NC0024201_Historical information_20081231

October 23, 2008
Subject:
Dear Mr. Brown:
On September 12, 2008, Dana Folley of the Pretreatment, Emergency Response, and Collection Systems
(PERCS) Unit and Cheng Zhang of the Raleigh Regional Office (RRO) conducted a Pretreatment Compliance
Audit of Roanoke Rapids Sanitary District’s pretreatment program. The assistance given by Ms. Greta Glover,
pretreatment coordinator, was greatly appreciated. The audit report is attached. Findings during the inspection
were as follows:
Mr. Daniel Brown, CEO
Roanoke Rapids Sanitary District
P.O. Box 308
Roanoke Rapids, NC 27870
4. During the audit, Ms. Glover inspected one of the two SIUs, Rosemary Power Station. The inspection
was very thorough. It was evident that Ms. Glover has excellent relationship with the industry
representative, broad knowledge of pretreatment, great attention to details, and proactive attitude to
solve potential problems together with industrial users.
2. The pretreatment audit file review included Kennametal (Permit No. 002) and Rosemary Power (Permit
No. 007). The files needed for review were available for inspection, contained all the required elements
and were in excellent condition.
5. A review of the files containing the pretreatment program elements was conducted. These files were
very well organized.
1. There are two Significant Industrial Users (SIUs), one of which is also Categorical Industrial Users
(CIUs). It was noted that no SIUs were in Significant Non-Compliance (SNC) for the most recent semi­
annual period.
Raleigh Regional Office
1628 Mail Service Center
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Phone [phone]
FAX [phone]
Coleen H. Sullins, Director
Division of Water Quality
North Carolina Division of Water Quality
Internet: h2o.enr.state.nc.us
3. POTW and SIUs completed monitoring as required by the Industrial User Pretreatment Permits (lUPs)
during the most recent semi-annual period. Rosemary Power was in compliance. Kennametal had one
flow violation in May 2008. The SIU informed the POTW of the violation within 24 hours. A Notice of
Violation (NOV) was issued by the POTW on June 18, 2008, as required by the Enforcement Response
Plan (ERP). It was noted that the POTW has an excellent SIU monitoring data management system that
automatically identifies permit limit violations and SNC.
Surface Water Protection
Raleigh, NC 27699-1628
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Pretreatment Compliance Audit
Roanoke Rapids Sanitary District
NPDES Permit No. NC0024201
Halifax County
One
NorthCarolina
_____ Naturally
Customer Service
1-877-623-6748
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Sincerely,
Enclosure Roanoke Rapids Sanitary District Audit Report
CO: Dana Folley, DWQ - FPERCS Unit
Cheng Zhang - RRO
Central Files
Greta Glover, Roanoke Rapids Sanitary District
7. The most recent Headworks Analysis (HWA) was approved by PERCS on January 11, 2008. It was
noted that the due date for next HWA specified in PERCS’ approval letter (June 1, 2012) was incorrect;
the correct one should be June 1, 2010.
8. The ERP needs to be revised to meet the requirements of PERCS 2008 Model ERP. Please submit
revised ERP to PERCS Unit for review and approval.
Cheng Zhang
Environmental Specialist
Roanoke Rapids Sanitary District
NPDES Permit No. NC0024201
Pretreatment Compliance Audit
6. The review of Long Term Monitoring Plan (LTMP) data indicated that all locations were sampled with
required frequencies, and all samples were analyzed using correct detection limits specified in the
LTMP since last inspection.
Roanoke Rapids Sanitary District’s pretreatment program is well managed. Thank you for your continued
support of the Pretreatment Program. If you have any questions or comments, please call Cheng Zhang at (919)
791-4200 (or email: [e-mail]).
Background Information [Complete prior to audit; review Program Info Database Sheet(s)|
1.Roanoke Rapids Sanitary District WWTP
2.
3.
4.
Audit Date 9 /12 /20085.
6.
7.
N No8.
9.
PCS (WENDB)Coding
Inspector
(INSP)
SIUS2
CIUS1
0
0
NOIN0
0 NOCM
PSNC0
MSNC0
SNPS0
0
Not Inspected or Sampled SNIN0
NC DWO Pretreatment Audit Form Revised: Julv 25. 2007 ■Page 1
19. Number of SIUs in SNC for Both Reporting and Limits Violations During Either of Last 2
Semi-Annual Periods
10. Current Number of Significant Industrial Users (SIUS)?
11. Current Number of Categorical Industrial Users (CIUS)?
12. Number of SIUs Not Inspected by POTW in Last Calendar Year?
13. Number of SIUs Not Sampled by POTW in Last Calendar Year?
Zip Code 27890
E-Mail ggloverfa rrsd.org
MM/DD/YY
I 09 I 12 I 08 I
(DTIA)
NCDENR
Main Program Permit Number
|N|c|0|0|2l4|2l0ll|
Trans.Code
I N I
In spec. Type
LgJ
(TYPI)
Fac. Type
uu
(FACC)
In the last year has the POTW experienced any NPDES or Sludge Permit compliance problems? Yes
If Yes, Explain.
14. Enter Higher Number of 12 or 13
15. Number of SIUs with No IUP, or with an Expired IUP
20. Number of SIUs in SNC for Self-Monitoring Requirements that were
16. Number of SIUs in SNC for Either Reporting or Limits Violations During Either of Last 2
Semi-Annual Periods (Total Number of SIUs in SNC)
17. Number of SIUs in SNC for Reporting During Either of Last 2 Semi-Annual Periods
18. Number of SIUs in SNC for Limits Violations During Either of Last 2 Semi-Annual Periods
Control Authority (POTW) Name:
Control Authority Representative(s): Greta Glover
Title(s): Laboratory Supervisor/Pretreatment Coordinator
Address of POTW:
Mailing 135 Aqueduct Road
City Weldon
Phone Number 252-536-4884 Fax Number 252-536-4885
Is POTW under an Order That Includes Pretreatment Conditions? Yes IXI No
Order Type and Number:Are Milestone Dates Being Met? Yes O No O NA
Parameters Covered Under Order
N^mi CAROLINA DIVISION OF WQUALITY
PRETREATMENT AUDIT REPORT
4 /Last Inspection Date: 4 / 26 / 2007 Inspection Type: PCI O Audit
Has Program Completed All Requirements from the Previous Inspection and Program Info Sheet(s) ? [x] Yes No
If No, Explain.
OTW has copy of each Program
Headworks Analysis (HWA)13 Yes No 3 Yes No
2/1/13
3/14/07 5/23/01
2/7/02 4/11/02
Legal Authority (Sewer Use Ordinance-SUO)
from which you receive wastewater which are not in your annexed jurisdiction?
23.
24.
25. Date of Last SUO Adoption by Local Council 7/12/2007
26.
Enforcement (Enforcement Response Plan-ERP)
27. Did you send a copy of the ERP to your industries? 3 Yes No
If no, POTW must send copy within 30 days.
28.
29.
Resources
13s 3m 3u
3s 3m 3u
3s 3m 3u
3s 3m 3u
3s 3m 3u
3s 3m 3u
3s 3m 3u
NC DWQ Pretreatment Audit Form Revised: July 25. 2007
Personnel Available for Maintaining
POTW’s Pretreatment Program
Have you had any problems interpreting
If yes, Explain.
3/31/08,
6/5/08
1/7/94, 08
still (a, DWQ
New computer every several years, with good software;
internet and email.
List Industries under a Schedule or Order and Type of Schedule or Order
3 Yes 3 No
3 Yes 3 No
3 Yes 3 No
3 Yes 3 No
Industrial Waste Survey (IWS)
Sewer Use Ordinance (SUO)
Enforcement Response Plan (ERP)
Long Term Monitoring Plan (LTMP)
Staff Training (i.e. Annual and
Regional Workshops, Etc.)________
Computer Equipment (Hardware and
| Software)
Availability of Funds if Needed for
Additional Sampling and/or Analysis
Reference Materials
Access to POTW Vehicles for
Sampling, Inspections, and
Emergencies______________
Access to Operable Sampling
Equipment
3 Yes 3 No
3 Yes 3 No
3 Yes 3 No
3 Yes 3 No
jNTS REVIEW- Review POTW files, v
documents and PERCS Approval Letter, and dates consistent with Program Info:
Last Submittal
Date In file?
5/31/05,
10/1/07
1/29/08
Last Approval
Date In file
7/21/05,
1/11/08
4/30/08
Date Next Due,
If Applicable
6/1/10
or enforcing any pan of the SUO? 3 Yes 3 No
22. Do you have any towns and/or areas f ‘ '
•* J ~ — — xz v *4* j x_» U1H1VZXVC1 I MX 1OIHV iivu ;
3 Yes No If yes, Please list these towns and/or areas. Northhampton Co.. Town of Gaston, Halifax County
21. PRETREATMENT PROGRAM ElA|]
Element in their File, complete with all supportive
Program Element
Each SIU has own sampler, which POTW uses, too. Also one
portable just for pret. WWTP has fixed samplers for I, E, PCE,
TEE, plus spare portable, budget one new per year, rotate in.
Lab budget has extra S. know can charge SIUs, and do in
special circumstances.______________________
Notebook for fed + state regs. Recommend download, review,
or bookmark 2 EPA guidance manuals - see Recommendations
Section for details and web-site.___________________
Are able to attend all training as needed.
30. Please Rate the Following: S=Satisfactory M=Marginal
Rating
Ifyesto#22, Do you have current Interjurisdictional Agreements (IJAs) or other Contracts? 3 Yes 3 No 3 NA
A copy, if not already submitted, should be sent to Division.
U=Unsatisfactory___________________________
Explanation, if Unsatisfactory____________________
Steven - 10-20% - sampling, plus general pretreatment
learning; rest of his time on FOG program + plant operations.
Greta - 50 % FTE - does rest of pretreatment tasks; rest of her
time on lab. Greg + Dan - each 1-5% as needed.____________
Dedicated FOG truck, operations has car and trucks. Ail
work.
any problems interpreting or enforcing any part of the ERP (i.e. any adjudication, improper enforcement, etc?
If yes to #22, Have you had any trouble working with these towns or districts? 3 Yes 3 No 3 NA
If yes, Explain. Yes is for Halifax County - this agreement is new and various issues are still being worked out.
Public Perception/ Participation
33.
34.
35.
36.
37.Is the public notified about changes in the SUO or Local Limits? [x] Yes No
Were all industries in SNC published in the last notice? KI Yes No38.
41. Does the POTW accept waste by (mark if applicable) K Truck nDedicated Pipe [~~l NA Porta John and Septage
45. If yes to #43, W’hat is being done to address the over allocations? (short-term lUPs, HWA to be revised, pollutant study, etc.)
NC DWO Pretreatment Audit Form Revised: Inlv 9007
44. Review POTW's copies of current allocation tables for each WWTP. Are there any over allocations? Yes K No
If yes, What parameters are over allocated?
•program? K Yes No
apabilities.
In addition to annual inspection, does the POTW periodically meet with industries to discuss pretreatment? K Yes No
Have had industry days in past. Generally meet as needed, and during sampling.
43. How does the POTW allocate its loading to industries? Mark all that apply
Uniform Limits K Historical Industry Need By Surcharge K Categorical Limits Other
Explain Other:
P data management system to run the pretreat^^Bj
excel spreadsheet with compliance judgeml^ca
31. Does the POTW have an addM|
Explain Yes or No. Made own
Dnrra 7
Has any one from the public ever requested to review pretreatment program files? K Yes No
If yes, Explain procedure. If no, How would the request be addressed? One POTW individual stays with the person doing the
review. If the person requests a copy of a paper, another POTW individual makes the copy. The files are not left alone
with the reviewer.
Has any industry ever requested that certain information remain confidential from the public? Yes K No If yes, Explain
procedure for determining whether information qualified for confidential status, as well as procedure for keeping files confidential
from public. If no, how would the request be addressed? Haven’t had need so far, but would consult with DWQ.
Confidential info would be kept from public, in separate vault.
Permitting (Industrial Waste Survey-IWS)
39a. How does the POTW become aware of new or changed Users? Application for wastewater services - all Users are
customers of RRSD, regardless of citv, county location. RRSD office has company complete short form. Do also
communicate with Roanoke Rapids City business license office, construction review of plans before town approval.
Industrial Waste Surveys.
39b. Once the POTW becomes aware of new or changed Users, how does the POTW determine which industries have the
reasonable potential to adversely impact the WWTP and therefore require a new permit or a permit revision? (Who is an
SIU?) Send a short form, respond according to the information received, a site inspection if determined necessary.
Are there any local issues affecting the pretreatment program (e.g.. odor, plant closing, new or proposed plants)?
Yes K No If yes, Explain.
42. If the POTW accepts trucked waste, what controls are placed on this waste? (example, designated point, samples drawn,
manifests required) Haulers are registered with POTW, Waste is added to the incoming plant waste at the point
where the two main trunk lines converge at the plant. This is located on the plant site. If PortaJohn waste, then
the hauler dumps the load and leaves a receipt in a box located at the main front entrance of the operations
building. If septage, the truck driver must bring in a sample to the laboratory for pH analysis before being
allowed to dump. If the pH is outside the permitted range, then the load has to be pH adjusted before it can be
dumped. PortaJohn waste taken all year round. Septage only taken in winter when haulers’ fields are too wet.
Had one special request from nursing home whose hauler had wet fields.
32. How does the POTW recover the cost of the Pretreatment Program from their industries? Explain.
Fees and surcharges
40. Does the POTW receive waste from any groundwater remediation projects (petroleum, CERCLA) or landfill leachate?
K Yes DNo If Yes, How many are there? 1
Please list each site and how it is permitted, if applicable. Bottom’s Shell located on Interstate 95. Is not in operation
at this time. Future operation is dependent upon funding.
Permit Compliance
50.
51.
52.
53.
54.
55.
56.
57.
Who performs sample analysis for the POTW for58.
59.
NC DWQ Pretreatment Audit Form Revised: July 25, 2007 Page 4
47. Has the POTW experienced any difficulty in allocation? (for example: adjudication by an industry) Yes No
If yes, Explain.
48. How does the POTW decide on which pollutants to limit in the permits? Monitor for? (for example: were only those pollutants
listed on the application limited; categorical parameters; NPDES Pollutants of Concern)
Permit according to local limits, NPDES permit. Categorical status, past discharge from industry, including PPA required
as part of application.
49. How does the POTW decide what the monitoring frequency should be for the various pollutants in industry permits? Explain.
Minimum requirements and past performance of SIU.
Does the POTW use the Division’s model inspection form or equivalent? Yes No
If no, does the POTW form include all DWQ data? O Yes O No
Does the POTW currently have or during the past year had any permits under adjudication? O Yes [x] No
If yes, which industries? What was (will be) the outcome of the adjudication?
What criteria does the POTW use to determine if a submitted slug/spill control plan is adequate?
The requirements of the Sewer Use Ordinance and permit.
Were all SIUs evaluated for the need of a slug/spill control plan during their most recent inspections? Yes No
If no, Explain.
Metals
Conventional Parameters
Organics
46. Does the POTW keep pollutant loading in^^Lrvt
If yes, what percentage of each parameter
have lots of reserve - nickel has smallest at 80 %.
Explain the Chain of Custody Procedure used for both in house and commercial lab samples.
A chain of custody was developed using the PERCS model as a guide. This is used for collecting the sample at the industry
site and conveying the sample back to the POTW laboratory. The contract lab chain of custody is used for conveying the
sample to the contract lab for analysis that can not be performed by the POTW lab.
Demonstrate how the POTW judges compliance. This should include compliance judgment on all violations of limits, reporting
requirements, and permit conditions, as well as for SNC. All data is entered into the spreadsheet which automatically
highlights violations whether regular or whether exceeding TRC limits. If violation of reporting or permit condition, it is
noted on the spreadsheet. The spreadsheet automatically notifies of SNC status.
Has the POTW established a procedure to ensure that representative samples will be taken by the POTW or SIU each time?
