city of fairburn wasteater treatment plant design
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Design Development Report
City of Fairburn, Georgia
2015
WASTEWATER TREATMENT AND REUSE FACILTIY PREPARED BY: JVMS ENGINEERING GROUP
JVMS ENGINEERING GROUP. | 1100 South Marietta Parkway, Marietta, Georgia 30060
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 1 of 21 July 20. 2015
TableofContents1.0 ‐ INTRODUCTION ................................................................................................................................. 3
2.0 ‐ CITY OF FAIRBURN DESCRIPTION ................................................................................................... 4
Table 2‐1 .................................................................................................................................................. 5
3.0 ‐ SITE DESCRIPTION ............................................................................................................................. 6
Figure 3‐1 ................................................................................................................................................. 6
Figure 3‐2 ................................................................................................................................................. 7
Figure 3‐3 ................................................................................................................................................. 8
Figure 3‐4 ................................................................................................................................................. 9
4.0 ‐ WASTEWATER LOADING EVALUATION ....................................................................................... 10
Figure 4‐1 ............................................................................................................................................... 10
Table 4‐1 ................................................................................................................................................ 11
Table 4‐2 ................................................................................................................................................ 12
Table 4‐3 ................................................................................................................................................ 13
5.0 ‐ TREATMENT WORKS DESCRIPTION ............................................................................................. 14
Table 5‐1 ................................................................................................................................................ 14
Figure 5‐1 ............................................................................................................................................... 15
Figure 5‐2 ............................................................................................................................................... 15
Figure 5‐3 ............................................................................................................................................... 16
Figure 5‐4 ............................................................................................................................................... 16
Figure 5‐5 ............................................................................................................................................... 17
Figure 5‐6 ............................................................................................................................................... 18
Figure 5‐7 ............................................................................................................................................... 18
6.0 ‐ REFERENCES ..................................................................................................................................... 21
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 2 of 21 July 20. 2015
Tables:
Table 2‐1 City of Fairburn, Regional Climactic Data
Table 4‐1 City of Fairburn Design Population
Table 4‐2 Anticipated Wastewater Loading
Table 4‐3 Wastewater Flow Parameters
Table 5‐1 Discharge Water & Effluent Limitations
Figures:
Figure 3‐1 Facility Layout
Figure 3‐2 General Location Map
Figure 3‐3 General Topographic Map
Figure 3‐4 Site Topographic Map
Figure 4‐1 City of Fairburn, Populations Predictions
Figure 5‐1 Typical Parshall Flume
Figure 5‐2 Typical Mechanical Bar Screen
Figure 5‐3 Vortex Grit Chamber
Figure 5‐4 Circular Primary Clarification Tank
Figure 5‐5 Completely Mixed Activated Sludge with Extended Aeration for Nitrification
Figure 5‐6 Dual Media Gravity Filter
Figure 5‐7 Typical UV Disinfection System
Appendixes:
Appendix A Preliminary Design Calculations
Appendix B Preliminary Site Drawings & Equipment Treatment System Specifications
Appendix C Environmental Informational Document
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 3 of 21 July 20. 2015
1.0‐INTRODUCTIONPresently, the City of Fairburn owns and operates a wastewater collection system but relies on Fulton
County for wastewater treatment. Due to high costs for wastewater treatment by Fulton County, as
well as concerns over future available capacity to discharge to Fulton County, the City considers it is
necessary for alternative means of wastewater disposal to be investigated. Based on this investigation, it
has been determined that a City owned and operated wastewater treatment facility would significantly
reduce the City’s reliance on Fulton County for wastewater treatment as well as reduce the City’s
wastewater treatment costs.
The Mayor and City Council through the City Administrator’s office have therefore authorized JVMS
Engineering Group to undertake this design development report to describe the proposed wastewater
treatment facility. This activity is considered an integral part of the ongoing process to create a City
owned and operated wastewater treatment and disposal facility that can provide adequate wastewater
treatment capacity for present and future needs.
It has been determined through discussion with the Georgia Department of Environmental Protection
(EPD) that the option of a conventional surface water discharge into Line Creek (located within the Flint
River Watershed) is an acceptable option. Another option for disposal of wastewater into to the nearby
Whitewater Creek was evaluated. However, due to in‐stream TMDL conditions in Whitewater Creek, a
discharge of treated wastewater effluent will not be permitted due to a number of factors including low
dissolved oxygen and high levels of nitrogen and phosphorus in the stream. Therefore, it has been
determined that a discharge into Line Creek is the preferred wastewater disposal option.
This design development report defines treatment requirements, provides design calculations, and
detailed descriptions for the wastewater treatment works and disposal facilities for the City of Fairburn,
Georgia. The proposed wastewater treatment facility will provide treatment for an average wastewater
flow of 7.73 million gallons per day (mgd). This design development report will define the following
parameters of the proposed wastewater treatment and disposal system:
Research and investigation findings
Site selection and location
Selection of effluent disposal method
Selection of treatment processes
Design of treatment works
Treatment works description
Ability for future expansion
City of Fairburn, Georgia Water Reclamation Facility
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2.0‐CITYOFFAIRBURNDESCRIPTIONThe City of Fairburn lies in south Fulton County approximately 17 miles southwest of downtown Atlanta.
Interstate 85, U.S. Highway 29, State Route 74, State Route 138, and State Route 92 traverse the City.
The Atlanta and West Point rail line operated by CSX Railroad provides rail service in the area. Hartsfield
International Airport is located approximately 10 miles northeast of Fairburn. Fairburn is developed
along a northeast to southwest ridge traversed by U.S. Highway 29 and the Atlanta and West Point rail
line. The landscape is gently rolling hills and valleys. The elevation ranges in the City from 900 to 1047
feet above sea level.
Climatic conditions prevailing in the Fairburn area includes an annual average temperature of 61.3°F, an
average winter temperature of 43.4°F, and an average summer temperature of 77.6°F. The average
annual rainfall is 50.7 inches, with an average annual number of days with rainfall events of 115.
Humidity is high and averages around 73 percent. Regional Climatic Data is shown in Table 1.
The City of Fairburn owns and maintains a water distribution system consisting of approximately 31
miles of six‐inch and larger mains. Primary water mains consist of one 12‐inch line on the east side of
I‐85 and 6 and 8 inch mains throughout the remaining portion of the system. The system contains over
300 fire hydrants. Fairburn does not have any water storage or treatment facilities. The City purchases
water from the City of Atlanta system through seven master meters that tap City of Atlanta water mains.
Currently, Fairburn purchases about 14.5 million gallons of potable water per month amounting to an
average daily consumption of approximately 0.48 million gallons per day. Approximately 1,740 water
system customers were served in 1999. Of this total, 89 percent are classified as residential and 11
percent are classified as commercial/industrial customers.
The sewerage collection system consist of a network of gravity sewers with approximately 43 miles of
pipelines ranging in size from 6‐inches to 15‐inches and approximately 631 manholes. Portions of the
sewerage system date to 1936. The system began in the central core of the City and has been expanded
many times to keep pace with growth. The City also operates three sewage pump stations within its
collection system. Approximately 1,688 wastewater collection system customers were served in 1999.
Of this total, 90 percent are classified as residential and 10 percent are classified as
commercial/industrial customers, all located within the City limits. Presently all of the wastewater
collected in the Fairburn system discharges to the Fulton County sewerage system and is ultimately
transported to the Camp Creek WWTP for treatment and disposal. The 1999 average daily wastewater
flow to Fulton County was approximately 0.423 million gallons per day (mgd). Wastewater flow and
quantities to the Fulton County sewer system are monitored via five flow monitoring stations.
Further descriptions of the City of Fairburn’s water and wastewater systems are detailed in Appendix D,
Engineering Report Wastewater System Improvements. Also addressed in Appendix D are population
and housing projections along with project financing and revenues that provide adequate background
information for the economic and social impact justification of the proposed project.
