Attachment 004 Erosion Control.pdf

Erosion, Sedimentation, & Pollution Control Plan

Hall County Landfill Gainesville, Georgia

Cell 3 Construction Project No. 152292

September 2023

Attachment #004 Erosion Control

Erosion, Sedimentation, & Pollution Control Plan prepared for

Hall County Landfill

Cell 3 Construction Hall County, Georgia

Project No. 152292

September 2023

Stormwater Pollution Prevention Plan Certification

Hall County Landfill Cell 3 Construction

ESPCP DESIGNER:

"I certify under penalty of law that this Plan was prepared after a site visit to the locations described herein by myself or my authorized agent, under my supervision."

"I certify that the permittee's Erosion, Sedimentation and Pollution Control Plan provides for an appropriate and comprehensive system of Best Management Practices required by the Georgia

Water Quality Control Act and the document "Manual for Erosion and Sediment Control in

Georgia" (Manual) published by the Georgia Soil and Water Conservation Commission as of

January 1 of the year in which the land-disturbing activity was permitted, provides for the sampling of the receiving water(s) or the sampling of the storm water outfalls and that the designed system of Best Management Practices and sampling methods is expected to meet the requirements contained in the General NPDES Permit No. GAR 100001."

“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.”

Bryan Weldon, PE, GA 54720

Date

OWNER REPRESENTATIVE:

“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 gathered and evaluated 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.”

Signature of permittee or “duly authorized agent”

Printed name

Date

RECORD OF ESPCP REVISIONS

Date Sections Modified Description of Modification Approval Signatures

CONTRACTOR NOTIFICATION

"I certify under penalty of law that I have personally read, understood, and accepted all terms and conditions of the Storm Water Pollution Prevention Plan, and that I shall implement the plan accordingly. I am also familiar with the NDPDES General Permit for Storm Water Discharges Associated with Construction Activity (NDR11-

0000).

Signature For Responsible for

(Name)

(Position)

(Signature)

(Date)

(Company)

(Street / P.O. Box)

(City, State, Zip)

(Phone)

(Activity)

Erosion, Sedimentation & Pollution Control Plan Introduction

Hall County Cell 3 Construction TOC-1 Burns & McDonnell

TABLE OF CONTENTS

Page No.

1.0 INTRODUCTION

1.1 Project Location and Description

1.1.1 Existing Conditions

1.2 Project Owner and Operator

1.3 Certifications and Notifications

1.4 Standard Permit Conditions

1.4.1 Duty to Comply with Permit Conditions

1.4.2 Final Stabilization and Termination of Coverage

1.4.3 Retention of Records

2.0 CONSTRUCTION ACTIVITIES AND SITE DESCRIPTION

2.1 Description of Construction Activities & Phases

2.2 Sequence of Construction Phases

2.2.1 Construction Schedule

2.3 Soils

2.4 Potential Pollutants

2.5 Site Vicinity Maps

2.6 Receiving Waters

2.7 Buffers

2.8 Threatened and Endangered Species

2.9 Cultural Resources

3.0 ES&PC PLAN CHECKLIST

3.1 ES&PC Plan Completed Checklist

3.2 ES&PC Plan Checklist Responses

4.0 BEST MANAGEMENT PRACTICES

4.1 Temporary BMPs

4.1.1 Delineated Disturbance Areas

4.1.2 Topsoil Preservation

4.1.3 Stabilized Construction Entrances – Co & Cr

4.1.4 Silt Fence – Sd1-NS

4.1.5 Concrete Washout

4.1.6 Dust Control

4.1.7 Dewatering

4.1.8 Temporary Sediment Basins – Sd3

4.1.9 Riprap

4.1.10 BMPS for Impaired Stream Segment

4.2 Permanent BMPs

4.2.1 Permanent Detention Basin

4.2.2 Permanent Drainage Channel - Wt

Hall County Cell 3 Construction TOC-2 Burns & McDonnell

4.2.3 Permanent Underdrain – Dn2

4.3 Stabilization Measures

4.3.1 Seeding – Ds2 & Ds3

4.3.2 Mulching

4.3.3 Fertilizer

4.3.4 Slope Stabilization - Ss

4.4 Maintenance and Inspections

4.5 Sampling

4.5.1 Sampling Frequency

4.5.2 Sample Collection & Analytical Methods

4.5.3 Reporting Sampling Results

4.6 Final Stabilization and Removal of Temporary Controls

5.0 GOOD HOUSEKEEPING

5.1 Material Handling

5.2 Solid and Liquid Waste Disposal

5.3 Hazardous Waste

5.4 Sanitary Waste

5.5 Non-Stormwater Discharges

5.6 Vehicle Washing

5.7 Water Source

6.0 SPILL PREVENTION AND CONTROL

6.1 Material Management Practices

6.2 Non-Petroleum Products

6.3 Petroleum Products

6.4 Spill Control and Cleanup

APPENDIX A – NDPDES GENERAL CONSTRUCTION STORMWATER PERMIT

APPENDIX B – NOTICE OF INTENT

APPENDIX C – ES&PC PLAN CHECKLIST

APPENDIX D - GENERAL VACINTY MAP

APPENDIX E - RECEIVING WATERS AND WETLANDS

APPENDIX F – SOILS REPORT

APPENDIX G – DRAINAGE DELINEATION

APPENDIX H – THREATENED AND ENDANGERED SPECIES

APPENDIX I - NOTICE OF TERMINATION

APPENDIX J – EROSION AND SEDIMENT CONTROL PLAN AND BMP

DETAILS

APPENDIX K – ES&PC PLAN INSPECTION FORM

APPENDIX L – SPILL REPORTING INFORMATION

Hall County Cell 3 Construction TOC-3 Burns & McDonnell

LIST OF TABLES

Page No.

