WQ0000672_Permit Renewal_20011128

MEMORANDUM
TO:
Muffe]Tl
SUBJECT:
November 28,,2001
Kim Colson, Unit Supervisor
Non -Discharge Permits and Engineering Unit J
Grady Dobson, Environmental Engineer
Fayetteville Regional Office
Sludge Permit Renewal
City of Lumberton
Permit No. WQ0000672
Lumberton, North Carolina
Robeson County
Please find enclosed the staff report regarding issuance of the subject Permit.
If you have any questions or require any further information, please advise.
GD/bs
Enclosure

SOC PRIORITY PROJECT Yes_ No X
To: Permits and Engineering Unit
Water Quality Section i
Attention: J. R. Joshi
Date: November 28, 2001
NON -DISCHARGE STAFF REPORT AND RECOMMENDATION
County: Robeson
Permit No. WQ 0000672
PART I - GENERAL INFORMATION
1. Facility and Address: City of Lumberton
PO Box 1388
Lumberton, NC 28359
2. Date of Investigation: November 15, 2001
3. Report Prepared by: Grady Dobson
Environmental Engineer, FRO
4. Persons Contacted and Telephone Number: Scott Berg
Soils & Materials Engineering (S&ME)
336-288-7180
5. Directions to Site: See application package.
6. Size (land available for expansion and upgrading):
In this application package, 1,506 acres for land application of residuals will be available upon
approval of the submitted package.
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7. Topography (relationship to 100 year flood plain included): See package
Attach a U.S.G.S. map extract and indicate facility site.
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U.S.G.S. Quad No.: U.S.G.S. Quad Name:
see package see package
Latitude: Longitude:
see package see package
8. Any buffer conflicts with location iof nearest dwelling and
water supply well? Yes_ No X If Yes, explain:

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PART I - GENERAL INFORMATION (continued)
9. Watershed Stream Basin Information: N/A previously approved
a. Stream Classification: N/A
b. River Basin and Subbasin No.: N/A
c: Distance to surface water from disposal system: N/A
PART II - DESCRIPTION OF WASTES AND TREATMENT WORKS
1. a. Volume': 10.0 MGD (Design Capacity)
Residuals: 1900 Dry Tons per year
b. Types and quantities of industrial wastewater:' 1500 DT - WWTP
400 DT - WTP
1900 DT -,Total
C. Pretreatment Program (POTWs only): See NPDES Staff Report
in development _ approved X
should be required _ not needed
2. Treatment Facilities: See NPDES Staff Report and Authorization to Construct
a: What is the current permitted capacity of the facility? 10 MGD
b. What is the actual treatment capacity of the current facility (design volume)? (10 MGD)
(6.5 mgd is currently the average monthly flow)
C. Please provide a description - of existing or substantially constructed wastewater
treatment facilities: See NPDES Staff Report
d. Please provide a description of proposed Wastewater treatment facilities: N/A
3. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DWQ Permit No.. •
Residual'Contractor:, Soils and Materials Engineering (S&ME)
Telephone Number: 336-288-7180
b. Residuals stabilization: PSRP X PFRP Other
c. Landfill: N/A
d. Other disposal/utilization scheme (Specify): N/A

