WQ0021828_Renewal (Application)_20221007

Initial Review
Reviewer Thornburg, Nathaniel D
Is this submittal an application? (Excluding additional information.)*
Yes No
Permit Number (IR) * WQ0021828
ApplicantlPermittee Orange Water and Sewer Authority
ApplicantlPermittee Address 400 Jones Ferry Road; Carrboro, N.C. 27510-2001
Is the owner in BIMS? Yes No Is the facility in BIMS? Yes No
Owner Type
Facility Name
County
Fee Category Minor
Is this a complete application?*
Yes No
Signature Authority
Signature Authority Title
Signature Authority Email
Document Type (if non -application)
Email Notifications
County
OWASA Class A Residuals Program
Orange
Does this need review by the hydrogeologist? * Yes No
Regional Office
CO Reviewer
Admin Reviewer
Fee Amount
Complete App Date
$0
Below list any additional email address that need notification about a new project.
... ... ..
Email Address
Comments to be added to email notfication
Comments for Admin
Comments for RO

Comments for Reviewer
Comments for Applicant

Submittal Form
Project Contact Information
Please provide information on the person to be contacted by NDB Staff regarding electronic submittal, confirmation of receipt, and other correspondence.
............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Name* Rob Willcox
Email Address*
[e-mail]
Project Information
Application/Document Type*
New (Fee Required)
Modification - Major (Fee Required)
Renewal with Major Modification (Fee
Required)
Annual Report
Additional Information
Other
Phone Number*
3363399128
Modification - Minor
Renewal
GW-59, NDMR, NDMLR, NDAR-1,
N DAR-2
Residual Annual Report
Change of Ownership
We no longer accept these monitoring reports through this portal. Please click on the link below and it will take you to the correct form.
hftps://edocs.deq.nc.gov/Forms/NonDischarge_Monitoring_Report
Permit Type: *
Wastewater Irrigation
Other Wastewater
Closed -Loop Recycle
Single -Family Residence Wastewater
Irrigation
Permit Number: *
WQ0021828
Has Current Existing permit number
Applicant/Permittee*
Orange Water and Sewer Authority
Applicant/Permittee Address*
400 Jones Ferry Road; Carrboro, N.C. 27510-2001
Facility Name*
OWASA Class A Residuals Program
Please provide comments/notes on your current submittal below.
Renewal Package for Distribution of Class A Residuals Permit No. WQ0021828
High -Rate Infiltration
Reclaimed Water
Residuals
Other
At this time, paper copies are no longer required. If you have any questions about what is required, please contact Nathaniel Thornburg
at [e-mail].
Please attach all information required or requested for this submittal to be reviewed here.
(Application Form, Engineering Plans, Specifications, Calculations, Etc.)
Permit No. WQ0021828-OWASA Renewal of Distribution of
33.9MB
Class A Residuals Application (Oct. 7, 2022).pdf
Upload only 1 PDF document (less than 250 MB). Multiple documents must be combined into one PDF file unless file is larger
than upload limit.
* By checking this box, I acknowledge that I understand the application will not be
accepted for pre -review until the fee (if required) has been received by the Non -
Discharge Branch. Application fees must be submitted by check or money order and
made payable to the North Carolina Department of Environmental Quality (NCDEQ).
I also confirm that the uploaded document is a single PDF with all parts of the
application in correct order (as specified by the application).
Mail payment to:
NCDEQ — Division of Water Resources
Attn: Non -Discharge Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Signature
w��w

Submission Date 10/7/2022

APPLICATION FOR PERMIT RENEWAL
DISTRIBUTION OF CLASS A RESIDUALS
ORANGE WATER & SEWER AUTHORITY
NON -DISCHARGE PERMIT NO. WQ0021828
WMS S Project No. 15 -13, Phase: 01
Prepared for:
Orange Water & Sewer Authority
400 Jones Ferry Road
Carrboro, North Carolina 27510-2001
Prepared by:
Willcox & Mabe Soil Solutions, PLLC
7231 B Surnmerfield Road
Surnmerfield, North Carolina 27358
willcox&mabe
SO 1 L S O L U T I ON S
October, 2022

OWA ORANGE WATER AND SE
A aal her non laa~crfat ca ency pa ovi(fin water, scpaver and reclaimed water sca vices
0 to the Caarrbor a-C kia e l Hill coraa7nunft3f.
October 7, 2022
NCDENR
Division of Water Resources
Water Quality Permitting Section - Non Discharge Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
RE: OWASA Class -A Biosolids Permit # WQ0021828
Pursuant to administrative code, the Orange Water & Sewer Authority with the assistance of Willcox & Mabe
Soil Solutions, PLLC submits the subject permit renewal application and supportive documentation.
OWASA has always maintained a successful biosolids recycling program and the land application of biosolids has
been an integral part of our overall program. The biosolids produced at the Mason Farm WWTP are treated
though a Class -A temperature phased (thermophilic) anaerobic digestion process. In addition, the 100%
domestic nature of the wastewater treated at the facility lends to the resulting biosolids to exceptionally low
levels of the regulated metals parameter (meeting EQ standards). Land application goals are for approximately
75% of OWASA's Class -A liquid biosolids recycling, with approximately 25% being dewatered and transported to
McGill Environmental for composting.
OWASA's land application program incorporates the use of mainly privately owned local farmland in Orange,
Chatham and Alamance Counties; in addition to some acreage owned by OWASA. The program crops grown
annually are predominantly hay/pasture land, with some occasional row crop. OWASA's land application
program is classified as a non -dedicated program. While OWASA does not currently market/distribute its Class -
A biosolids, we want preserve that recycling management option in the re -issued permit.
If there are any questions regarding this permit renewal application please contact me directly.
Sincerely,
Wilmer Lawson
Wastewater Treatment and Biosolids Recycling Manager
Orange Water & Sewer Authority
[e-mail]
Office# 919-537-4351
)O Jones Ferry Road Equal Opportanftd Eraapkver Voice (9; 9) 968-"2 tl
Caaa-t-boro, NIC 275➢0-200 PHnted on Recycled Paper imu.esraaw.org

TABLE OF CONTENTS
APPENDIX TITLE
SIGNATURE AUTHORITY DESIGNATION
DISTRIBUTION OF CLASS A RESIDUALS
APPLICATION FORM
(FORM: DCAR 06-16)
OPERATION AND MAINTENANCE PLAN (RENEWAL)
II FORM DCAR 06-16 (ITEM D. - PROGRAM INFORMATION)
• MASON FARM WWTP
III RESIDUALS SOURCE CERTIFICATION
APPLICATION FORM
• MASON FARM WWTP
(FORM: RSC 06-16)

APPENDIX 1
SIGNATURE AUTHORITY DESIGNATION
DISTRIBUTION OF CLASS A RESIDUALS
APPLICATION FORM
(FORM: DCAR 06-16)
OPERATION AND MAINTENANCE PLAN (RENEWAL)

SIGNATURE AUTHORITY DESIGNATION

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S. I)AN =N. SM11-1
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Division of Water Resources
Non -Discharge Branch
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
To Whom It May Concern:
Environmental Quality
October 5, 2022
Subject: Permit No. WQ0021828 AND
WQ0001169
Signature Authority Designation
OWASA DCAR & RLAP
Class A and Class B Residuals
Orange County
As an appropriate signing official for Orange Water and Sewer Authority (city/town or business name)
as designated by 15A NCAC 2T .0106,1 hereby delegate authority to sign and certify all permit
applications, reports or other permit related documents to the following staff for the following permit
types (sewer, spray, land application) and/or permit numbers:
Position
Person
Currently in
Position
Permit Type
or Permit
Number
Wastewater Treatment and
Biosolids Recycling Manager
Wil Lawson
DCAR - WQ0021828 and
RLAP — WQ0001169
If you have any questions, please contact me at the following:
Permittee/Applicant name (please print): Orange Water and Sewer Authority / Todd Taylor
Title: Executive Director
Complete mailing address: 400 Jones Fegy Road
City: Carrboro State: N.C. Zip: 27510
Telephone number: ( 919) 537-4216 Facsimile number: ( )
Sincerely,
Todd Taylor, P.E.
Executive Director
f1t>rth �Sr:li,. i� s�tt�Y r � i6Ii Mad r,p71 ti �}i tr,It Auv�r

DISTRIBUTION OF CLASS A RESIDUALS
APPLICATION FORM
(FORM: DCAR 06-16)

State of North Carolina
Department of Environmental Quality
Division of Water Resources
Division of Water Resources 15A NCAC 02T .1100 — DISTRIBUTION OF CLASS A RESIDUALS
INSTRUCTIONS FOR FORM: DCAR 06-1.6 & SUPPORTING DOCUMENTATION
Please use the following instructions as a checklist in order to ensure all required items are submitted. Adherence to these
instructions and checking the provided boxes will help produce a quicker review time and reduce the amount of additional
information requested. Failure to submit all of the required items will lead to additional processing and review time for the
permit application. Unless otherwise noted, the Applicant shall submit one original and two copies of the application and
supporting documentation
For more information, visit the Water Quality Permitting Section's lgn- ichcari$e P'er~nritt°in Untt ivebsite
General — This application is for treatment, storage, transport, distribution, land application, and/or marketing of Class A (or Equivalent)
residuals under 15A NCAC 02TA 100.
Unless otherwise noted, the Applicant shall submit one original and two copies of the application and supporting documentation listed
below.
A. Distribution of Class A Residuals (FORM: DCAR 06-16):
® Submit the completed and appropriately executed Distribution of Class A Residuals (FORM: DCAR 06-16) form. Please do
not make any unauthorized content changes to this form. If necessary for clarity or due to space restrictions, attachments to
the application may be made, as long as the attachments are numbered to correspond to the section and item to which they
refer.
® The project name should be consistent on the plans, specifications, etc.
® The Applicant's Certification on Page 3 of this form shall be signed in accordance with 15A NCAC CYIT D0 06lhal. An alternate
person may be designated as the signing official if a delegation letter is provided from a person who meets the criteria in 15A.
NCAC 02T .0106Cb .
❑ If this project is for a modification of an existing permit, submit one copy of the existing permit.
® Please submit this application form at least 180 days prior to the expiration date on the existing permit, or 90 days prior to
operation of proposed faeility(ies) for application packages involving new or changes to treatment and storage units.
B. Application Fee (New and Major Modification Application Packages) RENEWAL — N/A
❑ Submit a check, money order or electronic funds transfer made payable to: North Carolina Department of Environmental
Quality (NCDEQ).
Facility Classification New Permit Major Modification r
Major (residuals permitted for distribution > 3,000 dry tons/year) $1,31.0 $395
Minor (residuals permitted for distribution < 3,000 dry tons/year) $810 $245
- A major modification shall be defined as any permit modification that: increases the generating facility's residuals dry tonnage;
adds additional residuals sources; or includes the addition of new treatment or storage units/processes not previously permitted.
There is no fee for minor permit modifications.
C. Cover Letter (All Application Packages)
® List all items included in the application package, as well as a brief description of the requested permitting action.
INSTRUCTIONS FOR FORM: DCAR 06-16 Pagel of 3