(example: correct location; proper programming of sampler; clean equipment; swirling the sample bucket uniformly)
POTW: Yes O No SIU: [X] Yes No If yes. Explain. These have been addressed to each industry by the
pretreatment coordinator at the industry sampling site. Also the pretreatment coordinator does about 95% of the POTW
sampling. The other 5% is done bv plant personnel that has been trained by the coordinator, [[Note; Pretreatment
Coordinator is main trainer for wastewater clases in the area, and all SIU reps have attended.||
What criteria are used to determine if a slug/spill control plan is needed?
The requirements of the Sewer Use Ordinance and permit. All SIUs required to have at least have enough of a Plan to have
listing POTW emergency contact numbers.
Microbac
RRSD
Microbac
How does the POTW decide where the sample point for an SIU should be located?
Factors include safety, power supply availability, location of discharge, and whether or not discharge is mixed with non­
process wastewaters.
e for future growth / safety? [J Yes O
% Don’t have a set percentage. Generali^eep as much as can. Currently
Pass Through Sludge Quality
64. Do you see any way to increase your loading in the future (Example: obtaining more land for sludge disposal)? Y<
Explain.
Summary
NC DWQ Pretreatment Audit Form Revised: Julv25. 2007 Pnrtf» S
65. Do you plan any significant changes to the pretreatment program or changes to the WWTP that may affect pretreatment?
Anticipated partnership with Reser's.
increased average flow
I |5 year expiration
□NPDES limits change
I [Other
60a.
60b.
60c.
60d.
60e.
60f.
62. Do you have plans to revise your HWA in the near future? Yes No
If yes, What is the reason for the revision? (mark all that apply)
□More LTMP data available □Resolve over allocation
Explain.
es No
63. In general, what is the most limiting criteria of your HWA? □inhibition
Long/Short Term Monitoring dUk/STMP) and Headworks Analysis (HW^^
Is LTMP/STMP Monitoring Being Conducted at Appropriate Locations and Frequencies? YES NO
Are Correct Detection Levels being used for all LTMP/STMP Monitoring? YES NO
Is LTMP/STMP Data Maintained in Table or Equivalent? YES NO Is Table Adequate? YES NO
All LTMP/STMP effluent data on Discharge Monitoring Report (DMR)? YES NO DWQ Inspector, verify yourselfl
If NO to any above, list violations
Should any Pollutants of Concern be Eliminated from or Added to LTMP/STMP? YES NO
If yes, which ones? Eliminated:Added:
61. Do you complete your own headworks analysis (HWA) ? Yes No
If no, Who completes your HWA? Phone ()-
2. Rosemary Power
Yes No
Yes No
SYesaNoDN/A □YesQNoaN/A YesDNoON/A
YesE]Nol3N/A □YesONoON/A
□YesdNolWA □YesONoDN/A
Yes No Yes No Yes No
□YesONoSN/A YesQNol3N/A □YesnNoQN/A
a.nYesDNoSN/A a.QYesnNoBN/A a.nYesDNonN/A
b.nYesDNoEJN/A b.O YesDNoON/A b.aYesQNoElN/A
c.D YesDNoSN/A
FILE REVIEW COMMENTS;
Generally, files are excellent!
Question 79; Greta keeps envelopes with postmarks.
NC DWQ Pretreatment Audit Form Revised: July 25, 2007 Page 6
a. SYes UNo
b. aYesDNoSN/A
Yes No
a. nYesQNoElN/A
b. qYesDNoBN/A
Yes No
YesDNoIZlN/A
□YesEJNoEIN/A
Yes No
a. SYes DNo
b. pYesPNoBN/A
□YesONo^N/A
Yes No
a. DYes DNo
b-PYesPNopN/A
□YesDNoDN/A
a. DYes DNo
b-PYesPNoPN/A
Yes No
c.P YesPNoSN/A
Yes No
□YesDNoElN/A
c.P YesPNopN/A
Yes No
□YesnNoQN/A
Yes No
YesQNonN/A
Yes No
□YesDNoON/A
007
Yes No
5/31/12 ~
N/A ~
Yes No
| □YesDNoElN/A
] □YesDNoElN/A
a.SYesPNoPN/A
| b.BYesPNopN/A
I Yes No
y/TION)
3.
Yes Noy
EYesCJNoClN/A ||
I] □YesDNoElN/A
J| □YesDNoElN/A
a.pYesPNoPN/A
| b.pYesPNoPN/A
I Yes No
j Yes No
11 a. ^Yes DNo
|| b.PYesPNoBN/A
| □YesONoEN/A
I] a. SYes DNo
II b.pYesPNoBN/A
H Yes No
Yes No||
EYesCJNoDN/A |f
002 ||
Yes No~~||'
5/31/12 |[
471 ~[[
Yes No ||
67. IUP Number_____________________________________________________
68. Does File Contain Current Permit?__________________________________
69. Permit Expiration Date____________________________________________
70. Categorical Standard Applied (I.E. 40 CFR, Etc.) Or N/A______________
71. Does File Contain Permit Application Completed Within One Year Prior
to Permit Issue Date?______________________________________________
72. Does File Contain Inspection Completed Within Last Calendar Year?
73. a. Does File Contain Slug/Spill Control Plan?
b. If No, is One Needed? (See Inspection Form from POTW)__________
74. For 40 CFR 413 and 433 TTO Certification, Does File Contain a Toxic
Organic Management Plan (TOMP)?________________________________
75. a. Does File Contain Original Permit Review Letter from Division?
b. All Issues Resolved?____________________________________________
76. During Most Recent Semi-Annual Period, Did POTW Complete its
Sampling as Required by IUP, including Flow?_______________________
77. Does File Contain POTW Sampling Chain-Of-Custody Forms?_________
78. During Most Recent Semi-Annual Period, Did SIU Complete its
Sampling as Required by IUP, including Flow?_______________________
79. During Most Recent Semi-Annual Period, Did SIU submit all reports on
time?____________________________________________________________
80a. For categorical IUs with Combined Wastestream Formula (CWF), does
file include process/dilution flows as Required by IUP?___________
80b. For categorical IUs with Production based limits, does file include
production rates and/or flows as Required by IUP?________________
81. During Most Recent Semi-Annual Period, Did POTW Identify All
Limits Non-Compliance from Both POTW and SIU Sampling?_________
82. During Most Recent Semi-Annual Period, Did POTW Identify All
ReportingJNon-Compliance from SIU Sampling?_____________________
83. a. Was POTW Notified by SIU (Within 24 Hours) of All Self­
Monitoring Limit Violations?
b. Did Industry Resample and submit results to POTW within 30 Days?
c. If applicable, did POTW resample and obtain results within 30 days of
becoming aware of SIU limit violations in the POTW’s sampling of SIU?
84. During Most Recent Semi-Annual Period, Was SIU in SNC?__________
85. During Most Recent Semi-Annual Period, Was Enforcement Taken as
Specified in POTW's ERP (NOVs, Penalties, timing, etc.)?_____________
86. Does File Contain Penalty Assessment Notices?______________________
87. Does File Contain Proof Of Penalty Collection?______________________
88. a. Does File Contain Any Current Enforcement Orders?
b. Is SIU in Compliance with Order?________________________________
89. Did POTW Representative Have Difficulty in Obtaining Any Requested
Information For You?
INDUSTRIAL USER PERMIT (IUP) FILE^LIEW (3 IUP FILE REVIEWS AND 1 IU El
66. User Name | 1. Kennameta^^F
□YesDNoEN/A I
□YesEJNo^N/A |[

INDUSTRY INSPECTION PCS CODING:
Fac. Type
(FACC)
Electricity
Title:Phone:[phone], ext. 223 Fax:[phone]
Industrial Inspection Comments:
Very thorough inspection, especially File review which extended to detailed review of SIU's continuous pH readings, flow meter
POTW and SIU relationship very respectful andcalibration, slug/spill plan status, and various operational records.
communicative.
Audit SUMMARY AND COMMENTS:
Audit Comments:
instances where both SIU were making plans for maintenance or other special activities and their evaluation indicated these
procedures might put them in violation of their IUP. Files show SIU comes to POTW to discuss this and obtain permission,
including a Consent Agreement to specify how activity will proceed, with such temporary relief for IUP limits as needed bv the
SIU but that will not jeopardize the WWTP or collection system.
Question 30: To review EPA's "Industrial User Inspection and Sampling Guidance for POTWs" + "Control of Slug Loadings
to POTWs: Guidance Manual." Visit "http://cfpubl.epa.gov/npdes/docs.cfm7program id=3&view=allprog&sort=name
Recommend make contact with other municipalities and county offices to see if they have business licenseQuestion 39a:
process.
NOD:
NOV:
POTW Rating:
Unsatisfactory
DATE: September 12, 2008
Page 7Revised: July 25, 2007NC DWQ Pretreatment Audit Form
Excellent Pretreatment Program: Great filing. Broad knowledge. Excellent relationship with industry
rep, who himself is very knowledgeable about his potential to impact the POTW and his responsibility to prevent this. Several
Requirements:
Recommendations:
Satisfactory Marginal
Audit COMPLETED BY: Dana Rees Follev, PERCS, and Cheng Zhang, Raleigh Regional Office
KI No
N No
KI No
K Yes
K Yes
K Yes
K Yes
K Yes
No
No
No
No
No
Yes
Yes
QNCR: Yes
Main Program Permit Number
lNlcl0l0l2l4l2l0ll I
Inspec.Type
I u_I
(TYPI)
Inspector
LsJ
(INSP)
Trans.Code MM/DD/YY
I 09 I 12 I 08 I
(DTIA)
Rosemary Power Station
120 West 12lh Street
1. Industry Inspected:
2. Industry Address:
3. Type of Industry/Product:
4. Industry Contact: Ron Eldred Title: Plant Manager
5. Does the POTW Use the Division Model Inspection Form or Equivalent? KI Yes O No
6. Did the POTW Contact Conduct the Following Parts of the Industrial Inspection Thoroughly?
Comments:
A. Initial Interview
B. Plant Tour
C. Pretreatment Tour
D. Sampling Review
E. Exit Interview
Michael F. Easley. Governor
September 10. 2008 Uf ^CoO^O\
MEMORANDUM
From: Myrl Nisely, RRO WWTP Inspector
Section
Subject: Roanoke Rapids Sanitary District Sodium Hypochlorite Disinfection System
Recommendations:
1.
2.
3.
4.
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Experience at other WWTPs shows that the hypochlorite will lose as much as 50 to 60% of its
strength when held for long time periods (a month or two). This loss is related to temperature
and exposure to sunlight. Therefore, frequent measuring of strength by lab personnel may be
required, and the respective dosages adjusted, to provide for disinfection needs.
The plan to provide two (2) 13,680 gallon storage tanks may present some challenges because
of the long holding periods during which the liquid is consumed. Strength die-off and the need
for adjusting dosages accordingly may be problematic. It may be better to have much smaller
storage and refill the storage tanks more often. No details on how often the tanks will be filled
or how they may be sequenced is provided in the engineering report.
To: William H. Bland, Jr.
Construction Grants and Loans Section
If dilution strength variations are problematic, consider smaller storage volumes that are
refilled at a greater frequency.
Sodium hydroxide is proposed for final effluent pH adjustment. Hypochlorite is
strongly alkaline. Is alkaline adjustment in use at the present time while using gaseous
chlorine? If needed, caution should be used with hypochlorite additions.
Remember to update the stormwater SP3 plan to include secondary containment for any
new tanks not located in the existing chlorine building.
■p r
x-Coleen H. Sullins, Director
Division of Water Quality
Phone [phone] Customer Service
FAX [phone]
North Carol ii
Naturalli
William G. Ross, Jr.. Secretary
North Caronna Department of Environment and Natural Resources
Through: Danny Smith, Supervisor . J
RRO Surface Water Protiqtio:
Disinfection by hypochlorite may be more of “moving target" due to variability in
dilution strength that has been the experience with chlorine. Consider prescriptive
monitoring to insure appropriate disinfection as a part of startup O & M. This protocol
should extend for a period of at least 180 days.
^LBII jl 0? J 111 I If ,
> UUA-
North Carolina Division of Water Quality Raleigh Regional Office Surface Water Protection
Internet: www.ncwaterqiiality.org 1628 Mail Service Center Raleigh. NC 27699-1628
Michael F. Easley, Governor
August 8, 2008
MEMORANDUM
TO:
FROM:
SUBJECT:
WHB/dr
Attachment
cc:
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Thank you for your continued cooperation and responsiveness. If you have any questions, please
contact me at [phone] at your earliest convenience.
One copy of the subject Engineering Report is attached for the Raleigh Regional Office’s
technical review and comment. The Regional Office’s technical input concerning this project,
based on the Region’s knowledge of the Roanoke Rapids Sanitary District and the surrounding
area, will be greatly appreciated. Please keep this copy of the report for your files and return
your comments to this office by September 8, 2008, if possible.
Construction Grants and Loans Section
1633 Mail Service Center Raleigh NC 27699-1633
Phone: [phone] / FAX: [phone] / Internet: www.nccgl.net
William H. (Bill) Bland, Jr.
Facilities Evaluation Unit
Construction Grants and Loans Section
Roanoke Rapids Sanitary District
Engineering Report & Environmental Assessment
Roanoke Rapids Waste water Treatment Plant
Sodium Hypochlorite System
Project No. CS 370449-04
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
Chuck Wakild, Surface Water Protection Supervisor
Jay Zimmerman, Aquifer Protection Supervisor
DWQ Raleigh Regional Office
Daniel Blaisdell, P.E.
Seth Robertson, P.E.
FEU/SRF
> |Lire
NorthCarolinaNaturally
Michael F. Easley. Governor
August 8, 2008
SUBJECT:
Dear Mr. Brown:
I
WHB/dr
cc:
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Construction Grants and Loans Section
1633 Mail Service Center Raleigh NC 27699-1633
Phone: [phone] / FAX: [phone] / Internet: www.nccgl.net
Engineering Report & Environmental Assessment for
Roanoke Rapids Sanitary District
Roanoke Rapids Waste water Treatment Plant
Sodium Hypochlorite System
Project No. CS 370449-04
Coleen H. Sullins. Director
Division of Water Quality
I am writing to acknowledge receipt of the subject on August 1, 2008. The Facilities
Evaluation Unit has initiated the project review, and we will notify you and your engineer upon
completion of our review.
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coulter Jewell Thames, P.A. - Thomas W. Glenn, P.E.
DWQ Raleigh Regional Office
Daniel Blaisdell, P.E.
Seth Robertson, P.E.
William H. Bland, Jr., P.E.
PMB/DMU/FEU/SRF
If you have any questions concerning this matter, please contact William H. (Bill) Bland, Jr. at
[phone] or me at [phone].
Sincerely,
74^0^ y/-
Seth Robertson, P.E., Supervisor
Facilities Evaluation Unit
Mr. R. Danieley Brown, P.E. - Chief Executive Officer
Roanoke Rapids Sanitary District
Post Office Box 27870
Roanoke Rapids, North Carolina 27870
OneNorthCarolina
Naturally
0^^
\QC.
iDUHl
Michael F. Easley, Governor
August 8, 2008
MEMORANDUM
nr. l '
TO:
FROM:
SUBJECT:
WHB/dr
Attachment
cc:
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
One copy of the subject Engineering Report is attached for the Raleigh Regional Office’s
technical review and comment. The Regional Office’s technical input concerning this project,
based on the Region’s knowledge of the Roanoke Rapids Sanitary District and the surrounding
area, will be greatly appreciated. Please keep this copy of the report for your files and return
your comments to this office by September 8, 2008, if possible.
Thank you for your continued cooperation and responsiveness. If you have any questions, please
contact me at [phone] at your earliest convenience.
Construction Grants and Loans Section
1633 Mail Service Center Raleigh NC 27699-1633
Phone: [phone] / FAX: [phone] / Internet: www.nccgl.net
Chuck Wakild, Surface Water Protection Supervisor
Jay Zimmerman, Aquifer Protection Supervisor
DWQ Raleigh Regional Office
William H. (Bill) Bland, Jr.
Facilities Evaluation Unit
Construction Grants and Loans Section
Roanoke Rapids Sanitary District
Engineering Report & Environmental Assessment
Roanoke Rapids Wastewater Treatment Plant
Sodium Hypochlorite System
Project No. CS 370449-04
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
Daniel Blaisdell, P.E.
