NC0021504_Inspection_20110613

AVA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
June 13, 2011
Brooks Lockhart, Manager
Town of Biscoe
Post Office Box 1228
Biscoe, North Carolina 27209
SUBJECT: Compliance Evaluation Inspection
Town of Biscoe Wastewater Treatment Facility
NPDES Permit No NC0021504
Montgomery County
Dear Mr. Lockhart:
Enclosed please find a copy of the Compliance Evaluation Inspection Report for the inspection conducted May 17,
2011. It was determined.that the Town of Biscoe (Town) was in compliance with NPDES Permit No. NC0021504.
The following observations were made during the inspection. The Town should act on these items as deemed
appropriate.
1. Flow Monitoring. A review of Discharge Monitoring Reports (DMRs) for the period February 2010 to
March 2011 revealed flow values ranging from a low of approximately 0.126 MGD to a high of 0.587 MGD.
Your current flow limit has been set at 0.500 MGD. As discussed with Mr. Stewart flow data can reveal the
presence of Infiltration/Inflow (I/I). Significant I/I can lead to increased operation and maintenance cost,
increased power consumption, sanitary sewer overflows (SSOs) and violation of NPDES permit limits. You
.are urged to begin smoke testing and where possible TV inspections of the municipal sewer system if not
currently ongoing.
2. Influent Splitter Box. As in the past it was noted that the influent structure of the WWTF does not equally split
influent flow to the two aeration basins. The Town is urged to investigate this and act as necessary.
3. Grit Removal. The current WWTF is not equipped with influent grit removal. It is recommended that the Town
evaluate the installation of grit removal equipment. Failure to install or maintain grit removal units can lead to the
aeration basin filling.with sand and other settleable debris that can affect the overall operation of the facility. Further,
large quantities of grit can cause excessive pump wear and maintenance costs.
4. Clarifier. The current WWTF has only one clarifier. With the suspected I/I issue noted above the fact that the WWTF
has only one secondary clarifier is very important. Changes in flow rates to at or beyond the facility. capacity can cause
losses of solids and can potentially lead to noncompliance.
5. Chlorine Contact Chamber. It was noted that the sludge depth in the chlorine contact chamber was approximately
eighteen inches (18") deep. It is recommended that solids be removed whenever solids level has reached in excess on
one foot.
225 Green St., Suite 714, Fayetteville, NC 28301-5043
Phone: [phone] l FAX: [phone] Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity V Affirmative Action Employer
One.
NorthCarolina
Nati/tally

Mr. Lockhart
June 13, 2011
Page 2 of 2
6. Sludge Drying Beds. It was noted that the sludge drying beds were partially covered with vegetation. It is
recommended that the noted vegetation be manually removed as soon as possible.
Please remember that the acceptance of grease onto sand drying beds can lead to clogged drains.
7. Data Validation. A review of selected Discharge Monitoring Reports (DMRs) revealed no issues.
8. Field Analysis. Please continue to perform field analysis for parameters covered under Certificate No. 5204. This
includes proper calibration and record keeping.
9. Influent Sampling. It was noted during the inspection that the Town does not currently take influent samples
utilizing the composite technique. The Town is asked to review the current NPDES pennit with regards to influent
monitoring and provide to this office on or before July 18, 2010 a plan of action to address this matter.
10. Scum/Solids Baffles in Aeration Basins. Scum/Solids Baffles in aeration basins were observed to be corroded to
the point that you can see through them in several locations. The Town should investigate repair or replacement of these
baffles.
I would like to thank Mr. Sam Stewart, ORC for his time taken to assist in the inspection. The Town is commended
for continued efforts in maintaining compliance with your NPDES permit. If you or your staff has questions
pertaining to this report or if I can assist you with other NPDES questions please do not hesitate to contact me
at [phone].
Sincerely,
Paul E. Rawls
Environmental Program Consultant
PER/per
Enclosures: Inspection Report
cc: Sam Stewart ORC Town of Biscoe
[FRO Files._(Mark_Brantley) ___::