D. Program Information (All Application Packages) (APPENDIX II)
® Provide a narrative explaining the following:
® How the materials will be handled and transported from where the residuals were produced to where it will be treated.
® How the residuals will be processed/treated (attach process flow diagram).
® How leachate collection will be handled.
® Where the residuals will be stored until processed.
® How the final product will be distributed (packaging, bulk, etc.)
® What nutrients or other constituents (i.e. nitrogen, phosphorous, aluminum, calcium, etc.) are used or recommended as the
limiting parameter for determination of residuals loading rate to ensure that it does not overload the soil and cause
contravention of surface water or groundwater standards, limit crop growth, or adversely impact soil quality.
® Attach a marketability statement detailing destinations and approximate amounts of the final product to be distributed.
® Provide either a label that shall be affixed to the bagged processed residual or an information sheet that shall be provided to the
person who receives the processed residual. The label or information sheet shall contain, at a minimum, the following
information:
® Name and address of the person who prepared the residual that is sold or given away.
® A statement that application of the residuals to the land shall be in accordance with the instructions on the label or
information sheet.
® A statement that the residuals shall not be applied to any site that is flooded, frozen or snow-covered.
® A statement that adequate procedures shall be provided to prevent surface runoff from carrying any disposed or stored
residuals into any surface waters.
® Information on all applicable setbacks in accordance with 1.5A NCAC 02T .I 108(b).
® A statement that the residuals shall be applied at agronomic or recommended rates for intended uses.
E. Detailed Plans and Specifications (Application Involving New or Changes to Treatment or Storage Units) (N/A)
❑ Submit detailed plans and specifications that have been signed, sealed, and dated by a NC Professional Engineer per 15A
NCAC 02'T .1101(al. Specifications for standard equipment may only be omitted for municipalities with approved standard
specifications, but use of the standard specifications must be noted on each sheet of the plans.
❑ Plans must include the following minimum items: a general location map, a topographic map, plan and profile view of the
residuals treatment and storage units as well as the proximity of the residuals treatment and storage units to other utilities and
natural features within 500 feet of all treatment and storage facilities, and detail drawings of all items pertinent to the residuals
treatment and storage units. Depict minimum separations required in 15A NCAC 021' .1.108 Lal on the plans.
❑ Specifications must include, at a minimum, the following for all items pertinent to residuals treatment and storage units:
description of materials to be used, methods of construction, quality of construction testing procedures to ensure the integrity
of the final product in accordance with 15A NCAC 02T .1104(a)(2)�(I3), including leakage and pressure testing as appropriate.
❑ Plans and specifications must not be labeled with preliminary phrases (e.g., FOR REVIEW ONLY, NOT FOR
CONSTRUCTION, etc.) that indicate that they are anything other than final plans and specifications. However, the plans and
specifications may be labeled with the phrase: FINAL DESIGN — NOT RELEASED FOR CONSTRUCTION.
F. Engineering Calculations (Application Involving New or Changes to Treatment or Storage Units) (N/A)
❑ Submit all design calculations that have been signed, sealed, and dated by a NC Professional Engineer per 15A NCAC 02T
1104La
G. Environmental Assessments (May be Required — See 15A NCAC 1 C .0300) (N/A)
❑ Submit a copy of the Findings of No Significant Impact (FONSI) or Environmental Impact Statement (EIS). Also, include
information on any mitigating factor(s) from the Environmental Assessment (EA) that impact the construction of the residuals
treatment and storage facilities. An EA may also be required for private systems if any public funds and/or lands are used for
the construction of the subject facilities.
INSTRUCTIONS FOR FORM: DCAR 06-16 Page 2 of 3

H. Operation and Maintenance Plan (New and Renewal Application Packages) (APPENDIX I)
❑ For Modification Application, if there are any changes to the existing plan, submit an updated O&M plan.
® Submit the O&M Plan in accordance with 15A NCAC 02T .1110 and include at a minimum:
® Operational functions; describe the operation of the program to show what operations are necessary for the program to function
and by whom the functions are to be conducted.
® Maintenance schedules; may include equipments calibration, maintenance of signs, etc.
® Safety measures; may include safety training program, manuals, signs, etc.
® Spill response plan; including control, containment, remediation, emergency contact information, etc.
® Inspection plan including the following information;
® Names and titles of personnel responsible for conducting the inspections.
® Frequency and location of inspections, including those to be conducted by the ORC, and procedures to assure that the selected
location(s) and inspection frequency are representative of the residuals management program.
® Detailed description of inspection procedures including record keeping and actions to be taken by the inspector in the event
that noncompliance is observed.
® Sampling and monitoring plan including the following information;
® Names and titles of personnel responsible for conducting the sampling and monitoring.
® Detailed description of monitoring procedures including parameters to be monitored.
® Sampling frequency and procedures to assure that representative samples are being collected. Fluctuation in temperature, flow,
and other operating conditions can affect the quality of the residuals gathered during a particular sampling event. The sampling
plan shall account for any foreseen fluctuations in residuals quality and indicate the most limiting times for residuals to meet
pathogen and vector attraction reduction requirements (e.g. facilities that land apply multiple times per year but have an annual
sampling frequency, may need to sample during winter months when pathogen reduction is most likely to be negatively affected
by cold temperatures.
ONE ORIGINAL AND TWO COPIES OF THE COMPLETED APPLICATION PACKAGE, INCLUDING ALL
SUPPORTING INFORMATION AND MATERIALS, SHALL BE SENT TO THE FOLLOWING ADDRESS:
NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
WATER QUALITY PERMITTING SECTION
NON -DISCHARGE PERMITTING UNIT
By U.S. Postal Service:
1617 MAIL SERVICE CENTER
RALEIGH, NORTH CAROLINA 27699-1617
TELEPHONE NUMBER: [phone]
By Courier/Special Delivery:
512 N. SALISBURY STREET
RALEIGH, NORTH CAROLINA 27604
FAX NUMBER: [phone]
INSTRUCTIONS FOR FORM: DCAR 06-16 Page 3 of 3

State of North Carolina
DWR
Department of Environmental Quality
Division of Water Resources
Division of Water Resources 15A NCAC 02T .1100 — DISTRIBUTION OF CLASS A RESIDUALS
FORM: DCAR 06-16
I. APPLICANT INFORMATION:
1. Applicant's name: Orange Water and Sewer Authority
Applicant type: ❑ Individual ❑ Corporation ❑ General Partnership ❑ Privately -Owned Public Utility
❑ Federal ❑ State ® Municipal ❑ County
Signature authority's name per 15A NC'AC 02T .0106: Wil Lawson Title: Wastewater Treatment and Biosolids Recycling Manager
Applicant's mailing address: 400 Jones Ferry Road
City: Carrboro State: N.C. Zip: 27510
Telephone number: [phone] Email Address: [e-mail]
2. Consultant's name: Rob Willcox, LSS License Number (for P.E.):
Affiliation: ❑ On Staff ® Retained (Firm: Willcox & Mahe Soil Solutions PLLC)
Consultant's mailing address: 723113 Summerfield Road
City: Summerfield State: N.C.. Zip: 27358
Telephone number: [phone] Email Address: [e-mail]
3. Fee submitted: $0.00 — Renewal Only (See Instruction B)
II. PERMIT INFORMATION:
1. Application is for (check all that apply): ❑ new, ❑ modified, ® renewed permit
2. If this application is being submitted to renew or modify an existing permit, provide the following:
Permit number: W00021828
Date of most -recently issued permit: August 11, 2017
Date of most -recently certified Attachment A (if different than the permit):
III. FACILITY INFORMATION:
1. Name of residuals processing facility: Mason Farm WWTP
City: Chapel Hill State: N.C. Zip: 27517
Coordinates: Latitude: 35° 56' 00" Longitude: 79' 12' 30"
Datum: NAD 83 Level of accuracy: nearest second
Method of measurement: MAP
County where facility is located: Orange
2. Facility contact (person familiar with residuals preparation):
Name: Wil Lawson Title: Wastewater Treatment and Biosolids Recycling Manager
Mailing address: 400 Jones Ferry Road
City: Carrboro State: N.C. Zip: 27510
Telephone number: [phone] E-mail address: [e-mail]
FORM: DCAR 06-16 Page 1 of 3

3. Is the residual process facility also the generator? ® Yes; ❑ No
If No, please specify delivery frequency and quantity of residual to be processed:
4. Length of residuals storage at facility: >30 days (Note: the Division requires minimum 30 days storage in units that are separate
from treatment system, i.e. not in clarifiers, aeration basins, etc.)
IV. RESIDUALS QUALITY INFORMATION:
1. Specify how these residuals will be distributed:
❑ sold or given away in bags or other containers; ❑ lawn (bulk); ❑ home garden (bulk);
® other (explain); Land applied as a liquid or cake residual
Note: Bulk residuals shall mean residuals that are transported and not sold or giving away in a bag or other receptacles with a
load capacity of one metric ton or less.
2. Complete the following if residuals are to be mixed with other materials:
Type of Materials Amounts to be added
per 1.0 dry ton of residuals (dry ton)
N/A
3. Approximate amounts of the residuals received and processed at the facility: 2,100 dry tons per year.
4. Approximate amounts of the final product (processed residuals) to be distributed: 2,100 dry tons per year.
5. Provide a description of the onsite storage management plan for the treated residuals (including estimated average and
maximum storage times prior to distribution): 1,880,000 gallon Thermophilic Anaerobic Digestion System and 3,000,000 gals
(on & off -site storage tanks)
6. Does the facility have a stormwater management plan? ❑ Yes; ® No
Explain whether the treatment and storage areas are under roof or how stormwater runoff will be handled: N/A
V. RESIDUALS SOURCE INFORMATION: (Required for all new, renewed, or modified residuals source)
Complete and submit the attached Residuals Source Certification and all associated documentation.
Residuals Source
Certification (APPENDIX III)
FORM: DCAR 06-16 Page 2 of 3

Professional Engineer's Certification: (Application Involving New or Changes to Treatment or Storage Units)
11 . . ...... ... (NIA) attest that this application for
has been reviewed by me and is accurate and complete to the best of my knowledge. I further attest that to the best of my knowledge
the proposed design has been prepared in accordance with the applicable regulations. Although certain portions of this submittal package
may have been developed by other professionals, inclusion of these materials under my signature and sea] signifies that I have reviewed
this material and have judged it to be consistent with the proposed design.
North Carolina Professional Engineer's Seal, Signature, and Date:
Applicant's Certification:
The applicant or any affiliate has not been convicted of an environmental crime, has not abandoned a wastewater facility without proper
closure, does not have an outstanding civil penalty where all appeals have been exhausted or abandoned, are compliant with any active
compliance schedule, and do not have any overdue annual fees under Rule 15A NCAC 02T.0105.
E Yes D No, Explain; —
I, Wil Lawson Wastewater Manager
(Signature Authority's Name — PLEASE PRINT) (Title)
attest that this application for Renewal of Permit No. WQ0021828 — OWASA DCAR
(Facility Name)
has been reviewed by me and is accurate and complete to the best of my knowledge. I understand that the Division of Water Resources
may not conduct a technical review of this program and approval does not constitute a variance to any rules or statutes unless specifically
granted in the permit. Further, any discharge of residuals to surface waters or the land will result in an immediate enforcement action,
which may include civil penalties, injunctive relief, and/or criminal prosecution. I will make no claim against the Division of Water
Resources should a condition of this permit be violated. I also understand that if all required parts of this application are not completed
and that if all required supporting information and attachments are not included, this application package will be returned to me as
incomplete.
Note: In accordance with North Carolina General Statutes § 143-215.6A and § 143-215.613, any person who knowingly makes any false
statement, representation, or certification in any application shall be guilty of a Class 2 misdemeanor, which may include a fine not to
exceed $ 10,000 as well as civil penalties up to $2 5,000 per violation.
Signature: _U�4� Date: 09/27/2022
FORM: DCAR 06-16 Page 3 of 3

OPERATION AND MAINTENANCE PLAN (RENEWAL)

Orange Water and Sewer Authority
Mason Farm Wastewater Treatment Plant
Class A Permit — Permit No. WQ0021828
OPERATION AND MAINTENANCE PLAN
Mailing Address
400 Jones Ferry Road
Carrboro, NC 27510
Plant Address
170 Old Mason Farm Road
Chapel Hill, NC 27517
Contact Information
Wilmer Lawson
Wastewater Treatment and Biosolids Recycling
Manager Contact Number: (919) 53 7-43 51
[e-mail]
Dylan Bowers
Biosolids Recycling Supervisor
Contact number: [phone]
[e-mail]