Seth Robertson, P.E.
FEU/SRF
52/T > [|_
NorthCarolinaNaturally
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Roanoke Rapids Sanitary District
I Engineering Report
July 2008
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Roanoke Rapids Wastewater Treatment Plant
Sodium Hypochlorite System
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Infrastructure, environment, facilities
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Roanoke Rapids Sanitary District
I Engineering Report
July 2008
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Roanoke Rapids Wastewater Treatment Plant
Sodium Hypochlorite System
(P ARCADIS
Infrastructure, environment, facilities
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Engineering Report
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Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
This document is intended only for the use
of the individual or entity for which it was
prepared and may contain information that
is privileged, confidential and exempt from
disclosure under applicable law. Any
dissemination, distribution or copying of
this document is strictly prohibited.
Prepared for
Roanoke Rapids Sanitary District
Prepared by
ARCADIS
801 Corporate Center Drive
Suite 300
Raleigh
North Carolina 27607
Tel [phone]
Fax [phone]
Our Ref:
NCRRSD01.0002
Date
July 2008
W. Whit Wheeler, PE
Project Manager
Miranda Spencer,~PE I
I
I ARCADIS Table of Contents
I
1
A. Summary, Conclusion, Recommendation 1
I B. Current Situation 1
1.System Description 1
2.Population and Demographics 2
3.Infiltration/lnflow 2
I 4.Wastewater Flows 3
C. Future SituationI 3
D. Alternatives Analysis 6
1.Disinfection Alternatives 6
1.1.No-Action 6
I 1.2.Replace Chlorine Gas Disinfection System with Ultraviolet Disinfection System 6
1.3.
7
2.Biosolids Disposal Alternatives 7
3.Design Criteria for Selected Alternative 7
4.Open Space and Recreational Opportunities 9
Collection Systems5.9I6.Interceptors 10
I E. Present Worth Analysis 10
F. User Charges and Financial Capability 10IG. Public Participation 11
I H. Environmental Assessment 11
Environmental Justice 11
1
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Replace Chlorine Gas Disinfection System with Sodium Hypochlorite Liquid Feed System
and Sodium Bicsulphite Dechlorination System - Selected Alternative
I
ARCADIS Table of Contents
I
I Tables
I Table B-1: Wastewater Flow Projections 3
4
Table C-2: Population Projections 2000 - 2030 1I 4
Table C-3:20-Year Flow Projections 5
I 9
Table E-1: Present Worth Analysis 10I
Appendices
A Additional Information
I Figures
Conceptual Design Drawings
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Table D-1: Summary of Design Criteria Data for Liquid Sodium Hypochlorite Disinfection and Bisulfite
Dechlorination System
Table C-1: Municipal Population Estimates 1
I ARCADIS
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t A. Summary, Conclusion, Recommendation
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B. Current Situation
1. System Description
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The Roanoke Rapids Sanitary District (RRSD) operates an 8.34 million gallon per day (mgd) wastewater
treatment plant (WWTP) serving the City of Roanoke Rapids, Town of Gaston, and portions of Halifax and
Northampton Counties. The plant was originally constructed in 1963 and has been expanded overtime to its
current capacity.
The Roanoke Rapids Sanitary District has decided to change disinfection systems in order to eliminate the
potential health hazards inherent with chlorine gas and sulfur dioxide gas. This project will replace the
existing gas chlorine disinfection system and dechlorination system at the Roanoke Rapids WWTP with a
new Sodium Hypochlorite liquid feed system and a Sodium Bisulphite dechlorination system. The system
will be designed for the current plant capacity of 8.34 mgd. New construction associated with the proposed
project will include two bulk storage tanks and chemical feed pumps for liquid sodium hypochlorite, to be
housed in a concrete secondary containment structure enclosed by a pre-engineered steel building, and a
chemical truck spill containment vault.
The existing gas chlorine disinfection system was constructed with funding from the State Revolving Fund.
Every effort was made during the design process to use the existing structure to the greatest extent
possible. This building will be modified to house a new sodium bisulphite tank, a sodium hydroxide tank,
chemical feed pumps, and concrete as required for secondary containment.
Based on current population and flow projections, the Roanoke Rapids WWTP is not expected to exceed
the current permitted capacity within the 20-year planning period, through 2030. The plant currently meets
all effluent limits of their National Pollutant Discharge Elimination System (NPDES) permit (NC0024201). No
expansions or other major modifications to this facility are anticipated at this time.
The existing Roanoke Rapids WWTP is rated at 8.34 mgd. The basic processes consist of
screening and grit removal followed by primary clarification, trickling filters, conventional activated
sludge treatment, secondary clarification, chlorine gas disinfection and sulfur dioxide dechlorination.
The existing chlorine gas disinfection system was constructed for a design capacity of 8.34 mgd.
Based on plant operating reports, the typical chlorine feed rate ranges from 0.9 milligrams per liter
(mg/l) to 1.93 mg/l.
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
I ARCADIS
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2. Population and DemographicsI
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4 3. Infiltration/lnflow
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A copy of the NPDES permit effluent limitations page is included with this document. The Roanoke
Rapids WWTP currently meets all permit limits on a regular basis, including the daily maximum limit
for total residual chlorine of 28 micrograms per liter (pg/L).
The current service population is approximately 21,040. The total population within the RRSD
service area, including both served and unserved residents, is approximately 22,692. The
difference in total population and service population is only 1,652, which can be attributed to septic
tank users. The RRSD currently has no plans to provide service to these areas.
The RRSD provides sanitary wastewater collection and wastewater treatment services for all of the
City of Roanoke Rapids, the Town of Gaston and portions of Halifax and Northampton Counties.
The total population of the City of Roanoke Rapids was 16,609 when last estimated in 2006, based
on information from the North Carolina Office of State Budget and Management. The total
population of the Town of Gaston was approximately 960.
Infiltration is defined as the average daily flow of the three wettest consecutive months minus the
expected flow. Expected flow is based on water billing records minus a consumptive loss of 10 to 15
percent. Infiltration greater than 3,000 gallons per day per inch-mile (gpdim) of pipe is considered
excessive.
For the Roanoke Rapids WWTP, the three wettest consecutive months within the last 10 years of
record occurred during July, August, and September 1999. Average daily flow during this period
was 5.4 mgd, based on DMR data. Expected flow was 4.6 mgd, based on water use data. The total
calculated infiltration was 880,000 gpd, or 760 gpdim. This infiltration rate is not considered to be
excessive.
Inflow is estimated from flow records following a one-inch rain event following at least five dry
weather days. Inflow is considered excessive if non-industrial peak flows at the WWTP exceed 275
gpd per capita served. In July 2005, the Roanoke Rapids WWTP experienced a 1.06 inch rain event
preceded by 8 days of dry weather. The peak flow during and after this event was 5.0 mgd. When
adjusted for industrial flow, this equates to a peak flow of 230 gpd per capita.
RRSD staff have estimated that total infiltration and inflow (l/l) may be as high as 1500 gpdim. An
aggressive l/l program is currently in place, and several projects have already been completed, with
a goal of reducing l/l to 750 gpdim.
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
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4. Wastewater Flows
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4 Table B-1: Wastewater Flow Projections
I Industrial
2007 Water Use (mgd)4.0 0.24eConsumptive Loss (mgd)0.4 0.024
Estimated Wastewater Flow (mgd)3.6I 0.22
Flow Commitments (mgd)0.62 0.41
Inflow/lnfiltration (mgd)0.88
Total (mgd)5.73
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C. Future Situation
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The North Carolina Office of State Budget and Management provides population estimates for
municipalities within North Carolina and population estimates and projections for North Carolina
Current wastewater flows were calculated based on criteria defined by the Department of
Construction Grants and Loans. Residential and commercial flow was based on water billing
records minus a 10 percent consumptive loss. Dual metering is not included for industrial users;
consumptive loss was assumed to be 10 percent. Flow commitments were considered current flow,
and non-excessive l/l was included. Results of this calculation are summarized below:
Based on this calculation, the total current and planned flow to the WWTP is approximately 5.73
mgd.
Residential/
Commercial
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
For 2007, the average daily flow to the Roanoke Rapids WWTP was 3.4 mgd, based on DMR data.
Current flow commitments that are not yet tributary to the WWTP equal 620,285 which includes
planned residential developments and commercial flow. Additionally, the RRSD has entered into a
Memorandum of Understanding with Reser’s Fine Foods, Inc. to provide up to 0.41 mgd of
wastewater service to this industry. The total current and planned flow to the WWTP is
approximately 4.43 mgd.
ARCADIS
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Table C-1: Municipal Population Estimates 1
2000 2006
16,957 16,609
I Town of Gaston 973 960 -0.22%
Halifax County 57,370 55,606 -0.51%
I 22,086 21,524 -0.42%
Table C-2: Population Projections 2000 - 2030 1
2000 2005 2010 % Chng/Yr2015202020252030
I 57,370 55,938 54,472 53,189 51,890 50,458 48,944 -0.49%
-0.42%20,198 19,745 19,283
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counties. Table C-1 provides municipal population estimates for the City of Roanoke Rapids, the Town
of Gaston, and Halifax and Northampton Counties for 2000 and 2006. Both municipalities experienced a
decrease in population over this time period. This decline in population is expected to continue through
2030, the 20-year planning period. Population projections for Halifax and Northampton Counties
through 2030 are provided in Table C-2.
Twenty-year flow projections were prepared for the Roanoke Rapids WWTP based on these population
projections, using criteria defined by the North Carolina Division of Water Quality’s Department of
Construction Grants and Loans. Residential flows were based on 70 gpd per capita of projected
residential population growth, commercial flows were based on 15 gpd per capita of projected residential
population growth, and a 10 percent industrial reserve was included based on 10 percent of the design
wastewater flows. Current flows, non-excessive infiltration and inflow, and planned industrial flows were
also included.
The current service population is 21,040, and the average daily flow to the Roanoke Rapids WWTP for
2007 was 3.4 mgd, based on DMR data. Planned commercial flows not yet tributary to the WWTP total
0.62 mgd and planned industrial flows total 0.41 mgd from Reser’s Fine Foods, Inc. A flow acceptance
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
Municipality
City of Roanoke Rapids
Municipality
Halifax County
% Change/Year
-0.34%
Northampton County
’ Source: North Carolina Office of State Budget and Management,
http://www.osbm.state.nc.us/ncosbm/facts_and_figures/socioeconomic_data/population_estimates.shtm
Northampton County 22,086 21,332 21,045 20,612
1 Source: North Carolina Office of State Budget and Management,
http://www.osbm.state.nc.us/ncosbm/facts_and_figures/socioeconomic_data/population_estimates.shtm
ARCAD1S
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Table C-3: 20-Year Flow Projections
I Year
2008 21,040 5.73
2010 20,897 -143 -9,998 -2,142 5.72
2015 20,544 -353 -24,699 -5,293 5.69
2020 20,197 -347 -24,282 -5,203 5.66
2025 19,856 -341 -23,872 -5,115 5.63
I 2030 19,521 -335 -23,469 -5,029 5.60
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letter and a copy of the Memorandum of Understanding for this industrial facility is included with this
report. The total current and planned flow to the WWTP is approximately 5.73 mgd, as calculated in
Table B-1.
The RRSD is predicted to grow at the same rate as the City of Roanoke Rapids, which is currently
decreasing in population at a rate of -0.34 percent per year. At this growth rate, the service area
population will be 19,521 in 2030. Flows at the WWTP will decrease with population, as shown in Table
C-3. In 2030, the projected flow at the Roanoke Rapids WWTP is 4.30 mgd.
A copy of the NPDES permit effluent limitations page is attached to this document. The Roanoke Rapids
WWTP currently meets all permit limits on a regular basis, including the daily maximum limit for total
residual chlorine of 28 pg/L The proposed project will not alter the ability of the Roanoke Rapids WWTP
to continue to meet these limits. Based on plant operating records, the design sodium hypochlorite
dosage will be 2 mg/l. At plant capacity this equates to approximately 140 pounds per day of chlorine.
The existing design dosage of sodium bisulphite will be 1.6 mg/l. This dosage assumes chlorine will be
fed to a 1 mg/l residual at the basin effluent. All chemical feed pumps will be rated for plant capacity in
order to provide 100 percent redundancy.
Service Area
Population
Change in
Population
Change in
Residential
Flow (gpd)
Change in
Commercial
Flow (gpd)
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
Total Flow
(mgd)
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D. Alternatives Analysis
1. Disinfection Alternatives
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1.1. No-Action
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1.2. Replace Chlorine Gas Disinfection System with Ultraviolet Disinfection System
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Ultraviolet (UV) disinfection is an alternative to chlorine disinfection for water and wastewater
treatment. Ultraviolet light is a natural component of the electromagnetic radiation spectrum
emitted by the sun, which acts as a natural disinfectant by inactivating exposed
Chlorine is a common disinfection agent at many water and wastewater treatment plants, and
has been used in both the gas and liquid forms. The Roanoke Rapids WWTP currently
operates a chlorine gas disinfection and sulfur dioxide dechlorination system. Under the no­
action alternative, the Roanoke Rapids WWTP would continue to operate the existing system
with no modifications.
The Roanoke Rapids WWTP currently meets all NPDES permit limits, including the limit for
total residual chlorine. However, there are environmental, public health, and WWTP staff
health concerns associated with chlorine gas disinfection systems, due to the use of chlorine
gas and sulfur dioxide gas. Stricter health and safety regulations exist for use of chlorine gas.
The Roanoke Rapids WWTP is currently required to provide an emergency response team.
Many other facilities have replaced their chlorine gas disinfection systems in recent years in
favor of other technologies that reduce environmental and public health risks.
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
Under the no-action alternative, plant staff and local residents will continue to be at risk of
exposure to chlorine and sulfur dioxide gas. No additional costs would be incurred, but costs
due to maintaining an emergency response team would continue. Currently, annual operation
and maintenance costs for the existing system total approximately $33,000, which includes
$17,900 for emergency response team training and readiness. The RRSD would like to
eliminate these environmental and public/staff health risks.
The following section presents results from an evaluation of alternatives for providing a disinfection
system at the Roanoke Rapids WWTP. Results from this section support the replacement of the
existing chlorine gas disinfection system with a sodium hypochlorite liquid feed system and sodium
bisulphite dechlorination system as the preferred alternative. Three disinfection alternatives exist:
no-action, replacement of the current system with an ultra-violet disinfection system, and
replacement of the current system with a sodium hypochlorite liquid feed system.
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ARCADIS
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2. Biosolids Disposal Alternatives
3. Design Criteria for Selected Alternative
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microorganisms. The effectiveness of any UV disinfection system depends on the applied
exposure time and the UV intensity the microorganism has sustained.
The RRSD maintains a permit from the North Carolina Division of Water Quality's Land Application
Unit for disposal of biosolids (WQ0001989). No change in biosolids production or disposal will result
from the proposed project.
1.3. Replace Chlorine Gas Disinfection System with Sodium Hypochlorite Liquid Feed System and Sodium
Bicsulphite Dechlorination System - Selected Alternative
Liquid sodium hypochlorite is used at both small and large facilities for disinfection of treated
wastewater. This alternative has fewer environmental and public health concerns than gas
chlorine disinfection systems, and would eliminate the need for an emergency response team.
Liquid sodium hypochlorite systems have lower capital costs and lower power requirements
than UV systems. This alternative will allow continued utilization of the existing disinfection
structure, resulting in lower construction costs. The estimated capital cost for a new sodium
hypochlorite liquid feed system and sodium bisulphite dechlorination system is approximately
$901,000. The total twenty-year present worth life cycle cost for this option is $1,610,000.
Construction of a UV disinfection system would have a higher capital cost than a sodium
hypochlorite system. The total capital cost for an 8.34 mgd UV disinfection system is
approximately $1,369,000. A UV disinfection system would eliminate chemical handling and
chemical costs for chlorination and dechlorination, but would incur higher power costs than
chlorine disinfection due to greater energy consumption. Operation and maintenance is
however less overall for UV disinfection.
UV disinfection was not selected for the Roanoke Rapids WWTP due to the high capital costs.
The total twenty-year present worth life cycle cost for this option is $1,739,000.