Table 1-1: Project Contact Information

Table 2-1: Proposed Construction Schedule

Table 2-2: Soil Types within the Project Site

Table 2-3: Federally Listed Species for Gainesville, Georgia

Hall County Cell 3 Construction i Burns & McDonnell

LIST OF ABBREVIATIONS

Abbreviation Term/Phrase/Name

BMPs Best Management Practices

CFR Code of Federal Regulations

EPD Environmental Protection Department

EPA U.S. Environmental Protection Agency

ESPCP Erosion, Sediment and Pollution Control Plan

GDNR Georgia Department of Natural Resources

Landfill Hall County Landfill

NOAA National Oceanic and Atmospheric Administration

NOT Notice of Termination

NPDES National Pollutant Discharge Elimination System

MSW Municipal Solid Waste

Permit

Georgia Pollutant Discharge Elimination System Storm Water

Discharges Associated with Construction Activity For Stand

Alone Construction Projects General Permit GAR100001

Project Cell 3 Construction

SDS Safety Data Sheet

SOC Security and Operations Center

TMDL Total Maximum Daily Loads

WPB Watershed Protection Branch

Stormwater Pollution Prevention Plan Error! Reference source not found.

Best Management Practices

Hall County Cell 3 Construction 1 Burns & McDonnell

1.0 INTRODUCTION

The U.S. Environmental Protection Agency (EPA) requires a National Pollutant Discharge Elimination

System (NPDES) Permit for stormwater discharges from construction activities that disturb one or more acres of land or from smaller sites that are part of a larger, common plan of development or sale which will disturb a cumulative total of one or more acres. For the purposes of the NPDES program, construction activities are defined as clearing, grubbing, grading, excavating, and filling.

In the State of Georgia, the NPDES program has been delegated to the Georgia Environmental Protection

Division (EPD), Watershed Protection Branch (WPB) through the Georgia Department of Natural

Resources (GDNR). Construction projects issued a certificate of permit coverage under the Georgia

Pollutant Discharge Elimination System Storm Water Discharges Associated with Construction Activity

For Stand Alone Construction Projects General Permit GAR100001 (Permit) are granted permission to discharge stormwater associated with construction activities into waters of the state. The Permit is issued pursuant to the provisions of the Georgia Water Quality Control Act and the Federal Clean Water Act.

Stormwater discharges from construction activities associated with the Cell 3 Construction (Project) for

Hall County Landfill (Landfill), will be authorized under the 2018 Permit. A copy of the Permit is provided in Appendix A. The associated Permit checklist can be found in Appendix C.

Coverage under the Permit is obtained by submitting an online Stormwater Permit Application.

Construction activities must not commence until an authorization has been issued by the EPD. The issued

Notice of Intent will be placed in Appendix B upon receipt.

The Erosion, Sedimentation, and Pollution Control Plan (ESPCP) described herein establishes a plan to manage the quality of stormwater runoff from construction activities associated with the Project. This

ESPCP was developed in accordance with requirements and guidelines specified in Part IV of the Permit and is to be used by onsite construction personnel to minimize soil erosion and limit the potential for sediment and other pollutants to leave the Project site and enter waters of the state. The ESPCP must be updated and revised when stormwater and sediment control best management practices (BMPs) are modified due to a change in design, construction methods, operations, maintenance procedures, etc.

1.1 Project Location and Description

The Project will consist of regrading the area in and around Cell 3 with a total of 39 acres of land disturbed. The limits of disturbance shall not exceed 50 acres at any one time. The project is located at coordinates 34.247825, -83.798492 in Hall County at 1700 Oakbrook Dr, Gainesville, GA 30507, as depicted on the General Vicinity Map provided in Appendix D. The construction entrance and exit will be

Hall County Cell 3 Construction 2 Burns & McDonnell located at the coordinates as seen in Appendix J. The approximate disturbance acreage is a total of equivalent to the total acreage of the entire construction project.

The Project includes the addition of 15.5 acres of new impervious area. This new impervious area consists of a new, lined landfill cell (Cell C) that will have a leachate collection system on top of the geomembrane liner. All leachate within Cell C will be pumped and treated at the onsite leachate treatment facilities. All Erosion, Sediment, and Pollution Control construction will be done in three phases in accordance with the Permit. Construction is estimated to begin September 2023 and be completed by

March 2024. See Section 2.0 for the description of construction activities.

1.1.1 Existing Conditions

The site is part of a landfill that plans on expanding to construct a third cell at the southeast of the site.

Previously, this site was forested land with a natural intermittent creek running through a portion of the site.

1.2 Project Owner and Operator

Contact information for the Landfill, the primary permittee, is provided below:

Hall County Landfill

Bill Nash – Director of Public Works & Utilities

2875 Browns Bridge Road

Gainesville, GA 30504

Phone: (770) 531-6800

Email: bnash@hallcounty.org

Contact information for Project personnel is provided in Table 1-1 and will be updated as additional contacts are identified.