Orange Water and Sewer Authority
Mason Farm Wastewater Treatment Plant
Class A Permit — Permit No. WQ0021828
MANAGEMENT PLAN
The biosolids management program proposes that biosolids from the OWASA Mason Farm Wastewater
Treatment Plant (WWTP) be applied to permitted fields as an agricultural resource at agronomic rates.
The biosolids will be applied to crop, hay and or pasture land at agronomic rates for total or partial
replacement of conventional N and P fertilizers. The actual amount of biosolids applied will be dependent
upon the nutrient requirement of the specific crop and the nutrient content of the biosolids.
Biosolids application scheduling will be dependent upon the biosolids production and storage at the
WWTP and the crop management program. On farms utilized for hay and pasture production, biosolids
will be applied in split applications as is normally done when conventional fertilizers are applied to hay
fields. These applications will correspond prior to grass growth in the spring, after each cutting in the
growing season, or whenever it is most appropriate.
Sites will receive biosolids in an agronomic manner based on requirements listed in Permit WQ0021828.
Biosolids will be applied at agronomic rates which are limited by Plant Available Nitrogen (PAN).
Prior to an application event, an application rate will be determined based on current nutrient
analysis. Current nutrient data will consist of the following information: ammonia nitrogen, nitrate/nitrite
nitrogen, phosphorus, % total solids, total Kjeldahl nitrogen, aluminum, antimony, arsenic,
cadmium, calcium, chromium, copper, iron, lead, manganese, mercury, molybdenum, nickel, selenium,
silver, and zinc. Plant available nitrogen (PAN) will then be calculated from this biosolids analysis. This
information will then be used to calculate the loading rate for the field and crop.
Once the appropriate application rate has been calculated, the biosolids will be removed from
the wastewater treatment plant storage and transported to the land application sites in trucks or
tankers designed to transport liquid biosolids.
The tankers will then travel major traffic routes to the fields whenever possible. Once at the field,
the tankers will proceed to a designated staging area. The biosolids will then be transferred to a
liquid biosolids applicator designed and operated to obtain an even application consistent with
agricultural requirements. Equipment used for liquid biosolids applications is an Ag Chem 2505
Terra-gator, and/or a Nuhn 4,000 gallon liquid spreader pulled behind a tractor, and/or a 6,000 gallon
GEA Houle liquid spreader.
All biosolids will be removed from the staging area by the end of the working day, unless equipment
breakdown or weather prohibits biosolids application. At the start of each day, all fields will be
inspected by the biosolids recycling supervisor. Equipment will only enter a field when conditions are
appropriate

MANAGEMENT PLAN
(continued)
for the application of biosolids. Biosolids will only be applied when the field is capable of supporting
equipment without extensive rutting. When field conditions are not appropriate for biosolids application,
such as during wet periods and during the winter, the biosolids will remain at the WWTP storage tanks,
off -site storage tanks (2,500,000 gallons) or dewatered "cake" will be delivered to McGill Environmental
for composting via our MACK roll -off truck.
During the field inspection, the biosolids recycling manager will note the standard buffer zones listed in
Permit No. WQ0021828, including: water supply sources, surface waters, surface water diversions,
groundwater lowering ditches, wells, and bedrock outcrops. On the basis of these standard NCDEQ
buffers for land application programs, buffers will be established in the field. These buffers will be
identified in the field by the placement of pin flags. Once, buffer areas have been properly identified, the
field inspection form listed herein will be completed.
BEST MANAGEMENT PRACTICES
1. Both surface and subsurface incorporation methods of application will be utilized depending on
anticipated crop and site conditions.
2. For surface application the maximum slope of the application site shall not exceed 10 percent and
for subsurface application the maximum slope of the application site shall not exceed 18 percent.
3. No application will be made during inclement weather, immediately following a rainfall event, or
to any application site with saturated soil condition.
4. During inclement weather, high winds and heavy rains, steps will be taken to prevent the surface
runoff from carrying any applied or stored biosolids into surface waters.
5. No biosolids will be applied to any site that is flooded, frozen or snow-covered.
6. Lime loading rates will be based on agronomic rate determined by the soil fertility analysis.
7. Any spill of biosolids will be managed in accordance with our spill procedure.

OWASA MASON FARM WWTP
170 OLD MASON FARM ROAD
CHAPEL HILL, NC 27517
919-537-4282
FIELD INSPECTION OF RESIDUALS APPLICATION
DATE: START TIME:
FARMER/LANDOWNER:
LOCATION OF FARM: COUNTY•
SITE 4
FIELD #
# OF TRUCKS OPERATING: SPREADER:
EQUIPMENT NOTES:
ARE BUFFER ZONES FLAGGED: SIGNS POSTED: TRUCK SIGNS:
ONSITE TANK LEVEL:
TYPE OF FIELD APPLYING TO: PASTURE HAY CROP:
METHOD OF APPLICATION: SURFACE LIQUID OTHER:
WEATHER CONDITIONS: CLEAR FAIR PARTLY CLOUDY CLOUDY
SOIL CONDITIONS: DRY
MOIST WET
TEMPERATURE: >90 70-90 32-70 <32
INSPECTED BY:
POST APPLICATION INSPECTION DATE•

In accordance with the setbacks in 15A NCAC 02T .1108(b), when distributing or land applying
biosolids buffer zone will be maintained at all times.
INSPECTION PLAN
Prior to land application of biosolids, designated OWASA staff and/or 3ra party contract applier
personnel inspect the land application site and document findings on the inspection log. All required land
application buffers as defined by 15A NCAC 02T .1108 are established in the field prior to land
application; these buffer boundaries are identified in the field by the placements of pin flags and are
maintained at all times during application. The field inspection log is attached.
Class -A Setbacks
Residuals
Any private or public water supply source
Surface waters
Surface water diversions
Groundwater lowering ditches
Wells w/exception of monitoring wells
Bedrock outcrops
Liquid Residuals Cake
100 feet
100 feet
100 feet
25 feet
25 feet
0 feet
25 feet
0 feet
100 feet
100 feet
25 feet
0 feet

SPILL CONTROL PLAN
In the case of a spill, the following action shall be taken immediately:
Halt the source of the spill: Ruptured line or valve, or damaged tank unit.
Contain spill: Use straw bales to form a barrier. Straw hay bales can be obtained from several
sources for this purpose. Soil near the site can also be used to form a barrier for containment.
Clean up: Use biosolids application equipment to recover as much of the material as possible.
After the application equipment has recovered as much material as possible, it will be land
applied as per operation plan. A temporary sump pit may be dug in the containment area and
spilled material washed into it to enhance recovery.
4. Final Clean up: Any unrecoverable material will be washed from the road surface and
incorporated into an adjacent tillable area.
Notification: As soon as possible after a spill occurs notify:
A. Orange Water and Sewer Authority (91.9) 968-4421
B. OWASA Mason Farm Wastewater Treatment Plant [phone]
C. Department of Environmental Quality Raleigh Regional Office at [phone]
D. Orange County Sheriff's Department [phone]
Chatham County Sheriff's Department [phone]
Alamance County Sheriff's Department [phone]
E. Fire Department if assistance is required for wash down.
Management of cleanup efforts: The Biosolids Recycling Supervisor shall take immediate
charge of the cleanup activities. Additional labor will be requested from the treatment plant and
other departments as needed. The OWASA owns a spill containment trailer which is available for
use in the containment and clean up of any biosolids spills.
Reporting: Within 24 hours of a spill the Biosolids Recycling Supervisor shall present a
written report detailing the cause of the spill and all action taken in response to the spill

APPLICATION RATES
The biosolids application rate will be based on the plant available nitrogen (PAN) requirement for the crop
and the PAN content in the biosolids. Agronomic rates will be calculated using nitrogen requirements
based upon the determined Realistic Expected Yield (RYE) using North Carolina historic data for specific
crop and soil types as provided by North Carolina State University Department of Soil Science
(http://nutrients.soil.nesu.edu/vields/index�hp). Crops typically grown in the Orange, Alamance and
Chatham County area are fescue, small grains, corn, Bermuda grass, and soybeans.
The PAN content of the biosolids will be based on, total Kjeldahl nitrogen (TKN), ammonium -nitrogen
(NH4-N), nitrate -nitrogen (NO3-N), nitrite -nitrogen (NO2-N) content, and the mineralization of organic N
into inorganic N. Most of the nitrogen in the biosolids is in an organic form. As the biosolids is
incorporated into the soil, the soil microorganisms utilize the biosolids as an energy and nutrient source.
In the process, a portion of the organic N is mineralized, or biologically converted, into inorganic N.
Various environmental factors such as temperature, moisture, and carbon to nitrogen ration will affect the
mineralization rate. Typical mineralization factors range from 0.2 to 0.4. A mineralization rate of 0.20 has
been selected for this land treatment program due to the anaerobic digestion process.
The PAN application rate will be calculated based on the mineralization rate, TKN, NH4-N, NO3-N, NO2-
N content, and method of application. Biosolids which are injected into the soil typically retain a large
portion of the NH3 gas which is found in the biosolids or is converted from the NH4-N form.
However, when the biosolids is surface applied to hay or fallow row crops fields, a large portion of the
NH3-N is volatilized and lost as a nutrient for crop uptake. The actual PAN content for equal biosolids is
less when the biosolids is surface applied compared to when the biosolids is injected into the soil and the
NH3-N gas is trapped by the soil. To reflect the lower PAN content for surface applied biosolids due to
the volatilization of NH3-N gas, the portion of NI14-N in the biosolids contributing to the PAN is reduced
by 50%.
The PAN content of the biosolids is then calculated for injected and surface application as follows:
A. PAN injected = 0.20 (TKN — NH4-N) + NH4-N + NO3-N + NO2-N
B. PAN surface applied = 0.20 (TKN — NH4-N) + 0.5 (NH4-N) + NO3-N + NO2-N where:
0.20 = mineralization factor (anaerobically digested biosolids)
TKN = Total Kjeldahl Nitrogen
NH4-N =Ammonia nitrogen
NO3-N =Nitrate nitrogen
NO2-N =Nitrite nitrogen
0.5 = Volatilization factor
PAN Applied = (gal/ac) (8.34 lb/gal) (% Solids) (% PAN)

BIOSOLIDS CHARACTERISTICS
The OWASA Mason Farm Wastewater Treatment Facility currently generates about 13,000,000 gallons
per year of anaerobically digested biosolids and has approximately 3,000,000 gallons of biosolids storage
capacity on site and off site. Characteristics of the biosolids are shown on the attached application form
(Section 2) and results of the TCLP's and Biosolids analysis are given in Appendix 1. The biosolids
characteristics are typical of other biosolids generated by WWTP's in North Carolina. Likewise, the
TCLP results are well below the maximum limits for a waste to be characterized as non -hazardous.

MONITORING
The biosolids and soil will be sampled at specific intervals to insure the beneficial utilization for
agricultural production. Biosolids samples will be obtained routinely for purposes of calculating field
application summaries. The biosolids samples will be collected and delivered to a laboratory qualified to
analyze biosolids and is familiar with routine environmental sample preparation and standards.
A biosolids analysis will be conducted for, but not limited to, the following parameters, ammonia
nitrogen, nitrate/nitrite nitrogen, phosphorus, % total solids, total Kjeldahl nitrogen, aluminum, antimony,
arsenic, cadmium, calcium, chromium, copper, iron, lead, manganese, mercury, molybdenum, nickel,
selenium, silver and zinc.
Once each year, the fields will be sampled for routine soil fertility and lime requirement. Although the
soil samples will likely be collected in the fall or winter seasons, the soil samples may also be collected
between cropping's. Once the soil samples are collected, the soil samples will be delivered to either the
North Carolina Department of Agriculture - Agronomic Division or a qualified laboratory for routine soil
analysis.