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
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Bulk storage of liquid sodium hypochlorite will be accomplished by two new 13,680 gallon bulk
storage tanks. It is intended that bulk sodium hypochlorite will be delivered by truck at 13.5 percent
commercial strength. The sodium hypochlorite will then be diluted with water to a 6 percent strength
solution to provide a more stable product. Each 13,680 gallon bulk storage tank will provide up to 48
days of storage of 6 percent sodium hypochlorite at a plant capacity of 8.34 mgd. The bulk storage
d&y) /di
■*“ d' (do
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ARCADIS
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tanks will be housed in a concrete secondary containment structure enclosed by a pre-engineered
steel building. The secondary containment structure will also house two chemical feed pumps that
will dose the chemical to the existing chlorine contact structure influent pipe. Each pump will be
rated for plant capacity in order to provide 100 percent redundancy.
Based on plant operating records, the design sodium hypochlorite dosage will be 2 mg/l. At plant
capacity this equates to approximately 140 pounds per day of chlorine.
Table D-1 provides a summary of design criteria for the liquid sodium hypochlorite and sodium
bisulfite system at 8.34 mgd. Conceptual design drawings are included at the end of this document.
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
The existing gas chlorine cylinder room will be reconfigured to house a 4,469 gallon sodium
bisulphite tank. The tank is sized to accommodate a full truck load and will provide 175 days of
storage at a design dosage of 1.6 mg/l. This dosage assumes chlorine will be fed to a 1 mg/l
residual at the basin effluent. New masonry will be installed in the existing room doorways to
provide secondary containment for the chemical. Two new sodium bisulfite chemical feed pumps
will be installed in the same containment area to meter liquid chemical to the chlorine contact basin
effluent for disinfection. Each pump will be sized for plant capacity in order to provide 100 percent
redundancy-
The existing sulfur dioxide gas storage room will be converted to a sodium hydroxide bulk storage
room. Sodium hydroxide will be used to adjust effluent pH as required. The new bulk storage tank is
intended to hold 1645 gallons of 25 percent sodium hydroxide. Two chemical feed pumps will be
installed in the containment area to meter liquid to the effluent of the chlorine contact basin.
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I Plant Rated Capacity 8.34 mgd
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5. Collection SystemsINo changes to the collection system are included in the proposed project.
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Hypochlorite Storage and Feed Facilities
Chlorine Design Dose
Required Feed Rate at Plant Capacity
Required Feed Rate at 2.5 Peak Rate
Chemical Feed Pump Capacity
Number of Feed Pumps
Number of Bulk Storage Tanks
Volume per Storage Tank
Storage @ Plant Capacity
Bisulfite Storage and Feed Facilities
Sodium Bisulfite Design Dose
Bisulphite Feed at Plant Capacity
Bisulphite Feed Rate at 2.5 Peak Rate
Chemical Feed Pump Capacity
Number of Feed Pumps
Number of Bulk Storage Tanks
Volume per Storage Tank
Storage @ Plant Capacity
The proposed project will be constructed within a currently maintained area of the Roanoke Rapids
WWTP and will replace an existing system. There are no open space or recreational opportunities
associated with the proposed project.
Table D-1: Summary of Design Criteria Data for Liquid Sodium Hypochlorite Disinfection and
Bisulfite Dechlorination System
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
2.0 mg/l
140 Ib/day
350 Ib/day
500 Ib/day @ 6% Sodium Hypochlorite
2
2 tanks
13,680 gallons
48 days each with 6% Sodium Hypochlorite
1.6 mg/l
112 Ib/day
280 Ib/day
600 Ib/day @ 38% Sodium Bisulphite
2
1
4,469 gallons
175 days @ 38% Sodium Bisulphite
ARCAD1S
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6. Interceptors
E. Present Worth Analysis
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Table E-1: Present Worth Analysis
Alternative Capital Cost
No-Action $47,000 $723,000 $723,000IUV Disinfection $1,369,000 $24,000 $370,000 $1,739,000
Liquid Sodium Hypochlorite $900,500 $46,000 $709,500 $1,610,000I
F. User Charges and Financial Capability
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A present worth analysis was performed for the three options detailed in the Alternatives Analysis
Section. All costs assume the WWTP is operating at plant capacity. Current O&M costs were escalated
for the no-action alternative for this comparison. For UV disinfection, O&M costs include power, labor,
and lamp replacement costs. For the selected alternative, O&M costs include chemical costs for sodium
hypochlorite and sodium bisulfate and power costs for chemical feed pump operation. O&M costs were
assumed to increase at a rate of 3 percent per year. Total present worth was calculated based on a 20-
year planning period (2010 through the end of 2029) using a 4.875 percent discount rate. Costs are
summarized in Table E-1.
This analysis shows that the current chlorine gas disinfection system has the highest O&M costs of the
three alternatives. The total present worth of the selected alternative is approximately 8 percent lower
than construction of a UV disinfection system.
The current user charges for a typical residential customer using 5,000 gallons per month is $34.50 for
combined water and sewer service. Water service fees are $13.45, and sewer service fees are $21.05.
The expected user charges, based on an SRF loan with 4 percent interest and a declining annual
payment, are $35.00 per month. This is an increase of $0.50 per month. At this rate, the first year
anticipated revenue per user is $6.35. Annual operation and maintenance costs are not expected to
exceed current operation and maintenance costs.
No interceptors or other changes to the wastewater transmission system are included in the
proposed project.
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
Current Annual
O&M
Total Present
Worth
Present Worth of
O&M
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I ARCADIS
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G. Public Participation
H. Environmental Assessment
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I Environmental Justice
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11g.\wwm\narsd01\0002-wwtp hypo\eng\srf loan applicationtengmeering report.doc
In July, 2008 the RRSD established a General Fund Undesignated Fund Balance Policy. The RRSD is
required to maintain at least 33 percent of the Operations and Maintenance budget, including debt
service and depreciation, in the undesignated fund balance.
The proposed project falls below the minimum criteria contained in 15A NCAC 1C.0408(2)(a) for an
Environmental Assessment (EA). Therefore, a full inter-agency environmental review is not required. An
EA was prepared in accordance with the requirements of the North Carolina Department of
Administration’s EA Guidelines and is included in this application package.
Per discussions with Construction Grants and Loans staff on July 17, 2008, no public participation is
required for the proposed project.
Maps are included with the EA and with this document. Figure 1 is a USGS map showing the proposed
project location. Figure 2 is a soil survey map. Based on review of National Wetlands Inventory (NWI)
mapping for the project area and assessment of the project site, no wetlands are present within the
Roanoke Rapids WWTP site. Riverine wetlands associated with the Roanoke River are located
approximately 500 feet north of the project site. Therefore, no wetland map is included.
Approximately 24 percent and 58 percent of the RRSD service area consists of individuals below the
poverty level and minority populations, respectively, as shown on the attached maps (Appendix A).
Although minority and low-income populations are present, the location of the facility and the service
area do not show preferential treatment to the general population over minority and/or low-income
populations. Minority and/or low-income families have not suffered historically from county provided
services. No impacts to any populations will occur from the proposed project.
Engineering Report
Roanoke Rapids Wastewater
Treatment Plant - Sodium
Hypochlorite System
I Imagine the result
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Roanoke Rapids Sanitary District
Environmental Assessment
I July 2008
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Roanoke Rapids Wastewater Treatment Plant
Sodium Hypochlorite System
(SI ARCADIS
Infrastructure, environment, facilities
Environmental Assessment
ARCADIS
I 1. Proposed Project Description
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I 2. Purpose and Need for the Proposed Project
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ARCADIS Project No. NCRRSD01.0002
The Roanoke Rapids Sanitary District (RRSD) operates an 8.34 million gallon per day (mgd) wastewater
treatment plant (WWTP) serving the City of Roanoke Rapids, Town of Gaston, and portions of Halifax and
Northampton Counties. The plant was originally constructed in 1963 and has been expanded over time to its
current capacity. The WWTP currently serves a population of approximately 21,040.
The proposed project will be constructed within the existing Roanoke Rapids WWTP site. The plant is
located at 135 Aqueduct Road in Weldon, North Carolina, east of the City of Roanoke Rapids. The plant site
is bordered by the Roanoke River to the north and Chockoyotte Creek to the east, as illustrated in Figure 1.
The proposed project will replace the existing gas chlorine disinfection system and dechlorination system at
the Roanoke Rapids WWTP with a new sodium hypochlorite liquid feed system and a sodium bisulphite
dechlorination system. The system will be designed for the current plant capacity of 8.34 mgd. New
construction associated with the proposed project will include two bulk storage tanks and chemical feed
pumps for liquid sodium hypochlorite, to be housed in a concrete secondary containment structure enclosed
by a pre-engineered steel building, and a chemical truck spill containment vault. The pre-engineering steel
building will be approximately 1,800 square feet and 18 feet high. The chemical truck spill containment vault
will cover an additional 576 square feet. The total impermeable surface to be added is approximately 2,376
square feet (0.05 acres).
The existing gas chlorine disinfection system was constructed with funding from the State Revolving Fund.
Every effort was made during the design process to use the existing structure to the greatest extent
possible. This building will be modified to house a new sodium bisulphite tank, a sodium hydroxide tank,
chemical feed pumps, and concrete as required for secondary containment.
The proposed project will be constructed entirely within the existing Roanoke Rapids WWTP site. Grading
and excavation will occur within the site, but no additional land beyond the current site boundary will be
disturbed. No parking spaces, connections to existing utility or sewer lines, or stormwater control devices are
included in the proposed project.
The proposed project will replace the existing gas chlorine disinfection system and dechlorination system at
the Roanoke Rapids WWTP with a new sodium hypochlorite liquid feed system and a sodium bisulphite
dechlorination system. The project will eliminate the potential health hazards inherent with chlorine gas and
sulfur dioxide gas, benefitting WWTP staff and local residents.
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
Environmental Assessment
ARCADIS
3. Alternatives Analysis
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3.1 No-Action
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I 3.2 Replace Chlorine Gas Disinfection System with Ultraviolet Disinfection System
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ARCADIS Project No. NCRRSD01.0002I
Under the no-action alternative, the Roanoke Rapids WWTP would continue to operate the existing chlorine
gas disinfection system with no modifications. The Roanoke Rapids WWTP currently meets all NPDES
permit limits, including the limit for total residual chlorine. However, there are environmental and public
health concerns associated with chlorine gas disinfection systems, due to the use of chlorine gas and sulfur
dioxide gas, and stricter health and safety regulations exist for use of chlorine gas. The Roanoke Rapids
WWTP is currently required to provide an emergency response team. Many other facilities have replaced
their chlorine gas disinfection systems in recent years in favor of other technologies that reduce
environmental and public health risks.
Ultraviolet (UV) disinfection is an alternative to chlorine disinfection for water and wastewater treatment.
Construction of a UV disinfection system would have a higher capital cost and require more construction
than a sodium hypochlorite system. The total cost for an 8.34 mgd UV disinfection system is approximately
$1,369,000. A UV disinfection system would eliminate chemical handling and chemical costs for chlorination
and dechlorination, but would incur higher power costs than chlorine disinfection due to greater energy
consumption. Operation and maintenance is however less overall for UV disinfection.
UV disinfection was not selected for the Roanoke Rapids WWTP due to the high capital costs. The total
twenty-year present worth life cycle cost for this option is $1,739,000.
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
Under the no-action alternative, plant staff and local residents will continue to be exposed to chlorine and
sulfur dioxide gas. No additional costs would be incurred, but costs due to maintaining an emergency
response team would continue. Currently, annual operation and maintenance costs for the existing system
total approximately $33,000, which includes $17,900 for emergency response team training and readiness.
The RRSD would like to eliminate these environmental and public health risks.
The following section presents results from an evaluation of alternatives for providing a disinfection system
at the Roanoke Rapids WWTP. Results from this section support the replacement of the existing chlorine
gas disinfection system with a sodium hypochlorite liquid feed system and sodium bichlorite dechlorination
system as the preferred alternative. Three disinfection alternatives exist: no-action, replacement of the
current system with an ultraviolet disinfection system, and replacement of the current system with a sodium
hypochlorite liquid feed system.
Environmental Assessment
ARCADIS
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3.3.1 Design Criteria
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ARCADIS Project No. NCRRSD01.0002
The RRSD proposes to replace the existing chlorine gas disinfection system at the Roanoke Rapids WWTP
with a sodium hypochlorite liquid feed system and sodium bichlorite dechlorination system. Liquid sodium
hypochlorite has fewer environmental and public health concerns than gas chlorine disinfection systems,
and would eliminate the need for an emergency response team.
3.3 Replace Chlorine Gas Disinfection System with Sodium Hypochlorite Liquid Feed System and Sodium
Bichlorite Dechlorination System - Selected Alternative
This alternative has a lower capital cost and lower power requirements than construction of a UV disinfection
system. This alternative will allow continued utilization of the existing disinfection structure, resulting in lower
construction costs. The estimated capital cost for a new sodium hypochlorite liquid feed system and sodium
bichlorite dechlorination system is approximately $901,000. The total twenty-year present worth life cycle
cost for this option is $1,610,000.
Bulk storage of liquid sodium hypochlorite will be accomplished by two new 13,680 gallon bulk storage
tanks. It is intended that bulk sodium hypochlorite will be delivered by truck at 13.5 percent commercial
strength. The sodium hypochlorite will then be diluted with water to a 6 percent strength solution to provide a
more stable product. Each 13,680 gallon bulk storage tank will provide up to 48 days of storage of 6 percent
sodium hypochlorite at a plant capacity of 8.34 mgd. The bulk storage tanks will be housed in a concrete
secondary containment structure enclosed by a pre-engineered steel building. The secondary containment
structure will also house two chemical feed pumps that will dose the chemical to existing chlorine contact
structure influent pipe. Each pump will be rated for plant capacity in order to provide 100 percent
redundancy.
Based on plant operating records, the design sodium hypochlorite dosage will be 2 mg/l. At plant capacity
this equates to approximately 140 pounds per day of chlorine.
The existing gas chlorine cylinder room will be reconfigured to house a 4,469 gallon sodium bisulphite tank.
The tank will be sized to accommodate a full truck load and will provide 175 days of storage at a design
dosage of 1.6 mg/l. This dosage assumes chlorine will be fed to a 1 mg/l residual at the basin effluent. New
masonry will be installed in the existing room doorways to provide secondary containment for the chemical.
Two new sodium bisulfite chemical feed pumps will be installed in the same containment area to meter liquid
chemical to the chlorine contact basin effluent for disinfection. Each pump will be sized for plant capacity in
order to provide 100 percent redundancy.
The existing sulfur dioxide gas storage room will be converted to a sodium hydroxide bulk storage room.
Sodium hydroxide will be used to adjust effluent pH as required. The new bulk storage tank is intended to
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
Environmental Assessment
ARCADIS
Design Criteria
Plant Rated Capacity 8.34 mgd
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4. Existing EnvironmentI
ARCADIS Project No. NCRRSD01.0002I
Hypochlorite Storage and Feed Facilities
Chlorine Design Dose
Required Feed Rate at Plant Capacity
Required Feed Rate at 2.5 Peak Rate
Chemical Feed Pump Capacity
Number of Feed Pumps
Number of Bulk Storage Tanks
Volume per Storage Tank
Storage @ Plant Capacity
Bisulfite Storage and Feed Facilities
Sodium Bisulfite Design Dose
Bisulphite Feed at Plant Capacity
Bisulphite Feed Rate at 2.5 Peak Rate
Chemical Feed Pump Capacity
Number of Feed Pumps
Number of Bulk Storage Tanks
Volume per Storage Tank
Storage @ Plant Capacity
hold 1,645 gallons of 25 percent sodium hydroxide. Two chemical feed pumps will be installed in the
containment area to meter liquid to the effluent of the chlorine contact basin.
Table 3-1 provides a summary of design criteria for the liquid sodium hypochlorite and sodium bisulfite
system at 8.34 mgd.
The proposed project will be constructed within the existing Roanoke Rapids WWTP site. The Roanoke
Rapids WWTP is located in the Town of Weldon, in Halifax County, North Carolina. The plant serves
customers within the City of Roanoke Rapids, Town of Gaston, and unincorporated areas of Halifax and
Northampton Counties. RRSD maintains a National Pollutant Discharge Elimination System (NPDES) permit
(NC0024201) for this facility for discharge into the Roanoke River.