City of Fairburn, Georgia Water Reclamation Facility
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Table2‐1Regional Climactic Data
Month Precipitation Days
Precipitation (in)
Standard Deviation (in)
Temperature °F
January 12 4.75 1.75 41
February 10 4.81 1.75 44.8
March 11 5.77 2.14 53.5
April 9 4.26 1.83 61.5
May 9 4.29 1.59 69.2
June 10 3.56 1.31 76
July 12 5.01 1.52 78.8
August 9 3.66 1.39 78.1
September 8 3.42 1.60 72.7
October 7 3.05 1.66 65.3
November 8 3.86 1.80 53.1
December 10 4.33 1.85 44.5
Total 115 50.77 50.77 61.3
Source: Data obtained for the Atlanta, Georgia, Hartsfield International Airport from the National Oceanic and Atmospheric Administration, “Monthly Station Normals of Temperature, Precipitation, and Heating and Colling Degree Days 1961‐90, Georgia”
City of Fairburn, Georgia Water Reclamation Facility
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3.0‐SITEDESCRIPTIONThe site chosen for the wastewater treatment and disposal works is a 300+ acre area southwest of the
City in unincorporated Fulton and Fayette Counties, south of I‐85, and west of GA Highway 74. Present
land use of the site is unmanaged forest area and agricultural/pasture lands. The site is adjacent to
Creekwood Road on the west, Johnson/Bohanan Road to the south and the Fulton/Fayette County line
to the east. Figure 3‐1 shows an aerial of the facility and the proposed wastewater treatment plant area.
Figure3‐1Facility Layout
City of Fairburn, Georgia Water Reclamation Facility
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Figure 3‐2 shows the City of Fairburn and the surrounding areas in respect to Atlanta, GA. surrounding
areas consist of intermediate residential and unmanaged forest areas.
Figure3‐2General Location Map
Topography of the site ranges in elevation from 890 to 958 feet above sea level. Slopes on the site range
from 2% to 11%. Line Creek flows from north to south through the middle of the property, with multiple
drainage channels and intermittent streams that drain to Line Creek from the site. Additional surface
water consists of two large “farm” ponds that are approximately 3.0 and 1.5 acres, as well as limited
wetlands located in low laying areas along Line Creek.
City of Fairburn, Georgia Water Reclamation Facility
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Figure 3‐3 shows the general topography of the surrounding area. The regional flow patterns described
above is visually depicted. As ca be seen, Line Creek forms the border of Fulton and Fayette County, and
then the border between Coweta and Fayette County. Line Creek continues to south and discharges to
Flint River.
Figure3‐3Topographic Map
City of Fairburn, Georgia Water Reclamation Facility
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Figure 3‐4 shows the site specific topography. Wetlands delineation and mitigation studies for streams
and wetlands disturbing activities are being conducted by a separate consultant specializing in this field.
Wetland permitting and mitigation plans (if required) will be properly submitted to the Army Corp of
Engineers for approval and permitting prior to beginning construction. Final design and planning will
incorporate any required mitigation due to land disturbing activities.
Figure3‐4Site Topographic Map
City of Fairburn, Georgia Water Reclamation Facility
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4.0‐WASTEWATERLOADINGEVALUATIONThe following figure of population prediction is taken from Appendix D (Engineering Report, Wastewater
System Improvements) in which combined wastewater flows have been projected for the City of
Fairburn using various models of prediction (least square method, ratio method, logistic curve fitting,
and decreasing rate of increase. This figure shows the population used for the predictive model, and the
population predictions for each model in 2055:
Figure4‐1City of Fairburn Population Predictions
The figure shows the data that was used for the predictive models (historical population data), and also
has the population predictions for the four models use. The data was then analyzed and the conclusion
were drawn based on knowledge of the area, and in depth analysis of the parameters which were used
to develop the data. Table 4‐1 is a narrative description of those finding, and shows the final conclusions
which are used for the facility design.
0
20,000
40,000
60,000
80,000
100,000
120,000
1980 1990 2000 2010 2020 2030 2040 2050 2060
POPULA
TION
YEAR
Fairburn, GA Population Predictions
Historical Population Data
Least Square Method
Mathematical Method
Decreasing Rate of Increase
Ratio Method
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 11 of 21 July 20. 2015
Table4‐1City of Fairburn Design Population
Population Prediction Method
Population Prediction (2055) Comments
Final Population Selection
55,000
This population was chosen based on the relative middle ground of the data, engineering judgment, and known factors effecting the population in the area. We believe this population prediction to be conservative enough to ensure the wastewater treatment plant will be serviceable through 2055, but also not incur unnecessary cost if population growth is not achieved to this level. If population exceeds this prediction the design will allow for potential future expansion to handle the increased loading.
Least Square Method
78,467
This number was perceived as high by the group. After a closer look at the population data analyze a few items presented themselves from the data. 1. The City of Fairburn experienced a large population growth from 2000‐2001, and has steadily increased, but at a reduced rate. 2. Population was consistent in the 1990s. 3. Population increase has slowed in recent years, and area has also showed signs of slowed growth based on group's knowledge of the area.
Ratio Method 17,900
This prediction was thought by the group to not be conservative enough. It is possible that population growth could be reduced over time, but it is dangerous to design the system based on a smaller number that is so drastically different from the least square model. Additionally, data was compared to the State of Georgia population growth. Growth in this area of Georgia has been considerably higher in recent years than other parts of the State of Georgia.
Mathematical or Logistic Curve Fitting
110,026
In the opinion of the team, this method is not appropriate for the required projection. We attempted to use data across a large span of years. Smaller time frames do not take into account enough of the population trends to predict 40 years.
Decreasing Rate of Increase
45,066
This value seemed reasonable given the supplied data, and the known data for the city. The city has gone through periodic growth periods, which seemed to be marked by a decrease in growth rate due to a variety of factors. Given the value obtained we believe this is reasonable data for planning purposes.
Source: Population prediction methods by JVMS Engineering Group, source data was taken from U.S. Census and Google Population©.
As outlined above, the population selection of 55,000 people in 2055 was selected to insure the plant
will be able to handle the loadings expected in the future. In Table 4.2, this population prediction is used
to determine the loading for the plant. Additionally, a few specific industrial clients will be discharging
their production flows to the facility. That data is also included in the flow loadings for the facility. If
additional industrial clients would like to discharge their waste to the facility it will be negotiated as
needed.
City of Fairburn, Georgia Water Reclamation Facility
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Table4‐2Anticipated Wastewater Loading
2055 Design Flow Rates
Parameter Value Units
Design Population: 55,000 person
Q Factor 102 gal/day‐person
Population Q 5,610,000 gal/day
Reduction Factor 0.95 None(1)
Final Pop. QP 5.33 MGD
Peaking Factor (PF) 2.23 gal/day(2)
Peak Flow (QPPF) 11.87 MGD
Additional Flow Sources:
Industry Value Units Value Units
Pet Food 0.6 MGD 600,000 gal/day
Potato Processing 1.1 MGD 1,100,000 gal/day
Cheese 0.7 MGD 700,000 gal/day
Industry Total (QI): 2.4
Design Flows
Design Flow (QT) 7.73 MGD
Peak Flow (Qpeak) 14.27 MGD
Table 4‐2 shows the design flows expected by the plant using the population predictions discuss
previously. The peak flow and the average flows for the facility are included in this table, and were used
in the selection of the various aspects of the wastewater treatment plant.
The parameters of this facility’s discharge is dependent of the discharge point of the flow. The facility
discharges to Line Creek, which is located within the Flint River Watershed. The facility discharge is
required to maintain the limited set forth in Table 4‐3.