Records pertinent to the successful management of the land applications program will be maintained for
the benefit of the landowner, the NCDEQ, and the Orange Water and Sewer Authority. Each year an
annual summary of the activities of the program will be prepared and delivered to the appropriate
agencies and participants. The annual summary will include:
A) Source of biosolids
B) Date of biosolids application
C) Location of biosolids application (field number)
D) Method of application
E) Weather conditions
F) Type of crop or crop to be grown on field
G) Volume of biosolids applied in gallons/acre and dry tons/acre
H) Annual and cumulative total of dry tons/acre of biosolids, annual and cumulative
pounds/acre of each heavy metal (which shall include, but not be limited to lead, nickel,
cadmium, copper, zinc, arsenic, chromium mercury, molybdenum, and selenium), annual
pounds/acre of plant available nitrogen (PAN), and annual pounds/acre of phosphorus
and potassium applied to each field.
2. A biosolids analysis which will include the following parameters: ammonia nitrogen,
nitrate/nitrite nitrogen, phosphorus, % total solids, total Kjeldahl nitrogen, aluminum,
antimony, arsenic, cadmium, calcium, chromium, copper, iron, lead, manganese,
mercury, molybdenum, nickel, selenium, silver, and zinc.

APPENDIX II
FORM DCAR 06-16 (ITEM D. - PROGRAM INFORMATION)
• MASON FARM WWTP

D. Program Information (MASON FARM WWTP)
« How the materials will be handled and transported from where the residuals
were produced to where it will be treated.
All residuals will remain at the WWTP or Off -Site Storage Facility until ready for
land application
• How the residuals will be processed/treated (attach process flow diagram).
(Attached at the end of this Section)
« How leachate collection will be handled.
Leachate will not be generated
• Where the residuals will be stored until processed.
(Same as Above) - All residuals will remain at the WWTP or Off -Site Storage
Facility until ready for land application
• How the final product will be distributed (packaging, bulk, etc.)
The final product will be land applied to private farm land
• What nutrients or other constituents (i.e. nitrogen, phosphorous, aluminum,
calcium, etc.) are used or recommended as the limiting parameter for
determination of residuals loading rate to ensure that it does not overload the
soil and cause contravention of surface water or groundwater standards, limit
crop growth, or adversely impact soil quality.
One of the primary benefits of the WWTP residuals will be its ability to be utilized as
a nitrogen source to replace the need for commercial nitrogen. Plant Available
Nitrogen (PAN) will be applied at agronomic rates in accordance with existing permit
conditions that regulate application rates.
• Attach a marketability statement detailing destinations and approximate
amounts of the final product to be distributed.
Product Information Sheet and Application Information Sheet attached at the end of
this Section
• Provide either a label that shall be affixed to the bagged processed residual or an
information sheet that shall be provided to the person who receives the
processed residual. The label or information sheet shall contain, at a minimum,
the following information:

D. Program Information (MASON FARM WWTP) Page 2
• Name and address of the person who prepared the residual that is sold or given
away.
• A statement that application of the residuals to the land shall be in accordance
with the instructions on the label or information sheet.
• A statement that the residuals shall not be applied to any site that is flooded,
frozen or snow-covered.
• A statement that adequate procedures shall be provided to prevent surface runoff
from carrying any disposed or stored residuals into any surface waters.
• Information on all applicable setbacks in accordance with 15A NCAC 02T
.1108(b).
• A statement that the residuals shall be applied at agronomic or recommended rates
for intended uses.
Product Information Sheet and Application Information Sheet attached at the end of this
Section

ORANGE WATER AND SEWER AUTHORITY (OWASA)
MASON FARM WASTEWATER TREATMENT PLANT
SIMPLIFIED ANAEROBIC DIGESTION PROCESS FLOW SCHEMATIC
Primary Sludge & Waste Activated Sludge
RDT = ROTARY DRUM THICKENER
RDT RDT
#1 #2
(COLD, THICKENED SLUDGE TO DIGESTION) —►
1 ST STAGE TEMPERATURE RANGE
(THERMOPHILIC TEMPERATURE) ANAEROBIC 135 F -140 F
DIGESTER #4 CONTINUOUS OR BATCH FEED,
HEAT EXCHANGER & BATCH DISCHARGE
RECIRCULATION PUMP ,
2nd STAGE TEMPERATURE RANGE
(THERMOPHILIC TEMPERATURE) ANAEROBIC 135 F -140 F
DIGESTER #3 BATCH FEED & DISCHARGE,
HEAT EXCHANGER & HOLD BATCH - REQ'D. HOURS
RECIRCULATION PUMP �
R EPA 503 TIME & TEMPERATURE
REQUIREMENTS MET IN THIS TANK
40 CFR Part 503.32-3ii.D.
3rd STAGE TEMPERATURE RANGE
(THERMOPHILIC TEMPERATURE) ANAEROBIC 115 F -125 F
DIGESTER #2 BATCH FEED, NEAR
HEAT EXCHANGER & TINUOUS DISCHARGE
RECIRCULATION PUMP CON
4th STAGE
(MESOPHILIC TEMPERATURE) TEMPERATURE RANGE
ANAEROBIC TEMPERATURE
115 F
HEAT EXCHANGER & DIGESTER#1 CONTINUOUS FEED,
RECIRCULATION PUMP BATCH DISCHARGE STORAGE
TA#N K
STORAGE
BIOSOLIDS TO IN -PLANT TANK
STORAGE TANKS #2
LIQUID BIOSOLIDS TO:
LAND APPLICATION or
OFFSITE STORAGE
DEWATERED BIOSOLIDS TO:
COMMERCIAL COMPOST FACILITY

ORANGE WATER AND SEWER AUTHORITY
CLASS A EXCEPTIONAL QUALITY BIOSOLIDS
INFORMATION SHEET
CONTACT INFORMATION:
Contact Person: Wilmer Lawson
Contact Title: Wastewater Treatment and Biosolids Recycling Manager
Contact Number: [phone]
Mailing Address Plant Address
400 Jones Ferry Road Mason Farm Wastewater Treatment Plant
Carrboro, NC 27510 170 Old Mason Farm Road
Chapel Hill, NC 27517
Application of OWASA Class -A Exceptional Quality (EQ) biosolids is prohibited except in
accordance with these instructions.
BEST MANAGEMENT PRACTICES:
• Both surface and subsurface incorporation methods of application will be utilized
depending on anticipated crop and site conditions.
• No biosolids will be applied to any site that is flooded, frozen or snow-covered.
• During inclement weather, high winds and heavy rains, steps will be taken to prevent the
surface runoff from carrying any applied or stored biosolids into surface waters.
• For surface application the maximum slope of the application site shall not exceed 10
percent and for subsurface application the maximum slope of the application site shall not
exceed 18 percent.
• No application will be made during inclement weather, immediately following a rainfall
event, or to any application site with saturated soil condition.
• Lime loading rates will be based on agronomic rates determined by the soil analysis.
• Any spill of biosolids will be managed in accordance with OWASA's spill procedure.

SETBACK REQUIREMENTS:
In accordance with the setbacks in 15A NCAC 02T .1108(b), when distributing or land applying
biosolids Table 1 buffer zone will be maintained at all times.
TABLE 1
Division of Water Quality Buffers for Permit No. WQ0021828
Application Method
Area Description Liquid Residuals Cake Residual
feet feet
Private or public water supply sources 100 100
Surface water 100 25
Surface water diversion 25 0
Groundwater lowering ditches 25 0
Wells with exception to monitoring well 100 100
Bedrock outcrops 25 0
APPLICATION RATE:
The OWASA Class -A EQ biosolids shall be applied at agronomic rates. The biosolids application
rate will be based on the plant available nitrogen (PAN) requirement for the crop and the PAN
content in the biosolids.
Agronomic rates will be calculated using expected nitrogen requirements based upon the
determined Realistic Expected Yield (RYE) using North Carolina historic data for specific crop
and soil types as provided by North Carolina State University Department of Soil Science
(http://nutrients.soil.ncsu.edu/yields/index.php).

Application Information Sheet
1. Mason Farm WWTP "Class A biosolids" is intended for use as a nitrogen fertilizer.
Applications of Mason Farm WWTP "Class A biosolids" should be made in accordance
with approved application standards and WQ0021828 permit conditions.
2. Mason Farm WWTP "Class A biosolids" shall not be applied to flooded, frozen, or snow
covered areas.
3. Application and storage of Mason Farm WWTP "Class A biosolids" must be conducted
in such a way as to prevent runoff from the application or storage site to any surface water.
4. Applications and loading rates of Mason Farm WWTP "Class A biosolids" shall be
applied at rates that comply with realistic yield expectations based on the soil series and
crops found at: http://nutrients.soil.ncsu.edu/yields/.
5. Mason Farm WWTP "Class A biosolids" shall not be applied if the land fails to
assimilate the material or the application causes the contravention of surface water or
groundwater standards.
6. Mason Farm WWTP "Class A biosolids" shall not be applied within the I 00-year flood
elevation, unless the residuals are injected or incorporated within a 24-hour period
following a residuals land application event.
7. Mason Farm M7NVTP "Class A biosolids" shall not be applied during a measurable
precipitation event (i.e., greater than 0.01 inch per hour), or within 24 hours following a
rainfall event of 0.5 inches or greater in a 24-hour period.
8. Mason Farm WWTP "Class A biosolids" shall not be applied if the slope is greater than
10% for surface applied material, or if the slope is greater than 18% for injected or
incorporated material.
9. Mason Farm WWTP "Class A biosolids" shall not be applied if the land does not have
an established vegetative cover unless the residuals are incorporated or injected within a
24-hour period following a residuals land application event. Any field that is in a USDA
no -till program shall be exempted from meeting this vegetative cover requirement.
10. Mason Farm WWTP "Class A biosolids" shall not be applied if the vertical separation
between the seasonal high water table and the depth of residuals application is less than
one foot.
11. Mason Farm WWTP "Class A biosolids" shall not be applied if the vertical separation of
bedrock and the depth of residuals application is less than one foot.
Contact OWASA for a copy of the most recent residuals analysis and loading rates.

APPENDIX 111
RESIDUALS SOURCE CERTIFICATION
APPLICATION FORM
• MASON FARM WWTP
(FORM: RSC 06-16)

State of North Carolina
DWR
Department of Environmental Quality
Division of Water Resources
Division of Water Resources RESIDUALS SOURCE CERTIFICATION
INSTRUCTIONS FOR FORM: RSC 06-16
Please use the following instructions as a checklist in order to ensure all required items are submitted. Adherence to these
instructions and checking the provided boxes will help produce a quicker review time and reduce the amount of additional
information requested. Failure to submit all of the required items will lead to additional processing and review time for the
permit application. Unless otherwise noted, the Applicant shall submit one original and two copies of the application and
supporting; documentation
For more information, visit the Water Quality Permitting Section's Non -Discharge Pernaitt�t
General — This certification provides detailed information of residuals source generating facility and its residuals quality for land
application, distribution, or disposal in accordance with 15A. NCAC 02T .I 100. Do not submit this certification for review without
a corresponding application form (FORM: RLAP 11-15, FORM: DCAR 11-15, or FORM: SDR 11-15).
Unless otherwise noted, the Applicant shall submit one original and two copies of the application and supporting documentation listed
below.
A. Residuals Source Certification (FORM: RSC 11-15):
® Submit the completed and appropriately executed Residuals Source Certification (FORM: RSC 11-16) form. Please do not
make any unauthorized content changes to this form. If necessary for clarity or due to space restrictions, attachments to the
application may be made, as long as the attachments are numbered to correspond to the section and item to which they refer.
® For new or renewed permits, submit a separate certification for each source facility.
❑ For modified permits, submit a separate certification for only those facilities that are affected by the proposed modification.
® Complete the residuals source facility summary page. List all new, renewed, or modified facilities.
B. Residuals Source -Generating Facility Information:
® For each source facility, attach the following:
® Vicinity map - A vicinity map that shows the location of the facility and meets all of the criteria in the " rj __�s<<o
® Process flow diagram and/or narrative - A detailed narrative and/or process flow diagram that describes how the residuals
are to be generated, treated, processed, and stored at the facility.
® Quantitative justification for residuals production rate - A quantitative justification for the value provided in Item I. 8.
Ensure that the amount of residuals listed is the maximum amount expected to be generated by the facility for the life of
the permit. In addition, ensure that this amount is equivalent to that which is actually to be land applied, distributed,
and/or disposed, including any chemicals, amendments, or other additives that are added to the residuals during
processing.
® Sampling plan - A detailed sampling plan for the residuals source -generating facility. Ensure that the plan identifies
sampling points, sampling frequency, sample type, as well as the Division -certified laboratory to be used. In addition,
ensure that the plan details how the facility and/or the residuals are monitored for any applicable pathogen reduction and
vector attraction reduction requirements. Note that all sampling and monitoring must be completed on the residuals as
they are to be land applied, distributed, and/or disposed.
C. Residuals Quality Information:
® For each source facility, attach the following:
® Laboratory analytical reports and operational data - reports for all laboratory analyses used to complete this certification.
® Documentation that the facility complies and/or the residuals comply with any applicable pathogen reduction and vector
attraction reduction requirements.
❑ For new facility that may have not yet been constructed and analytical results of residuals cannot be obtained, please
attach analytical results of residuals generated from a similar facility along with the description of similarities of the two
facilities.
INSTRUCTIONS FOR FORM: RSC 06-16 Page 1 of I

