AQ_F_0400045_20160908_CMPL_InspRpt

- NORTH CAROLINA DIVISION OF Fayetteville Regional Office
AIR QUALITY Hildreth Ready Mix,LLC
NC Facility ID 0400045
Inspection Report County/FIPS:Anson/007
Date: 09/13/2016
Facility Data Permit Data
Hildreth Ready Mix,LLC Permit
878 City Pond Road-SR 1142 Issued
Wadesboro,NC 28170 Expires
Lat: 34d 55.4970m Long: 80d 5.9570m Classification
SIC: 3273/Ready-Mixed Concrete Permit Status
NAICS: 32732/Ready-Mix Concrete Manufacturing Current Permit Application(s)None
Contact Data Program Applicability
Facility Contact Authorized Contact Technical Contact SIP
Karl Hildreth Karl Hildreth Karl Hildreth
Owner Owner Owner
[phone] [phone] [phone]
Compliance Data
Comments:
Inspection Date 09/08/2016
_ Inspector's Name Joshua L.Harris
Inspector's Signature: ��j�; ` Operating Status Operating
3� Compliance Code Compliance-inspection
Action Code FCE
Date of Signature: On-Site Inspection Result Compliance
Total Actual emissions in TONS/YEAR:
TSP S02 NOX VOC CO PM10 *11"
2012 0.7200 --- --- --- 0.2200 0.0610
2007 0.8240 --- --- --- 0.2410 0.0700
*Highest HAP Emitted(in pounds)
Five Year Violation History:None
Date Letter Type Rule Violated Violation Resolution Date
Performed Stack Tests since last FCE:None
Date Test Results Test Method(s) Source(s)Tested
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I. DIRECTIONS TO SITE: In Wadesboro,take Hwy 742 south for 3.5 miles to City Pond Road and turn
right. Hildreth Ready Mix is approximately 2 miles on the right. If no one is at the plant,take Hildreth
Road,which is just past plant, up to the office on the right.
II. SAFETY: Standard FRO safety gear is required. The inspector should be mindful of vehicular and
heavy equipment traffic. i
III. FACILITY/PROCESS DESCRIPTION: Hildreth Ready Mix is a small concrete batch plant. Cement
is stored in a silos and mixed with aggregate and sand(both stockpiled on site),all of which is mixed with
water inside a cement truck. The loadout, and two of the three silos are controlled by a central dust
collector,one of these two silos has its own baghfilter in series with the central dust collector;the third
silo is controlled by a single, dedicated bagfilter. To produce the septic tanks, cement is poured into
1,000-gallon, 1,200-gallon, or 1,500-gallon molds and allowed to cure for 28-30 days. The molds are
removed and septic tanks are delivered and installed on site.Although septic tanks are still produced on
site,most of Mr.Hildreth's business now is delivering concrete from his batch plant,which is operated on
an"as needed"basis.
The facility requested to have the air quality permit rescinded on 01 July 2016 under the newly adopted
2Q .0102(d)exemption. The facility's permit was rescinded on 19 July 2016. The rescission request was
granted based on calculations which assume the facility's emission sources are controlled by bagfilters
which are properly maintained and operated.
Throughputs:
Operating hours 0800-1700 Monday-Friday w/
occasional Saturday
Employees 5 including drivers
Production(cu yd) 2015: 7,972.5
2014: 6,000
2013: 2,000
2012: 3,397
2011: 3,272
IV. INSPECTION SUMMARY: On 08 September 2016,Mike Lawyer,FRO DEMLR,and I,Joshua Harris
FRO DAQ, arrived on site to conduct a multimedia inspection of Hildreth Ready Mix, LLC. We met
Karl Hildreth, Owner,and Chanel Little, Secretary,in the facility's office. Mr.Hildreth verified the
FacFinder information, and noted no changes. We began discussing the current process DAQ is using
regarding inspections for facilities which have rescinded their air permits, and Mr.Hildreth stated that he
did not want to rescind his permit. I informed him that the permit was already rescinded, and that a letter
requesting rescission was received. We were able to locate copies of the original request documents, for
registration and rescission,that were submitted to DAQ. Mr. Hildreth reiterated that he did not want to
rescind the permit, and would like to have the permit reissued.