Table 1-1: Project Contact Information

Name Title Company Phone Number Bryan Weldon Project Manager Burns & McDonnell 612-458-7512

The General Contractor selected to construct the Project will be responsible for implementing and maintaining the ESPCP controls and following Permit requirements. Onsite responsibilities include implementing the ESPCP, directing the installation and maintenance of BMPs, inspecting the Project site for compliance, implementing and supervising housekeeping, keeping records of inspections and other

Hall County Cell 3 Construction 3 Burns & McDonnell activities, providing staff training, communicating changes in the ESPCP to onsite personnel, and periodic evaluation of the ESPCP provisions onsite. The General Contractor will be the 24-hour contact responsible for erosion, sedimentation, and pollution control.

1.3 Certifications and Notifications

In accordance with the Permit, the ESPCP must be written and certified by an individual trained in erosion prevention, sediment control, and permanent stormwater treatment, including a Level II Erosion and Sediment Control certification. The certification statement form is provided at the front of this

ESPCP.

Additionally, the contractor and subcontractors must sign the Contractor Notification Form (located near the front of the Plan, copy as needed), which signifies they have read, understand, and will adhere to the

ESPCP before conducting any construction work that involves soil disturbance. The signed notification confirms that the Landfill has notified its subcontractors that an ESPCP has been prepared for the Project, and that the contractor or subcontractors must perform the necessary actions identified to comply with the

ESPCP and the Permit. To maintain compliance with the Permit, the contractor or subcontractor may need to implement additional erosion and sediment control BMPs and pollution prevention measures that are not addressed in this ESPCP. If additional controls are implemented, then the ESPCP must be modified accordingly by an individual trained in ESPCP design.

1.4 Standard Permit Conditions

This section discusses State and Federal penalties for noncompliance with the Permit as well as standard

Permit conditions. The staff responsible for implementation of the ESPCP must be familiar with the requirements of the ESPCP and the Permit.

1.4.1 Duty to Comply with Permit Conditions

EDP, as well as the EPA, have substantial penalties for noncompliance with the Permit. Failure to comply with Permit conditions is a violation of the Permit and the statutes under which it was issued and is grounds for enforcement action, including denial of Permit renewal application, fines, imprisonment, termination of coverage under the Permit, or requirement for a discharger to apply for and obtain an

Individual Permit.

1.4.2 Final Stabilization and Termination of Coverage

Final stabilization has been achieved when all soil-disturbing activities at the Project site have been completed and a uniform (i.e., evenly distributed, without large bare areas) perennial vegetative cover has

Hall County Cell 3 Construction 4 Burns & McDonnell been established on all unpaved areas. The vegetative cover density must be equal to or greater than 70 percent of the native background vegetative cover density for the area. For those areas not covered by permanent structures or stabilized with vegetation, an equivalent permanent stabilization measure (such as riprap, crushed rock, gabions, or geotextiles) must be used. All conveyance systems must be cleaned of any sediment buildup and returned to pre-Project conditions.

When construction activities authorized by the Permit are complete and the site has achieved final stabilization, all temporary erosion and sediment control BMPs must be removed from the site and Permit coverage must be terminated. Permit coverage is terminated by submitting an online Notice of

Termination (NOT) within 30 days after all permit termination conditions are completed as outlined in

Section VI(A) of the Permit. A completed copy of the NOT will also be added to Appendix I upon Project completion.

1.4.3 Retention of Records

The following is the required retention of records according to Part IV.F of the Permit.

1) The primary permittee shall retain the following records at the construction site or the records shall be readily available at a designated alternate location from commencement of construction until such time as a NOT is submitted in accordance with Part VI:

a) A copy of all Notices of Intent submitted to EPD;

b) A copy of the Erosion, Sedimentation and Pollution Control Plan required by the Permit;

c) The design professional’s report of the results of the inspection conducted in accordance with Part

IV.A.5. of the Permit;

d) A copy of all sampling information, results, and reports required by the Permit;

e) A copy of all inspection reports generated in accordance with Part IV.D.4.a. of the Permit;

f) A copy of all violation summaries and violation summary reports generated in accordance with

Part III.D.2. of the Permit; and

g) Daily rainfall information collected in accordance with Part IV.D.4.a.(2). of the Permit.

2) Copies of all Notices of Intent, Notices of Termination, inspection reports, sampling reports

(including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation) or other reports requested by the EPD, Erosion, Sedimentation and Pollution Control Plans, records of all data used to complete the Notice of Intent to

Hall County Cell 3 Construction 5 Burns & McDonnell be covered by the Permit and all other records required by the Permit shall be retained by the permittee who either produced or used it for a period of at least three years from the date that the

NOT is submitted in accordance with Part VI. of the Permit. These records must be maintained at the permittee’s primary place of business or at a designated alternative location once the construction activity has ceased at the permitted site. This period may be extended by request of the EPD at any time upon written notification to the permittee.

Hall County Cell 3 Construction 6 Burns & McDonnell

2.0 CONSTRUCTION ACTIVITIES AND SITE DESCRIPTION

The following sections include a description of the Project site construction activities as well as information regarding the natural and biological resources on and adjacent to the Project site.

