS

The control panel (CP1) consists of the following components:

Two (2) NEMA Size 2 blower contactor/starters with thermal overload relays

One (1) 24-hour time switch for setting blower operation times.

The panel contains “Running” lights, which indicate if the aeration blower(s) are running.

The blower starter knob indicates “Hand”, “Off”, and “Auto”. If the blower is set on “Hand”, the blower will run continuously. If the blower is set to “Auto”, the blower will operate based on the

Tork timer/24-hour clock timer settings. If the blower shuts off, repair the problem, and press the reset button.

The timer is like that used to operate a common household water softener, refer to the timer operation and maintenance manual. As discussed previously, the tabs on the timer are manually set inside the control panel (CP1) to determine which hours of the day the blowers would run.

In general, to determine if the warning/run lights are functioning properly, depress the light.

The lighting panel contains 20-amp breakers for the lights; exhaust fan, magnetic flow meter and receptacles.

4.10 FACULTATIVE LAGOONS

Lagoon General Description

A facultative lagoon is designed for treating wastewaters from small communities or industrial plants. Stabilization ponds have been utilized as part of a treatment scheme or as the sole process, providing complete treatment. In this case, the lagoon is a component of a larger treatment scheme, following the aeration tank.

Table 4.1 outlines the physical description of the facultative lagoons at the Port Crescent

State Park Wastewater Treatment Facilities.

03223 4-13 JULY 2005

Table 4.1

Port Crescent Facultative Lagoon Design Details

Parameter Description

Number: 2

Area: 1.2 acres @ Mid-depth

Water Depth: 6 feet

Working Depth: 4 feet

Volume: 1,570,000 gallons

The lagoons use biological, chemical, and physical processes to treat and dispose of wastewater, refer to Figure 4.5. Aerobic decomposition, requiring oxygen, occurs near the water surface. Aerobic microorganisms convert waste into carbon dioxide, ammonia, and phosphates, which algae use as a food source. In turn, algae present in the lagoon use carbon dioxide and give off oxygen. The aerobic microorganisms are near the surface of the lagoon, where air movement or wind introduces oxygen into the system. Anaerobic decomposition occurs near the bottom of the lagoon where there is little oxygen, and anaerobic microorganisms are found. These microorganisms break down wastes into gases, such as hydrogen sulfide, ammonia, and methane.

Figure 4.5 Facultative Lagoon Process.

The facultative lagoons consist of two lagoons totaling 1.57 million gallons, an outlet structure, and a flow measurement structure with seasonal surface water discharge to an outfall

03223 4-14 JULY 2005

structure at the Ahearn Drain. Refer to process schematic, Figure 2.2.

4.11 LAGOON OPERATION

Normal operation –Not Discharging:

Overflow from the aeration tank to both lagoons. Valve Nos. P3 and P4 should be open.

Refer to the yard piping detail in the upper right of contract document drawing No. 7 of 29.

The lagoon transfer Valve No. P6 can be in the open position during the season to allow the lagoons levels to equalize. P6 is a buried valve located just south of the Lagoon Outlet Structure.

Valves P7, P8, P9, and P10 in the outlet structure should be closed. Refer to the Lagoon Outlet Structure Details on Figure 4.3.

The Flow Measurement Structure drain Valve P11 should be closed. P11 is a buried valve located adjacent to the Flow Measurement Structure; refer to bottom left of Figure 4.3.

Lagoon drain valves P12 and P13 should always remain closed except for lagoon cleaning. Valve Nos. P12 and P13 are buried valves located approximately 15 feet north of the Flow Measurement Structure. Refer to contract document drawing No. 7 of 29.

Discharge Season:

First, consult the current NPDES permit and discharge the facultative lagoons in accordance with the permit requirements.

Valve No. P3 should be closed when isolating Lagoon No. 2 and Valve No. P4 should be closed when isolating Lagoon No. 1. Refer to Figure 4.1

The lagoon transfer valve, Valve No. P6, should be in the closed position during the discharge process to allow for NPDES lagoon isolation requirements. The valve is located just south of the Lagoon Outlet Structure. Refer to Figure 4.3.

Valve Nos. 7 and 9, located in the outlet structure, are used to discharge the top two (2) feet for lagoons 1 and 2, respectively. Refer to Figure 4.3.

Valve Nos 8 and 10, located in the outlet structure, are used to discharge the remaining two (2) feet. The lagoons should be discharged to the minimum two-foot level at the end of each discharge season. Refer to Figure 4.3.

The lagoon drain Valve Nos. P12 and P13 should be closed. Refer to contract document drawing No. 7 of 29.

When Discharge is complete, Valve No. P11, located adjacent to the flow measurement manhole, needs to be opened to drain the remaining liquid out of the structure.

03223 4-15 JULY 2005

4.12 LAGOON OUTLET STRUCTURE

First, note that all discharge should be completed in accordance with the most recent

NPDES permit and associated MDEQ discharge certificate contained in the Regulatory

Requirements section.

The outlet structure consists of valved draw-offs (Valves P7, P8, P9, P10) to allow for discharging the lagoons at two-foot intervals, refer to Figure 4.3. Valve No. 7 or 9 should be opened to discharge the initial 2-feet and Valve Nos. 8 or 10 should be opened to discharge the remaining volume. It may be operationally advantageous to partially open the valve to limit the amount of volume being discharge during a given discharge event. Valve Nos. P8 and P10 will maintain the minimum of 2’-0” of wastewater in the lagoons, respectively.