1
United States Environmental Protection Agency
EPA Washington, D.C. 20460
/"l 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 15I 3I NC0021504 111 12I 11/05/17 117
Type Inspector Fac Type
18I CI 191gl 201 I
IIII IIIIIIII III6s
Remarks
21IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA Reserved--------- --------
1
671 169 701 31
1 174 751 I I I 1 I I 180
L..1 711 1 721 NI 731
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
POTW name and NPDES permit Number)
Biscoe WWTP
Off NCSR 1556
Biscoe NC 27209
Entry Time/Date
09:30 AM 11/05/17
Permit Effective Date
10/05/01
Exit Time/Date
01:25 PM 11/05/17
Permit Expiration Date
14/05/30
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
///
Sammy Ray Stewart/ORC/910-428-4112/
Other Facility Data
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
James E Blake,PO Box 1228 Biscoe NC 272091228//910-428-4112/ No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit Flow Measurement � Operations & Maintenance • Records/Reports
Self -Monitoring Program � Sludge Handling Disposal • Facility Site Review
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and'Siggnnature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Paul E Raw Division Division of Water Quality//919-733-5083/ • `43"-
Signature of Management Q A R�,eviie�ew/err Agency/Office/Phone and Fax Numbers Date
FRO WQ//910-433-3300 Ext.726/ GD - I4 -1 I
ne}. 1 /
Belinda S Henson i3el`'il � d•
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page # 1

f
31
NPDES
N00021504
111 121
yr/mo/day
11/05/17.
Inspection Type
117 18ICI
(cont.1 1
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
The following observations were made during the inspection. The T own should act on these item s as
deemed appropriate or as indicated.
1. Flow Monitoring. A review of Discharge Monitoring Reports (DM Rs) for the period February 2010 to
March 2011 revealed flow values ranging from a low of approximately 0.126 MGD to a high of 0.587 MGD.
Your current flow limit has been set at 0.500 MGD. As discussed with Mr. Stewart flow data can reveal the
presence of Infiltration/Inflow (1/1). Significant I/1 can lead to increased operation and maintenance cost,
increased power consumption, sanitary sewer overflows (SSOs) and violation of NPDES permit limits. You
are urged to begin smoke testing and where possible TV inspections of the municipal sewer system if not
currently ongoing.
2. Influent Splitter Box. As in the past it was noted that the influent structure of the WWTF does not equally
split influent flow to the two aeration basins. The Town is urged to investigate this and act as necessary.
3. Grit Removal. The current WWTF is not equipped with influent grit removal. It is recommended that the
Town evaluate the installation of grit removal equipment. Failure to install or maintain grit removal units can
lead to the aeration basin filling with sand and other settleable debris that can affect the overall operation of
the facility. Further, large quantities of grit can cause excessive pump wear and maintenance costs.
4. Clarifier. The current WWTF has only one clarifier. With the suspected I/1 issue noted above the fact that
the WWTF has only one secondary clarifier is very important. Changes in flow rates to at or beyond the
facility capacity can cause losses of solids and can potentially lead to noncompliance.
5. Chlorine Contact Cham ber. It was noted that the sludge depth in the chlorine contact chamber was
approximately eighteen inches (1 8") deep. It is recommended that solids be removed whenever solids level
have reached or are found to be in excess of one foot.
6. Sludge Drying Beds. It was noted that the sludge drying beds were partially covered with vegetation. It is
recommended that the noted vegetation be manually removed as soon as possible.
Please remember that the acceptance of grease onto sand drying beds can lead to clogged drains.
7. Data Validation. A review of selected Discharge M onitoring Reports (DMRs) revealed no issues.
8. Field Analysis. Please continue to perform field analysis for parameters covered under Certificate No.
5204. This includes proper calibration and re cord keeping.
9. Influent Sampling. It was noted during the inspection that t he Town does not currently take influent
samples utilizing the composite technique. The Town is asked to review the current NPDES permit with
regards to influent monitoring and provide to this office on or before July 18, 2010 a plan of action to
address this matter.
10. Scum/Solids Baffles in Aeration Basins. Scum/Solids Baffles in aeration basins were observed to be
corroded to the point that you can see through them in several locations. The Town should investigate
repair or replacement of these baffles.
The Town is commended for continued efforts in maintaining compliance with your NPDES permit.
Page* 2

•
Permit: NC0021504 Owner - Facility: Biscoe VVVVTP
Inspection Date: 05/17/2011 Inspection Type: Compliance Evaluation
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? !ninon
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge ■ n n n
Judge, and other that are applicable?
Comment: ORC utilizes settleometer test for process contro.
Permit
(If the present permit expires in 6 months or less). Has the permittee submitted a new application?
Is the facility as described in the permit?
# Are there any special conditions for the permit?
Is access to the plant site restricted to the general public?
Is the inspector granted access to all areas for inspection?
Comment:
Drying Beds
Is there adequate drying bed space?
Is the sludge distribution on drying beds appropriate?
Are the drying beds free of vegetation?
# Is the site free of dry sludge remaining in beds?
Is the site free of stockpiled sludge? ■ , n n n
Is the filtrate from sludge drying beds returned to the front of the plant? ■ ❑ ❑ ❑
# Is the sludge disposed of through county landfill? ■ ❑ ❑ ❑
# Is the sludge land applied? ❑ n ■ ❑
(Vacuum filters) Is polymer mixing adequate? ❑ n ■ n
Comment: See summary section of this report.
Pump Station -.Influent
Is the pump wet well free of bypass lines or structures? ■ ❑ ❑ ❑
Is the wet well free of excessive grease? ■ ❑ n ❑
Are all pumps present? ■ ❑ ❑ ❑
Are all pumps operable? ■ ❑ ❑ ❑
Are float controls operable? ■ ❑ n ❑
Is SCADA telemetry available and operational? ❑ ❑ ■ ❑
Is audible and visual alarm available and operational? ■ fl ❑ ❑
Yes No NA NE
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Yes No NA NE
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Yes No NA NE
Page # 3

