AQ_F_0400045_20110621_CMPL_InspRpt

NORTH CAROLINA DIVISION OF Fayetteville Regional Office
AIR QUALITY Hildreth Septic Tanks
NC Facility ID 0400045
Inspection Report County/FIPS: Ansonf007
Date: 06/23/2011
Facility Data Compliance Data
Hildreth Septic Tanks Inspection Date 06/21/2011
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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: 'l pf I r
MACT/GACT Applicability: None(there are no generators on site to be subject to 4Z RICE).
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(Hwy144)and go- 11 '/2 miles 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 Hwy 109 South when it
splits off from Hwy 742. Go-2 miles and turn left onto City Pond Road (SR 1142). Go- l mile 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 tAcility is
permitted under Air Permit No.8715G02,effective from 17 October 2008 until 30 September 2013.Cindy
Grimes conducted the last compliance inspection on 8 July 2010.
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 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.

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 Exem tion Re ulationPTAPs?
ource of Source of Title V
p g Pollutants?
I-1 - sand and aggregate handlin 2 0102 c 2 E i No Yes
_ g Q O( )( )0)
c) Throughputs for 2010
Employees: 5 (including drivers)(same in 2009)
Hours: 8:00 AM—5:OOPM(same in 2009)
Production: 3,668 yds3 (916.5 yds3 in 2009)
3) Inspection Conference
On 21 June 2011, 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.I then drove up to the office
and spoke with an employee,who told me that Mr.Hildreth,the Facility Contact,was working off site and not
in the area. I asked to see the maintenance logbook, which is kept in the office area, and after a few minutes,
we were able to find the logbooks. They contained accounts of all the 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 slow but has picked up some over the last year.
4) Inspection
This facility was not operating while I was on site,as it currently operates only about once a week.I observed
the following:
a) I was able to review the logbooks, and they 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.
5) Permit Stipulations
a) A.3 2D.0515 PARTICULATE CONTROL REQUIREMENT-Particulate matter emission rates shall
not exceed>30 tons/hour.
n Compliance—Latest permit review .
b) A.4 2D .0521 VISIBLE EMISSIONS CONTROL REQUIREMENT- Visible emissions from sources
manufactured after July 1, 1971 shall not be >20%opacity.Visible emissions from sources manufactured
as of July 1, 1971 shall not be more than 40%opacity.
In Compliance—This facility was not operating,therefore,I saw 0%VE.
c) A.6 2D .0540 FUGITIVE DUST CONTROL REQUIREMENT-The Permittee shall not allow fugitive
dust emissions to cause or contribute to complaints or excessive emissions beyond the facility's boundary.
In Compliance—I did not observe any fugitive dust emissions during my inspection.

d) A.7 2D .0611 FABRICFILTER REQUIREMENT—Particulate matter emissions from the permitted
equipment list shall be controlled by fabric filters, with recordkeeping of regular inspections and
maintenance.
In Compliance—I reviewed the logbooks,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
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distance to property line identification marker; Permittee shall record daily and monthly concrete
processed; Permittee shall submit sununary report by March 1 of each year.
In Compliance—I verified property line marker to be 75 feet;total concrete production in 2010 was we]l
below the maximum 35,000 yds3;production records appear to be compliant; annual report was submitted
on time and compliant.
f) 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
In Compliance—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/hour, and latest annual
report shows compliance.
g) A.10 2Q .0711 TOXICAIR POLLUTANT EMISSIONS LIMITATIONS—Each TAP listed for perm it
may not exceed TPERs(Beryllium<0.28 lbs/yr, Cadmium<0.37 lbs/yr, Chromium<0.0 13 lbs/clay,
Manganese/compounds<0.63 lbs/day, and Nickel metal<0.13 lbs/day.
In Compliance—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.
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.Perhaps the next inspection in
2012 should be pre-arranged with Mr. Hildreth,when he knows of any truck load outs that will be occurring.
Hildreth Septic Tanks appeared to be in compliance on 21 June 2011.
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