+
+
City of Fairburn, Georgia Water Reclamation Facility
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Table4‐3Wastewater Flow Parameters
Parameter Averaging Period Effluent Limitations
Incoming Parameters (Given For Project)
Flow (MGD) Monthly Average
Monitor & Report N/A Daily Max
BOD5 (mg/L) Monthly Average 30 261
Daily Average 40 261
CBOD5 (mg/L) Monthly Average 20
Daily Average 25
Total Suspended Solids (TSS) (mg/L)
Monthly Average 30 512
Weekly Average 45 512
pH Minimum 6
N/A Maximum 9
Ammonia (Total as N) (mg/L)
Monthly Average 0.5 30
Daily Max 0.5 30
Temperature (F)
Monthly Average
Monitor & Report N/A Minimum
Maximum
The influent flow to the Landrum Road and White Water Creek Wastewater Pumping Stations are the
proposed sources of wastewater for this project. The pump station locations can be seen in Figure 1.
The pump stations serve residential and light industrial areas of south Fulton County, including southern
portions of Union City and the City of Fairburn. Wastewater monitoring of the sewer system in the
vicinity of the pump stations has been conducted, with sample results provided in Appendix C,
Wastewater Sampling Results.
It is proposed to withdraw a nearly continuous flow from the Fulton County sewer system that is equal
to or slightly greater than the combined total of the Town of Tyrone and the City of Fairburn’s average
daily flow to the Fulton County sewer system. This maximum daily withdraw of flow from the pump
station would be 14.27 MGD. It is for this reason we include flow equalization at the wastewater
treatment facility.
Final logistics of pump station arrangements, locations, and capacities will be dependent on future
pump station monitoring and anticipated residential build out.
City of Fairburn, Georgia Water Reclamation Facility
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5.0‐TREATMENTWORKSDESCRIPTIONThe effluent requirements that must be met for discharge in the into the receiving water of Line Creek
are fairly stringent and therefore require a greater degree of treatment than typical wastewater
treatment facilities. The EPD treatment criteria for reuse water are as follows:
Table5‐1Discharge Receiving Water & Effluent Limitations
Receiving Water Line Creek
Final River Flow to Flint River
Parameter Averaging Period Effluent
Limitations
Flow (MGD) Monthly Average Monitor &
Report Daily Max
BOD5 (mg/L) Monthly Average 30
Daily Average 40
CBOD5 (mg/L) Monthly Average 20
Daily Average 25
Total Suspended Solids (TSS) (mg/L) Monthly Average 30
Weekly Average 45
pH Minimum 6
Maximum 9
Ammonia (Total as N) (mg/L)
Monthly Average 0.5
Daily Max 0.5
Temperature (F)
Monthly Average Monitor & Report
Minimum
Maximum
Based upon the effluent requirements and an understanding of the City of Fairburn’s concerns and
needs, the following treatment methods were selected and are anticipated to obtain the effluent water
quality parameters, operational requirements, cost , and future expansion desired by the City of
Fairburn;
Mechanical Bar Screen
Vortex Grit Collection
Primary Clarification/Sedimentation
Flow Equalization
Biological Process: Completely Mixed Activated Sludge w/ Nitrification
Secondary Clarification
Ammonia Stripping
City of Fairburn, Georgia Water Reclamation Facility
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Tertiary Filtration and UV Disinfection
Re‐Aeration (Step Aeration)
Flow will be measured using a Parshall Flume on the influent and effluent of the plant, and large trash or
solids will be removed from Influent flow, via mechanical bar screen (see Figure 5‐1 & Figure 5‐2).
Figure5‐1Typical Parshall Flume
Figure5‐2Typical Mechanical Bar Screen
City of Fairburn, Georgia Water Reclamation Facility
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A vortex grit chamber is located after moving for additional solid removal and flow is then diverted to
equalization tanks which are used for clarification of wastewater and normalizing flow during peak and
low flow periods. A visual depiction of a vortex grit chamber is included in Figure 5‐3.
Figure5‐3Vortex Grit Chamber
Flow will be split to three circular primary clarification tanks which will continue to polish water. All
solids removed in this portion of the treatment process will be collected and taken off‐site and disposed
of by a third party contractor as needed. A visual depiction of a circular primary clarification tank is
provided in Figure 5‐4.
Figure5‐4Circular Primary Clarification Tank
City of Fairburn, Georgia Water Reclamation Facility
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Water which continues through the treatment process is discharged from primary clarification using an
overflow weir from the top of the primary clarification tanks.
Flow is then diverted to the aeration tank for the digestion process to continue. Four aeration tanks
which share exterior walls are each 100 feet long, 25 feet wide, and 15 feet in depth. Using sample data
provided, the cell retention time (7.5 days), detention time (2.13 hours), and food to mass ration (0.36)
are all in the middle portion of the acceptable range and should allow the plant to adjust as needed. The
recycle flow back through the process is 97% and results in approximately 90,000 gal/day of wasted
sludge. The mass of the sludge 315,000 kg/day. Based on the efficiency of aeration process which will be
adjusted as‐needed once the plant will be required to provide at least 17,000,000 ft3/day of air. Since
the ammonia levels are required to be reduced significantly, extended aeration was selected to provide
additional nitrification to achieve ammonia treatment levels. Therefore, the airflow into the tank was
increased to 90 MM ft3/day, and the volume of the tanks for design is 768,000 ft3. Figure 5‐5 shows a
visual depiction of the process of completely mixed activated sludge.
Figure5‐5Completely Mixed Activated Sludge with Extended Aeration for Nitrification
The surface area required for secondary clarification was determined by analyzing the hydraulic and
solids loading of the tank. Based on preliminary design calculations (these will need to be adjusted once
laboratory data has been obtained from incoming water), is controlled by the hydraulic loading. The
secondary clarifier will be equipped with a surface skimming device, and a bottom skimming device to
insure the take operates properly overtime. Sludge removed during this process will be dewatered using
a belt press and then removed off site for final disposal by a third party contractor. The State of Georgia
is suggested and land application of sludge to be applied throughout the state. This can be investigated
further as required, but this preliminary design includes truck pick‐up by a third‐party contractor.
Flow leaving the secondary clarifier is proposed to then be disinfected using filtration and UV
disinfection. Filtration is performed by using throughs, anthracite coal, sand, and gravel to filter the
water for UV disinfection. The filtering process will in turn leave sediment within the filter beds. The
filter beds will be cleaned, via backwashing, by pumps located in the filtration area. Water which is
disinfected using UV Disinfection, must be properly filtered to remove sediment from the water.
Sediment in the water is reduces the transmittance of the water and there reduces the contact time of
City of Fairburn, Georgia Water Reclamation Facility
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the UV waves with the microorganisms and viruses within the. Refer to Figure 5‐6 for a visual depiction
of the Dual Media Gravity Filter which is proposed to be used for the treatment system.
Figure5‐6Dual Media Gravity Filter
UV disinfection is currently a proprietary field. Most (if not all) UV disinfection systems are provided by
specialty contractors. UV disinfection was selected due to the effectiveness and environmental friendly
option for discharging directly to a water body. Chlorine (or similar) disinfection leaves residual chemical
within the water over time. This residual is good for limiting regrowth of microorganisms and virus for
drinking water of the public, but reduces natural bacteria which are good for streams. When chlorine is
used for disinfection of water discharged to waterways, the chlorine effects natural bacterial growth.
Figure5‐7Typical UV Disinfection System
City of Fairburn, Georgia Water Reclamation Facility
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Additional treatment processes for the proposed facility are as follows:
Raw Sewage Fine Screening: A mechanical bar screen will be used for the removal of solids from the
influent wastewater. Influent wastewater will not likely contain large debris due to interaction with
multiple pump stations prior to treatment facility. Therefore a mechanically cleaned screen with smaller
particle flow through sizes (1/4 inch) is desired. Channel size is based on an average flow through velocity
of 1.5 ft/sec
Aerated Grit Removal: Grit removal will be through vortex type cylindrical aerated grit chambers. Grit
chamber sizing is based on a hydraulic detention time at average flow of 45 seconds.