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
2.0 mg/l
140 Ib/day
350 Ib/day
500 Ib/day @ 6% Sodium Hypochlorite
2
2 tanks
13,680 gallons
48 days each with 6% Sodium Hypochlorite
1.6 mg/l
112 Ib/day
280 Ib/day
600 Ib/day @ 38% Sodium Bisulphite
2
1
4,469 gallons
175 days @ 38% Sodium Bisulphite
Table 3-1: Summary of Design Criteria Data for Liquid Sodium Hypochlorite Disinfection and
Bisulfite Dechlorination System
System Parameter
Environmental Assessment
ARCADIS
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4.1 Topography
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4.2 Soils
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4.3 Existing Land Use
I 4.4 Wetlands
4.5 Prime and Unique Agricultural Lands
ARCADIS Project No. NCRRSD01 0002I
The dominant soil association at the Roanoke Rapids WWTP site is listed as Udorthents, loamy (Figure 2).
The Udorthents association is nearly level to moderately sloping and consists of well drained to moderately
well drained soils on uplands and fluvial terraces where natural soil material has been excavated or covered
by fill material.
The Roanoke Rapids WWTP site consists of an active WWTP. The land use surrounding the WWTP
consists of commercial and industrial development, and wooded undeveloped land.
Based on review of National Wetlands Inventory (NWI) mapping for the project area and assessment of the
project site, no wetlands are present within the Roanoke Rapids WWTP site. Riverine wetlands associated
with the Roanoke River are located approximately 500 feet north of the project site.
The Farmland Protection Policy Act (FPPA) of 1981 (7 CFR Part 658) requires all federal agencies or their
representatives to consider the impact on prime and important farmland of all construction and land
acquisition projects. Three categories of important farmland soils are recognized in North Carolina (USDA,
2006). These consist of prime farmland soils, farmland of unique importance, and farmland of statewide
importance. Prime farmland soils, unique farmland soils, or farmland of statewide importance soils are not
mapped within the Roanoke Rapids WWTP area.
Roanoke Rapids, North Carolina is situated in the Coastal Plain Physiographic Province in the northeastern
portion of the state. The topography within the Roanoke Rapids WWTP site is nearly level, although the site
slopes down to the Roanoke River. Elevations at the WWTP site range from 54 feet above mean sea level
(ft msl) to 59 ft msl, as depicted on the Weldon, North Carolina USGS topographic quadrangle map.
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
The 100-year flood information for the project area was obtained from North Carolina Floodplain Mapping
Program accessed via the internet on July 17, 2008. According to the floodplain information provided, the
WWTP site is located entirely within the 100-year floodplain. The site is bordered by the Roanoke River to
the north and Chockoyotte Creek to the east. The base flood elevation of the Roanoke River in the vicinity of
the project site is 58 ft msl.
Environmental Assessment
ARCADIS
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4.6 Public Lands and Scenic, Recreational, and State Natural Areas
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4.7 Archaeological and Historic Resources
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4.8 Air Quality
RRSD is not currently aware of any odor complaints in the service area.
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ARCADIS Project No. NCRRSD01.0002I
The North Carolina Division of Air Quality (DAQ) does not operate any air quality monitoring stations within
Halifax or Northampton Counties to determine compliance with National Ambient Air Quality Standards
(NAAQS). The closest monitoring stations to the project site are two sites located in Edgecombe County,
southeast of the project site. AirData reports provided by the U.S. Environmental Protection Agency (EPA)
were reviewed on July 22, 2008 to determine if EPA standards are reported as having been exceeded for
criteria air pollutants. The maps identify counties where levels of the selected pollutant exceed EPA
standards and counties nearby that contribute to the problem, nonattainment counties. Edgecombe County
is not listed by the AirData reports as having exceeded air quality standards for the principal air quality
pollutants in 2006, 2007, and 2008. The principal air quality pollutants are particulates (PM-2.5 and PM-10),
sulfur oxides (SOX), nitrogen oxides (NOX), VOCs, carbon monoxide (CO), and lead (Pb).
The North Carolina Wildlife Resources Commission (WRC) does not list any game lands within or adjacent
to the Roanoke Rapids WWTP site. No formally designated parkland, scenic, or recreational areas are
located within or adjacent to the WWTP site.
The North Carolina Natural Heritage Program (NHP) designates significant natural areas if they contain rare
or protected species, high quality examples of relatively undisturbed natural communities, or unusual
geological features. The Roanoke River Fall Line Islands and Roanoke River Fall Zone Aquatic Habitat are
listed as Significant Natural Heritage Areas. These areas abut the WWTP site to the north.
The Roanoke Rapids WWTP site was developed as a wastewater treatment plant in 1963. All of the
structures presently located within the project site were construction in or after 1963. Therefore, no historic
or archaeological resources are located within the project site.
Noise is subject to the federal Noise Control Act of 1972 (PL-92-574) and Quiet Communities Act of 1978
(PL-95-6009), which require standards of compliance and recommend approaches to abatement for
stationary noise sources such as airports, highways, and industrial facilities. The Roanoke Rapids WWTP
area is developed and exhibits day-to-day normal noise conditions representative of a WWTP. The Roanoke
Rapids WWTP is located in a commercial area and no noise issues are known at the plant site. Current
noise levels near the WWTP have not been quantified.
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
4.9 Noise Levels
Environmental Assessment
ARCADIS
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I 4.10 Surface Water/Groundwater Resources
4.11 Forest Resources
4.12 Fish and Their Habitats
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4.13 Wildlife and Natural Resources
ARCADIS Project No. NCRRSD01.0002I
The project site is located in the Roanoke watershed (NCDWQ Subbasin 03-02-08 and USGS Hydrologic
Unit 03010107). No surface water or groundwater resources were identified within the project site. The
Roanoke River (DWQ Stream Index Number 23-(26)) and Chockoyotte Creek (DWQ Stream Index Number
23-29) abut the WWTP site to the north and east, respectively. The Roanoke River from 50 feet downstream
of Highway 48 to Jamesville and Chockoyotte Creek from its source to the Roanoke River are listed as a
Class C water. Class C denotes waters suitable for aquatic life propagation/protection and secondary
recreation. The Roanoke River and Chockoyotte Creek are rated as Fully Supporting their designated uses.
The Roanoke River is also listed as an IR Category 5 water.
The Roanoke Rapids WWTP site is presently developed for its intended use and forested areas are not
present. The site is abutted by undeveloped and natural forested areas, beyond which is commercial
development. Natural forested communities are scattered throughout the undeveloped and developed
portions of the service area. The forested areas include, but are not limited to, mixed hardwood, pine
dominated, bottomland hardwood, and cypress-gum communities.
Aquatic habitat is not present within the Roanoke Rapids WWTP site. The site is abutted by the Roanoke
River to the north and Chockoyotte Creek to the east. Both the Roanoke River and Chockoyotte Creek
provide habitat for numerous species offish. In general, streams in the project area provide suitable habitat
for fish such as bluegill (Lepomis macrochirus), tessellated darter (Etheostoma olmstedi), redfin pickerel
(Esox americanus), redbreast sunfish (L. auritus), warmouth (L gulosus), largemouth bass (Micropterus
salmoides), pirate perch (Aphredoderus sayanus), and American eel (Anguilla rostrata). Many benthic
macroinvertebrates are expected to inhabit the streams.
Benthic invertebrates common in swamp streams are the caddisflies (Nyctiophlax moestus) and
(Pycnopsyche sp.) and the mayflies (Stenonema modestum), (Leptophlebia sp.), (Caenis sp.), and
(Eurylophella doris). The Roanoke River adjacent to the project site is listed as an anadromous fish spawning
area, but is not listed as a fish nursery area. The streams within the study area support anadramous fish such
as blueback herring (Alosa aestivalis), alewife (A. pseudoharengus), hickory shad (Pomolubus mediocris),
and striped bass (Monone saxatilis).
The Roanoke Rapids WWTP site is presently developed as a WWTP and is dominated by maintained,
grass areas. Several landscaped areas are also present within the project site. Vegetation within the
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
Environmental Assessment
ARCADIS
5. Predicted Environmental Impacts
I
5.1 Topography
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ARCADIS Project No. NCRRSD01.0002
maintained, grass areas includes Bermuda grass (Cynodon dactylon), crabgrass (Digitaria sp.), clover
(Trifolium spp.), dandelion (Taraxacum officinale), foxtail grass (Sertaria italica), bead grass (Paspalum sp.),
as well as other forbs commonly found in maintained/disturbed areas. Disturbed lands such as those within
the project area are typically drier than wooded land and do not support a wide variety of amphibian species.
The reptiles are limited to snakes, lizards and skinks such as those inhabiting the pine-dominated
woodlands. Other reptiles found may include the southern cricket frog (Acris gryilus), squirrel treefrog (Hyla
squirella), Carolina anole (Anolis carolinensis), and eastern fence lizard (Sceloporous undulatus). Common
birds of pasture, fallow fields, and hedgerows include eastern bluebirds (Sialia sialis), eastern meadowlark
(Sturnella magna), Northern bobwhite quail (Colinus virginianus), American goldfinch (Carduelis tristis),
towhee (Pipilio erythrophthalmus), field sparrow (Spizella pusilia), barn swallow (Hirundo rustica), American
robin (Turdus migratorius), and red-tailed hawk (Buteo jamaicensis). Typical mammals include the eastern
mole (Scalopus aquaticus), eastern cottontail (Sylvilagus floridanus), raccoon (Procyon lotor), opossum
(Didelphus Virginia), least shrew (Cryptotis parva), and white-tailed deer (Odocoileus virginianus). Habitat for
listed threatened and endangered species is not present within the project site.
This section provides an assessment of the potential direct, secondary, and cumulative impacts that may
result from the proposed project. Direct impacts are immediate impacts related to the construction of the
proposed project. Secondary, or indirect, impacts result from the proposed project later in time or further
removed in the distance, but are still reasonably foreseeable. Cumulative effects result from the incremental
impact of the proposed activity when added to other past, present, and reasonably foreseeable future
activities regardless of the constituents originating from any other activity.
The proposed project will replace the existing gas chlorine disinfection system and dechlorination system
with a new sodium hypochlorite liquid feed system and a sodium bisulphite dechlorination system. All
construction will take place within the existing Roanoke Rapids WWTP site. The proposed project will not
induce growth within the service area.
Minimal direct impacts to topography will result from upgrades to the Roanoke Rapids WWTP. The
topography within the WWTP site is nearly level, although the site slopes down to the Roanoke River.
Upgrades to the WWTP are likely to include placement of fill in lower elevations and removal of soil at higher
elevations to produce a more level site. However, the WWTP site is presently developed and the areas of
construction are already disturbed. Direct impacts to the topography at the WWTP site will be minimal.
The WWTP site is located within the 100-year floodplain; however, since the site has already been
developed and fill material was historically placed within the project boundaries, no significant impact to the
100-year floodplain will occur from the proposed project.
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
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Environmental Assessment
ARCADIS
5.2 Soils
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5.3 Land Use Impacts
N/A
5.4 Wetland Impacts
I N/A
5.5 Prime or Unique Agricultural Land
N/A
I 5.6 Public Lands and Scenic, Recreational, and State Natural Areas
N/A
5.7 Archaeological and Historical Resource impacts
N/A
I 5.8 Air Quality Impacts
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ARCADIS Project No. NCRRSD01.0002
The WWTP site is currently developed and soils within the site have been previously disturbed. Some
disturbance of soils within the site, including excavation, will occur in association with construction of
proposed structures and associated infrastructure. Increased erosion during construction is anticipated at
the WWTP site. A sedimentation and erosion control plan will be implemented along with best management
practices to minimize impacts to soils within the construction areas. No contamination of soils is anticipated
to result from the proposed project. Direct impacts to soils from the proposed project will be minimal. No
indirect or cumulative impact to soils is anticipated to occur from the proposed project since the project will
not induce growth within the service area.
Indirect and cumulative effects to topography and floodplains are not anticipated to result from the proposed
project since the proposed project will not induce growth within the service area.
The proposed project will not create a significant adverse effect on the current air quality of the surrounding
area. Any air quality impacts from the operation of construction equipment will be short-term and minor.
Elevation of airborne pollutants is expected to be insignificant and would represent the level of similar small
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
Environmental Assessment
ARCADIS
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5.9 Noise Level Impacts
I 5.10 Water Resources Impacts
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ARCADIS Project No. NCRRSD01.0002I
on-going construction elsewhere. Public health impacts of emissions during construction should be
negligible.
The purpose of the proposed project is to eliminate environmental and public health concerns due to
chlorine gas and sulfur dioxide gas. Replacement of the existing chlorine gas disinfection system will have
positive effects on air quality.
During construction activities, a temporary increase in noise will occur at the Roanoke Rapids WWTP site
and will not be elevated above the level on similar small on-going construction elsewhere. In general,
construction activities will be performed between 7:00 am and 7:00 pm during weekdays. The capacity of the
Roanoke Rapids WWTP will not increase; therefore, no additional noise is expected.
The primary sources of water quality degradation in rural areas are agriculture and construction. Minimal
direct impacts to surface waters may occur during construction activities at the Roanoke Rapids WWTP
facility. Construction activities associated with the WWTP upgrades could cause erosion and runoff of
sediments and a temporary increase in turbidity into the Roanoke River and Chockoyotte Creek. To
minimize direct impacts to surface waters, erosion and sedimentation control measures will be taken to
ensure that the construction area is contained properly.
Precautions will be taken to minimize direct impacts to water resources from construction by avoiding
spillage and controlling runoff. Such measures include an erosion and sedimentation control plan, provisions
for waste materials and storage, and appropriate maintenance measures. Best management practices will
be utilized for the protection of surface waters, and sedimentation control guidelines will be strictly enforced
during the construction of the project. Oil, fuel, and emissions from construction vehicles may also create
temporary, localized water quality impacts during infrastructure construction. These impacts will be
minimized by instructing contractors to perform vehicle maintenance in areas away from waters and
wetlands and to collect and properly dispose of all used vehicle fluids and containers.
The amount of impervious surfaces within the project site will increase by approximately 2,376 square feet.
The stormwater management plan for this facility will be updated accordingly.
No direct, indirect, or cumulative impacts to groundwater will occur as a result of the proposed project. No
indirect or cumulative impacts to water resources are anticipated from the proposed project.
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
1
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Environmental Assessment
ARCADIS
5.11 Forest Resources
N/A
5.12 Aquatic Resources Impacts
5.13 Wildlife and Natural Vegetation Impacts
5.14 Introduction of Toxic Substances Impacts
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ARCADIS Project No. NCRRSD01.0002I
Direct impacts to aquatic resources, habitats, or communities from construction activities at the WWTP will
be minimal. No direct or indirect impacts to terrestrial or aquatic habitats or resources will occur in the
service area from the proposed project since the project will not induce growth.
Minor direct impacts to terrestrial habitat will occur from the proposed project during construction activities.
Temporary fluctuations of terrestrial species are anticipated during construction activities. Slow moving,
burrowing, and/or subterranean organisms will be directly impacted by construction activities, while mobile
organisms will be displaced to adjacent communities, which consist of the same vegetative community as
the areas in which disturbance will occur.
No direct or indirect impacts to terrestrial species, habitats, or resources will occur in the service area from
the proposed project since the project will not induce growth.
Potential sources of toxic substances during construction may include exhaust emissions, oil, fuel, and other
vehicle fluids. Escape of these substances will be minimized by proper vehicle maintenance and collection
and disposal of fluid containers.
The proposed project will require storage of liquid sodium hypochlorite, sodium bisulphite, and sodium
hydroxide. Minimal environmental impacts are anticipated due to storage of these chemicals. Secondary
containment will be provided within all buildings containing storage tanks. Additionally, a chemical truck spill
containment vault will be constructed to prevent contamination of the WWTP site should spills occur during
chemical delivery.
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
The Roanoke Rapids WWTP is located adjacent to the Roanoke River and Chockoyotte Creek.