2.1 Description of Construction Activities & Phases

The Project will construct a new landfill cell, Cell 3, which will add approximately 15.5 acres of MSW disposal area. In accordance with the Permit, there are three phases in the ESPCP: Phase I – the Initial

Phase, Phase II – the Intermediate Phase, and Phase III – the Final Phase. Phase I includes clearing and grubbing where 29.0 acres will be cleared and grubbed. In Phase I, appropriate erosion and sediment control BMPs must be installed prior to the start of any land-disturbing activities and must be maintained

(repaired and replaced as necessary) throughout construction until permanent stabilization has been established in the Final Phase. Phase II includes grading and excavating where 9.0 acres will be filled with excavated material from Cell 3 and 4. Underdrain will be placed in Phase II as well below the future

Cell 3 and 4 liner and at the trough of the fill area to facilitate groundwater drainage towards the wetlands north of the Project site. After earthwork and placement of underdrain is completed, the Cell 3 liner and pipe work will be installed. These control measures and their locations are described in detail in Chapter

1.0 of this document and in the Manuel for Erosion and Sediment Control. Additional control measures may be installed as construction progresses. Once construction is complete, the temporary workspaces and staging areas will be restored to pre-Project conditions for the Final Phase.

2.2 Sequence of Construction Phases

The following is a list of the planned activities and implementation of erosion and sediment control BMPs for Project construction. Construction activities are currently scheduled to begin September 2023 and be complete by March 2024. Project construction will include the following sequence of activities:

1. Phase I:

a. Install erosion and sediment control measures at the Project site prior to the start of ground-disturbing activities.

b. Mobilize to site and establish work areas.

c. Clearing and grubbing.

d. Placement of underdrain

2. Phase II:

a. Excavate and stockpile soils

Hall County Cell 3 Construction 7 Burns & McDonnell

b. Grade and compact soils

c. Install Cell 3 liner and pipework

3. Phase III:

a. Stabilize project site

b. Install permanent BMPs

c. Install permanent grassing.

d. Stabilize project site.

e. Remove BMPs after completion of construction activities and upon final stabilization of the site.

f. Clean up site and submit NOT to EPD once all areas have been permanently stabilized.

2.2.1 Construction Schedule

A more detailed construction schedule can be seen below. The schedule may be updated upon procurement of the General Contractor.

Table 2-1: Proposed Construction Schedule

Activity

2023 2024

October November December January February March April

1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4

Install

Perimeter

BMPS X X

Clearing and

Grubbing X X X X X X

Temporary

Stabilization X X X X X X

Excavation

Activities X X X X X X X X X X X X

Install utilities X X X X

BMP

Maintenance X X X X X X X X X X X X

2.3 Soils

According to the U.S. Department of Agriculture, Natural Resources Conservation Service Web Soil

Survey of Hall County, Georgia, four soil types are located on the Project site. A map of the site soils is provided in Appendix F, and the four soil types are detailed in Table 2-1 below.

Hall County Cell 3 Construction 8 Burns & McDonnell

Table 2-2: Soil Types within the Project Site

Soil Type Map Unit Symbol

Erosion K Factora

Hydrologic Soil Groupb

Gwinnett clay loam, 6 to 10 percent slopes, eroded GwC2 0.20 B

Gwinnett clay loam, 10 to 25 percent slopes, eroded

GwE2

0.20 B

Musella cobbly clay loam, 15 to 35 percent slopes MuF 0.15 D

Pacolet-Tallapoosa association, steep PTF 0.17 B

Toccoa soils To 0.32 A

Source: U.S. Department of Agriculture, Natural Resources Conservation Service, Web Soil Survey. Accessed June

12, 2023, from http://websoilsurvey.nrcs.usda.gov/app/WebSoilSurvey.aspx.

(a) The erosion K factor for the upper horizon of the onsite soil types ranges from 0.24 to 0.28. The erosion K factor, with possible values ranging from 0.02 to 0.69, signifies how susceptible a soil is to sheet and rill erosion by water.

The larger the K value, the more susceptible the soil is to erosion. The soils on the Project site have a moderate susceptibility to erosion by water.

(b) Hydrologic soil group indicates the infiltration rate of the soil: Group A at > 0.30 inch/hour, Group B at 0.15-

0.30 inch/hour, Group C at 0.05-0.15 inch/hour, and Group D at 0.00-0.05 inch/hour.

2.4 Potential Pollutants

The primary potential pollutant sources on the Project site are anticipated to be newly disturbed soils and subsequent stormwater runoff. BMPs will be used to control erosion and sedimentation and are discussed in further detail in Chapter 1.0. Other potential pollutant sources include petroleum products needed for construction equipment, fertilizers, pesticides, paints, solvents, etc. BMPs for product-specific practices are discussed in Chapters 5.0 and 6.0.

2.5 Site Vicinity Maps

The General Vicinity Map is provided in Appendix D. The Erosion and Sediment Control Plan and BMP details are provided in Appendix I. The Project site’s drainage area delineation, acreage, and outfall locations are illustrated on Figure 2 of Appendix G.

2.6 Receiving Waters

The Project site is located within the property boundaries of an active municipal solid waste (MSW) landfill. The site is within the Upper Oconee River Basin specifically in the HUC 12-030701010103 basin. Most of the stormwater discharge from the Project site will flow south, southeast from the Site into the unnamed riverine located on the southern side of the Landfill property. The riverine drains eastward into Tributary 9 which flows into Allen Creek. Location of the riverine, tributary, and creek are illustrated in the Receiving Waters and Wetlands Exhibit in Appendix E. A portion of Allen Creek, from Monroe

Drive to Banigan Branch, is within 1 mile of the Project site and is listed as a category 4a impaired in

Water Quality in Georgia 2020-2021 (2022 Integrated 305b/303d Report). Within this portion of Allen

Hall County Cell 3 Construction 9 Burns & McDonnell

Creek, there is one Total Maximum Daily Load (TMDL) for Fecal Coliform according to a TMDL study completed in 2002 (revised in 2007). Discharge from the Project first enters Tributary 9 before entering the impaired water. Tributary 9 enters the impaired water approximately 0.85 miles from the site. The measured load of Fecal Coliform in Allen Creek in 2007 was 8.19x1013 counts/30 days which exceeds the

Fecal Coliform TMDL of 8.44x1012 counts/30 days by 57 percent. There are also six other streams within

1 mile of the project site that support warm water fisheries. These six streams are delineated in the

Receiving Waters and Wetlands Exhibit in Appendix E.