PART II -.DESCRIPTION OF WASTES AND TREATMENT WORKS (continued)
4. Treatment plant classification (attach completed Rating Sheet): Grade IV
5. SIC Code(s): See NPDES Staff Report
Primary 01 Secondary 55 5958
Main Treatment Unit Code: 0 5 0 0 3
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grants Funds (municipals only)? N/A
2. Special monitoring or limitations (including toxicity) requests: N/A
3. Important SOC, JOC or Compliance Schedule dates (please indicate):
j Date
Submission of Plans and Specifications N/A
Begin Construction N/A
Complete Construction i N/A
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4. Other Special Items:
Soils Information:
The submitted land application renewal package is for the net average of 1506 acres. I In Section
IV of the Permit Renewal Package, all acreage with land owner agreements, maps, etc., are
included. It is our recommendation that the sites listed in this section be included in[the. Permit
renewal. Mr. Vincent Lewis, Soil Scientist, Division of Soil & Water, Wilmington 'Regional
Office, concurs with the soil type and usage restrictions (if any) provided in the application
package.
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Land Limiting Constituent Analysis:
The subject Permit renewal is primarily to modify and delete field segments, and
approval of 1,506 net acres. The waste sludge is generated from two (2) different sources
within the City of Lumberton. The waste sludge sources follow:
(1) Alum sludge from the City of Lumberton's WTP (400 DT @ 3.292% solids)
(2) Municipal sludge for the City of Lumberton's WWT Plant (1500 DT l@ 3.68%
solids)
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PART III ' - OTHER PERTINENT INFORMATION
The annual combined total of the two (2) facilities is 1900 Dry Tons. The percentage of
sludge volume per facility is broken down as follows:
(1) City of Lumberton WWTP 79% - 1500 DT
(2) City of Lumberton WTP 21 % - 400 DT
100% - 1900 DT
These percentages are utilized to calculate weighted averages for the various
concentrations of the sampled paraineters. An example of a weighed average for the
TKN (PPM Dry Weight) is as follows:
City. of Lumberton WWTP (79%) + City of Lumberton WTP (21 %)
TKN (49,500) .79 mg/kg +
TKNN - (39,105) +
TKN = 42,948 mg/kg
Ammonia - N 1.600 mg/kg (.79)
i264 + 21
i8,300 mg/kg (.21)
(3843)
is
Ammonia - N - -1.285 mg/kg
NO3 - NO2 - N .79 (21' mg/kg) +
16.59 +
NO3 - NO2 = N = 30.24 mg/kg
PAN = MR (TKN - Ammonia)
_ .30 (49948 = 1285)
14599 + 642'.5 + 30.24
100 mg/kg (.21)
.21 (65 mg/kg)
13.65
+ .5 (Ammonia) + NO3 - NO2 - N
+ .5 (1285). + 30.24
= 14599 + 643 + 30
PAN = -15272 mg/kg • x ' .002 30.5
30.54 x 1900 DT = 58034
PAN = 58,034 lbs PAN / year (Surface Application)
60,473 lbs PAN / year (Subsurface Application)
Most of the land area is pasture and small acreage, so the surface application data will be
utilized for calculations. Utilizing the minimum Nitrogen (PAN) requirements for small
grain crops of 100 lb -PAN / acre / year, the number of acreage required is 580 acres.. The
submitted .application proposes an acreage of 2246 acres. The land area is more than
adequate. The -maximum adjusted PAN would be of concern only if Lumberton had the
minimum required acreage. The SAR is 3.639. The limiting metal is Co er, Based on
nutrient analysis, the calculated site life is 876 years. Due .to the acreage permitted
(proposed and existing), the site life would be far more than the calculated site life.

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PART III - OTHER PERTINENT INFORMATION(continued)
Crop Management Plan:
The Crop Management Plan is the responsibility of Permittee and private farmer. The
sludge is applied at the appropriate agronomic rate for the specific cover crop.'
Records Management:
All records are the responsibility of the City of Lumberton, however, the City has
contracted with S&ME and a sludge contractor to assure Permit compliance.
Accessibility:
All land area is owned by private property owners. Access is controlled by the property
owner. Access onto the property, without permission, would be trespassing.
PART IV - EVALUATION AND RECOMMENDATIONS
The following items need to be addressed in an additional condition:
(1) Some fields that are currently in the City of Lumberton's sludge program, have a
seasonal application rate. This restriction has caused considerable problems due
to seasonal dates that have been phased with the seasonal date restriction. I feel
that the seasonal restriction should be stated as follows:
"Soil borings shall be conducted on the field to verify that , the
apparent water table at the time of application is greater than three
(3) feet below land surface prior to the land application of sludge".
With the restriction written this way, it will allow row crop fields that are- being
utilized for winter small grains to receive residuals during the planting and early
crop establishments months when water table conditions allow. It will also allow
row crop fields that are being utilized for corn production and planted in mid to
late March to receive residuals prior to planting when water table conditions
allow. In no case will residuals be applied when conditions do not allow. With
this restriction, contravention of groundwater standards can be avoided and
monitored more closely than .with the previous restrictions along with allowing
some flexibility in application periods when conditions allow.

PART III - OTHER PERTINENT INFORMATION (continued)
(2) The -:City of Lumberton's sludge program- has many sites in the program which
have confined animal operations on or near the permitted sludge acreage. Due to
uncertainties of how or where the animal waste is disposed, it is recommended
that the following be made a Permit condition in Lumberton's Permit:
"Prior to land application of residuals to any land that has
previously or will receive animal waste, the farmer shall provide
the Permittee with information pertaining to the volume applied
and. a waste analysis. This information shall be submitted so that
verification can be made as to the amount of sludge that is able to
be applied at the appropriate rate. If the maximum agronomic
nutrients amount has been applied. to the field, no additional`sludge "
shall be applied to the field."
Once the above items . are addressed, it is the Fayetteville Regional Office's
recommendation that the subject Permit be 'issued for,an additional five (5) year term. -
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Signature of Report Preparer
Water Quality Regional Supervisor
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Date r I - --