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L RESIDUALS SOURCE -GENERATING FACILITY INFORMATION (See Instruction B.):
1. Facility Name: Mason Farm WWTP
2. Facility permit holder is: ❑ Federal, ❑ State, ® Local Government, or ❑ Private.
Facility permit issued by: ® Div. of Water Resources, ❑ Div. of Environmental Health,
or ❑ Other (explain: ).
3. Facility contact person and title: Wil Lawson, Wastewater Treatment and Biosolids Recyclinp, Manager
Complete mailing address: 400 Jones Ferry Road
City: Carrboro State: N.C. Zip: 27510
Telephone number: [phone] E-mail address: [e-mail]
4. Facility physical address: 170 Old Mason Farm Road
City: Chapel Hill State: N.C.. Zip: 27517
Coordinates: Latitude: 35156' 00" Longitude: 79012' 30"
Datum: NAD 83 Level of accuracy: nearest second
Method of measurement: MAP
5. Purpose of the facility:
® treatment of municipal wastewater, ® treatment of 100% domestic wastewater,
treatment of potable water, ❑ treatment of 100% industrial wastewater,
treatment of industrial wastewater mixed with domestic wastewater,
(approximate percentages: % industrial and % domestic)
❑ other (explain: ).
6. Does the facility have an approved pretreatment program: ❑ Yes ® No
7. Facility permitted/design flow: 14.5 MGD and facility average daily flow: 8.204 MGD
8. Average amount of residuals being generated at this facility 2,100 dry tons per year. (Permitted amount — 2,100 dry tons)
9. Specify the following regarding treatment and storage volumes available at the facility:
Type and volume of residuals treatment: 1,880,000 gallon Thermophilic Anaerobic Digestion System
Type and volume of residuals storage (i.e., outside of residuals treatment units): 3,000,000 gals (on & off -site storage tanks)
II. RESIDUALS QUALITY INFORMATION (See Instruction C.):
1. Specify if residuals are regulated under:
® 40 CFR Part 503 or ❑ 40 CFR Part 257.
Note: Only residuals that are generated during domestic/municipal wastewater treatment processes are regulated under 40
CFR Part 503, otherwise, the residuals are regulated under 40 CFR Part 257.
2. Specify if residuals are defined under 1 5A NC AC 02T.1102(61 as:
® Biological ❑ Non -Biological
Note: Biological residuals are residuals that have been generated during the treatment of domestic wastewater, animal
processing wastewater, or the biological treatment of industrial wastewater (biological treatment is a system that utilizes
biological processes including lagoons, activated sludge systems, extended aeration systems, and fixed film systems).
FORM: RSC 06-16 Page 1 of 5

3. Hazardous Waste Determination: Complete the following to demonstrate that the residuals are non -hazardous under
RCRA: (Note - this item does not have to be completed for facilities that are less than 0.5 MGD in design flow that treat
100% non -municipal, domestic wastewater only)
a. Are the residuals listed in 40 CFR §261.31-§261.33: ❑ yes ® no.
If yes, list the number(s):
b. Specify whether or not the residuals exhibit any of the characteristics defined by 40 CFR §261.21-
261.24: ❑ yes ® no.
Fill in the following tables with the results of the latest toxicity characteristic leaching procedure (TCLP) analysis as
well as those for corrosivity, ignitability, and reactivity:
Laboratory: Pace Analytical and Date of analysis: September 14, 2020
Passed corrosivity test: ® yes ❑ no. pH: s.u. (2 < pH < 12.5)
Passed ignitability test: ® yes ❑ no. Flashpoint: > 141 °F (> 140°F)
Passed reactivity test: Eyes ❑no. HCN: <1.0 mg/kg (<250) & H2S: <5.0 mg/kg (<500)
TCLP Parameter
Limit
(mg/l)
Result
(mg/1)
TCLP Parameter
Limit
(mg/1)
Result
(mg/l)
Arsenic
5.0
< 0.01
Hexachlorobenzene
0.13
<0.050
Barium
100.0
0.1
Hexachloro-1,3-Butadiene
0.5
<0.050
Benzene
0.5
<0.050
Hexachloroethane
3.0
<0.300
Cadmium
1.0
<0.005
Lead
5.0
<0.005
Carbon Tetrachloride
0.5
<0.050
Lindane
0.4
<0.040
Chlordane
0.03
<0.003
Mercury
0.2
<0.002
Chlorobenzene
1.00.0
<0.050
Methoxychlor
10.0
<1.000
Chloroform
6.0
<0.100
Methyl Ethyl Ketone
200.0
<0.500
Chromium
5.0
<0.01
Nitrobenzene
2.0
<0.200
m-Cresol
200.0
<20.0
Pentachlorophenol
100.0
<10.0
o-Cresol
200.0
<20.0
Pyridine
5.0
<0.500
p-Cresol
200.0
<20.0
Selenium
1.0
<0.1
Cresol
200.0
<20.0
Silver
5.0
<0.01
2,4-D
10.0
<1.000
Tetrachloroethylene
0.7
<0.050
1,4-Dichlorobenzene
7.5
<0.750
Toxaphene
0.5
<0.050
1,2-Dichloroethane
0.5
<0.050
Trichloroethylene
0.5
<0.050
1, 1 -Dichloroethylene
0.7
<0.050
2,4,5-Trichlorophenol
400.0
<40.0
2,4-Dinitrotoluene
0.13
<0.050
2,4,6-Trichlorophenol
2.0
<0.200
Endrin
0.02
<0.002
2,4,5-TP (Silvex)
1.0
<0.500
Heptachlor and its Hydroxide
0.008
<0.0008
Vinyl Chloride
0.2
<0.050
FORM: RSC 06-16 Page 2 of 5

4. Metals Determination: Complete one of the following tables (i.e., as applicable) to demonstrate that the residuals do not
violate the ceiling concentrations for metals regulated under 15A NQAQ 02T. 1105.
a. For Distribution/Land Application: Fill in the following table with the results of the latest analyses (i.e., on a dry weight
basis) for the following metal parameters:
Laboratory: Pace Analytical and Date of analysis: August 8, 2022
Parameter
Ceiling
Concentration Limits
(ClassA & ClassB)
(mg/kg)
Monthly Average
Concentration Limits
(Class A Only)
(mg/kg)
Result
(mg/kg)
Arsenic
75
41
<4.5 5
Cadmium
85
39
1.09
Copper
4,300
1,500
163
Lead
840
300
12
Mercury
57
17
<0.0182
Molybdenum
75
n/a
<2.27
Nickel
420
420
10
Selenium
100
100
<4.5 5
Zinc
7,500
2,800
750
b. For Surface Disposal Unit (landfill)
: Fill in the following table with the results of the latest analyses (i.e., on a dry weight
basis) for the following metal parameters:
Laboratory: - and Date of analysis: .
Distance from Disposal
Unit to Boundary to
Closest Property Line
(meters, check one)
Arsenic
(mg/kg)
Chromium
(mg/kg)
Nickel
(nag/kg)
❑ > 0 but < 25
30
200
210
❑ > 25 but < 50
34
220
240
❑ > 50 but < 75
39
260
270
❑ > 75 but < 100
46
300
320
❑ > 100 but< 125
53
360
390
❑ > 125
62
450
420
Result (mg/kg)
FORM: RSC 06-16 Page 3 of 5

5. Nutrient/Micronutrient Determination: Complete the following:
a. Total solids: 2.2 %.
b. Fill in the following table with the results of the latest analyses (i.e., on a dry weight basis) for the following nutrient and
micronutrient parameters:
Laboratory: Pace Analytical and Date of analysis: August 8, 2022
Parameter
Result
(mglkg)
Aluminum
44,000
Ammonia -Nitrogen
51,400
Calcium
17,500
Magnesium
4,860
Nitrate -Nitrite Nitrogen
78.15
pH (Standard Unit)
8.16 (9/14/20 — TCLP)
Phosphorus
44,500
Potassium
7,180
Sodium
5,680
Total Kjeldahl Nitrogen
81,400
c. Using the results listed in Item II. 5b. above, calculate the sodium adsorption ration (SAR): 1.45
[Note: If residuals contain SAR of 10 or higher, the applicant shall obtain recommendations from the local Cooperative
Extension Office, the Department of Agriculture and Consumer Services, the Natural Resource Conservation Service, a
North Carolina Licensed Soil Scientist, or an agronomist, prior to land application of residuals. The recommendations shall
address the sodium application rate, soil amendments (e.g., gypsum, etc.), or a mechanism for maintaining site integrity
and conditions conducive to crop growth].
d. Specify the mineralization rate to be used in calculating the plant available nitrogen (PAN) of the residuals: 20 %. This
rate is a (check one): ® default value, or ❑ actually established.
If the residuals are not generated from the treatment of municipal or domestic wastewater, explain or provide technical
justification as to why the selected default value is appropriate to be applied to these residuals:
e. Calculate the PAN for the residuals (i.e., on a dry weight basis) and fill the results in the following table:
Application Method
First (111) Year PAN
Five -Year
Maximum Adjusted PAN
(mg/kg)
(mg/kg)
Surface
31,778
36,395
Injection/Incorporation
57,478
62,095
6. Other Pollutants Determination: Specify whether or not there are any other pollutants of concern in the residuals and provide
the results of the latest analyses:
FORM: RSC 06-16 Page 4 of 5