Anadromous fish are known to be present in the Roanoke River adjacent to the WWTP. No in-stream
construction will occur at the WWTP site; therefore, direct and indirect impacts to anadromous fish and
aquatic habitats will be insignificant from the upgrades to the Roanoke Rapids WWTP.
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Environmental Assessment
ARCADIS
I
I 6. Mitigative Measures
7. State and Federal Permits Required
• Division of Water Quality, Authorization to Construct
8. Literature Cited
Environmental Protection Agency, AirData Site http://www.epa.gov/oar/data/ Accessed July 22, 2008
United States Department of Agriculture (USDA). 2006. Important Farmlands of North Carolina.
I
1
I
ARCADIS Project No. NCRRSD01.0002I
Roanoke Rapids Wastewater
Treatment Plant Sodium
Hypochlorite System
North Carolina Floodplain Mapping Site http://www.ncfloodmaps.com/default_swf.asp Accessed July 17,
2008
The proposed project will have no significant environmental impacts. Minor impacts will occur during
construction. These impacts will be mitigated through use of an erosion and sedimentation control plan,
stormwater management plan, provisions for waste materials and storage, and appropriate maintenance
measures. Best management practices will be utilized for the protection of surface waters, and
sedimentation control guidelines will be strictly enforced during the construction of the project.
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ARCADIS
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Appendix A
Additional Information
NPDES Permit Limits
- Industrial Flow Agreement
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Environmental Justice
Figures
I Permit NC0024201
A. (1.) Effluent Limitations and monitoring Requirements
I -8.34-MGD ContinuousFlow
37.5 mg/L25.0 mg/L CompositeDaily
45.0 mg/L30.0 mg/L CompositeDaily
EffluentCompositeNH3asNDaily
EffluentGrab28 pg/LTotal Residual Chlorine Daily
EffluentGrab400/100 ml200/100 mlFecal Coliform Daily
(geometric mean)
GrabBetween 6.0 and 9.0 Standard UnitsPH Daily
GrabDissolved Oxygen Daily
Grab EffluentTemperature
EffluentComposite
Effluent1/Month
Effluent1/Month
Effluent1/Month
Effluent
U.D
U.DGrabTemperature
2.
I
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
I
......................... 11,
Recording
Daily
1/Month
Beginning with the effective date and lasting until permit expiration, the Permittee isauthorized to—
discharge treated wastewater from Outfall 001. Such discharges shall "be limited and monitored Uy the
Permittee as specified below:
Influent &
Effluent
Influent &
Effluent
Composite
Composite
Composite
Composite
Grab
Influent or
Effluent
Daily
Effluent
Total Nitrogen
(NO2 + NO3 + TKN)
Total Phosphorus
Total Copper
Total Zinc
Footnotes:
1.
1/Quarter
—:—r Variable
Variable4
CBOD, 5-day, 20°C 2
Chronic Toxicity
Dissolved Oxygen
U: Upstream, at 308 Rollingwood Road. D: Downstream, where U.S. 158 crosses at the Roanoke River. The Permittee
may discontinue influent, effluent and/or stream sampling at such times when adverse stream flows or extreme weather
conditions pose a substantial risk of injury or death to persons collecting samples. On such days, written justification for
sample discontinuance shall be specified in that month’s Discharge Monitoring Report (DMR). Sampling and monitoring
shall resume at the first safe opportunity. •
Monthly Average effluent CBOD5 and TSS concentrations shall not exceed 15% of respective influent value (i.e., 85 /o
removal is required).
3. Chronic Toxicity {Ceriodaphnid) at 1.1 %; January, April, July and October [see Special Condition A. (2.)].
4. Variable Sampling - Upstream/Downstream samples shall be collected 3/Week during June, July, August, September,
and 1/Week during the remaining months of the year.
2Total Suspended Solids
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Roanoke Rapids Sanitary DistrictI
I November 20, 2007
I Re:
Dear Mr Brown,
I
I
The following outlines the provisions of this request:
I
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I cc:
Mr. Tony N. Brown, Interim County Manager
Halifax County
Post Office Box 38
Halifax, North Carolina 27839
Reser’s Sewer Diversion Flow Acceptance
DWQ Fast Track Permit Application
P.O. Box 308
1000 Jackson Street
Roanoke Rapids, NC 27870
[phone]
Fax: [phone]
www.rrsd.org
Board of Commissioners
Leo Green
Gregg Camp
Charles Turner
Page
1/1
C 'IuxurrwMs ,'rd Quire «'^«snar>Jwcol><»LCO.S««ii.Ros« itx
Very truly yours,
R. Danieley Browi/PE
Chief Executive Officer
flow- acceptance request for the subject development. I understand
along Hwy 903 at the 1-95 interchange within
<07 Vi
I am writing in response to your sewer flow acceptance request for the subject development. I understand
your request includes temporary flow' from additional users along Hwy 903 at the 1-95 interchange within
the County s Commerce Park Development. The development is located outside the annexed boundary of
the Roanoke Rapids Sanitary District (RRSD).
• 1 he addition of wastewater to the District’s collection system would be permitted under the RRSD’s
Sewer Use Regulations.
• An Inter-Jurisdictional Agreement will be executed between the County and District prior to discharge
of wastewater into the district sewer system.
• Wastewater discharges from any other sources other than the Commerce Development would be
restricted.
The WWTP facility s NPDES permitted flow is 8.34 MGD and the average daily use is estimated at 4.09
MGD. The District has available sewer treatment capacity to serve the development and would accept flow'
not to exceed 0.41 MGD without a permit modification. Should additional information be required, please
do not hesitate to contact me.
09 = 09 12529310964 12529310964 P.01/04
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This Memorandum of Understanding is dated the day of 3 2008.
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C 'Documenu ud Satings\maEhewsg_ITSO\Locd ScttingjXTCTnpcrary lalCTTKl FQc^Cpnteol.IESMRSDOYTj'Memotfindum of UtdcritodLig !.17^S,do<
WHEREAS, Halifax County presently owns, operates, and maintains a wastewater system that
collects and transports wastewater generated from all existing industrial and commercial
establishments presently located within or in close proximity to the Halifax Industrial Center
including Reser’s Fine Foods, Inc and the Lakewood Truck Stop Complex into the Town of
Weldon’s wastewater transmission system located on Wallace Fork Road; thence, transported on
to the town’s wastewater treatment facility for ultimate disposal, and
MEMORANDUM OF UNDERSTANDING (MOU)
WASTEWATER TRANSMISSION AND TREATMENT
BETWEEN
HALIFAX COUNTY, THE TOWN OF WELDON,
THE ROANOKE RAPIDS SANITARY DISTRICT AND
RESER’S FINE FOODS, INC.
WHEREAS, diversion of this flow (either temporary or permanent) will commence immediately
upon all of the following events having satisfactorily occurred: (1) acceptance of this MOU by
all parties named above, (2) appropriate pretreatment documents between RRSD and Reser’s
WHEREAS, acting upon a request from Reser’s Fine Foods, Inc., Halifax County desires to
permanently divert the wastewater flow discharged from the Reser’s facility together with the
wastewater discharged from the three (3) industrial parcels adjacent to the Reser’s facility
located on Alliance Drive and temporarily divert the remainder of the wastewater flow
generated from the Lakewood Truck Stop Complex and other industrial and commercial
establishments located within or in close proximity to the Halifax Industrial Center from the
Town of Weldon’s wastewater system to the Roanoke Rapids Sanitary District’s existing
wastewater collection system located within the existing Carolina Crossroads development;
thence’, transported through the RRSD’s transmission system to its wastewater treatment facility
for'ultimate disposal, and
12529310954
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I CXPocumeMJ «nd Satin^mst^st ITSO-Lowl ScCingATemponryfattmtt FilMXConUflt.TEJMRBDOY’KVsmorar^ of Unto.Lwdine l-V-OS doc
WHEREAS, once a more permanent Regional Wastewater Transmission System is constructed
to connect with the Roanoke Rapids Sanitary District’s sewer infrastructure, all wastewater
generated from the above describe service area (with the exception of that from Reser s Fine
Foods) will be directed back into the Town of Weldon’s wastewater collection and treatment
system.
WHEREAS, it is.further agreed that during this flow diversion period all wastewater treatment
revenues normally collected by the Town of Weldon, from the above described service area with
the exception of those derived from the Reser’s discharge, will continue to be paid to the Town
of Weldon by Halifax County, and
WHEREAS, Reser’s Fine Foods, Inc. agrees to pay for all engineering, permitting and
construction of all Halifax County transmission system improvements required to place into
service the diversion system generally described above, and
12529310964 P.02/04
Fine Foods, Inc. being accepted and executed by both parties, (3) Halifax County obtaining all
necessary Wastewater Non-Discharge Permits and “Authorizations To Construct of all
necessary improvements required to implement the diversion of wastewater from the Weldon
wastewater system to the RRSD wastewater system, and (4) completion of all construction of
the above referred to Halifax County transmission system, and
JUL-22-2008 09:09
12529310964 12529310964 P.03/04
I
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Halifax County
fest
Gene Minton, Chairmandrea Hines , Clerk
Attest
, Clerk
Roanoke Rapids Sanitary District
Al
7 . Smith , ChairmanJJ
Reser’s Fine Foods, Inc.I Attest
I , President, Corporate Secretary
ODocumcmj tnd ScttinSiMMniW*Sg ITSCALotSd Setings^Tamporary Inwmei Fi>=\Con»OTLlt5XlSSI>OY7J\Mznnoran<jum of UndrrUttding 1-17-O8.doc
In witness, whereof, Halifax County, the Town of Weldon, the Roanoke Rapids Sanitary
District and Reser’s Fine Foods, Inc. caused three copies, all deemed originals, of this
Memorandum of Understanding to be executed by the Mayors, Chairmen, and Clerks; and/or
Presidents and Corporate Secretary of each jurisdiction all pursuant to authority granted by each
jurisdiction’s governing board.
Town of Weldon
Georgs/W- Draper, Jr., Ma;
tZp
■s d. Bailey , Secretary er
JUL-22-2008 09=09
P.04/04
I
I Finance Officer
I Hali:
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I
4Memorandum of Understanding- Page 4 of 4
TOTAL P.04
12529310964
Legality
nunty Attorney ]
County, North Carolina
iouhty Manager
JUL-22-2008 09=09 12529310964
This instrument has been preaudited in the Manner
Required by the Local Government and
* Fiscal Control Act
Page 1 of 1Printable Map Title
7/25/2008^J^tp :/^^nap^g)a. go^^/pri
EnviroMapper for EJ
Cities
County Seat
State Capital
Washington DC
Water bodies
Streams
Counties
Percent Minority
by Blockgroup
oo to
10 20
20 30
33 «
« ten
11
11□
Page 1 of 1Printable Map Title
7/25/2008■JtP :/^jjnap^|^a.gg^/prnUP^ge .htmj
EnviroMapper lor EJ
I I
II
Cities
County Seat
State Capital
Washington DC
Water bodies
Streams
Counties
Percent Below Poverty
by Blockgroup
Ofl 10
10 20
20 XI
30 «3
40 103
Nafi Csro-ui
______V
ARCAD1S
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I
Figures
I
I
5S?
SCALE FIGURE
0.250.1250E 1
1 inch equals 0.25 mile
I I
0.5
■ Miles
SITE LOCATION MAP
Roanoke Rapids
Wastewater Treatment Plant
Halifax County, North Carolina
Source 7 5 Minute USGS Topographic Quadrangle
Weldon and Roanoke Rapids, North Carolina
mi
ii
ee> ■
, .kr.
E
^2)
I
'vt /£
''■/W
-J ‘J
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Roanoke Rapids
Wastewater Treatment
Plant Site
?*■'? ' j. / we®
WeldonA. 4/J
-/Ji J/h
f
^nrv
'Allen __ _fra
N SCALE FIGURE
0wE 21 inch equals 2,000 feetS Source NRCS Soil Survey of Halifax County, North Carolina - 2006
4,000
■ Feet
SOILS MAP
Roanoke Rapids
Wastewater Treatment Plant
Halifax County, North Carolina
1,000 2,000
EiB Vnf
BaA
HO
TtA’
EmC
SlA
1600
EmAMrB
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AW
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• ' * '- Wastewater Treatment
Plant Site
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ARCAD1S
Conceptual Design Drawings
ni
4my
jr
()DRP-IOl |
4® ELEV. 460.00'
2 J 4,
1
5\
17,
.15,21
16,4^
I 6
ElEV. ±59.50'UEV. ±59.50' < i
PUMP STATION
J2Z
—IFIfl?
\.20)
6
36'-O’g1 2j «■
L®
ii
OH6
10,
\
J
10,
2 &
55.| 0RP-101
13,
ZT «■r
PUMP STATION 3'4'O'1'2'6'
SCALE IN FEET
0 9 MAY 08 ISSUED FOfl BIDS
ISSUED FOR BIDS95% OWNER'S REVIEWB20 FEB 08 PROJECT NUMBER DRAWING NUMBER,t/>
70% OWNER'S REVIEWA25 JAN 08 W301NCRRSD01
REV. ISSUED DATE DESCRIPDON
f
V/A
' -H
t-r
I I
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ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PLANT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
i
■T'
PROJECT MANAGER
W. WHEELER
LEAD DESIGN PROF.
D. WILLIAMS
Z
3.
CHECKED BY
W. WHEF1FR
□
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<lT\
©©
rer'1!
—(3)
DEPARTMENT MANAGER
R. WYCHE
TASK/PHASE NUMBER
00002
DRAWN BY
0. WILLIAMS
1-----Tlr------1I
'ISI
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k 4*
11
la
SHEET DTLE
NEW CHEMICAL TRUCK SPILL
CONTAINMENT AREA AND
CONTACT CHAMBER DRAIN PUMP
STATION PLANS AND SECTIONS
b
■to
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<51
M o
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sa/7//
5.
6’ SW________
WV. ELEV. 52.00'
BOTTOM OF EXISTING MANHOLE
EL 41.0
EXISTING GRADE
±EL 58.0'
4" FM________
NV. ELEV. 55.00'
TOP OF EXISDNG MANHOLE
EL 60.0
PUMP ON EL 46.00'
4
W301
1
W301
2
W301
3
W301
PLAN - CHEMICAL TRUCK SPILL CONTAINMENT VAULT
SCALE: 3/S" - I'-tf*
SECTION - CONTACT CHAMBER DRAIN
SCALE: 3/8’ - l'-O’SECTION - CHEMICAL TRUCK SPILL CONTAINMENT VAULT
SCALE: 3/8’ = l'-O’
PU\N - CONTACT CHAMBER DRAIN
SCALE: 3/8’ = l'-O’
□
I I
OCW/
IWW'
DCW/'
/'WWW
DCW/-'
/MWWW
ARCADIS CAM of North Corotno. he.
801 Corporate Center Drive. Suite 300
Roleigh, NC 27607
Tel: [phone] Fox: 919-854-5448
www.ortodis-us.corn
EXISTING CURB A GUTTER
4’ SCH. 40 PVC DRAIN FROM HYPO BLDG
6’ SCH. 40 PVC STORM WATER
10’ CONCRETE PAVING, SLOPED TO STORM GRATE
6'-O’ (XA. PRECAST CONCRETE MANHOLE WITH
EXTENDED BASE
24’ DIAMETER CAST IRON STORM GRATE
4’ CAST IRON FLAP VALVE
SLOPED GROUT TO OUTLET
2’ SCH. 40 PVC DRAIN FROM FILL STATION
10. 6’ COMPACTED ABC
11. |4 O 12’ O.C, E.W. CENTERED IN SLAB
12. PAVEMENT HUMP. SEE DETAIL ON Cl 03.
EXISTING 5'-O’ DIAMETER PRECAST CONCRETE
MANHOLE WITH ALUMINUM ACCESS HATCH.
STAINLESS STEEL DAVIT CRANE BASE
CORE DRILL TOP Of EXISTING MANHOLE ANO
INSTALL 4’ VENT WITH INSECT SCREEN.
CONSTRUCT SIMILAR TO BULK CHEMICAL TANK
TERMINATION DETAIL SHOWN ON W4O1.