Influent Flow Measurement: A Parshall flume will be used for incoming flow measurement. This method
of flow metering was chosen due to the full pipe flow of influent wastewater, reliability, and ease of
continuous flow recording. Influent flow will then be continuously recorded at the office using a simple
SCADA system, and an Ultrasonic Sensor will be used with the water column of the flume.
Primary Clarification: Three tanks of 56 feet in diameter will be used for ease of servicing and to
moderate peak flows.
Aeration Equipment: Blowers with diffused air will be used for the delivery of process oxygen and
mixing. Blowers and diffusers will be used for the primary biological treatment processes, sludge
digestion, aerated grit removal, operation of airlift pumps, and any additional pneumatic equipment.
Secondary Clarification: Three circular clarifiers will be used each capable of treating an average
wastewater flow 1 mgd at a hydraulic surface loading rate of 300 gpd/ft2. This provides a redundant
clarifier such that adequate clarification of the wastewater will continue with one of the clarifiers out of
service.
Effluent Flow Measurement: A parshall flume with ultrasonic level detector will be used for the
measurement of effluent flow. Effluent flow will then be continuously recorded at the office using a
simple SCADA system.
City of Fairburn, Georgia Water Reclamation Facility
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Mechanical Sludge Thickening: Sludge to the aerobic digesters from the secondary clarifiers will be
increased in solids concentration from 1.5 to 4 percent through the use of a belt thickener. By adding a
polymer to the sludge to flocculate solids together, excess water contained in the sludge can be drained
away from the solids by a permeable belt thickener.
Supervisory Control And Data Acquisition (SCADA): Limited computer monitoring and data recording of
the following treatment works is proposed:
Influent flow
Filter turbidities
Ultraviolet disinfection
Effluent flow
Backwash flow
Irrigation/reuse flow
An alarm and automatic pager system will be included to alert due to the following incidences:
Loss of power
Pumping system failure
Loss of disinfection
Turbidity violation
Solid Waste Disposal: Disposal of dewatered sludge and screenings will be to a sanitary landfill. It is
proposed to located the influent headworks and sludge dewatering system in the same building
adjacent to one another such that sludge and screenings can be disposed of in the same dumpster.
Dumpster removal will be through a commercially contracted waste hauler.
Back Up Power Source: An adequate back up power source will be supplied either through an alternative
second power grid or through an on site generator.
Maintenance Building: Within the same building as sludge handling and the headworks will be a
maintenance area for the storage of equipment and replacement parts. Required equipment consists of
tools for repairs, vehicles for spray area maintenance, and spare treatment equipment items and parts.
Offices & Laboratory: Laboratory facilities will be provided to conduct routine testing of the wastewater
processes in order to meet monitoring and permit requirements, as well as provide necessary feedback
for proper operation of the treatment works. Office areas will be provided for meetings, conducting
paper work, and for the wastewater superintendent.
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6.0‐REFERENCES1. ASCE (1959), Manual of Practice No. 36, Sewage Treatment Plant Design, A.S.C.E., NY, NY.
2. Davis, M. (2010). Water and wastewater engineering design principles and practice. New York, New York: McGraw‐Hill.
3. Davis, M., & Cornwell, D. (2013). Introduction to environmental engineering (5th ed.). New York: McGraw‐Hill.
4. Droste, Donald L (1997), Theory and Practice of Water and Wastewater Treatment, John Wiley &
Sons, Inc., NY, NY.
5. EPA (1974), Process Design Manual for Sludge Treatment and Disposal, EPA 625/1‐74‐006.
6. EPA (1978), Sludge Treatment and Disposal, EPA 625/4‐78‐012.
7. EPA (1989), Handbook Retrofitting POTW’s, EPA 625/6‐89/020.
8. EPA (1995), Process Design Manual for Surface Disposal of Sewage Sludge and Domestic Septage, EPA/625/R‐95/002
9. Great Lakes – Upper Mississippi River Board of State and Provincial Public Health and Environmental Managers, Recommended Standards for Wastewater Facilities, Health Education Services, Albany, NY.
10. Gupta, R. (2008). Hydrology and hydraulic systems (3rd ed.). Long Grove, Ill.: Waveland Press. 11. Haaken, D., Schmalz, V., Dittmar, T., & Worch, E. (n.d.). Limits of UV disinfection: UV/electrolysis
hybrid technology as a promising alternative for direct reuse of biologically treated wastewater. Journal of Water Supply: Research and Technology—AQUA, 442‐442.
12. Metcalf and Eddy, Inc. (1991), Wastewater Engineering Treatment, Disposal, and Reuse 3rd Edition,
McGraw‐Hill, NY, NY.
13. State of Georgia, Department of Natural Resources, Environmental Protection Division, Water
Protection Branch (1996), Criteria for Slow Rate Land Treatment and Urban Water Reuse, Atlanta
GA.
14. State of Georgia, Department of Natural Resources, Environmental Protection Division, Water
Protection Branch (1996), Planning for Domestic Wastewater Systems, Atlanta GA.
15. State of Georgia, Department of Natural Resources, Environmental Protection Division(2000),
Chapter 391‐3‐6 Water Quality Control, Atlanta GA.
16. Vesilind, P. Aarne (1975), Treatment and Disposal of Wastewater Sludges, Ann Arbor Science
Publishers, Inc., Ann Arbor, MICH.
17. Water Pollution Control Federation (1977), Wastewater Treatment Plant Design, Manual of Practice,
Lancaster Press, Inc., Lancaster, PA.
Sheet #
Sheet 1
Sheet 2
Sheet 3
Sheet 4
Sheet 5
Sheet 6
Wastewater Treatment Plant Flow Chart
2055 Average and Peak Flow Rate Analysis
2015 Average and Peak Flow Rate Analysis
Sedimentation Tank and Weir Design
Aeration and Digester Tank Design
Design Parameter
Brennan D. Jones, P.E.
Benjamin L. Moss
Charleston Simmons
Dr. M.A. Karim
Darrel Vaughan
Project Given's & Effluent Guidelines
Table of Contents
Fairburn, Georgia Wastewater Treatment Plant DesignKennesaw State University
Atlanta, Georgia
Environmental Engineering DesignPrepared For:
Prepared By:
Sheet 1 ‐
Project Givens and Effluent Parameters
Fairburn, GA Wastewater Treatment
Plant Design
Kennesaw State University
Department of Civil Engineering
Receiving Water Line Creek
Final River Flow to Flint River
Parameter Averaging Period Effluent Limitations
Incoming
Parameters
(Given For Project)
2015 Calculated Loading
Fairburn, GA Plant
2055 Calculated Loading
Fairburn, GA Plant Comments
Monthly Average 114 232Daily Max 6 14
Monthly Average 30 261 248,212 480,023,088
Daily Average 40 261 31.66 64.39
Monthly Average 20
Daily Average 25
Monthly Average 30 512 486,915 941,654,488
Weekly Average 45 512 22,632 51,127
Minimum 6 7 7Maximum 9 7 7
Monthly Average 0.5 30 28,530 55,175,068Daily Max 0.5 30 1,578 3,565
Monthly Average 20 20
Minimum 20 20Maximum 20 20
N/A
Not given, assumed based on typical conditions will
adjust as necessary.
Total Suspended Solids (TSS) (mg/L)
Monitor & Report
Not given, assumed based on typical conditions will
adjust as necessary.
N/A
N/A
Monitor & ReportFlow (MGD)
BOD5 (mg/L)
CBOD5 (mg/L)
pH
Temperature (F)
Ammonia (Total as N) (mg/L)
Page 2 of 9
Sheet 2 ‐
Project Givens and Effluent Parameters
Fairburn, GA Wastewater Treatment
Plant Design
Kennesaw State University
Department of Civil Engineering
Page 3 of 9
Sheet 3 ‐
2055 Average Peak Flow Rate
Fairburn, GA Wastewater Treatment
Plant Design
Kennesaw State University
Department of Civil Engineering
Parameter Value Units
Design Population: 55,000 person Based on population from 2055 used by the group.
