AQ_F_0400045_20120612_CMPL_InspRpt

NORTH CAROLINA DIVISION OF Fayetteville Regional Office
AIR QUALITY Hildreth Septic Tanks
NC Facility ID 0400045
hispection Report County/FIPS: Anson/007
Date: 06/13/2012
Facility Data Compliance Data
Hildreth Septic Tanks Inspection Date 06/12/2012
City Pond Road-SR 1142 Inspector's Name Cindy Grimes
Wadesboro,NC 28170 Operating Status Operating
Lat: 34d 55.4970m Long: 80d 5.9570m Compliance Code Compliance- inspection
SIC: 3273/Ready-Mixed Concrete Action Code FCE
NAICS: 32732/Ready-Mix Concrete Manufacturing On-Site Inspection Result Compliance
Contact Data Permit Data
Facility Contact Authorized Contact Technical Contact Permit 08715/G02
Karl Hildreth Karl Hildreth Karl Hildreth Issued 10/17/2008
Owner Owner Owner Expires 9/30/2013
[phone] [phone] [phone] Classification Small
Permit Status Active
Inspector's Signature: Comments:
Date of Signature: 2_ —
MACT/GACT Applicability: None(Not subject to: 4Z RICE—Reciprocating Internal Combustion Engines-
there are no generators on site).
1) Location
Hildreth Septic Tanks is located on City Pond Road,south of Wadesboro, in Anson County. Actual address
of office is 175 Hildreth Road, Wadesboro,NC.
Directions
From FRO,take Hwy 401 South to Wagram. Turn right at Old Wire Road (Hwy 144) and go— 11 '/2 m i les to
Laurel Hill.Turn right at Hwy 74 and go west—35 miles to Wadesboro. Continue thru the city until you get
to Hwy 109 South. Turn left onto Hwy 109 South/Hwy 742 South, and continue following 1-lwy 109 South
when it splits off from Hwy 742. Go—2 miles and turn left onto City Pond Road(SR 1142). Go— 1 m i le and
Hildreth Septic Tanks and Ready Mix will be on the left. Enter production plant at the first driveway of
property to the left,and enter office through the second drive to the left,which is Hildreth Drive(once you
turn onto drive,office is in what appears to be an aluminum sided body shop,to the right behind the first
house on the drive).
Safety considerations: Standard DAQ safety equipment.Watch for truck traffic,although this is a small
facility,and there's usually not a lot of traffic at one time.
2) Facility and Process Description
Hildreth Septic Tanks is a small batch concrete plant that also produces residential septic tanks. This
facility is permitted under Air Permit No.8715G02, effective from 17 October 2008 until 30
September 2013. Cindy Grimes conducted the last compliance inspection on 21 June 2011.
Hildreth Septic Tanks is a batch concrete plant. Cement is stored in a silo and mixed with aggregate
(stockpiled on site), sand (stockpiled on site), and water inside a cement truck.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 clays.
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.

a) Permitted Sources
One Concrete batch plant with fabric filter air pollution control system(s) installed on all sources;
1. One(1)cement mixing weigh hopper and loading operation; and,
2. Silos for cement and flyash storage.
b) Insignificant/Exempt Activities
Source of Source of Title V
Source Exemption Regulation TAPs? Pollutants?
I-1 -sand and aggregate handling 2Q.0102(c)(2)(E)(i) No Yes
c) Throughputs for 2011
Employees: 5 (including drivers)(same in 2010)
Hours: 8:00 AM—5:OOPM(same in 2010)
Production: 3,272 yds3(3,668 yds3 in 2010)
3) Inspection Conference
On 12 June 2012, I (Cindy Grimes) arrived at Hildreth Septic Tanks to conduct a compliance inspection. I
initially went to the concrete batch area of the site, but there was no activity there. hthen drove up to the
office and spoke with Mrs. Hildreth,who said that Mr. Hildreth,the Facility Contact and owner, was
working off site and not in the area. Mrs. Hildreth and I discussed the following:
a) Verified the FACFINDER information; Mr. Hildreth is the sole,contact for all data.
b) I checked the maintenance logbook,which contained accounts of daily truck load outs and monthly
records of baghouse inspections,which Mr. Hildreth performs. There were a few notes on days where
there were maintenance issues. Business has been relatively slow over the last year.
c) Next year's (2013) inspection will be for permit renewal, so an inspector will call and set a date and
time to meet with Mr. Hildreth to assist with the renewal forms and emissions inventory submittal_
4) Inspection Summary
This facility was not operating while I was on site, as it currently operates only sporadically a few times
per week for a short time. I observed the following:
a) I was able to review the logbook,which had current entries.
b) There appeared to be no dust on surrounding properties and/or vegetation.
c) There appeared to be no new sources or modifications at the operating plant.
d) I did not notice any leaks or holes in the bagfilters or associated ductwork,nor did I observe any
dust accumulations around the loading area or storage silos.
5) Permit Stipulations
a) A.3 2D.0515 PARTICULATE CONTROL REQUIREMENT-Particulate matter emission rates
shall not exceed>30 tons/hour.
Compliance Indicated—Latest permit review shows compliance.