Due to the Projects site’s proximity to these warm water fisheries, Project size of 39 acres, and the drainage areas <4.99 square miles, the maximum acceptable Nephelometric Turbidity Unit (NTU) for each of the three drainage areas is 50 NTU. Discharge of sediment laden stormwater runoff from the

Project site will be minimized through proper implementation and maintenance of BMPs throughout the

Project site and adherence to the additional requirements for discharge to impaired waters as detailed in the Permit as necessary.

2.7 Buffers

Non-exempt activities shall not be conducted within the 25 or 50-foot undisturbed stream buffers as measured from the point of wrested vegetation or within 25-feet of the coastal marshland buffer as measured from the Jurisdictional Determination Line without first acquiring the necessary variances and permits. The 200-foot state water buffer can be seen on sheets C018, C019, and C020 in Appendix J.

2.8 Threatened and Endangered Species

According to the U.S. Fish and Wildlife Service, one endangered species and five migratory birds protected under the Migratory Bird Treaty Act and the Bald and Golden Eagle Protection Act have been identified in Hall County. These species and their respective status are listed in Table 2-2.

Table 2-3: Federally Listed Species for Gainesville, Georgia

Common Name Scientific Name Federal Status Northern Long-eared Bat Myotis septentironalis Endangered

Whooping Crane Grus americana Experimental population, Non-essential

Monarch Butterfly Danaus plexippus Candidate

Small Whorled Pogonia Isotria medoloides Threatened

Smooth Coneflower Echinacea laevigata Threatened

Wood Thrush Hylocichla mustelina Birds of Conservation Concern list

Source: U.S. Fish and Wildlife Service, Information for Planning and Consultation. Accessed August 24, 2023.

Hall County Cell 3 Construction 10 Burns & McDonnell

Based on the construction activities required to complete the Project, it is unlikely that there will be any negative impacts to the species listed above. Appropriate BMPs will be installed prior to the commencement of construction activities, and additional BMPs will be installed as needed during construction to limit sediment or other potential pollutants from being discharged offsite. No critical habitat for the species listed above is known to occur within Hall County. Appendix H contains more information on these species.

2.9 Cultural Resources

Cultural resources are not located in the area of disturbance according to the National Register of Historic

Places from the National Parks Service. If found, workers must stop work immediately and notify both the Landfill and the construction office upon discovery of items with potential historical significance, including but not limited to, arrowheads, bones, old bottles or building materials, building foundations, and suspected gravesites. If human remains are unearthed during excavation work, the area must be secured, and the local law enforcement agency must be contacted immediately.

Stormwater Pollution Prevention Plan ES&PC Plan Checklist

Hall County – Cell 3 Construction 1 Burns & McDonnell

3.0 ES&PC PLAN CHECKLIST

3.1 ES&PC Plan Completed Checklist

The completed ES&PC checklist is shown below. Instead of page numbers, there are section numbers or the appendix referring to the location of the checklist item. A more detailed description of the checklist item can be found in section 3.2 of this Plan.

Hall County – Cell 3 Construction 2 Burns & McDonnell

Hall County – Cell 3 Construction 3 Burns & McDonnell

3.2 ES&PC Plan Checklist Responses

[1] The applicable ES&PC Checklist is in Section 3.1 of this Plan. The checklist can also be found in

Appendix C.

Hall County – Cell 3 Construction 4 Burns & McDonnell

[2] Level II Certificate holder can be seen at the front of this document.

[3] Limits of disturbance are not greater than 50 acres at any one time. The total acreage disturbed for this site can be found in section 1.1 of this report.

[4] The 24-hour contact on site will be the contractor and their information will be included in section 1.2 once a contractor is selected.

[5] The Primary Permittee is Bill Nash and his information can be found in section 1.2 of this report.

[6] The total acreage disturbed as well as the total acreage disturbed during each phase can be found in section 1.1.

[7] The GPS location of the construction entrance can be found on Sheet C018 of the ESCP Sheet set.

[8] The initial plan date can be found on the title page of this report.

[9] A description of the construction activity can be found in section 2.1 of this Plan. A description of the existing conditions can be found in section 1.1.1 of this plan.

[10] The vicinity map can be found in Appendix D.

[11] The receiving waters are identified in Section 2.6 of this report. A map of the receiving waters and wetland can be found in Appendix E.

[12] The design professional’s certificate signature addressing Part IV of the Permit can be found at the front of this Plan.

[13] The design professional’s certificate signature addressing Part IV of the Permit can be found at the front of this Plan.

[14] The statement in accordance with Part IV.5.a can be found in section 4.1 of this report.

[15] The buffer encroachment statement can be found in section 2.7 of this Plan.

[16] The buffers for this site are noted in section 2.7 of this Plan.

[17] This statement can be found in section 4.0 of this Plan.

[18] This statement can be found in section 5.2 of this Plan.

[19] This statement can be found in section 4.0 of this Plan.

[20] This statement can be found in section 4.0 of this Plan.

[21] This statement can be found in section 4.3 of this Plan.