Permit: NC0021504 Owner - Facility: Biscoe VVWTP
Inspection Date: 05/17/2011 Inspection Type: Compliance Evaluation
Pump Station - Influent
Comment:
Bar Screens
Type of bar screen
a.Manual
b.Mechanical
Are the bars adequately screening debris?
Is the screen free of excessive debris?
Is disposal of screening in compliance?
Is the unit in good condition?
Comment: Screening container should drain into wastewater treatment facility.
Secondary Clarifier
Is the clarifier free of black and odorous wastewater?
Is the site free of excessive buildup of solids in center well of circular clarifier?
Are weirs level?
Is the site free of weir blockage?
Is the site free of evidence of short-circuiting?
Is scum removal adequate?
Is the site free of excessive floating sludge?
Is the drive unit operational?
Is the return rate acceptable (low turbulence)?
Is the overflow clear of excessive solids/pin floc?
Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth)
Comment:
Aeration Basins
Mode of operation
Type of aeration system
Is the basin free of dead spots?
Are surface aerators and mixers operational?
Are the diffusers operational?
Is the foam the proper color for the treatment process?
Yes No NA NE
Yes No NA NE
■
n
■ ❑❑❑
■ ❑❑❑
■ ❑❑❑
■ ❑❑❑
Yes No NA NE
■ ❑❑❑
■ 000
■ ❑❑❑
■ ❑❑.❑
■ ❑❑❑
■ ❑❑❑
■ ❑❑❑
■ ❑❑❑
■ ❑❑❑
■ ❑❑❑
■ ❑❑❑
Yes No NA NE
Ext. Air
Surface
■ ❑❑❑
■ ❑❑❑
■ ❑❑❑
■ ❑❑❑
Page # 4

Fr
Permit: NC0021504 Owner -Facility: BiscoeWWTP
Inspection Date: 05/17/2011
Inspection Type: Compliance Evaluation
Aeration Basins
Does the foam cover less than 25% of the basin's surface?
Is the DO level acceptable?
Is the DO level acceptable?(1.0 to 3.0 mg/I)
Comment:
Disinfection -Gas
Are cylinders secured adequately?
Are cylinders protected from direct sunlight?
Is there adequate reserve supply of disinfectant?
Is the level of chlorine residual acceptable?
Is the contact chamber free of growth, or sludge buildup?
Is there chlorine residual prior to de -chlorination?
Does the Stationary Source have more than 2500 Ibs of Chlorine (CAS No. 7782-50-5)?
If yes, then is there a Risk Management Plan on site?
If yes, then what is the EPA twelve digit ID Number? (1000- - )
If yes, then when was the RMP last updated?
Comment: See Summary Section
De -chlorination
Type of system ?
Is the feed ratio proportional to chlorine amount (1 to 1)?
Is storage appropriate for cylinders?
# Is de -chlorination substance stored away from chlorine containers?
Comment:
Are the tablets the proper size and type?
Are tablet de -chlorinators operational?
Number of tubes in use?
Comment:
Pumps-RAS-WAS
Are pumps in place?
Are pumps operational?
Are there adequate spare parts and supplies on site?
Yes No NA NE
Innn
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Yes No NA NE
■ nnn
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n ■nn
n nn■_
n n■n
n n■n
Yes No NA NE
Gas
■ nnn
■ nnn
■ nnn
nn■n
n n■n
Yes No NA NE
■nnn
■ nnn
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Page # 5

Permit: NC0021504 Owner - Facility: Biscoe WWTP
Inspection Date: 05/17/2011 Inspection Type: Compliance Evaluation
Pumps-RAS-WAS
Comment:
Effluent Sampling
Is composite sampling flow proportional?
Is sample collected below all treatment units?
Is proper volume collected?
Is the tubing clean?
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type representative)?
Comment: Effluent sampling is performed via portable sampler.
Yes No NA NE
Yes No NA NE
■ nnn
■ nnn
■ nnn
■ nnn
■ nnn
■ nnn
Page # 6