76-04_INSP_20221117

FACILITY COMPLIANCE INSPECTION REPORT
Division of Waste Management
Solid Waste Section

Page 1 of 4
UNIT TYPE:
Lined MSWLF LCID YW Transfer Compost X SLAS COUNTY: Randolph
Closed MSWLF HHW White goods Incin T&P FIRM PERMIT NO.: 76-04
CDLF Tire T&P / Collection Tire Monofill Industrial Landfill DEMO SDTF FILE TYPE: COMPLIANCE

Date of Site Inspection: November 17, 2022 Date of Last Inspection: November 18, 2021
FACILITY NAME AND ADDRESS:
North Carolina Zoological Park – Small Type 3 SWC Facility 4401 Zoo Parkway
Asheboro, NC 27205 GPS COORDINATES: Lat.: 35.61908 Long.: -79.74874 FACILITY CONTACT NAME AND PHONE NUMBER:
Jody Stancil, Curator of Exterior Horticulture w. 336-879-7420
[e-mail]
FACILITY CONTACT ADDRESS:
North Carolina Zoological Park
Jody Stancil, Curator of Exterior Horticulture 4401 Zoo Parkway
Asheboro, NC 27205
PARTICIPANTS: Chuck Kirchner, Environmental Senior Specialist – Solid Waste Section (SWS) Robert Pike, Environmental Senior Specialist – Solid Waste Section (SWS)
John Ledbetter, Supervisor II - North Carolina Zoological Park
George Adams, Grounds Worker II - North Carolina Zoological Park STATUS OF PERMIT:
Permit To Operate (PTO) issued May 23, 2016
PTO renewal application submitted on May 27, 2020 currently under review PURPOSE OF SITE VISIT:
Comprehensive Inspection STATUS OF PAST NOTED VIOLATIONS:
None OBSERVED VIOLATIONS:
None

FACILITY COMPLIANCE INSPECTION REPORT
Division of Waste Management
Solid Waste Section

Page 2 of 4
ADDITIONAL COMMENTS
On November 17, 2022, Chuck Kirchner and Robert Pike met with John Ledbetter and George Adams to conduct a comprehensive inspection of the North Carolina Zoological Park – Small Type 3 Solid Waste Compost Facility located at the North Carolina Zoological Park in Asheboro, Randolph County. 1. The facility is a Small Type 3 Solid Waste Compost (SWC) operation located at the North Carolina Zoological Park. 2. The facility permit, site plan, and operations plan were discussed. 3. The facility is not accessible to the public. Only zoo personnel have access to the facility. 4. The facility is in operation from 7:00 am to 4:00 pm, weekdays. 5. Material composted originates at the North Carolina Zoological Park. The facility produces compost from the
following feedstocks: animal manure, animal bedding, food waste, and yard waste. The following may also be added to the compost mix: paper, cardboard, compostable utensils, dredged soil from the compost site sediment basin, and animal incinerator ash.
6. Compost site is accessed from a gravel road behind the greenhouses south of the administrative/maintenance buildings located off the Panther Creek Road service entrance. 7. Records are kept in the new Horticulture Building located adjacent to the service building off Panther Creek
Road. 8. Material brought to the compost area from different areas around the zoo is recorded in a logbook located at an entrance booth at the compost site. Zoo personnel designate if the material is animal waste, horticulture waste or food waste. Zoo personnel then indicate how much waste was brought to the compost site by indicating what type of vehicle the waste was delivered in and how many loads were brought on site. The zoo personnel then initial their entry. This data is collected into a spreadsheet by Mr. Adams to keep a track of how much material is received at the compost facility. 9. The compost created is used at the North Carolina Zoological Park in public areas, construction sites within the zoo, non-public areas and in animal exhibits. A new Asia exhibit is currently under construction and is expected to use a large quantity of compost material according to Mr. Ledbetter. 10. Incoming material is stored in a pile until enough is obtained to create a windrow. A new windrow is generally
formed monthly according to Mr. Adams. 11. The active compost area currently has five small active windrows/piles. 12. The windrows are rotated from the front of the active compost area to the rear southeast corner.
13. Once an active windrow temperature comes down to ~110℉ it is moved into a completed windrow pile. Once six completed windrows are gathered the compost pile is tested for heavy metals and fecal coliform. 14. Once the finished compost testing comes back within limits the finished compost is then screened to remove any large material and moved to the finished product stockpile. 15. Mr. Adams stated that on June 30, 2022 the Compost Facility had 4,470 tons of finished compost on site. 16. Composting regulations Small Type 3 Compost Facilities requires that temperature data is recorded for at least 15 days maintained at 131° F or greater. Windrows shall be turned at least 5 times during the high temperature recordation period.