[22] Allen Creek is an impaired stream located within one mile of the project site as described in section

2.6. There are four BMPs chosen to mitigate the effect of construction discharge onto this stream shown in section 4.1.10 in this Plan.

[23] The latest TMDL Implementation Plan for the impaired section of Allen Creek was done in 2002 but updated in 2007. The results of this plan can be found in section 2.6 of this Plan.

[24] BMPs for concrete washouts can be found in section 4.1.5 of this Plan.

[25] BMPs for the remediation of spills and leaks can be found in section 6.0 of this Plan.

Hall County – Cell 3 Construction 5 Burns & McDonnell

[26] The description of all BMPs installed throughout construction can be found in section 4.0 of this

Plan.

[27] The description of practices to provide cover for building materials can be found in section 6.0.

[28] The description of practices to reduce the pollutants in stormwater discharge can be found in section

6.0 of this report.

[29] The construction schedule can be seen in section 2.2 of this Plan.

[30] The completed requirements of inspection and record keeping by the primary permittee can be found in section 1.4 of this Plan.

[31] Requirements for sampling frequency and reporting of sampling frequency can be found in section

4.5 of this Plan.

[32] The complete details for the retention of records can be found in section 1.4.3 of this Plan.

[33] A description of analytical methods for collecting and analyzing samples are in section 4.5 of this

Plan.

[34] Appendix B rationale for NTU values at outfall sampling points can be seen in section 4.5.3 of this report.

[35] The location for the sampling points can be found on sheets C018, C019, and C020 of Appendix J.

[36] A description of appropriate controls used for initial, intermediate, and final phases can be found in section 4.0. The location of these controls can be found on sheets C018, C019, and C020 of Appendix J.

[37] The graphic scale and North arrow is present on every phase in C018, C019, and C020 of Appendix

J.

[38] The existing and proposed contour lines can be seen on the sheets in C018, C019, and C020 of

Appendix J.

[39] There will not be any alternative BMPs used for this project.

[40] There will not be any alternative BMPs used for this project.

[41] The 25-foot undisturbed buffer adjacent to State waters can be found in Appendix E.

[42] Delineated receiving waters and wetlands can be found in Appendix E.

[43] The HUC drainage areas on site can be seen in Appendix G.

[44] The delineated drainage basins and their acreage of the site can be found in Appendix G.

[45] An estimate of the runoff coefficient or peak discharge flows are called out in Appendix G.

[46] There are no storm drains on site, there is an underdrain that only serves as an outlet for elevated groundwater.

[47] The soil series delineation for this site can be found in Appendix F.

[48] The limits of disturbance for each phase of this site can be seen in Appendix J.

Hall County – Cell 3 Construction 6 Burns & McDonnell

[49] There is a permanent sediment basin being placed instead of a temporary sediment basin. The permanent sediment basin is sized to hold more than the required 67 cubic yards of sediment per disturbed acre. The total sediment storage and location of the basin can be found on sheets C018 and

C019 in Appendix J.

[50] The location of BMPs using the uniform coding symbols from the manual, Chapter 6, with the legend can be found on sheet C021 of Appendix J.

[51] Detailed drawings for all erosion control BMPs for this project can be found on sheet C022 of

Appendix J.

[52] The vegetative plan can be found in Appendix J.

Stormwater Pollution Prevention Plan Best Management Practices

4.0 BEST MANAGEMENT PRACTICES

The following sections detail the proposed erosion and sediment control BMPs to be used on the Project site during construction to manage stormwater flow and quality.

The escape of sediment from the site shall be prevented by the installation of erosion and sediment control measures and practices prior to land disturbing activities. Soil erosion and sediment control BMPs are used to control stormwater volume and flow and reduce the amount of soil particles carried from a land area and deposited elsewhere. The contractor, or an authorized subcontractor, is responsible for implementing erosion and sediment control BMPs in the ESPCP. Erosion control measures will be maintained at all times. If full implementation of the approved Plan does not provide for effective erosion control, additional erosion and sediment control measures shall be implemented to control or treat the sediment source.

Based on field conditions at the time of construction, the authorized contractor or subcontractors may adjust the locations and types of BMPs so that erosion and sedimentation are controlled to the extent practicable. If adjustments are made, then this ESPCP must be modified accordingly by an individual trained in ESPCP design. However, in no case will modifications to the ESPCP result in less stringent erosion and sediment control BMPs than specified herein. Installation and repairs of BMPs must be done in accordance with the manufacturer’s specifications and EPD requirements. Amendments/revisions to the ESPCP which have a significant effect on BMPs with a hydraulic component must be certified by the design professional. Revisions to the ESPCP must be recorded on the Record of Revisions table included at the beginning of this plan.

Factors that shall be considered in the selection of erosion and sediment control BMPs for site-specific areas may include, but not be limited to:

• Size of the area affected

• Type of proposed construction activities

• Soil type and texture

• Amount of rock present in existing soils

• Steepness and length of slope

• Amount of vegetative cover

• Proximity to watercourses or wetlands, particularly downslope from construction activities

• Sensitivity of nearby watercourses

• Date and intensity of the last major rain event

• Anticipated weather conditions and/or frozen ground

Prior to commencing field construction activities, soil erosion and sediment control BMPs must be implemented in accordance with this ESPCP and the Permit. As work progresses, the contractor or subcontractor may need to install control measures in other locations of the Project site to keep sediment from leaving the construction site. These measures will be determined in the field and any changes will be documented through a ESPCP revision. BMPs must be maintained during and after the construction activity until final stabilization is complete. Upon final stabilization of disturbed areas, temporary soil erosion and sediment control BMPs must be removed, and an NOT must be submitted to the EPD.