Q Factor 102 gal/day‐person
Population Q 5,610,000 gal/day
Reducton Factor 0.95 None(1)
Final Pop. QP 5.33 MGD
Peaking Factor (PF) 2.23 gal/day(2)
Peak Flow (QPPF) 11.87 MGD
Industry Value Units Value Units
Pet Food 0.6 MGD 600,000 gal/day
Potato Processing 1.1 MGD 1,100,000 gal/day
Cheese 0.7 MGD 700,000 gal/day
Industry Total (QI): 2.4
Design Flow (QT) 7.73 MGD
Peak Flow (Qpeak) 14.27 MGD
Additional Flow Sources:
Design Flows
2055 Design Flow Rates
+
+
Page 4 of 9
Sheet 4 ‐
2015 Average Peak Flow Rate
Fairburn, GA Wastewater Treatment
Plant Design
Kennesaw State University
Department of Civil Engineering
Parameter Value Units
Design Population: 14,458 person Based on decreasing rate of increase population for 2015
Q Factor 102 gal/day‐person
Population Q 1,474,716 gal/day
Reducton Factor 0.95 None(1)
Final Pop. QP 1.40 MGD
Peaking Factor (PF) 2.79 gal/day(2)
Peak Flow (QPPF) 3.91 MGD
Industry Value Units Value Units
Pet Food 0.6 MGD 600,000 gal/day
Potato Processing 1.1 MGD 1,100,000 gal/day
Cheese 0.7 MGD 700,000 gal/day
Industry Total (QI): 2.4
Design Flow (QT) 3.80 MGD
Peak Flow (Qpeak) 6.31 MGD
Additional Flow Sources:
Design Flows
2012 Design Flow Rates
+
+
Page 5 of 9
Sheet 5 ‐
Sedimentation Tank Weir DesignFairburn, GA Wastewater Treatment
Plant Design
Kennesaw State University
Department of Civil Engineering
Givens: Value Units
Design Flow (QT) 7.73 MGD
Peak Flow (Qpeak) 14.27 MGD
DTavg (based on average) 2 hr
DTpeak (based on peak) 1.5 hr
ADF Overflow Rate 1,000 g/ft2‐day
Peak Overflow Rate 2,500 g/ft2‐day
Weir Loading Range Min 10,000 g/ft‐day
Weir Loading Range Max 40,000 g/ft‐day
Conversion Factors Value
seconds/minute 60
minute/hour 60
hours/day 24
days/week 7
days/month 31
days/year 365
gal/ft3
7.48
Parameter Value Units
DTavg Volume Required (ft3) 86,113 ft3
DTpeak Volume Required (ft3) 119,195 ft3
Volume DTdesign (max of above) 119,195 ft3
Suface Overflow Rate (avg) 7,730 ft2
Surface Overflow Rate (peak) 5,706 ft2
Surface Overflow Rate (Design) 7,730 ft2
Assumed Number of Tanks 3 tanks
Tank Suface Area (per tank) 2,577 ft2
Circular Tank (Diameter) 57 ft
Design Diameter 60 ft
Design Surface Area 2,826 ft2
Volume Per Tank 39,732 ft3
Required Depth 14 ft
Design Depth Per Tank 15 ft
Design Volume Per Tank 42,390 ft3
Design Volume Total 127,170 ft3
Design Volume Total 951,232 gallons
Check DTavg 0.123 days
Check DTavg 2.954 hours
Check GOOD Check GOOD or ‐‐> ADJUST
Check DTpeak 0.067 days
Check DTpeak 1.600 hours
Check GOOD Check GOOD or ‐‐> ADJUST
Primary Clarifier Calculations
Page 6 of 9
Sheet 5 ‐
Sedimentation Tank Weir DesignFairburn, GA Wastewater Treatment
Plant Design
Kennesaw State University
Department of Civil Engineering
Parameter Value Unit
Weir Length 60 ft
Circumferance 188.4 ft
How many tanks 3 tanks
Total Weir Length 565 ft
Qavg Weir Loading 13,676 g/day‐ft
Weir Loading Range Check? GOOD g/day‐ft GOOD or ‐‐> ADJUST
Qpeak Weir Loading 25,239 g/day‐ft
Weir Loading Range Check? GOOD g/day‐ft GOOD or ‐‐> ADJUST
Parameter Value Unit
Weir Length 56 ft
Circumferance 175.84 ft
How many tanks 3 tanks
Total Weir Length 528 ft
Qavg Weir Loading 14,653 g/day‐ft
Weir Loading Range Check? GOOD g/day‐ft GOOD or ‐‐> ADJUST
Qpeak Weir Loading 27,042 g/day‐ft
Weir Loading Range Check? GOOD g/day‐ft GOOD or ‐‐> ADJUST
Parameter Value Unit
Est. Sludge Wasted Min 0.25 %
Est. Sludge Wasted Max 0.35 %
Est. Primary Sludge Volume 2,705,325 g/d
Primary Clar. Sludge Conc. 0.02 %
Thickener Sludge Conc. 0.07 %
BOD Removal Rate 0.33 %
SS Removal 0.53 %
BOD5 Influent 261 mg/L
SS Influent 512 mg/L
BOD5 ‐ Eff Sed Tank 175 mg/L
SSEff Sed Tank 241 mg/L
Ammoniaeff sed tank 30 mg/L
Weir Loading Check
Design Weir Loading Calculations
Sludge & Effluent Parameters
Page 7 of 9
Sheet 6
Aeration Tank and Digester Design
Fairburn, GA Wastewater Treatment
Plant Design
Kennesaw State University
Department of Civil Engineering
Parameter Value Units
BOD5 30 mg/L
SS 30 mg/L
Parameter Value Units
BOD5 of SS 50% %
L 4 Ratio
W 1 Ratio
Depthmax 5 m
Lengthmax 25 m
Parameter Value Units
Q 14,653 gal/day
S0 (BOD5) 175 mg/L
Ks 60 mg/L BOD
μm 3.0 d‐1
kd 0.1 d‐1
Y 0.6 mg VSS/mg BODX (MLVSS) 2,000 mg/L Adjust
Cf (MLSS correction factor) 1.20 MLVSS
T (Temperature) 25 °C
Parameter Value Units
S (BOD5 in aeration tank) 15.00 mg/L
Oc (SRT) 2.00 days
Adjust Oc (SRT) until ‐‐‐> 0.00 = Zero
to 0.080 days
to 1.92 hours
Vrequired 157 ft3
Parameter Value Units
Lengthdesign (Aeration Tank) 10 ft Req. >= X
Widthdesign (Aeration Tank) 3 ft No Req.
Depthdesign (Aeration Tank) 4 ft Req. <= X
Number of Tanksdesign 2 tank
Vdesign 200 ft OK
Parameter Value Units
F/M 0.86 mg/mg*days IN RANGE
Red Cells ‐ Value out of range [Further Adjustments Are Needed]
Adjust Oc until
bottom cell =0
Food To Organism Ratio (F/M) Calcuation
Aeration Tank Design
Adjust these
values as needed.
These are
assumed using
the text book
Primary Effluent Concentrations
Tank Sizing Calcuations
Tank Sizing Calcuations
Effluent Standards
Completely Mixed Activated Sludge System
Directions: This spreadsheet has been compiled to assist in the
determination of aeration and sludge handling parameters for the
design of actived sludge secondary treatment.