After the rescission discussion,we attempted to locate the facility's production records and the
maintenance records for the bagfilters. Ms. Little was able to provide the requested production records,
but Mr.Hildreth stated that he does not keep records of maintenance conducted on the bag houses. He
stated that every two months,be removes the bags,washes them,cleans out the bag house,and reinstalls
the bags. I reminded Mr.Hildreth that when his permit is reinstated,he will be required to keep records
for inspections and maintenance performed on the facility's bagfilters. Mr.Hildreth stated that he
understood and would start keeping those records. We then toured the batch plant.

The facility was not operating at the time, but Mr. Hildreth pointed out how each source is controlled, and
pointed out each emission point. We asked if there are any visible dust emissions while the plant is
operating, and Mr. Hildreth stated that some dust will come out of the enclosure during loadout, but that
there is never any dust visible at the baghouse exhausts. After touring other parts of the property for the
stormwater inspection,we departed.
V. EQUIPMENT ON SITE:
A. One weigh hopper and loadout operation;
B. Three silos for cement storage; and
C. Sand and Aggregate stockpiles and handling equipment.
VI. APPLICABLE AIR QUALITY REGULATIONS:
A. 15A NCAC 2D .0515—PARTICULATES FROM MISC.INDUSTRIAL PROCESSES—
Particulate emissions shall not exceed allowable emission rates as calculated by the following
equations:
E=4.10 * (P)0 67 for P<30 tons/hr, or
E= 55 * (P)011-40 for P>30 tons/hr
APPEARED IN COMPLLANCE: These calculations were made when the facility was permitted,
and the previous permit reviews indicated that that facility, when controls are properly maintained
and operated, would not exceed these limits. The facility's particulate emissions are controlled by
bagfilters. Each bagfilter appeared to have regular maintenance conducted, and there were no dust
accumulations near their exhaust points which would indicate an operational problem.
B. 15A NCAC 2D .0521 —CONTROL OF VISIBLE EMISSIONS—Visible emissions shall not
exceed 20%opacity.
APPEARED IN COMPLLANCE: The facility was not operating at the time of the inspection. Mr.
Hildreth stated that he does not see visible emissions while the plant is operating, outside of
occasional fugitive emissions at loadout, and that he hasn't received any recent dust complaints.
DAQ has not received any recent complaints pertaining to this facility.
C. 15A NCAC 2D .0535—NOTIFICATION REQUIREMENT—Notify DAQ in the event of excess
emissions lasting longer than 4 hours resulting from malfunctions,breakdowns, or abnormal
conditions.
APPEARED IN COMPLIANCE: There are no indications of any excess emissions which would
require a notification by the facility. Mr. Hildreth eagerly pointed out that there are no dust
j accumulations near the baghouse exhausts. There have been no recent complaints received by the
facility or DAQ.
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D. 15A NCAC 2D .0540—PARTICULATES FROM FUGITIVE DUST EMISSION SOURCES—
Fugitive dust emissions shall not contribute to substantive complaints, or excessive dust emissions
across the property boundary.
APPEARED INCOMPLL4NCE. No fugitive dust concerns at the property boundaries were noted
during the inspection, though the facility is located just off of the street. The facility was not
operating at the time of the inspection, and we did not observe a truck loadout. There have been dust I
complaints in the past associated with the truck loadout, but none have been received by DAQ in the j
past year. Mr. Hildreth stated that he has received past dust complaints which prompted him to
upgrade his dust collection system. The system was observed in operation during the previous
inspection, and visible emissions at the loadout were noted to be—10%opacity at that time.
VIL NON-COMPLL4,NCE HISTORY SINCE 2010:
03/28/16 NOD issued for late annual reporting.
05/28/10 NOV issued for late annual reporting.
VHI. RISK MANAGEMENT (112r): This facility does not use or store any 112(r) subject materials above
threshold limits. Therefore, it is not required to maintain a written Risk Management Plan(RMP).
IX. CONCLUSION AND RECOMMENDATIONS:
- Hildreth Ready Mix,LLC. appeared to be IN COMPLIANCE with applicable air quality
regulations on the date of inspection.
PINK SHEET ADDITIONS:
None.
/jlh