4.1 Temporary BMPs

The following sections discuss the temporary erosion and sediment control BMPs that may be used on the

Project site. BMPs must adhere to all EPD requirements and shall discharge to vegetated areas wherever possible. The design professional who prepared the ESPCP is to inspect the installation of the initial sediment storage requirements and perimeter control BMPs within 7 days after installation. Anticipated locations of BMPs on site are illustrated in the Manual for Erosion and Sediment Control on sheet C018 of Appendix J.

4.1.1 Delineated Disturbance Areas

Prior to commencing any construction activities at the site, the contractor must delineate and clearly mark the location of all areas not to be disturbed. Construction traffic should be restricted to designated areas to minimize compaction of the site locations where final vegetative stabilization will occur. To protect surrounding surface waters, the amount of soil-disturbing activities occurring at one time shall be limited, as undisturbed vegetated areas provide a natural means of sediment removal. Disturbance of areas on site with steep existing slopes shall be limited to the extent possible and, when necessary, must be conducted with techniques such as phasing and stabilization practices designed for steep slopes.

4.1.2 Topsoil Preservation

Existing topsoil on site must be preserved to the maximum extent practicable. Topsoil should be stripped from all areas where earth-disturbing activities are anticipated and stockpiled in the stockpile areas for future use. During final site restoration, stockpiled topsoil will be redistributed over all disturbed areas and topsoil compacted due to heavy construction traffic will be loosened and tilled. All topsoil areas will be seeded to achieve final stabilization.

4.1.3 Stabilized Construction Entrances – Co & Cr

Offsite tracking of soils must be minimized by utilizing appropriately designed temporary construction entrances and vehicle tracking controls. The amount of sediment that is transported onto a public road surface or other paved areas by construction equipment or vehicles must be minimized and cleaned up at the end of each workday. The construction entrance is located at the end of the existing access road near

Cell 2. The coordinates of this entrance, staging areas, and on-site haul road are illustrated in sheet C018 in Appendix J.

4.1.4 Silt Fence – Sd1-NS

Silt fence will be used as perimeter control on the downgradient site perimeter to intercept and retain sediment carried by sheet flow from disturbed areas and to limit sediment-laden runoff from leaving the

Project site during construction. Silt fence shall be placed perpendicular to the direction of water flow and as close to the topographic contours as possible, with the ends extending upslope. Silt fence shall also be placed downslope of all disturbed areas where sheet or rill erosion would occur and around any soil stockpiles. Silt fence must be inspected and maintained on a regular basis, and must be repaired, replaced or supplemented within 24 hours when nonfunctional or when sediment buildup reaches one-third the aboveground height of the barrier. Silt fence may be installed with an additional wire backing to provide extra strength in locations that may receive higher stormwater runoff volumes. Location and installation details for silt fence are provided in Appendix J.

4.1.5 Concrete Washout

Concrete washout areas are either a prefabricated unit or a designed measure to contain concrete washout.

These systems are typically used to contain washout water from tools and equipment and when chutes and hoppers are rinsed following concrete delivery and are implemented to reduce the discharge of pollutants through consolidation of solids and retention of liquids. Liquid and solid wastes generated from this process must be properly disposed of in compliance with NPD rules. Uncured concrete and associated liquids are highly alkaline. Without containment measures, these materials could leach into the soil and contaminate groundwater or discharge to a surface waterbody or wetland. Washout areas shall be placed on a flat gradient, contain an impermeable liner, and should be of sufficient size to contain the expected washout material. Concrete washout areas should not be placed within 100 feet of a stream, waterway, wetland, roadside ditch, or natural drainage way. The location of concrete washouts will be determined by the contractor once onsite and must be clearly marked throughout construction. The Manual for Erosion and Sediment Control in Appendix H will be updated to illustrate the selected location.

4.1.6 Dust Control

Preventative measures must be implemented during times when exposed soil is susceptible to wind erosion. In areas where bare soil is exposed, water or other dust palliatives must be applied to the soil to limit wind erosion. Precautions must be taken not to over-water and erode soils. Soil may need to be covered with tarps in areas where soil has been stockpiled for later use. In addition, appropriate speed limits should be established on the Project site to minimize the generation of dust.

4.1.7 Dewatering

Dewatering, if necessary, will be completed in such a way as to minimize turbidity, including the use of filter bags or other appropriate measures, and comply with the Permit if discharge leaves the site.

Dewatering waters will not be discharged to any wetlands or in a way that could cause erosion or scouring. Use of an energy dissipation device shall be incorporated to avoid scour and re-suspension of soil at the discharge point of the hose. The discharge of water from the site should be visibly clear in appearance.

4.1.8 Temporary Sediment Basins – Sd3

For every acre disturbed of the Project site at one time, there must be 67 cubic yards of sediment storage provided by a temporary sediment basin or equivalent controls for each common drainage location. For this Project site, a permanent detention basin will be installed instead of a temporary sedimentation basin.

The provided volume for this sediment basin is more than the required 67 cubic yards per acre outlined in the Permit. The sheet C019 of Appendix J shows the volume values for the permanent sediment basin.

4.1.9 Riprap

Riprap is broken rocks, cobbles, or boulders placed at drainage outlets to reduce the erosion from discharging stormwater. Riprap shall be placed at all drainage outlets from underdrain, drainage channels, and sedimentation basin outlets. The location of riprap placement is illustrated in C018 in Appendix J.