4’ (X PIPE FL
4’ tX 90- BEND, a
4’ SDR 21 PVC FM
STAINLESS STEEL GUIDE RAIL ASSEMBLY
PUMP CONTROL PANEL ANO STARTER
6 HOOK S.S. CABLE SUPPORT RACK
10. S.S. LIFTING CABLE
11. PUMP POWER CABLE
12. NEMA 4 JUNCTION BOX
13. CONCRETE FILETS SLOPED TO PUMP
14. 6’ GATE VALVE WITH EXTENSION STEM AND HAND
OPERATOR.
15. 6' SPRING CHECK VALVE
16. 6’ GATE VALVE WDH HANDWHEEL
17. 4’-0’x4'-0’x3*-0’ DEEP PRECAST VALVE VAULT
18. 4’ DRAIN TO WETWELL
19. PVC FLAP VALVE
20. MANHOLE STEP, TYP
21. 24’x24’ ALUMINUM ACCESS HATCH
22. 6’ #57 STONE
23. RESTRAINED FLANGE ADAPTER
O KEYNOTES:
1. EXISTII
Z
3.
I
B
y
ELEV. ±59.00'e
■ PUMP OFF__________
3 EL 44.00'
EXISTING S’ DRAINS
FROM CHAMBER I 4 2
INV. ElEV. 42.75
flSir
~ (?)INV. ElEV. ±55.00'
EXISTING 6’ DRAIN
FROM CHAMBER 2
MV. ElEV. 42.75' ®
I
§
5
1
I
14
rf
A
«
O KEYNOTES
1.
ELEV. ±59.50'^
...............Oo°SoS°S£S°S°5°5°5°o°o&So“o“o”o”oSo5o5o5o5o5o50?05u2u2u„u
INV. ELEV. ±51.75'a
ARCADIS
SDU. NOT WP UMESS 909) A.^ 0*0
ELEV. ±51.67’q
EXISTING 6’ DRAIN
FROM CHAMBER 1
ftINV. ELEV. 42.75'
^6' SW
MV. ELEV. 50.00
■" ELEV.
II
II
II
II
II
LL
II
II
Q-.0
L
L '20;'20,
N
2
4
\<2)
I
J6.16'
'30.
'33;
(26)12,12,12,17,12,
LHWnli
CRP-202 |[CRP-201 «-
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31
| L-202 |
■33J
I®| WH-201 |/\
o
(27)/
(29)'33)uy-202 MV-201,16,I T°I,
J 31,
I Vor
31,331,
1
19,
J
0‘r 2‘y 4'8'
SCALE IN FEET
£ ARCADIS09 MAY 08 ISSUED FOR BIDS
95% OWNER'S REVIEW ISSUED FOR BIDSB20 FEB 08 PROJECT NUMBER DRAWING NUMBER
70% OWNER'S REVIEW25 JAN 08 W203ncrrsdoi
REV. ISSUED DATE DESCRIPTION
I I
I I- >1
ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PLANT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
-® |
I
PROJECT MANAGER
W. WHEELER
DEPARTMENT MANAGER
R. WYCHE
CHECKED BY
W. WHEELER
DRAWN BY
D. WILLIAMS
NEW SODIUM HYPOCHLORITE
12'4 X 16' TALL
(13,680 GALLONS)
VERDCAL FRF TANK /2
-w
SEE TYPICAL CHEMICAL FEED
PUMP ARRANGMENT ON W103.
NEW SODIUM HYPOCHLORITE
x 16' TALL
(13,680 GALLONS)
VERTICAL FRP TANK Ji
TASK/PHASE NUMBER
00002
2" FILL TO BULK TANK
2‘ RECIRC/TRANSFER
2" SHS SUPPLY UNE TO CFP & CRP.
2* NPW
4‘ CONSERVATION VENT
4* VENI FROM BULK TANK TO BUILDING EXTERIOR.
4‘ VENT TERMNADON
3* TANK DRAIN AND OVERFLOW
1" SIGHT TUBE
I
I
II
ARCADIS CAM of North CoroEno, he.
801 Corporate Center Drive, Suite 300
Raleigh, NC 27607
Tet 919-854-1282 Fax: [phone]
www.oraxfe-us.coni
SHEET HILE
NEW SODIUM HYPOCHLORITE
BULK STORAGE AND FEED
SYSTEM SECTIONS
& ^3 z-®
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FINISH GRADE
LELEV. 60.00'
FINISHED aOOR
ELEV. 59.00'
T DRAIN
£ ELEV. 58.00'
FINISHED FLOOR
ELEV. 59.50'
4" DRAIN
£ ELEV. 56.50'
4 DRAIN
£ ELEV. 56.50'
2
W203
1
W203
SECTION - SODIUM HYPOCHLORITE SYSTEM PIPING
SCALE: 3/8' - I'-O-
EUH-201 |
DCW/
./*■**.
DCW/
X KWW
ocwx-x’
WWW
H
LEAD DESIGN PROF.
D. WILLIAMS
f
.1 (2
00
TOP OF WALL,
ELEV. 62.00'
Q KEYNOTES:
2.
3.
w
I
II
1
J
A if
J
§
11
Ii
II
K>] b]
TOP OF WALL,,
ELEV. 62.00'
c- = = = = ^
(37/
WT sw'if
sen, hot wo muss soini no Mn>
j, 2' NPW
^ £ ELEV. 72.00'
SECTION - SODIUM HYPOCHLORITE BULK STORAGE AND FEED SYSTEM
SCALE: 3/8" = I'-O"
5.
6.
7.
8.
10. SCH. 80 PVC TOE UNION CHECK VALVE
11. SCH. 80 PVC TRUE UNION BALL VALVE
12. SCH. 80 PVC TRUE UNION VENTED BALL VALVE
13. Y-STRAINER
14. UNION
15. 8‘ THICK CONCRETE HOUSE KEEPING PAD
16. FRP WALK THRU LADDER
17. CHEMICAL TRUCK FILL STATION
18. 12'x12"x6‘ THICK CONCRETE PUMP PEDESTAL
19. 4" SCH. 40 PVC DRAIN
20. PRE-ENGINEERED BUILDING STRUCTURAL FRAMING
21. EYE WASH STATION
22 FREEZE-PROOF EYEWASH STATION
23. 6‘ THICK CONCRETE STEP
24. 4‘ THICK CONCRETE SIDEWALK
25. 480V DISTRIBUTION PANEL
26. COMBINATION (XSCONNECT/STARTER FOR CRP
27. SCR FOR CFP
28. 120/208V DISTRIBUTION PANEL
29. PLC-201
30. 1-1/4' PW
31. 1' NPW
32. 4" PW
33. 1-1/4' 1W
34. 2" PVC CARRIER PIPE WITH 1/2' FLEXIBLE PVC SHS
35. 2" PW
36. 1/2' NPW
37. 2' SCH. 40 PVC DRAIN
(12/
TIP..
I
I
J a
H
11
ii
I
I i
1
«!
I si
A if
f
Ji
| EUH-201 |
.26,
WH-M1
ELEV. 59.00’
SECTION - BATCH WATER METER
>-20?
| CfP-202E1EV. 62.00'
E1EV. 59.00'
SECTION - SPRINKLER SYSTEM
SECTION - SODIUM HYPOCHLORITE BULK STORAGE
9 UAY 06 ISSUED FOR BIOS
20 FEB 08 95% OWNER'S REVO ISSUED FOR BIDS PROJECT NUMBER DRAWING NUMBER
25 JAN 08 70% OWNER'S REVO W202NCRRSD01
REV. ISSUED DATE DESCRIPTOR
ARCADS 6411 o< North CoroHna, he.
801 Corporate Center Drive, Suite 300
Raleigh, NC 27607
Tel: [phone] Fax: [phone]
■ww.orcodis-vx.com
CHECKED BY
W. WHEELER
PROJECT MANAGER
W. WHEELER
OEPARIMENI MANAGER
R. WYCHE
NEW SODIUM HYPOCHLORITE
12'4 x 16' TALL
(13,680 GALLONS)
VERTICAL FRP TANK /2
'—- TO WH-201
--------FROM WH-201
TASK/PHASE NUMBER
00002
DRAWN BY
0. WILLIAMS
TOP OF WAIT-
ELEV. 62.00' W
SHEET TITLE
NEW SODIUM HYPOCHLORITE
BULK STORAGE AND FEED
SYSTEM SECTIONS
ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PL^NT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
FINISHED FLOOR &
FINISHED FLOOR
DCW/
X
WZ*/
/ WWW
ocwX'
s' WWW
o
S3
I
o
CM
TOP OF EAVE^
ELEV. 80.00' ;
FINISH GRADE.
LELEV. 60.00W’C
-FINISHED FLOOR
* ELEV. 59.00'
LEAD DESIGN PROF.
D. WILLIAMS
3
W202
OkhBQE;
• r FILL TO BULK TANK
2' REORC/TRANSFER
2" SHS SUPPLY LINE TO CEP 4 CRP.
2‘ NPW
4" CONSERVATION VENT
4' VENT FROM BULK TANK TO BUILDING EXTERIOR.
4" VENT TERMINATION
3’ TANK DRAIN ANO OVERFLOW
I” SIGHT TUBE
10. SCH. 80 PVC TRUE UNION CHECK VALVE
11. SCH. 80 PVC TRUE UNION BALL VALVE
12. SCH. 80 PVC TRUE UNION VENTED BALL VALVE
13. PVC Y-STRAINER
14. PVC UNION
15. 8‘ THICK CONCRETE HOUSE KEEPING PAD
16. FRP WALK THRU LADDER
17. CHEMICAL TRUCK FILL STATION
18. 12’x12’»6‘ THICK CONCRETE PUMP PEDESTAL
19. 4" SCH. 40 PVC DRAIN
20. PRE-ENGINEERED BUILDING STRUCTURAL FRAMING
21. EYE WASH STATON
22. FREEZE-PROOF EYEWASH STATION
23. 6" THICK CONCRETE STEP
24. 4" THICK CONCRETE SIDEWALK
25. 2' BACK FLOW PREVENTER ASSEMBLY
26. BATCH WATER METER AND TRANSMITTER
27. COMBINATION DISCONNECT/STARTER FOR CRP
28. SCR FOR CFP
29. DISTRIBUTION PANEL
30. SIGNAL TERMINATION BOX
31. 1-1/4' PW
32. 1' NPW
33. 4' PW
34. REDUCED PRESSURE BACKFLOW PREVENTER
35. SPRINKLER SYSTEM RISER
36. FIRE DEPT. CONNECTION TO SPRINKLER SYSTEM
37. TO SPRNKLERS
38. 1-1/4' TW
39. 2' PVC CARRIER PIPE WITH 1/2' FLEXIBLE PVC SHS
40. 1-1/4' WATER PRESSURE REDUCING VALVE WITH PRESSURE GAUGE
41. 2' PW
42. CHECK VALVE
43. 4' DI 90- BEND, MJ
44. 4' DI 90- BENO. FL
45. 4' DI 90- BASE BENO, FL
46. CONCRETE SUPPORT BLOCK
47. OUTLET FOR FREEZE PROOF WALL HYDRANT
12__.. ' V—-
FINISHED aOOR
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O ARCADIS09 MAY 08 ISSUED FOR BIOS
95% OWNER'S REVIEW ISSUED FOR BIDSB20 FEB 08 PROJECT NUMBER DRAWING NUMBER
70% OWNER'S REVIEWA25 JAN 08 W201ncrrsdoi
REV.ISSUED DATE DESCRIPTION
2
6.
7.
ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PLANT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
PROJECT MANAGER
W. WHEELER
DEPARTMENT MANAGER
R. WYCHE
NOTE: ENTIRE BUILDING SHALL BE
SPRINKLERED WITH A WET-PIPE
SPRINKLER SYSTEM FOR ORDINARY,
GROUP 1 PER NFPA 13 AND
SPECIFICATION SECTION 13930
LEAD DESIGN PROF.
D. WILLIAMS
TASK/PHASE NUMBER
00002
CHECKED BY
W. WHEELER
DRAWN BY
0. WILLIAMS
2.
3.
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SHEET TITLE
NEW SODIUM HYPOCHLORITE
BULK STORAGE AND FEED
SYSTEM PLAN
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ARCADIS GAM oF North Corolino, Inc.
801 Corporate Center Drive. Suite 300
Roleigh, NC 27607
Tel: [phone] Foe 919-854-5448
www.arcodis-us.com
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• 2’ FILL TO BULK TANK
2' RECIRC/TRANSFER
2; SHS SUPPLY LINE TO CHEMICAL FEED PUMP.
4" VENT FROM BULK TANK TO BUILDING EXTERIOR.
4‘ VENT TERMINADON
4' CONSERVATION VENT
3' TANK DRAIN AND OVERFLOW
1* SIGHT TUBE
10. 24’ SEALED MANWAY
11. FRP LADDER WITH SAFETY CAGE
12. e" FLANGED OUTLET FDR L£
13. 8* THICK CONCRETE HOUSE KEEPING PAD
14. 2' V631
15. 2” V321 (OR V322 FOR SODIUM HYPOCHLORITE LINES)
16. FRP WALK THRU LADDER
17. CHEMICAL TRUCK FILL STATION
18. 4“ SCH. 80 PVC DRAIN
19. PRE-ENGINEERED BUILDING COLUMNS
20. EYE WASH STATION
21. FREEZE-PROOF EYEWASH STATION
22. 6" THICK CONCRETE STEP
23. 4" THICK CONCRETE SIDEWALK
24. 2" BACK FLOW PREVENTER
25. BATCH WATER METER
26. COMBINADON DISCONNECT/STARTER FOR CRP
27. SCR FOR CFP
28. 480V DISTRIBUTION PAN!
29. DRY TYPE TRANSFORMER
30. 120/208V DISTRIBUTION PANEL
31. PLC-201
3Z 1-1/4' TW
33. REDUCED PRESSURE BACKFLOW PREVENTER
34. SPRINKLER SYSTEM RISER
35. FIRE DEPT. CONNECTION TO SPRINKLER SYSTEM
36. WATER GONG
37. 2" PVC CARRIER PIPE WITH 1/2' FLEXIBLE PVC SHS
38. 4' D.I. PW
39. 6" DJ. PW
40. 6’x2" DI TEE, RJ
41. 6'x4" 01 TEE. RJ
42. 6' DI 90- BEND. RJ
43. ELECTRICAL DUCT BANK
44. EXHAUST FAN. SEE M201
45. UNIT HEATER. SEE M201
46. INTAKE LOUVER. SEE M201
47. WATER HEATER. SEE P201
48. HOSE BIB
49. FREEZE PROOF HOSE BIB
50. 3'-0" WIDE X T-2’ TALL 1 HOUR RATED FRP DOOR
ANO FRAME DOOR HARDWARE TO MATCH EXISTING BLDG.
PRCMDE CLEAR (AMINATED GLASS, IMPACT RESISTANT.
51. 6'-0" WIDE X 7-2' TALL 1 HOUR RATED FRP DOOR
AND FRAME. DOOR HARDWARE TO MATCH EXISTING BLDG.
PROVIDE CLEAR LAMINATED GLASS. IMPACT RESISTANT.
52. SEE DETAIL ON W401 FOR TERMINATION OF SHS UNES IN
MANHOLE.
PLAN - NEW SODIUM HYPOCHLORITE BULK
scale:ya-.i'-o-storage AND EEED FACILITY
® I
22975
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| CFP-201 | OS'
NEW SODIUM HYPOCHLORITE
12'4 x 16' TALL
(13.680 GALLONS)
VERDCAL FRP TANK fl
.33,
® ELEV. ±60.00'
NEW SODIUM HYPOCHLORITE
12'4 x te" TALL
(13,680 GALLONS)
VERTICAL FRP TANK |2
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ELEV. 176.37 ffi
SECTION - CAUSTIC FEED SYSTEM
SECTION - SODIUM BISULPHITE FEED SYSTEM
KEYNOTES FOR TYPICAL CfP ARRANGEMENT
SECTION - BACK FLOW PREVENTERS
TYPICAL CHEMICAL FEED PUMP ARRANGEMENT
SECTION - SODIUM BISULPHITE BULK STORAGE TANK
SCALE IN FEET
9 MAY 08 ISSUED FOR BIDS DRAWN BY
95% OWNER’S REVIEW ISSUED FOR BIDS20 FEB 08 PROJECT NUMBER DRAWING NUMBER
70% OWNER'S REVIEW25 JAN 08 W103NCRRSD01
SEE TYPICAL CHEMICAL FEED
PUMP ARRANGMENT THS SHEET
'UT
JOI
HEW SODIUM BISULPHITE
6'» X 20' LONG
(4,469 GALLONS)
HORIZONTAL FRP TANK
ELEV. 173.03ffi
ARCADIS C4M of North Coro&Ki, Inc.