The item(s) listed above were observed by Section staff and require action on behalf of the facility in order to come into or maintain compliance with the Statutes, Rules, and/or other regulatory requirements applicable to this facility. Be advised that pursuant to N.C.G.S. 130A-22, an administrative penalty of up to $15,000 per day may be assessed for each violation of the Solid Waste Laws, Regulations, Conditions of a Permit, or Order under Article 9 of Chapter 130A of the N.C. General Statutes. Further, the facility and/or all responsible parties may also be subject to enforcement actions including penalties, injunction from operation of a solid waste management facility or a solid waste collection service and any such further relief as may be necessary to achieve compliance with the North Carolina Solid Waste Management Act and Rules.
FACILITY COMPLIANCE INSPECTION REPORT
Division of Waste Management
Solid Waste Section

Page 3 of 4
17. The facility maintains windrow temperature records in a logbook at the compost facility booth. Records were observed for windrow temperatures obtained November 16, 2021 through November 14, 2022. Records also document the windrow turning requirements.
18. The facility uses a long stem stainless steel thermometer to obtain temperature readings from the compost windrows. 19. Records were observed for compost temperature probe calibration. Thermometer calibration was last conducted on June 21, 2022. The facility calibrates the thermometer two times per year. Calibration records should indicate any adjustments made to the thermometer and include the initials of the personnel conducting the calibration. 20. Mr. Adams stated that windrow temperatures are obtained soon after [windrow] construction and that
temperatures and windrow turning are recorded throughout the high temperature period and thereafter. 21. The facility considers active composting to be complete in ~ 4 months. Cured compost is obtained in ~ 10 months/an additional 6 months after the completion of active composting. 22. Material to be cured is brought to the compost storage area located at the north side of the facility. 23. Additional equipment from other parts of the zoo is available for use if the Komatsu Loader used at the compost facility breaks down according to Mr. Adams. 24. Mr. Ledbetter stated the zoo received a new screener in February of 2022. The screener is used to help reduce large material in the finished product. Woody material removed from the compost pile is moved to a material storage area near the Administration Building next to the N. American zoo entrance. 25. Adequate fire lanes were observed around all windrows and stockpiles. It appears fire equipment can access all sides of combustible material in the event of a fire.
26. Mr. Adams stated that parasitic wasps are still being used on site for fly reduction. Wasp eggs are sprinkled on the compost pile from May through October. The wasps eat fly larva in the compost. 27. The facility annual report (FAR) was received by the SWS dated July 28, 2022. Material received for July 2021
through June 2022 is 1,668 tons. The amount of compost created is 532 tons, the amount used is 101 tons, and the amount stockpiled is 431 tons. 28. Compost shall be analyzed at intervals of every 20,000 tons or every six months, whichever comes first. Mr.
Adams stated that the compost is analyzed every six months. 29. No odors were observed on site during the inspection. 30. Mr. Adams stated that the site had never received an odor complaint. 31. Manmade inerts screening records were observed. 32. Metals concentration testing is conducted by the North Carolina Department of Agriculture & Consumer Services -Agronomic Services Division. Records observed for February 4, 2022 and July 8, 2022 indicate concentrations below limits. 33. Mr. Ledbetter stated that the facility has never had any problems with elevated heavy metal results, however, if there were unacceptable heavy metal levels the facility plans to dispose of the compost at an appropriate waste management site. 34. Fecal Coliform testing conducted by Meritech, Inc. in Reidsville, NC observed for January 27, 2022 and July 27,
2022. Records indicate concentrations below limits.
35. Mr. Ledbetter stated that any compost that tested positive for fecal coliform would be tested a second time to confirm the results. After the second testing, the compost would be introduced into new feedstock and go through
the PFRP process again. 36. The facility is maintained to prevent the accumulation of stormwater and leachate on composting areas, storage areas, and roads. All areas observed during this inspection appeared to have positive flow to the basin. No standing water observed this inspection. 37. The sediment basin has a non-discharge pump piped to the City of Asheboro Wastewater Treatment Plant. This is covered under the City of Asheboro Industrial User Permit #6084, expiration date of July 29, 2027.

FACILITY COMPLIANCE INSPECTION REPORT
Division of Waste Management
Solid Waste Section

Page 4 of 4
38. The sediment basin has a riser pipe that drains to an adjacent spillway. The non-discharge pump continually maintains the sediment basin freeboard at 24” below the riser pipe. 39. The East Side Fire Department can be contacted to address an emergency at the facility. 40. Fire lanes are maintained. 41. Access roads are of all-weather construction.
42. The facility is secured by a locked gate. 43. The facility has proper signage. 44. The PTO expiration date was June 23, 2020. 45. The PTO renewal application was submitted to the SWS on May 27, 2020. 46. Permit renewal is currently under review.
Please contact me if you have any questions or concerns regarding this inspection report. ________________________________________ Phone: [phone] _
Chuck Kirchner Environmental Senior Specialist
Regional Representative
Sent on: November 18, 2022 X Email Hand delivery US Mail Certified No. [ _]
Copies: Deb Aja, Western District Supervisor - Solid Waste Section Donna Wilson, Engineering Project Manager – Solid Waste Section John Ledbetter, Horticulture Technician – NC Zoo