Yellow Cells ‐ Update Numbers as needed with design parameters
Green Cells ‐ Important Values for Treatment Construction (checks)
Page 8 of 9
Sheet 6
Aeration Tank and Digester Design
Fairburn, GA Wastewater Treatment
Plant Design
Kennesaw State University
Department of Civil Engineering
Parameter Value Units
Q 14,653 gal/day
Q 1,959 ft3/day
(X) MLVSS 2.00 g/L
Cf (MLSS Fraction) 1.20 None
(X') MLSS 1.67 g/L
Vdesign 200 ft3
Oc (SRT) 2.0 days
Xe 0.03 g/L
SVI 210 g/L Use Table
T 25 °C
Xr' (estimated) 4.76 g/L
Xr (estimated) 3.97 g/L
Qw (waste flow) 42 ft3/day
Qr (recycle flow) 972 ft3/day
Qw (waste flow) 315 gal/day
Qr (recycle flow) 7,268 gal/day
Yobs (observed yield) 0.50 kg VSS/kg BOD5
Px (sludge produced) 1,173 kg/d of VSS
MLSS Increase 1,408 kg/d
SSlost in effluent 1.00 kg/d
Mw 1,407 kg/d
Parameter Value Units
ƒ (BOD5/BODu) 68% %
η (O2 transfer efficienty) 10% %
Mo2 (mass of oxygen) 1,782 kg/day of O2
ρ(air) 1.185 kg/m3
ρ(air) 0.033 kg/ft3
O2 in air 23.2 %
V(air) 23,294 ft3/d
Sludge Calculations & Design
Oxygen Demand Calcuations
Page 9 of 9
WATER RECLAMATIONFACILITY
FOR
CITY OF FAIRBURN, GEORGIANPDES NO. GA0000000
JULY 21, 2015
1100 SOUTH MARIETTA PARKWAY, MARIETTA, GEORGIA 30060
( P ) 678-915-3026 ( F ) 678-915-5527
JVMS ENGINEERING GROUP
1
G-001
X
SITE LOCATION MAP
C-002
C-001PROCESS FLOW DIAGRAM & HYDRAULIC PROFILE
CIVIL
006
004
PROJECT LOCATION MAP, INDEX OF DRAWINGS AND GENERAL NOTES G-002002
G-001COVER SHEET001
GENERAL
DWG. NO.DRAWING TITLESHEET NO.
VICINITY MAP
STATE MAP
PLANT LAYOUT
SITE PLAN C-003
005
IF YOU DIG GEORGIA...
CALL US FIRST!
1-800-282-7411
UTILITIES PROTECTION CENTER
IT'S THE LAW
GENERAL ABBREVIATIONS G-003003
013
008
007
010
012
011
009
ARCHITECTURAL
MECHANICAL
M-002
M-001
M-003
PLANT HEADWORKS
PRIMARY CLARIFIERS
CROM EQUALIZATION TANKS
AERATION BASINS M-004
M-006
M-005
M-007
SECONDARY CLARIFIERS
RAS / WAS PUMP STATION & DETAILS
DIGESTERS
DETAILS
STRUCTURAL
ELECTRICAL
FAIRBURN, GA
PROPOSED WATERRECLAMATION FACILITY SITE
CITY OF FAIRBURN, GEORGIA
2 OF 17
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FILTERS
THICKENERS
D-001016 SITE DETAILS
D-002017 PLANT DRAIN PUMP STATION DETAILS
IF YOU DIG GEORGIA...
CALL US FIRST!
1-800-282-7411
UTILITIES PROTECTION CENTER
IT'S THE LAW
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60' DIAMETER PRIMARY CLARIFIERS
(2 TYPICAL; 1 FUTURE)
SPLITTER BOX
100' X 25' AERATION BASINS
(6 TYPICAL; 2 FUTURE)
DIGESTERS
SPLITTER BOX
100' DIAMETER SECONDARY CLARIFIERS
(3 TYPICAL; 1 FUTURE)
RAS/WAS PUMP STATION
FILTERS
EFFLUENT METERING CHANNEL
WITH PARSHALL FLUME
AND CASCADE AERATOR
150' CROM EQUALIZATION TANKS
(2 TYPICAL)
RAS PUMP STATION
BLOWER BUILDING FOR AERATION BASINS
WITH BELT PRESS THICKENER ROOM
EXISTING BUILDINGS ON CITY PROPERTY
TO BE DEMOLISHED AND REMOVED
CONTROL BUILDING AND
LABORATORY
EQ TANK BLOWER BUILDING
42-INCH Ø RCP
OUTFALL PIPE
HEADWORKS:
INFLUENT METERING CHANNEL
PERFORATED CHANNEL SCREENS
VORTEX GRIT CHAMBERS
FAIR
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( P ) 678-915-3026 ( F ) 678-915-5527
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(2 TYPICAL; 1 FUTURE)
SPLITTER BOX
SPLITTER BOX
EFFLUENT METERING CHANNEL
WITH PARSHALL FLUME
AND CASCADE AERATOR
42-INCH Ø RCP
OUTFALL PIPE
INFLUENT FORCEMAIN
FROM OFFSITE PUMP STATION
HEADWORKS:
INFLUENT METERING CHANNEL
PERFORATED CHANNEL SCREENS
VORTEX GRIT CHAMBERS
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( P ) 678-915-3026 ( F ) 678-915-5527
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0 40' 80'
HEADWORKS (PLAN VIEW)
SCALE 1/4" = 1'
HEADWORKS (SECTION CUT)
SCALE 1/4" = 1'
INFLUENT METERING CHANNEL
INFLUENT FORCEMAIN DISCHARGE
FROM OFFSITE PUMP STATION
PARSHALL FLUME
SCREENING CHANNEL(S)
UPSTREAM SLUICE GATE
W/ ELECTRONIC ACTUATORS
(TYPICAL 2)
PARKSON AQUA-GUARD PF
PERFORATED PLATE CHANNEL SCREEN
(TYPICAL 2)
SCREENINGS CONVEYOR
DOWNSTREAM SLUICE GATE
W/ ELECTRONIC ACTUATORS
(TYPICAL 5)
VORTEX GRIT CHAMBER
(TYPICAL 2)
PARKSON AQUA-GUARD PF
PERFORATED PLATE CHANNEL SCREEN
(TYPICAL 2)
SCREENINGS
CONVEYOR
PARSHALL FLUME
UPSTREAM SLUICE GATE
W/ ELECTRONIC ACTUATORS
(TYPICAL 2)
DOWNSTREAM SLUICE GATE
W/ ELECTRONIC ACTUATORS
(TYPICAL 5)
VORTEX GRIT CHAMBER
(TYPICAL 2)
CONTROL WEIR
FAIR
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M-001
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( P ) 678-915-3026 ( F ) 678-915-5527
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MARIETTA, G
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( P ) 678-915-3026 ( F ) 678-915-5527
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SLU
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Environmental Informational Document City of Fairburn, Georgia
2015
WASTEWATER TREAMENT AND REUSE FACILITY PREPARED BY: JVMS ENGINEERING GROUP
JVMS ENGINEERING GROUP | 1100 South Marietta Parkway, Marietta, Georgia
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 1 of 10 July 20, 2015
Table of Contents 1.0 - PURPOSE AND SCOPE ............................................................................................................................................ 2 2.0 - ENVIRONMENTAL CATEGORY REVIEW .................................................................................................................. 3
2.1 Wetlands: ..................................................................................................................................................... 3 2.2 Flood Plain/River Corridor ............................................................................................................................ 3 2.3 Water Supply: ............................................................................................................................................... 3 2.4 Water Resources: ......................................................................................................................................... 4 2.5 Groundwater Recharge Area: ...................................................................................................................... 4 2.6 Storm Water: ................................................................................................................................................ 4 2.7 Waste Water: ............................................................................................................................................... 4 2.8 Air Quality: ................................................................................................................................................... 4 2.9 Solid Wastes: ................................................................................................................................................ 4 2.10 Soil Stability/Erodibility: ........................................................................................................................... 4 2.11 Protected Mountains: .............................................................................................................................. 4 2.12 Protected Species: ................................................................................................................................... 5 2.13 Critical Habitats: ........................................................................................................................................... 5 2.14 Historical: ..................................................................................................................................................... 5 2.15 Archeological: ............................................................................................................................................... 5 2.16 Parks/Recreation: .................................................................................................................................... 5 2.17 Energy Supplies: ........................................................................................................................................... 5 2.18 Beaches: ................................................................................................................................................... 5 2.19 Dunes: ...................................................................................................................................................... 5 2.20 Shoreline: ..................................................................................................................................................... 5 2.21 Estuary: .................................................................................................................................................... 5 2.22 Forest Land: ............................................................................................................................................. 5 2.23 Barrier Island ................................................................................................................................................ 5 2.24 Aquatic Life/Trout Streams: ..................................................................................................................... 6 22.5 Noise: ....................................................................................................................................................... 6 2.26 Farm Land: ............................................................................................................................................... 6 2.27 Site Safety: ................................................................................................................................................... 6 2.28 Energy Use: .............................................................................................................................................. 6 2.29 Historical & Wetland Studies............................................................................................................................. 6 TABLE 2-1 .................................................................................................................................................................. 7
3.0 - FINANCIAL IMPACT ............................................................................................................................................... 8 4.0 - ALTERNATIVES TO THE PROJECT .......................................................................................................................... 9 5.0 - MINIMIZING ADVERSE IMPACTS ......................................................................................................................... 10
5.1 - Wetlands: ........................................................................................................................................................ 10 5.2 - Flood Plain/River Corridor: .............................................................................................................................. 10 5.3 - Groundwater Recharge Area: ......................................................................................................................... 10 5.4 - Solid Waste: .................................................................................................................................................... 10 5.5 - Soil Stability/Erodibility: .................................................................................................................................. 10 5.6 - Farm Land: ....................................................................................................................................................... 10
Appendixes: Appendix A Initial Findings of Ecological Studies Appendix B Initial Finding of Cultural Resources Studies
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 2 of 10 July 20, 2015
1.0 - PURPOSE AND SCOPE The City of Fairburn is preparing to construct a 7.8 million gallon per day (mgd), wastewater treatment and reuse facility to serve the City of Fairburn. As part of the planning for the project, it is necessary to consider the environmental impact of the proposed project. This document is intended to discuss the environmental considerations of the project and explain alternatives or mitigation measures that may minimize the adverse impact of the project.