4.1.10 BMPs for Impaired Stream Segment

Due to the project site being within a mile of an impaired stream segment, Allen Creek, the Permit requires four BMPs to be placed where the site discharges to the creek to mitigate any further harm to the segment due to construction. These four BMPs were chosen from the list in Part III.C of the Permit. The following BMPs were chosen from the list:

• “A large sign (minimum 4 feet x 8 feet) must be posted on site by the actual start date of construction. The sign must be visible from a public roadway. The sign must identify the

Hall County – Cell 3 Construction 5 Burns & McDonnell following: (1) the construction site, (2) the permittee(s), (3) the contact person(s) along with their telephone number(s) and (4) the permittee-hosted website where the Plan can be viewed. The permittee-hosted website where the Plan can be viewed must be provided on the submitted NOI. The sign must remain on site and the plan must be available on the provided website until a NOT has been submitted.” (Part III.C.d)

• “Conduct turbidity sampling after every rain event of 0.5 inch or greater within any 24 hour period, recognizing the exceptions specified in Part IV.D.6.d. of this permit.” (Part

III.C.f)

• “Certified personnel shall conduct inspections at least twice every seven (7 calendar days and within 24 hours of the end of the storm that is 0.5 inches of rainfall or greater in accordance with Part IV.D.4.a.(3)(a)-(c) of this permit.” (Part III.C.p)

• “Install Post construction BMPs (e.g. runoff reduction BMPs) which remove 80% Tss as outlined in the Georgia Stormwater Management Manual known as the Blue Book or an equivalent or more stringent design manual.” (Part III.C.u)

The placement of these items can be seen on sheets C018, C019, and C020 of Appendix J.

4.2 Permanent BMPs

Permanent structural stormwater management practices are those that are left in place after construction is finished and the site is stabilized to manage stormwater quality, volume, and/or flow. BMPs must adhere to all EPD requirements. Anticipated locations of BMPs on site are illustrated in the Erosion and

Sediment Control Plan in sheet C020 of Appendix J.

4.2.1 Permanent Detention Basin

Permanent sedimentation basins provide storage for stormwater runoff and sediment on site. Basins provide management for stormwater quality and control the flow of stormwater leaving the site after construction is complete. A permanent detention basin with a total sediment storage capacity of 3,201 cubic yards shall be constructed on the Project site. This permanent detention basin provides adequate sedimentation capacity for the 39-acre Project site. The location of the detention basin and outfall can be seen in J. According to this ESPCP, this is a permanent detention basin because it will be left in place post NOT, however it is denoted as a temporary detention pond on the Cell 3 Construction drawings because it will eventually be removed with the future construction of Cell 5.

Hall County – Cell 3 Construction 6 Burns & McDonnell

4.2.2 Permanent Drainage Channel - Wt

Permanent stormwater drainage channels will be installed on the Project site to direct the stormwater runoff on the south and west side of the Project site towards the constructed detention basin. The location of the permanent stormwater drainage channel and more information can be seen on sheet C019 in

Appendix J.

4.2.3 Permanent Underdrain – Dn2

Underdrain aids in the movement of stormwater that has percolated into the subsurface of the Project site to areas off the Project site. Permanent underdrain shall be installed throughout the Project site prior to filling and compacting excavated soil material and installing the Cell 3 liner system. The underdrain will direct groundwater towards the wetlands to the east of the Project site or northwards to Detention Pond 2.

Placement of underdrain and more detailed information is illustrated on Figure C020 in Appendix J.

4.3 Stabilization Measures

Stabilization practices for disturbed soils are extremely important while conducting construction activities. The duration of exposed soil areas without vegetative cover or an alternative cover must be minimized to the extent practicable. Any disturbed area left exposed for a period greater than 14 days shall be stabilized with mulch or temporary seeding. Stabilization measures must be initiated immediately and be completed within 14 calendar days after the construction activity has ceased in that area. If the site is snow covered or has frozen ground conditions prior to the 14 days, stabilization measures must be initiated as soon as practicable.

The normal wetted perimeter of all temporary or permanent drainage ditches or swales draining water from or around the site must be stabilized at least 200 lineal feet from the property edge or from a discharge point to any surface water. If there is a connection with a surface water, stabilization shall be completed within 24 hours prior to the connection. All remaining portions, which construction activities have temporarily or permanently ceased, of the drainage ditches or swales must be stabilized within 14 calendar days. The following sections detail the stabilization methods that may be considered for use at this site.

4.3.1 Seeding – Ds2 & Ds3

Project personnel are responsible for labor, materials, tools, equipment, and other related items required for preparing ground, sowing of seeds, fertilizing, mulching and top dressing, and other management practices required to achieve final stabilization. It will be Project personnel’s responsibility to prevent the soil seedbed from being blown, washed, or otherwise removed from the site. The authorized contractor or

Hall County – Cell 3 Construction 7 Burns & McDonnell subcontractor must make repairs (including replacement of lost topsoil and mulch) to the seedbed preparation site in the event of heavy rain, wind, or other natural events that cause damage. There is a temporary seed mix – Ds2 – and a permanent seed mix – Ds3 – being used on site as a final stabilization measure after construction. See sheet C022 in Appendix J for the specific seed mixes to be used based on location and time of year.

4.3.2 Mulching

Mulching must be used in conjunction with seeding practices to enhance the success of vegetation establishment by providing erosion protection prior to the onset of vegetative growth.