NC0044725_Technical Assistance_20070308

Michael F: Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek. P.E..Director
Division of Water Quality
March 8, 2007
Charles Vandenberg
Laurinburg Maxton Airport Commission WWTP
16701_ Airport Road
Maxton, N.C. 28364
Subject: Technical Assistance Report
NPDES Number.N00044725
Scotland County
Dear Mr. Vandenberg,
This is to document that technical assistance has been given regarding the operation of the LMAC
Wastewater Treatment Facility's aerobic digester on March 2, 2007. The technical assistance was
conducted by telephone and on site, to: give recommendations, regarding the proper operation and
dewatering of the digester. Additional .lab testing, such as daily MLSS and RAS TSS would be
beneficial in addition to the tests that are already -analyzed,
As'always, you are to be commended for requesting assistance when. needed in order to protect
water quality by achieving permit compliance at all times. See the attached technical assistance
summary for the details that were discussed and I look forward to receiving the weekly FAX data.
If you have questions concerning this report or if this office can be of additional assistance, please
contact me at 910-433-3309.
Sincerely,
Don Register
Wastewater Treatment Consultant
Cc: Paul Davis, Manager, LMAC
Jerry Rimmer, Technical Assistance Supervisor
FRO files
North Carolina Division of Water Quality
Internet: ncwaterquality.org
One
NorthCarolina
Naturally
225 Green Street —Suite 714 Fayetteville, NC 28301-5043 Phone [phone] Customer Serv.ice
FAX [phone]
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United States Environmental Protection Agency
E PA Washington, D.C. 20460
Water Compliance Inspection Report
Form Approved.
OMB No. 2040-0057
Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection
1 I NI 2 1 51 31 NC0044725 1 11 121 07/03/02 117
Type Inspector Fac Type
181 DI 191 31 201 1
Remarks
21111IIIIII11111III1IIIIIIIIII111111111111IIIIIII66
Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA Reserved
67 1 3. 0 169 701 II 71 I1 721 N I 731 1 1 74 751 1 1 1 1 1 1 1 80
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
POTW name and NPDES permit Number)
Laurinburg Industrial WWTP
NCSR 1434
Maxton NC 28364
Entry Time/Date
10:30 AM 07/03/02
Permit Effective Date
05/06/01
Exit Time/Date
12:00 PM 07/03/02
Permit Expiration Date
09/07/31
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
///
Charles Gerard Vandenberg/ORC/910-844-5061i
Other Facility Data
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Paul G Davis,16701 Airport Rd Maxton NC 28364//910-844-5081/910844968d6
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Other
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers
:. :..._.
Don Register0471
Date •
3-Z-07
24;"2:4;
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
�l►tidei) / t .3 b` - 0 i
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page # 1

NPDES
NC0044725
111 121
yr/mo/day Inspection Type (cont.). 1
07/03/02 I17 18IDI
Section D: Summary. of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Technical assistance was requested by.Charles Vandenburg regarding the proper way to supe,rnant an -
aerobic digester. Prior to. my arrival, Charles had turned the blower off and allowed the sludge to settle for
approximately 3-4 hours. Foam was covering the sludge surface making"it difficult to see the clear
supernant. The telescopic valve was lowered to begin the dewatering operation, but the valve began
drawing off the foam first and then the clear water was exposed. The supernant was removed from the
digester reducing the volume by approximately 18" (48,000 gallons). The supernant was removed to a level
as low as the. telescopic valve would adjust. There was still clear water at the surface, so I told Charles that
he could start wasting to.the digester and as.he pumps in the clear water will.over flow the valve. This
would be the maximum the digester could be decanted before the blower is turn ,on. We discussed that
decanting .in the digester is, the•proper way to thicken the sludge for disposal' in the drying beds, land
application, -etc. and not by•storing in the treatment plant. Leaving the air turned 'off of the system for an
extended time was discussed and the problems that septic sludge can cause. It was also discussed the
importance of good records and the accountability of all supernants and residuals.
ALWAYS REMEMBER THAT EFFLUENT COMPLIANCE BEGINS WITH PROPER SOLIDS
MANAGEMENT
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t
Permit: NC0044725 Owner - Facility: Laurinburg Industrial WWTP
Inspection Date: 03/02/2007 Inspection Type: Technical Assistance
Other
Comment:
Yes No NA NE
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