The project consists of a wastewater treatment and disposal works on a ±300 acre site located southwest of the City of Fairburn, south of I-85. The proposed site is located in unincorporated Fulton and Fayette County. Approximately 2 acres or the site is located in Fayette County and will remain undeveloped. The remaining area of 298 acres is located in Fulton County. The site is adjacent to Creekwood Road on the west, Johnson/Bohanan Road to the south and the Fulton/Fayette County line to the east. Location and site maps are provided in Appendix A depicting the site and surrounding areas. (Present land use of the site is unmanaged forest area and agricultural/pasture lands.) Line Creek Runs through the selected site and poses various environmental concerns. Treatment of the wastewater will be to the limits established by Georgia Environmental Protection Division.
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 3 of 10 July 20, 2015
2.0 - ENVIRONMENTAL CATEGORY REVIEW There are numerous environmental considerations that may affect a project and each area’s impact from the specific project must be evaluated. Wetlands mitigation and drainage channel improvements will be an integral portion of this project to insure minimal long-term impact. The environmental areas on the attached Table 1, Environmental Check List, have been reviewed for the project and affected areas to be impacted are as follows:
• Wetlands
• Flood Plain/River Corridor
• Waste Water
• Groundwater Recharge Area
• Solid Waste
• Soil Stability/Erodibility
• Farm Land
• Energy Supplies
• Energy Use
2.1 Wetlands: Wetlands will be disturbed during the construction period for the installation of the irrigation system. Also various small farm ponds and intermittent streams will be drained or diverted due to this project. Long-term effects of the project will be to retain an equal or greater area of wetlands than currently exist at the site. Refer to Appendix C for a description of impacts. Wetland permitting through the Corps of Engineers is being prepared.
2.2 Flood Plain/River Corridor:
Project construction will occur within the 100-year flood plain. No permanent structures, treatment works, or irrigation equipment will be located within the 100-year flood plain. Long-term effects will be to provide channel improvements for the streams that are affected either by relocation or consolidation, as well as retain adequate flood plain area. Stream buffer variances will be applied for as needed based on final facility design.
2.3 Water Supply: There will be no effect to the existing water supply in the area other than to provide potable water service for use by the employees at the control building. Internal reuse water will be used for all non-potable purposes.
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 4 of 10 July 20, 2015
2.4 Water Resources: There will be no effect to the surrounding water resources other than the removal of cattle from the site, where they currently have access to the Line Creek.
2.5 Groundwater Recharge Area: This project will have a long-term impact on the Groundwater Recharge Area directly within the selected site. The affect of the project will be to increase the groundwater recharge rate directly within the selected site. Groundwater quality will not be adversely affected.
2.6 Storm Water: Gravel roads and open basins will be used such as to limit the amount of storm water runoff. No irrigation will occur along with a precipitation event that would cause water runoff of irrigation water. As mentioned previously the existing cattle will be removed from the site, these cattle have an adverse effect on storm water runoff quality.
2.7 Waste Water: Since all of Fairburn’s wastewater is presently treated by Fulton County, this project will in effect direct up to 1 mgd of wastewater away from the Fulton County, Camp Creek WWTP. The Camp Creek facility currently discharges treated effluent to the Chattahoochee River. This project will therefore eliminate the direct surface water discharge of treated effluent (that is treated to a lower standard than that which is proposed) from the Chattahoochee River. This project will also provide an additional treatment capacity of 1 mgd at the Camp Creek Facility.
2.8 Air Quality: Offensive odors created at the facility headworks will be contained inside of a building. There will be no incineration of materials or use of gases that would degrade air quality.
2.9 Solid Wastes: Solid Wastes will be increased due to the project. Solids will be treated and removed from the wastewater stream and disposed of at an EPD approved sanitary landfill. Solid waste created by the proposed wastewater treatment facility will be from the sludge stabilization and dewatering process, as well as screenings from the raw wastewater influent. Solid waste created is estimated at approximately 1,500 tons per year.
2.10 Soil Stability/Erodibility: Soil stability and erodibility will be influenced by the project only during the construction activity for the facilities. Total site area is estimated at 300 acres with approximately 15 acres being disturbed for the construction of the treatment works, and approximately 70,000 ft of trenched irrigation piping being installed for the irrigation system. Long-term effects of the project will be channel improvements along Line Creek and it’s tributaries, and improved permanent vegetative soil stabilization.
2.11 Protected Mountains: There are no protected mountains in the vicinity of this project.
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 5 of 10 July 20, 2015
2.12 Protected Species: No protected species were identified on the project site. Refer to Appendix A for findings of the ecological studies.
2.13 Critical Habitats: No critical habitats were identified on the project site. Refer to Appendix A for findings of the ecological studies.
2.14 Historical: No historical areas of significance were identified in the vicinity of the project site. Refer to Appendix B for findings of the cultural resources studies.
2.15 Archeological: The site does not contain any significant archeological ruins or artifacts. Refer to Appendix B for findings of the cultural resources studies.
2.16 Parks/Recreation: There area no parks or recreational areas in the vicinity of this project. Portions of the facility may be used as recreational facilities dependent on final design.
2.17 Energy Supplies: Electrical power consumption will be increased due to this project. Electrical power is required to run the mechanical components of the treatment and irrigation works.
2.18 Beaches: There are no beaches in the vicinity of this project.
2.19 Dunes: There are no dunes in the vicinity of this project.
2.20 Shoreline: There is no shoreline in the vicinity of this project.
2.21 Estuary: There are no estuaries in the vicinity of this project.
2.22 Forest Land: Existing forests on the site will remain except for limited clearing of lanes for installation of irrigation systems. Successional forest growth will then be allowed to continue following construction.