7. Pathogen Reduction: Per I5A NCAC 02T,1 106, specify how residuals will meet the pathogen reduction requirements:
a. For Distribution/Land Application of Class A or Equivalent:
A fecal coliform density that is demonstrated to be less than 1,000 MPN per gram of total dry solids,
or
A salmonella sp. density that is demonstration to be less than 3 MPN per 4 grams of total dry solids.
AND one of the followings (except for non -biological residuals):
Alternative I r I 5A NCAC 02T. I 106(b)(3)(A)] - Time/Temperature Compliance.
❑ Alternative 2 [15A NCAC 02T. I 106(b)(3)(B)] - Alkaline Treatment.
❑ Alternative 3 [15A NCAC 02T.1 106(b)(3)(C)] - Prior Testing for Enteric Virus/Viable Helminth Ova.
❑ Alternative 4 [15A NCAC 02T.1 106(b)(3)(D)] - No Prior Testing for Enteric Virus/Viable Helminth Ova.
❑ Alternative 5 [15A NCAC 02T. I 106(b)(3)(E)-(K)] - Process to Further Reduce Pathogens (PFRP).
Specify one: ❑ composting, ❑ heat drying, ❑ heat treatment,
❑ thermophilic aerobic digestion, ❑ beta ray irradiation,
❑ gamma ray irradiation, or ❑ pasteurization.
b. For Land Application of Class B:
El Alternative I [ I 5A NCAC 02T. I 106(c)(1)] - Fecal Coliforin Density Demonstration.
❑ Alternative 2 [15A NCAC 02T.1106(c)(2)] - Process to Significantly Reduce Pathogens (PSRP).
Specify one: ❑ aerobic digestion, ❑ air drying, ❑ anaerobic digestion,
❑ composting, or ❑ lime stabilization.
c. For Surface Disposal:
n Select One of the Class A or Equivalent Pathogen Reduction Alternatives in Item 11. 7a. above.
❑ Select One of the Class B or Equivalent Pathogen Reduction Alternatives in Item 11. 7b. above.
❑ Exempt -If Daily Cover Alternative is chosen in Item 11.8. below [15A NCAC 02T.1106(a)(2)].
❑ Not Applicable - Non -Biological Residuals with NO Domestic Wastewater Contribution.
8. Vector Attraction Reduction (VAR): Per 15A NCAC 02T.1 107, specify how residuals will meet the VAR requirements:
Alternative I [15A NCAC 02T. I 107(a)(1)] - 3 8% Volatile Solids Reduction (Aerobic/Anaerobic Digestion).
❑ Alternative 2 [15A NCAC 02T. I 107(a)(2)] - 40-Day Bench Scale Test (Anaerobic Digestion).
❑ Alternative 3 [15A NCAC 02T. I 107(a)(3)] - 30-Day Bench Scale Test (Aerobic Digestion).
❑ Alternative 4 [15A NCAC 02T. I 107(a)(4)] - Specific Oxygen Uptake Rate Test (Aerobic Digestion).
❑ Alternative 5 [15A NCAC 02T. I 107(a)(5)] - 14-Day Aerobic Processes.
❑ Alternative 6 [15A NCAC 02T.1 107(a)(6)] - Alkaline Stabilization.
❑ Alternative 7 [15A NCAC 02T. I 107(a)(7)] - Drying of Stabilized Residuals.
❑ Alternative 8 [15A NCAC 02T. I 107(a)(8)] - Drying of Unstabilized Residuals.
❑ Alternative 9 [15A NCAC 02T. I 107(a)(9)] - Injection.
El Alternative 10 [ I 5A NCAC 02T. I 107(a)(I 0)] - Incorporation.
❑ Alternative for Surface Disposal Units Only - Soil/Other Material Cover [15A NCAC 02T. I 107(b)(2)],
❑ Not Applicable - Non -Biological Residuals with NO Domestic Wastewater Contribution.
Note: For animal processing residuals, only alternatives 9 or 10 may be chosen due to the nuisance conditions that typically
occur when these residuals are applied and left on the land surface.
FORM: RSC 06-16 Page 5 of 5

• MASON FARM WWTP
(FORM: RSC 06-16) (ATTACHMENTS)
o VICINITY MAP
o PROCESS FLOW DIAGRAM AND/OR NARRATIVE
o QUANTITATIVE JUSTIFICATION
o SAMPLING PLAN
o ANALYTICAL

ORANGE WATER AND SEWER AUTHORITY (OWASA)
MASON FARM WASTEWATER TREATMENT PLANT
SIMPLIFIED ANAEROBIC DIGESTION PROCESS FLOW SCHEMATIC
Primary Sludge & Waste Activated Sludge
RDT = ROTARY DRUM THICKENER
RDT RDT
#1 #2
(COLD, THICKENED SLUDGE TO DIGESTION) —►
n
1 ST STAGE TEMPERATURE RANGE
(THERMOPHILIC TEMPERATURE) ANAEROBIC 135 F -140 F
DIGESTER #4 CONTINUOUS OR BATCH FEED,
HEAT EXCHANGER & BATCH DISCHARGE
RECIRCULATION PUMP
4
2nd STAGE TEMPERATURE RANGE
(THERMOPHILIC TEMPERATURE) ANAEROB135 F -140 F
IC
DIGESTER#3 BATCH FEED & DISCHARGE,
HEAT EXCHANGER & HOLD BATCH - REQ'D. HOURS
RECIRCULATION PUMP
EPA 503 TIME & TEMPERATURE
REQUIREMENTS MET IN THIS TANK
40 CFR Part 503.32-3ii.D.
3rd STAGE TEMPERATURE RANGE
(THERMOPHILIC TEMPERATURE) ANAEROBIC 115 F -125 F
DIGESTER #2 BATCH FEED, NEAR
HEAT EXCHANGER & CONTINUOUS DISCHARGE
RECIRCULATION PUMP
4th STAGE
(MESOPHILIC TEMPERATURE)
TEMPERATURE RANGE
ANAEROBIC
HEAT EXCHANGER & DIGESTER #1
(��
< 115 F
CONTINUOUS FEED,
RECIRCULATION PUMP �./
BATCH DISCHARGE STORAGE
TANK
STORAGE
BIOSOLIDS TO IN -PLANT
TANK
STORAGE TANKS
#2
LIQUID BIOSOLIDS TO:
LAND APPLICATION or
OFFSITE STORAGE
DEWATERED BIOSOLIDS TO:
COMMERCIAL COMPOST FACILITY

QUANTITATIVE JUSTIFICATION
Orange Water and Sewer Authority (OWASA)
Mason Farm Wastewater Treatment Plant (WWTP)
Non -Discharge Permit No. WQ0021828
Requested Dry Tons for Renewal — 2,100
DISTRIBUTION OF CLASS A RESIDUALS
• Previously Permitted Dry Tons — 2,100
• Requested Dry Tons for Renewal — 2,100

MONITORING
The biosolids and soil will be sampled at specific intervals to insure the beneficial utilization for agricultural
production. Biosolids samples will be obtained routinely for purposes of calculating field application
summaries. The biosolids samples will be collected and delivered to a laboratory qualified to analyze
biosolids and is familiar with routine environmental sample preparation and standards.
A biosolids analysis will be conducted for, but not limited to, the following parameters, ammonia nitrogen,
nitrate/nitrite nitrogen, phosphorus, % total solids, total Kjeldahl nitrogen, aluminum, antimony, arsenic,
cadmium, calcium, chromium, copper, iron, lead, manganese, mercury, molybdenum, nickel, selenium,
silver and zinc.
Once each year, the fields will be sampled for routine soil fertility and lime requirement. Although the soil
samples will likely be collected in the fall or winter seasons, the soil samples may also be collected between
cropping's. Once the soil samples are collected, the soil samples will be delivered to either the North
Carolina Department of Agriculture - Agronomic Division or a qualified laboratory for routine soil analysis

OWASA
LAND APPLICATION PROGRAM
BIOSOLIDS ANALYSIS
Residual Type: Wastewater Treatment Plant Biosolids
Date Sampled: July 18, 2022
Date Reported: August 8, 2022
Mason Farm WWTP Permit No. WQ0001169
Mineralization Rate 0.2 2.20 % Solids
8.16 pH (from 9/14/20 TCLP)
Parameter
%
Mg/Kg Dry Weight
(% x 10,000)
Pounds/Dry Ton
(Mg/Kg x 0.002)
Nitrogen (TKN)
8.140
81,400.000
162.800
Phosphorus
4.450
44,500.000
89.000
Potassium
0.718
7,180,000
14.360
PAN (injected)*
5.748
57,478.150
114,956
PAN (surface)*
3.178
31,778.150
63.556
Ammonia Nitrogen
5.140
51,400.000
102.800
Calcium
1.750
17,500.000
35.000
Calcium Carbonate Eq.
---
---
---
Magnesium
---
4,860.000
9.720
Sodium
---
5,680.000
11.360
Sulfur
---
--_
Nitrate N / Nitrite N
---
78.150
0.156
Barium
Chloride
---
---
---
---
---
SAR
1.45
Iron
---
---
---
Ceiling Concen,
(Mg/Kg)
Aluminum
---
44,000.00
88.000
Arsenic
---
4.550
---
75
Cadmium
---
1.090
0.002
85
Chromium
-__
--_
Copper
---
163.00
0.326
4,300
Lead
---
12.000
0.024
840
Mercury
---
0.018
---
57
Molybdenum
---
2.270
-__
75
Nickel
---
10.00
0.020
420
Selenium
---
4.550
---
100
Zinc
---
750.00
1.500
7,500
Pace Analytical 92615356001
*Determination of Plant Available Nitrogen (PAN):
Injected Application:
(Mineralization Rate)(TKN-Ammonia N) + Ammonia N + Nitrate N + Nitrite N = % PAN
Surface Application:
(Mineralization Rate)(TKN-Ammonia N) + (0.5)(Ammonia N) + Nitrate N + Nitrite N = % PAN
Note: Constituents N.D. (Not Detected) or < detection limits are listed as detection limits
for calculation purposes.

Willcox & Mahe Soil Solutions, PLLC
RESIDUAL PAN CALCULATION
OWASA - MASON FARM WWTP
TKN= 81,400 mg/kg
NH3= 51,400 mg/kg
NO3-NO2-N= 78.2 mg/kg
Min Rate= 0.20
PAN= [min.rate (TKN - NH3) + 0.5 (NH3) + NO3-NO21
0.20 30,000 25,700 78.15
PAN= 31778.15 mg/kg
Calculate residual nitrogen for years 2,3,4 and 5 following the initial application to determine
the amount of PAN/DT remaining.
2ND YEAR RESIDUAL PAN
PAN= [min.rate (1st year org. - N 2nd year min. - N1
0.10 30,000 6,000
PAN= 2400.00 mg/kg remaining from 1st year application
3RD YEAR RESIDUAL PAN
PAN= [min.rate (2nd year org. - N 3rd year min. - N1
0.05 24,000 2,400
PAN= 11.52.00 mg/kg remaining from 1st year application
4TH YEAR RESIDUAL PAN
PAN= [min.rate (3rd year org. - N 4th year min. - N1
0.03 21,600 1,152
PAN= 681.60 mg/kg remaining from 1 st year application
5TH YEAR RESIDUAL PAN
PAN= [min.rate (4th year org. - N 5th year min. - N1
0.02 20,448 682
PAN= 383.07 mg/kg remaining from 1 st year application
Residual PAN from years 2 thru 5 after the initial application = 4616.67 mg/kg
Application
Five Year Maximum
Method
First Year PAN
Adjusted PAN
(mg/kg)
(mg/kg)
Surface
31,778
36,395
Incorporation
57,478
62,095
Application
Five Year Maximum
Method
First Year PAN
Adjusted PAN
(lbs/DT)
(lbs/DT)
Surface
63.56
72.79
Incorporation
114.96
124.19

OWASA SAR
Page 1

Pinfki ni2fm
Date
Metals
Aluminum
Arsenic
Calcium
I
Chromium
Copper
e
fl
Iron
Lead
magnesium
Manganes
Mercury
Molybdenud
Nickel
/kg
mg/kg
mg/kg ..
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
7/18/2022
44
4.55
1.09
17500
163
12
4860
<0.018-2]
—<2,27
10
_I
Potassium
"
S2� �iumsiiver
Sodium
Sulfur
Zn
I Chloride
NH3-N
I NO2-N
NO3-N
p
TKN-N
TS
f�mg/Zg
—
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
ry
mg/kg
11 7180
<4.55
5680
750
—1
51400
5.45 T-72.7
77.3
44500
81400
22
-a F, va U6- tu c LH:HH)"Al FIIIJST V)( ,',OPIveNterl MW I 't(-Ss tharl" for repm-LVng, as they are, bp�ow detecUon leve[.