b) AA 2D .0521 VISIBLE EMISSIONS CONTROL REQUIREMENT- Visible emissions from sources
manufactured after July 1, 1971 shall not be >20%opacity and from sources manufactured as of July 1,
1971,VE shall not be more than 40% opacity.
Compliance Indicated—This facility was not operating;therefore,I observed 0%VE.
c) A.6 2D .0540 FUGITIVE DUST CONTROL REQUIREMENT-Permittee shall not allow fugitive
dust emissions to cause or contribute to complaints/excessive emissions beyond the facility's boundary.
Compliance Indicated—I did not observe any fugitive dust emissions during my inspection.
d) A.7 2D .0611 FABRIC FILTER REQUIREMENT—Particulate matter emissions from permitted
equipment shall be controlled by fabric filters,with recordkeeping of regular inspections and maintenance.
Compliance Indicated—I reviewed the logbook,which contained entries with any maintenance
issues that have occurred.
e) A.8 2D .1104 TOXICAIR POLLUTANT CONTROL REQUIREMENT—Facility shall not emit
arsenic that may cause an exceedance of the acceptable ambient level; minimum distance to property
line shall determine the maximum concrete production rate(35,000 yds3 for 75 feet); there shal I be a
minimum distance to property line identification marker;Permittee shall record daily and monthly
concrete processed;Permittee shall submit summary report by March 1 of each year.
Compliance Indicated—I verified property line marker to be 75 feet; total concrete production in
2011 was well below the maximum 35,000 yds3; production records appear to be compliant; annual
report was submitted on time and compliant.
0 A.9 2Q .0310 GENERAL PERMIT CRITERIA—The Permittee shall only operate permitted
emissions sources; facility must be located in listed counties; maximum hourly throughput at truck
loadout must be< 138 yds3/hour; facility must not produce more concrete than allowed based on
"minimum distance marker".
Compliance Indicated—Facility is only operating permitted sources, facility is located in Anson
County, latest permit review shows maximum throughput for facility is much lower than 138 yds3/1,our,
and latest annual report shows compliance.
g) A.10 2Q .0711 TOXIC AIR POLLUTANT EMISSIONS LIMITATIONS—Each TAP 1 isted for
permit may not exceed TPERs(Beryllium<0.28 lbs/yr, Cadmium<0.37 lbs/yr, Chromium<
0.0 13 lbs/day,Manganese/compounds<0.63 lbs/day, and Nickel metal<0.13 lbs/day).
Compliance Indicated—TPERs appear not to have been exceeded,based on current production
rates at facility.
6) Reporting Requirements
Annual report due March 1, showing compliance with 2D .1104; latest report was compliant and submitted
on time.
7) 112R Status
This facility neither uses nor stores chemical compounds that require a written risk management plan
under the Clean Air Act, Section 112R.
8) DAQ Compliance History
a) 28 May 2010—NOV for late reporting
b) 9 October 2008—NOV for"Installing New Control Device without Air Permit Modification"
9) Comments and Compliance Statement
Since this facility only operates sporadically, it is difficult to observe it doing so.The 2013 permit renewal
inspection will be pre-arranged, so it is possible that the facility will be able to arrange a load out then.
Hildreth Septic Tanks appeared to be in compliance on 12 June 2012.
/clg