2.23 Barrier Island:
There are no barrier islands in the vicinity of the project.
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 6 of 10 July 20, 2015
2.24 Aquatic Life/Trout Streams: There will be no effect to aquatic life or trout streams since there will be no runoff of irrigation water from the site. As mentioned previously the existing cattle will be removed from the site, these cattle have an adverse effect on down stream surface water quality.
22.5 Noise: Noise on the site will be limited. The majority of noise causing mechanical equipment associated with the project is blowers to provide process air for wastewater treatment. These blowers will be housed inside of a weather and sound insulated control building. Additional noises created by the project would be the additional traffic created by the project and usual noise created by the manpower required for facility operations.
2.26 Farm Land: Existing farmland will be displaced due to this project. Existing farmland consists of pasturelands and farm ponds for the grazing and watering of beef cattle. Farmland usage of the site consists of approximately 110 acres, which abut Line Creek. Long-term effects of the farmland displacement will be the improvement of the Line Creek surface water quality by removing the cattle (which currently have access to the creek and impact the storm water runoff quality to the creek) from the site.
2.27 Site Safety: The treatment works and storage basins will be fenced off and access limited to operations staff and visitors under direct supervision of the staff. All treatment works and buildings will be constructed to OSHA standards.
2.28 Energy Use: Electrical power consumption will be increased due to this project. Electrical power is required to run the mechanical components of the treatment and irrigation works.
2.29 Historical & Wetland Studies In conjunction with U.S. Army Corps of Engineers wetland permitting, wetlands and protected species surveys of the site have been conducted to determine if any impact exists. In addition, historic and archeological surveys and studies have also been conducted for the site. Any impacts to the wetlands, protected species, critical habitats, historical sites, and archeological sites addressed in the attached Appendixes A and B, Initial Findings of Ecological Studies and Initial Findings of Cultural Resources Studies.
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 7 of 10 July 20, 2015
TABLE 2-1 ENVIRONMENTAL CHECKLIST
GEORGIA IS AREA AFFECTED? IF AFFECTED, HOW SEVERE?
AREA/CATEGORY NO YES UNKNOWN MINOR MEDIAN MAJOR UNKNOWN
1. Wetlands X X
2. Flood Plain/River Corridor X X
3. Water Supply X
4. Water Resources X
5. Groundwater Recharge Area X X
6. Storm Water X
7. Waste Water X X
8. Air Quality X
9. Solid Wastes X X
10. Soil Stability/Erodibility X X
11. Protected Mountains X
12. Protected Species X
13. Critical Habitats X
14. Historical X
15. Archeological X
16. Parks/Recreation X
17. Energy Supplies X X
18. Beaches X
19. Dunes X
20. Shoreline X
21. Estuary X
22. Forest Land X
23. Barrier Island X
24. Aquatic Life/Trout Streams X
25. Noise X
26. Farm Land X X
27. Site Safety X
28. Energy Use X X
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 8 of 10 July 20, 2015
3.0 - FINANCIAL IMPACT The project capital cost for construction at startup will be approximately $XX,000,000. This cost will be offset by the expanded opportunity for residential and commercial development in the surrounding communities of Fairburn. Wastewater treatment will provide an opportunity for the City of Fairburn to keep pace with the growth seen throughout the metro Atlanta area. Without the ability to provide adequate sewerage service and wastewater treatment at a reasonable cost, development in these communities would be limited. This project will be a positive method of attaining community growth while retaining over 100 acres of “green space” on the site.
The project will be funded using revenue bonds from the City of Fairburn. Annual operation and maintenance costs for the facility is expected to be in the range of $1,500,000. The wastewater treatment facility will employ approximately 5 full time operators and 16 support staff employees.
The actual cost of wastewater treatment at the proposed facility will be less than the cost to treat the wastewater by Fulton County.
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 9 of 10 July 20, 2015
4.0 - ALTERNATIVES TO THE PROJECT The project generally consists of properly treating and disposing of 7.8 MGD wastewater flow that is currently created regardless of the proposed project.
If the City elects to take no action on the project, wastewater treatment of the 7.8 MGD will still continue at the Fulton County Camp Creek wastewater treatment facility. However, the City of Fairburn will potentially be paying excessive rates for wastewater treatment and may not be able to expand discharge capacity to Fulton County if no more treatment capacity remains. It is estimated that the annual treatment costs would be higher if the wastewater were treated by Fulton County rather than treated by Fairburn.
Alternatives for the proposed project are as follows:
1. Do nothing and continue to pay Fulton County for treatment of wastewater. This option is not financially favorable for the City of Fairburn since treatment fees would be higher than a City owned and operated facility, as well as limiting the potential for City development due to uncertainties of having adequate future wastewater disposal capacity.
2. Provide a surface water discharge facility. Unfortunately no assimilative capacity remains in Line Creek for the permitting of a surface water discharge. The only other nearby surface water that has potential for surface water discharge is Whitewater Creek. This option cannot be fully evaluated by EPD until such time as a determination of Total Maximum Daily Limits (TMDL) has been conducted. Due to time constraints and uncertainties related to the allowable TMDL in Whitewater Creek, this alternative is not a feasible alternative at this time.
3. Provide an alternative site for wastewater disposal. The option of an alternative discharge site is made extremely difficult due to the fact that very little contiguous undeveloped land exists within the area. The proposed facility is located such that it is located along an existing sewerage collection system that presently serves Fairburn and unincorporated Fulton County south of Fairburn. Very little wastewater collection infrastructure (i.e. pipelines, pump stations, etc.) would be required in addition to construction of the facility at the proposed location. The wastewater collection system is served by two wastewater pump stations that ultimately transfer the wastewater to the Fulton County Camp Creek WWTF. No other contiguous undeveloped area exists near the City that would have adequate wastewater flows.
City of Fairburn, Georgia Water Reclamation Facility
JVMS Engineering Group Page 10 of 10 July 20, 2015
5.0 - MINIMIZING ADVERSE IMPACTS The environmental considerations presented in this report show multiple categories that will impact the environment. The following practices and construction techniques will be imposed such that environmental impacts are minimized:
5.1 - Wetlands: A qualified consultant will conduct wetlands delineation, protected species studies, and cultural resources studies for the proposed site. Wetland permitting documents will be submitted to the U.S. Army Corps of Engineers for review and approval prior to construction.
5.2 - Flood Plain/River Corridor: No permanent alteration of the 100-year flood plan will occur as a result of the proposed project. No permanent structure or equipment will remain within the 100-year flood plain.
5.3 - Groundwater Recharge Area: Quality of the increased groundwater will not be adversely affected due to the quality of effluent treatment that is proposed as well as the natural improvements to the water due to atmospheric spray irrigation, topsoil interaction, and relatively long detention time prior to water reaching a stabilized groundwater table.
5.4 - Solid Waste: The estimated amount of solid waste created can be adequately disposed of at an EPD approved sanitary landfill.
5.5 - Soil Stability/Erodibility: While construction will disturb the soils in the area, the work will include temporary erosion control, BMP’s, and restoration and stabilization of completed surfaces at the end of construction. The mitigation measures proposed to reduce the impact of the soil stability consist of requiring the construction contractor to comply with the Georgia Erosion and Sedimentation Control Act and to provide the site with permanent vegetation upon completion of the work. The contractor must install erosion control measures as necessary to prevent soils being displaced from the site. Such measures typically include silt control fences, construction exit pads, temporary mulching, temporary vegetation, and stone check dams.
5.6 - Farm Land: Approximately 100 acres of the site presently being used for agriculture (beef cattle) will be eliminated by the proposed project. This will have a positive impact on Line Creek by removing the cattle (and their fecal matter) from the site and Line Creek. Adequate financial reimbursement has been given for the displacement of the existing pasturelands. Also the landowner has been given an extended period of time in which the livestock can be transferred to another pasture area.
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