aceAnalytical
www.pacelabs.com
Wilmer Lawson
OWASA
400Jones Ferry Road
Carrboro, NC 27510
Project: OWASA Digested Sludge
Pace Project No.: 92615356
RECEIVED
183y LJennifer Hunter at 10:04 am, Aug 27,2022
Laboratory Report
Pace Analytical Services, LLC
1377 South Park Drive
Kernersville, NC 27284
[phone]
Page 1 of 1
Report Date: 08/08/2022
Date Received: 07/18/2022
Sample: Digested Sludge
Method Parameters
Lab ID: 92615356001 Collected: 07/18/22 09:50 Matrix:
Results Units Report Limit
Water
Analyzed Qualifiers
EPA 200.7 Rev 4.4 1994
Aluminum
967000
ug/L
1000
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Arsenic
ND
ug/L
100
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Cadmium
23.9
ug/L
10.0
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Calcium
386000
ug/L
1000
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Copper
3580
ug/L
50.0
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Lead
264
ug/L
50.0
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Magnesium
107000
ug/L
1000
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Molybdenum
ND
ug/L
50.0
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Nickel
220
ug/L
50.0
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Potassium
158000
ug/L
50000
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Selenium
ND
ug/L
100
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Sodium
125000
ug/L
50000
07/29/22 15:03
EPA 200.7 Rev 4.4 1994
Zinc
16500
ug/L
100
07/29/22 15:03
EPA 245.1 Rev 3.0 1994
Mercury
ND
ug/L
0.40
08/05/22 09:25 D3
SM 2540B-2015
Total Solids
22000
mg/L
2500
07/23/22 10:11
EPA 350.1 Rev 2.0 1993
Nitrogen, Ammonia
1130
mg/L
25.0
07/26/22 13:14
EPA 351.2 Rev 2.0 1993
Nitrogen, Kjeldahl, Total
1790
mg/L
100
07/26/22 04:49
EPA 353.2 Rev 2.0 1993
Nitrogen, NO2 plus NO3
1.7
mg/L
0.040
07/20/22 01:19
EPA 353.2 Rev 2.0 1993
Nitrogen, Nitrate
1.6
mg/L
0.040
07/20/22 01:19
EPA 353.2 Rev 2.0 1993
Nitrogen, Nitrite
0.12
mg/L
0.040
07/20/22 01:19 M1
EPA 365.1 Rev 2.0 1993
Phosphorus
978
mg/L
12.5
07/21/22 18:18
ANALYTE QUALIFIERS
D3 Sample was diluted due to the presence of high levels of non -target analytes or other matrix interference.
M1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery.
Reviewed by:
Stephanie Knott
704-977-0981
[e-mail]
Pace Analytical Services Asheville
2225 Riverside Drive, Asheville, NC 28804
Florida/NELAP Certification #: E87648
North Carolina Drinking Water Certification #: 37712
North Carolina Wastewater Certification #: 40
South Carolina Laboratory ID: 99030
South Carolina Certification #: 99030001
Virginia/VELAP Certification #: 460222
Page 1 of 4

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RESEARCii & ANAtyTICAL
LAbORATORIES, INC.
Analytical/Process Consultations
''�•;r�D A41P�'►r�'�
�*Nnn►w►
Toxicity Characteristic Leachate Procedure (TCLP) Analysis of Sample Identified as Digested Sludge + TCLP
An Orange Water & Sewer Authority Project, collected 14 September 20201
Digested Sludge
EPA HW Quantitation Results Characteristic
umber Contaminant Limit(mg/L) (me/L) 1,evel(me/L) EPA Method
L TCLP METALS
D-004 Arsenic
0.01
BQL
5.00
6010
D-005 Barium
0.1
BQL
100
6010
D-006 Cadmium
0.005
BQL
1.00
6010
D-007 Chromium
0.01
BQL
5.00
6010
D-008 Lead
0.005
BQL
5.00
6010
D-009 Mercury
0,002
BQL
0.200
7470
D-010 Selenium
0.1
BQL
1.00
6010
D-0I1 Silver
0.01
BQL
5.00
6010
H. TCLP VOLATILES
D-018 Benzene
0.050
BQL
0.500
8260
D-019 Carbon Tetrachloride
0.050
BQL
0.500
8260
D-021 Chlorobenzene
0.050
BQL
100
8260
D-022 Chloroform
0.100
BQL
6.00
8260
D-028 1,2-Dichloroethane
0.050
BQL
0.500
8260
D-029 1,1-Dichlorocthylene
0.050
BQL
0.700
8260
D-035 Methyl Ethyl Ketone
0.500
BQL
200
8260
D-039 Tctrachloreethylene
0.050
BQL
0.700
8260
D-040 Trichloroethylene
0.050
BQL
0.500
8260
D-043 Vinyl Chloride
0.050
BQL
0.200
9260
III. TCLP SEMI-VOLATILES
D-023 0-Creosol
20.0
BQL
200
$270
D-024 M-Creosol
20.0
BQL
200
8270
D-025 p-Creosol
20.0
BQL
200
8270
D-026 Creosol
20.0
BQL
200
8270
D-027 1,4-Dichlorobenzene
0.750
BQL
7.50
8270
D-030 2,4-Dinitrotoluene
0.050
BQL
0.130
8270
D-032 Hexachlorobenzeoe
0.050
BQL
0.130
8270
D-033 Hexachlorobutadiene
0.050
BQL
0.500
8270
D-034 Hexachloroethane
0.300
BQL
3.00
8270
D-036 Nitrobenzene
0.200
BQL
2.00
8270
D-037 Pentachlorophenol
10.0
BQL
100
8270
D-039 Pyridinc
0.500
BQL
5.00
8240
D-041 2,4,5-Trichlorophenol
40.0
BQL
400
8270
D-042 2,4,6-Trichlorephenal
0.200
BQL
2.00
8270
IV. TCLP PESTICIDES/HERBICIDES
D-020 Chlordane
0.003
BQL
0.030
8081
D-016 2,4-D
1.000
BQL
10.0
8151
D-012 Endrin
0.002
BQL
0.020
8081
D-031 Heptachlor
0.0008
BQL
0.008
8081
D-013 Lindanc
0.040
BQL
0.400
8081
D-014 Methoxychlor
1000
BQL
10.0
8081
D-015 Toxaphene
0.050
BQL
0.500
9081
D-017 2,4,5-TP(Silvcx)
0.500
BQL
1.00
8151
V. REACTIVITY
D-003 Cyanide
1.0
BQL
9010
D-003 Sulfide
5.0
BQL
9030
VI. CORROSIVITY
D-002 PH
Std. Units
8.16
9045
VII. IGNITABILITY
D-001 Ignitability
>141
1010
VIII. TCLP MISCELLANEOUS
Paint Filter Test
FLP
Sample Number
97405-01
Sample Date
09/14/20
Sample Time (brs)
1020
Sample Matrix
Sludge
mg/kg - milligrams per Idlognnm = pauper million (ppm)
NFL = No Free Liquids
WNI = Will Not ignite
man- = milligrams per Liter - Parts per million (ppm)
BQL = Below Quantitation Limits
FLP = Free Liquids Present

OWASA
Digested Sludge Analysis for Fecal Coliform
Reported MPN fecal coliform/g = 21 (geometric mean for Class B)
MAX 107 (single value, Class A)
MIN <g
Average MPN fecal coliform/g= 36
Date
MPN Index /
100mis
TS
%
Largest Volume
Used mL
MPN FC/g
03/07/22
<2
1.68
1
<12
03/08/22
23
2.8
1
82
03/09/22
2
2.15
1
9
03/10/22
23
2.15
1
107
03/14/22
<2
2.38
1
<8
03/16/22
<2
1.78
1
<11
03/17/22
4
1.94
1
21
Using EPA 503 rules for Class Sludge, Appendix F:
-follow SM 9221 E (Al Media)-2006, SM 9221 C Table 9221:IV-2006
-Report as MPN Fecal Coliform/gram
-Calculation(EPA) _ (10 * (MPN Index/100 mis))/(largest volume*% dry solids)
where: MPN Index/100mis is read from MPN table,
-Each reported value must be <1000 MPN per gram total solids (dry wt basis)
Using EPA 503 rules for Class B Sludge, Appendix F:
-follow SM 9221 E (Al Media)-2006, SM 9221 C Table 9221:IV-2006
-Report as MPN Fecal Coliform/gram
-Calculation(EPA) _ (10 * (MPN Index/100 mis))/(largest volume*% dry solids)
where: MPN Index/100mis is read from MPN table,
-Reported value is geometric mean of all samples
-Reported value must be <2 million MPN per gram total solids (dry wt basis)

2021
Jan-21
Feb-21
Mar-21
Apr-21
May-21
Jun-21
Jul-21
Aug-21
Sep-21
Oct-21
Nov-21
Dec-21
OWASA MASON FARM WWTP - DIGESTION PROCESS OPERATING SUMMARY
AVERAGE MONTHLY OPERATING TEMPERATURES & RETENTION TIMES
CALENDAR YEAR 2021
DIGESTER 4
AVG TEMP
HRT
F
DAYS
137.9
14.0
138.7
10.9
138.7
11.2
139.6
8.0
139.6
7.3
139.8
8.6
139.8
11.0
140.1
11.4
139.8
11.4
139.7
13.3
139.6
8.8
139.9
8.3
DIGESTER 3
AVG TEMP
HRT
F-
DAYS
138.2
6.9
139.9
5.8
139.2
5.4
139.2
5A
139.1
6.0
139.6
6.9
139.6
8.4
139.2
8.7
139.3
7.2
139.1
7.5
139.1
7.2
140.0
8.2
AVG 139.4 10.3 139.3 7.0
MAX 140.1 14.0 140.0 8.7
MIN 137.9 7.3 138.2 5.4
DIGESTER 2
AVG TEMP
HRT
F
DAYS
126.3
5.4
127.3
5.5
128.6
5.1
130.2
5.3
130.6
6.1
131.5
6.4
131.2
8.6
130.8
8.0
130.7
7.3
129.5
7.3
127.7
6.5
126.6
8.3
1293 7.5
131.5 8.6
126.3 6.4
DIGESTER 1
AVG TEMP
HRT
F
DAYS
108.6
11.4
108.7
10.5
113.3
10.7
116.7
11.2
119.4
12.9
121.0
13.4
121.6
18.8
121.3
17.1
121.3
16.2
119.1
15.5
115.3
13.8
112.9
17.4
116.6 14.1
121.6 18.8
108.6 10.5
COMBINED
AVG TEMP
HRT
F-
DAYS
127.8
37,7
128.7
32.6
130.0
32.4
131.4
29.9
132.2
32.2
133.0
35.3
133.1
46.8
132.9
45.2
136.6
42.1
132.6
416
131.3
36.3
130.9
42.2
131.7 38.0
136.6 46.8
127.8 29.9

Jan-21
Feb-21
Mar-21
Apr-21
May-21
Jun-21
Jul-21
Aug-21
Sep-21
Oct-21
Nov-21
Dec-21
F-11TLC
OWASA MASON FARM WWTP - DIGESTER RETENTION TIME
DIGESTER 4
Cap. = 570,000 GALS.
(Esti Use 85%Cap.)
IN \ OUT RETENTION
GALS. DAYS
34,728 14.0
44,619 10.9
43,452 11.2
60,224 8.0
66,661 7.3
56,161 8.6
44,187 11.0
42,332 11.4
42,550 11.4
36,400 13.3
55,256 8.8
58,107 8.3
48,723 10.3
66,661 14.0
34,728 7.3
DIGESTER 3
Cap, = 310,000 GALS.
(Esti Use 85%Cap.)
IN\OUT RETENTION
GALS. DAYS
38,120
6.9
45,044
5.8
48,506
5.4
48,351
5.4
44,127
6.0
38,147
6.9
31,309
8.4
30,434
8.7
36,578
7.2
35,108
7.5
36,812
7.2
32,312
8.2
38,737 7.0
48,506 8.7
30,434 5.4
DIGESTER 2
Cap. = 310,000 GALS.
(Esti Use 85%Cap.)
IN \ OUT RETENTION
GALS. DAYS
48,529
5.4
48,151
5.5
51,692
5.1
49,897
5.3
43,509
6.1
41,467
6.4
30,510
8.6
32,943
8.0
36,327
7.3
36,168
7.3
40,308
6.5
31,929
8.3
35,665 7.5
41,467 8.6
30,510 6.4
DIGESTER I
Cap. = 690,000 GALS.
(Esti Use 85%Cap.)
IN\OUT
RETENTION
GALS.
DAYS
51,224
11.4
56,064
10,5
54,785
10.7
52,560
11,2
45,595
12.9
43,792
13.4
31,262
18.8
34,388
17,1
36,142
16.2
37,723
15.5
42,463
13.8
33,658
17.4
43,305 14.1
56,064 18.8
31,262 10

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL SOLIDS AND pH WORKSHEET
JANUARY 2021
SAMPLE
DATE
PRIMARY
SLUDGE TO RDT
WASTE ACTIVATED
SLUDGE TO RDT
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
LAND APPLICATION
%TS
%TVT
%TS
PF
%TVs
%TS
%TVs
%TS
%TVs
PH
01/01/21
01/02/21
01/03/21
01/04/21
1.34
61.92
7.6
01/05/21
1.67
61.16
7.6
01/06/21
0.74
88.08
0.77
70.57
6.34
81.30
1.85
61.20
7.6
01/07/21
1.32
62.4-9
7.6
01/08/21
01/09/21
01/10/21
01/11/21
133
62.02
7.7
01/12/21
1.21
----90.54
0.84
70.16
1 5.72
83.33
1.31
61.58
7.7
01/13/21
1
1.40
61.35
7.6
01/14/21
2.48
60.94
7.7
01/15/21
01/16/21
01/17/21
01/18/21
01/19/21
1.54
90.53
0.79
70.11
1 5.86
82.29
1.34
61.11
7.8
01/20/21
01/21/21
01/22/21
01/23/21
01/24/21
01/25/21
01/26/21
01/27/21
1.03
90.34
0.76
71.51 1
7.23
81.42
1.67
62.03
7.7
01/28/21
01/29/21
-
01/36/2-1
-6*1 -/31/21
LF
1
AVERAGE
1.13
89.87 11
0.79
62-9
82.09
1.57
61.58 1
7.66

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL• r AND pH WORKSHEET
:2021
r•-
PRIMARY
SLUDGE TO Ku
r •l
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
r -- •

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL SOLIDS AND pH WORKSHEET
MARCH 2021
SAMPLE
DATE
PRIMARY
SLUDGE TO RDT
WASTE ACTIVATED
SLUDGE TO RDT
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
APPLICATION
%TS
%TVS
%TS-
%TVS
%TS
%TVS
biLAINID
%TS
%TVS
pH
03/01/21
03/02/21
03/03/21
NS
NS
0.50
72.33
6.54
84.74
10
1.10
61.81
7.6
03/04/21
03/05/21
03/06/21
03/07/21
03/08/21
1.59
61.94
7.5
03/09/21
1.59
62.15
7.5
03/10/21
0.78
85.61
0.91
74.86
1 4.67
83.05
1.58
62.19
7A
03/11/21
1,59
62.27
7.4
03/12/21
03/13/21
03/14/21
03/15/21
1.59
62.66
7.4
03/16/21
1.57
62.40
7.4
03/17/21
NS
NS
1.05
74.83
3.97
83.06
1-.54
62.18
7.4
03/18/21
1.55
62.22
7.4
03/19/21
03/20/21
03/21/21
03/22/21
03/23/21
03/24121
1.77
90.47
1.46
74.53
3.93
78.51
1.46
62.81
7.4
03/25/21
03126/21
03/27/21
03/28/21
03/29/21
03/30/21
0.33
81.67
1.47
74.82
6.84
77.71
0.75
63.84
78
AVERAGE
---0.96
85.92
1.08
74.27
5.19
81.41
1.45
62.41
. 5
71

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL SOLIDS AND pH WORKSHEET
APRIL 2021
SAMPLE
DATE
PRIMARY
SLUDGE TO RDT
WASTE ACTIVATED
SLUDGE TO RDT
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
APPLICATION
%TS
%TS
%TVS
%TS
%TVS
ELAIND
%TS
%TVS
pH
04/01/21
04/02/21
04/03/21
04/04/21
04/05/21
04/06/21
04/07/21
0.49
85.49
1.37
74.24
5.19
8129
1.45
63.69
7.4
04/08/21
04/09/21
04/10121
04/11/21
04/12/21
04/13/21
04/14/21
1 0.31
81.13
1.27
74.62
3.90
75.21
1.54
63.93
7.6
04/15/21
04/16/21
04/17121
04/18/21
04/19/21
04/20/21
04/21/21 1
0,39
84.62
1.03
74.18 1
4.40
84.04
1.60
63.72
7,5
04/22/21
04/23/21
04/24/21
04/25/21
04/26/21
04/27/21
0.96
8921
1.03
74.16
4.69
80.46
1.72
63.62
7.6
04/28/21
04/29/21
04/30/21
AVERAGE
0.54 1
85.24
1.18
74.30 11
4.55
80.75
1.58
r 63-74
7.52

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL SOLIDS AND pH WORKSHEET
MAY 2021
SAMPLE
DATE
PRIMARY
SLUDGE TO RDT
WASTE ACTIVATED
SLUDGE TO RDT
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
LAND APPLICATION
%TS
%TS
%TVS
%TS
%TVS
%TS
%TVS
pH
05/01/21
05/02/21
05/03/21
05/04/21
0.21
77.62
0.98
73.50
4.90
82.61
1.83
63.86
7.5
05/05/21
05/06/21
05/07121
05/08/21
05/09/21
05/10121
1.86
64.34-
7.5
05/11/21
1.91
64.33
7.5
05/12/21
0.48
86.83
0.94
74.35
4.31
83.88
1.9,1
64.42
7.6
05/13/21
1.89
6417
7.5
05/14121
05/15/21
05/16/21
05/17121
1.88
64.32
7.5
05/18/21
0.10
39.71
1.08
73.68
5.04
84A8
1.90
64.23-
7.5
05/19/21
1.90
64.62
7.5
05/20/21
1.91
64.56
7.6
05/21/21
05/22/21
05/23/21
05/24/21
05/25/21
0.26
69.49
0.95
74.05
6.30
80.16
1.98
64.23
7.7
05/26/21
05/27/21
05/28/21
05/21/21
05/30/21
05/31/21
AVERAGE
0.26
68.41
0.99
73.90
5.14
E2.78
1.90 1
64.3111

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL SOLIDS AND pH WORKSHEET
JUNE 2021
SAMPLE
DATE
PRIMARY
SLUDGE TO RDT
WASTE ACTIVATED
SLUDGE TO RDT
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
LAND APPLICATION
%TS
%TVS
%TS
%TVS
%TS
%TVS
%TS
%TVS
PH
06/01/21
06/02/21
06/03/21
0.10
56.74
1.10
73.30
6.84
79.27
1.92
64.69
NS
06/04/21
06/05/21
06/06/21
06/07/21
06/08/21
0.32
80.42
1.82
73.96
7.26
79.99
1.89
64.71
NS
06/09/21
06/10/21
06/11/21
06/12/21
06/13/21
06/14/21
06/15/21
0.08
51.89
1.30
72.90
5.38
75.17
1.92
64.20
7.6
06/16/21
1
06117/21
06/18/21
06/19/21
06/20/21
06/21/21
06/22/21
0.05
58.04
1.56
73.10
4.95
75.22
1.95
64.99
7.7
06/23/21
06/24/21
06/25/21
06/26/21
06/27/21
06/28/21
06/29/21
06/30/21
1.16
91-99 1
0.68
72.21
7.27 1
82.47
2.01
64.74 1
7.6
1AVERAGE 11
0.34
67.82 11
1.29
73.09
6.34 11
78.42
1.94 1
64.67 IT
�76 3

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL SOLIDS AND pH WORKSHEET
JULY 2021
SAMPLE
DATE
PRIMARY
SLUDGE TO RDT
WASTE ACTIVATED
SLUDGE
COMBINED PS +
I WAS
B
BIOSOLIDS TO
APPLICATION
%TS
.TS
%TVs
%TS
%TVS_
%TS
%TVS�-
k�ILAND
TSj
%TS
%TVS
pH
07/01/21
07/02/21
07/03/21
07/04/21
07/05/21
07/06/21
07/07/21
7.7
07/08/21
07/09/21
07/10/21
07/11/21
07/12/21
2.16
64.38
7.6
07/13/21
2.18
64.52-
7.4
07/14/21
2.20
64.54
7.5
07/15/21
0.07
48.42
0.75
70.19
6.93
75,62
2.20
62.31
7.5
07/16/21
07/17/21
07/18/21
07/19/21
2Al
63.86
7.6
07/20/21
0.06
60.96
0.68
71.18
7.60
77.37
2.13
63.86
7.7
07/21/21
2.13
63.90
7.6
07/22/21
2.21
65.00
7.9
07/23/21
07/24/21
07/25/21
07/26/21
0.29
86.27
0.69
70.88
7.77
83.44
2.13
63.97
07/27/21
07/28/21
07129/21
07/30/21
07/31/21
1
AVERAGE�
0.14
65.22
0.71
70.75
7.43 1
78.81
2.16 1
64.04
7.61

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL SOLIDS AND pH WORKSHEET
AUGUST 2021
PRIMARY
SLUDGETORDT
COMBINED �Ps+
WAS TO DIGESTION
BIOSOLIDS TO
LAND APPLICATION

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
• SOLIDS AND pH •-
SEPTEMBER 2021
PRIMARY
SLUDGE TO f:?,DT
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
LAND APPLICATION
Ell

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PANT
TOTAL SOLIDSAND pH WORKSHEET
• •2021
r'SLUDGE
PRIMARY
TO RDT
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
r APPLICATION

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL SOLIDS AND pH WORKSHEET
NOVEMBER 2021
SAMPLE
DATE
PRIMARY
SLUDGE TO RDT
WASTE ACTIVATED
SLUDGE TO GBT
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
LAND APPLICATION
%TS
%TVS
%TS
%TVS
%TS
%TVS
%TVS
pH
11/01/21
11/02/21
11/03/21
1.77
91.45
0.99
72.58
5.13
85.18
2.11
64.50
7.6
11/04/21
11/05/21
11/06/21
11/07/21
11/08121
2.07
65.62
7.4
11/09/21
2.11
65.28
7.7
11/10/21
10.43
90.98
1.38
73.70
3.43
86.21
2.06
65.09
7.5
11/11/21
2.05
65.05
7.6
11/12/21
11/13/21
11/14/21
11/15121
2.04
64.39
7.6
11/16/21
2.06
64.44
7.6
11/17/21
2.05
64.43
7.6
11/18/21
12.00
90.10
2.37
73.83
6.87
84.19
2.06
64.96
7.9
11/19/21
11/20/21
11/21121
11/22/21
11/23/21
11/24/21
2.27
78.16
0.78
72.71
5.68
77.23
1.99
64.46
7.5
11/25/21
11/26/21
11/27121
E11/28/21
111/29/21
1
l/ 9
/
11/30/21
11 0 1
AVERAGE
I 1-.6-2--F-87.67

ORANGE WATER AND SEWER AUTHORITY
MASON FARM WASTEWATER TREATMENT PLANT
TOTAL SOLIDS AND pH WORKSHEET
DECEMBER 2021
SAMPLE
DATE
PRIMARY
SLUDGE TO RDT
WASTE ACTIVATED
SLUDGE TO GBT
PR�j
COMBINED PS +
WAS TO DIGESTION
BIOSOLIDS TO
LAND APPLICATION
%TS
%TVS
%TS
%TVS
%TS
%TVS
%TS
%TVS
pH
12/01/21
2.78
89.54
0.93
1 75.18
3.06
84.73
2.09
65.26
7.5
12/02/21
12/03121
12/04/21
12/05/21
12/06/21
12/07/21
12/08121
1.78
92.69
0.84
73.73
4,61
86.37
2.07
65.23
7.7
12/09/21
12/10/21
12/11/21
12/12/21
12/13121
12/14/21
12/15/21 1
1.02
90.36
0.85
75.27
3.09
83.60
1.82
64.55
7.7
12/16/21
12/17121
12/18/21
12/19/21
12/20/21
179
91.76
0.99
74.56
5.17
85.46
2.08
64.40
7.5
12/21/21
12/22/21
12/23/21
12/24/21
12/25/21
12/26/21
12127/21
12/28121
12/29/21
1.79
91.66
1.01
74.93
5.03
85.75
2.14
65.46
7.7
12/30/21
12/31/21
JAVERAGE
1.83
91.20 11
0.92
74.73 11
4.19
85.18
2.04
64.98
7.62