801 Corporate Center Drive. Suite 300
Raleigh. NC 27607
TeL- 919-854-1282 Fox: 919-854-5448
www.orcodis-vs.com
CHECKED BY
W. WHEELER
REV. ISSUED DATE DESCRIPTOR
PROJECT MANAGER
W. WHEELER
LEAD DESIGN PROF.
D. WILLIAMS
DEPARTMENT MANAGER
R. WYCHE
TASK/PHASE NUMBER
00002
ELEV. 177.70
qELEV. 163.70
ELEV. 163.70
(gELEV. 176.37
qELEV. 177.70
£ ELEV. 172.70^
SHEET TITLE
EXISTING DISINFECTION BUILDING
NEW SODIUM BISULPHITE
AND CAUSTIC FEED SYSTEMS
SECTIONS AND PUMP ELEVATION
ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PLANT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
t ELEV. 175.70s
ELEV. 160.50
DCW/
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' 2■ CHEMICAL TRUCK FILL CONNECTION.
2" FILL TO BULK TANK
4‘ VENT FROM BULK TANK TO BUILDING EXTERIOR.
24' SEALED MANWAY
FRP LADDER
6' FLANGED OUTLET FOR LI
2* TANK DRAIN
3' TANK OVERFLOW. OVERFLOW PIPING EQUAL TO TOP OF TANK.
f CLEAR PVC SIGHT TUBE
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PULSADON DAMPENER
PRESSURE REUEF VALVE
BACK PRESSURE VALVE
SCH. 80 PVC UNION
SCH. 80 PVC TRUE UNION BALL VALVE
(VENTED BAIL FOR SODIUM HYPOCHLORITE
SERVICE)
FRP CHEMICAL SHELF
CALIBRATION COLUMN
1/2' SCH. 80 PVC PIPE
2‘ SCH. 80 PVC PIPE
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10. 2‘ S0S SUPPLY LINE TO CHEMICAL FEED PUMPS.
11. 2' CAS SUPPLY UNE TO CHEMICAL FEED PUMPS.
12. 2* POLYETHELENE TANK DRAIN CONNECTION.
13. (2) 1/2' SBS & (2) 1/2' CAS FEED LINES TO CONTACT CHAMBER
14. 2' SCH. 80 PVC TRUE-UNION BALL VALVE
15. 1' SCH. 80 PVC TRUE-UNION BALL VALVE
16. CHEMICAL FEED PUMP SCR
17. FRP STAIRS, PLATFORM ANO HANDRAIL
18. SAWCUT EXISTING BLOCK WALL TO USTALL EXISTING H.M. DOOR REMOVED
DURING DEMOLTION AND NEW H.M. DOOR FRAME 2'-0' ABOVE FINISHED
FLOOR ELEVATION.
19. INSTALL NEW /-S' WIDE x Z-2' TALL FRP DOUBLE DOOR ANO FRP
FRAME ON TOP OF NEW 2’-0' TALL MASONRY CONTAINMENT WALL
REMAINING OPEN AREA TO BE RILED WITH 8' MASONRY BLOCK AND BRICK
TO MATCH EXTERIOR SEE ELEVATION ANO DETAILS ON S DRAWINGS. DOOR
HARDWARE TO MATCH EXISTING.
20. 1' NPW
21. 1/2' SCH. 80 PVC TRUE-UNION BALL VALVE
22. 1/2' CAS FEED UNE FROM CAUSTIC FEED ROOM
23. SPRINKLER SYSTEM RISER
24. RRE DEPT. CONNECTION TO SPRINKLER SYSTEM
25. WATER GONG
26. 4' PIPING TO RRE DEPARTMENT CONNECTON
27. EYE WASH SHOWER. SEE P101.
28. 4' 01 PW
29. HOT BOX ENCLOSURE
30. 4' REDUCED PRESSURE BACKFLOW PREVENTER ASSEMBLY
31. 1' BACKFLOW PREVENTER ASSEMBLY
32. 4'x2' Of TEE. FL
33. 4' Dt 90- BENO, FL
34. 1' PRESSURE REDUCING VALVE
35. 1' SCH. 80 PVC UNION
36. 6' CONCRETE SLAB
37. 4' DI 90- BENO, RJ
38. NEW INTAKE LOUVER. SEE MIDI.
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W101NCRRSD01REV. ISSUED DATE DESCRIPTION
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4.
5.
ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PLANT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
DEPARTMENT MANAGER
R. WYCHE
TASK/PHASE NUMBER
00002
PROJECT MANAGER
W. WHEELER
LEAD DESIGN PROF.
0. WILLIAMS
CHECKED Bf
W. WHEELER
DRAWN BY
0. WILLIAMS
2.
3.
GENERAL NOTES:
ALL ELECTRICAL CONDUIT AND WIRE FEEDING HEMS DEMOLISHED IN THIS
PROJECT SHALL ALSO BE DEMOLISHED BACK TO THE EXISTING POWER
PANEL
REPAIR ALL HOLES IN FLOOR AND WALLS FOLLOWING COMPLETION Of
DEMOUTION. GRIND BACK ANCHORGAE DEVICES QUATER INCH, POINT AND
PATCH.
ALL INTERIOR WALLS WILL BE REPAINTED AS SPECIFIED IN SECTION 09900
PRIOR TO BEGINNING NEW CONSTRUCTION ANO TOUCHED UP AS
NECESSARY PRIOR TO FINAL COMPLETION.
ARCAD6 CAM of North CoroBno. Inc.
801 Corporate Center Drive. Suite 300
Roleigh. NC 27607
Tel: [phone] Fox: 919-854-5448
www.ortodis-us.com
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SHEET TITLE
EXISTING
DISINFECTION BUILDING
DEMOUTION PLAN
S
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2.
EXISTING SO, FEED EQUIPMENT
EXISTING CL, FEED EQUIPMENT
EXISTING EXHAUST DUCT
EXISTING UNIT HEATER
EXISTING UNIT HEATER THERMOSTAT
EXISTING EMERGENCY LIGHTING
EXISTING PIC
EXISTING DRY TYPE TRANSFORMER
EXISTING ELECTRICAL DISTRIBUTION PANEL
10. EXISTING UGHTING CONTACTOR (TO BE RELOCATED AS NECESSARY)
11. EXISTING 4’ ROOF DRAIN
12. EXISTING 1‘ NPW
13. EXISTING 1-1/2' SO, ANO CL, GAS LINES TO CONTACT CHAMBER.
14. EXISTING 4' DRAIN
15. ABANDONED PIPING
16. EXISTING EXHAUST FAN THERMOSTAT
17. EXISTING WOOD POWER POLE
18 EXISTING PROCESS MANHOLE
19. EXISTING LIGHT POLE
20. EXISRNG ELECTRICAL RACK
21. EXISTING 2" NPW
22. EXISRNG CHLORINE CONTACT CHAMBER
DEMOUTION KEYNOTES:
I. EXISRNG METAL COUNTER & SINK TO BE DEMOLISHED.
UNDERCOUNTER HOT WATER HEATER AND ASSOCIATED ACCESSORIES
TO BE SALVAGE ANO REINSTALLED.
EXISTING 32' x40" H.M. WINDOW TO BE DEMOLISHED.
DEMOLISH AU EXtSRNG EQUIPMENT IN THIS ROOM ASSOCIATED
WRH THE CL, FEED AND STORAGE SYSTEM.
EXISTING CL, LEAK DETECTOR TO BE RELOCATED.
OEMOUSH AU EXISRNG EQUIPMENT N THIS ROOM ASSOCIATED
WITH THE SO, FEED ANO STORAGE SYSTEM.
EXISTING SO, LEAK DETECTOR TO BE RELOCATED.
EXtSRNG H0U0W METAL DOOR TO BE REMOVED FOR FUTURE USE.
DEMOLISH EXISTING HOUOW METAL FRAME.
EXISTING 3-TON OVERHEAD HOIST MONORAIL ANO ELECTRIC HOIST
TO BE REMOVED AND DELIVERED TO OWNER.
EXISRNG STORAGE RAILS ANO RAIL STOPS TO BE DEMOUSHED.
10. EXISRNG 4’ WIDE x 12' TAU SLIDING DOORS, DOOR FRAMES AND
GUIDE RAILS TO BE DEMOLISHED.
II. EXISRNG POLY CABINET TO BE REMOVED AND DELIVERED TO
OWNER.
12. EXISRNG TRENCH TO BE FILLED WRH CONCRETE F0U0W1NG
DEMOUTION.
13. ONE TON CYLINDERS W1U BE REMOVED BY THE OWNER.
14. EXISRNG COMBINATION DISCONNECT/STARTER TO BE DEMOLISHED.
15. EXISRNG THERMOSTAT TO BE DEMOLISHED.
,16. EXISTING ELECTRIC HOST DISCONNECT TO BE DEMOUSHED.
, EXERNG FREE STANDING CABINET TO BE REMOVED AND DELIVERED
\ TO OWNER.
18. EXSRNG EYE WASH SHOWER TO BE DEMOUSHED F0U0WING
\ INSTALLARON OF NEW EYE WASH SHOWERS. CAP EXSRNG PIPE.
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I
I (Si ARCADIS0 9 MAY 08 ISSUED FDR BIOS SHEET TITLE
I 95X OWNER’S REVIEWB20 FEB 08 ISSUED FOR BIDS
PROJECT NUMBER DRAWING NUMBER
A 25 JAN 08 70X OWNER’S REVIEW
C103NCRRSD01REV. ISSUED DATE DESCRIPTON
PLAN TEES
16' MIN.,
ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PLANT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
SITE
DETAILS
DEPARTMENT MANAGER
R. WYCHE
PROJECT MANAGER
W. WHEELER
TASK/PHASE NUMBER
00002
CHECKED BY
0. BRILEY
DRAWN BY
D. WILLIAMS
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STONE BASE
STAINLESS STEEL FLANGED
COUPLING ADAPTER
THERMALLY WELDED
2‘ WIDE COLLAR
FINISHED
GRADE AS
PER PLANS
ARCADIS GAM o( North Corofcw, Inc.
801 Corporate Center Drive. Suite 300
Raleigh, NC 27607
Tel: 919—854-T282 For 919-854-5448
mnr.arcadis-us.com
CUT NEATLY IN STRAIGHT ONE. CONSTRUCT
NEW PAVEMENT 1' WIDER THAN TRENCH
EXIST. ASPHALT
PAVEMENT
12 GAGE
LINE WIRES-
—WOOD OR—
STEEL POST
TAMP
BACKFILL­
FILTER FABRIC TO BE
BURIED UNDER EXIST.
GRADE OR AS REQUIRED
BY THE ENGINEER
V-NEW CAfiC'
i
s
in
I
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©
9'
13'
TAPERING OF RESURFACED LAYER IN CURB & GUTTER AREAS
NO SCALE
8^
JO'
WIDTH VARIES. SEE PLANS
4'-0' (MINIMUM)
45* BENDS
A | B
10"
12"
90* BENDS
A | B
22 1/2* BENDS
A | B~
16"
18"
18'
'W
25'
28"
16"
J£_
20°-
22"
20'
26"
33"
40"
11"
ly
JC.
16"
18”
21"
23"
27'
28"
36"
42"
50"
62"
83"
88"
21"
24"
2
C103
5
C103
_8_
C103
3
C103
7
C103
CONCRETE CURB AND GUTTER
NO SCALE
6
C103
9
Cl 03
PAVEMENT HUMP DETAIL
NO SCALE
4
C1031
C103
THRUST BLOCK DETAIL
NO SCALE
CONCRETE SIDEWALK DETAIL
NO SCALE —
PIPE PENETRATION DETAIL
NO SCALE
DCW/
X WWW
DCW/’
Xvww
DCW../'
< 6'
__6‘
__8'
12'
16'
-20'
-JO­
S'
6"
12"
14"
18'
22"
32"
36"
18"
20"
21'
24"
10*
IQ-
12"
14-
IB-
20-
22‘
25’
J62
28"
29"
29"
30"
TEES/PLUCS
A | B
w
Z— FILTER
FABRIC
EON
'—COMPACTED
EARTH NOTES:
1. ALL PAVEMENT CUTS SHALL BE REPAIRED WITHIN THREE
(3) DAYS FROM THE DATE THE CUT IS MADE.
2. PROVIDE 1-1/2" TYPE 1-2 SURFACE COURSE IN ROAD RESURFACING
1) WOOD POSTS TO BE BURIED A MINIMUM OF 3'-O',
STEEL POSTS TO BE BURIED A MINIMUM OF 2'-0'.
2) INSTALL SILT FENCE WHERE SHOWN ON DRAWINGS
AND MAINTAIN UNTIL COMPLETION OF GRADING.
18" MIN. _____
TO" & SMALLER PIPE-/
Y— 6x6 - W 1.4 x W 1.4 W.W.F.
CENTERED IN SLAB
7;.fV-z Vi'l
I—ppq'-i
• VERTICAL BENOS
D®1- CABC
.(—PAVEMENT
NOTES: 1. BASED ON 160 PSI TEST PRESSURE AND 2000 PSF SOIL BEARING CAPACITY.
2. ALL BEARING SURFACES TO BE CARRIED TO UNDISTURBED GROUND.
3. USE MEG-A-LUG (PREFERRED) IN LIEU OF BLOCKING ANO ROOOING.
I
ij
r—ASPHALT USED FROM
/ FINISH COURSE.
•*ta
II
SILT FENCE
NO SCALE
PAVEMENT REPAIR DETAIL
NO SCALE
CONCRETE ENCASEMENT
UNDER STRUCTURES DETAIL
NO SCALE
A if
a
cl
,—TIE RODS TO FLOOR, (THRUST RESTRAINT),
----- i / MIN. 4, SAME DIA. AS BOLTS SECURED
/ WITH CONCRETE ANCHORS
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PLAN BENDS
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8' (MIN.) COMPACTED—-^
CABC OR MATCH 6". TYP.-/
EXISTING DEPTH TRENCH WALL-
T□□I
LK5C
[
□D
§
-------w--------
-------- V-------
0 EXISTING r NPVi
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PROPOSED 6' PW
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§
EXISTING 3" NPW EX. 36' D.I. PROCESS PIPE IPROPOSED 6' SW
ftV-UGE UGE
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EXIST. 2" NPW DRYING
PROPOSED 4‘ EM
20'40’60'0
SC«£ IN FEET
I
SHEET TITLEISSUED FOR BIDS09 MAY 08
ISSUED FOR BIDS95% OWNER'S REVIEW20 FEB 08B PROJECT NUMBER DRAWING NUMBER
70% OWNER'S REVIEW C102A25 JAN 08 NCRRSD01
REV. ISSUED DATE DESCRIPTION
liisaal
■
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SEE
PROPOSED
GATE VALVE
f
ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PLANT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
PROJECT MANAGER
W. WHEELER
PROPOSED
PIPING PLAN
CHECKED BY
W. WHEELER
DRAWN BY
D.WILUAMS
il
DEPARTMENT MANAGER
R. WYCHE
LEAD DESIGN PROF.
D. WILLJAMS
TASK/PHASE NUMBER
00002
NEW (2) 1/2" SHS
NSIDE 2" CARRIER
PIPES (ALT. BID)
EXISTING
AERATION BASINS
ED
01
S
X
PROPOSED CATE
VALVE
EXISTING T-
ELECTRICAL
CONDUD .
SEE E201.
SEE W101, W102 4
W103 FOR WORK
REQUIREMENTS DUS
AREA
EXISTING ■
PROCESS
MANHOLE
EXISTING-
PROCESS
MANHOLE
EXISTING 4" 01
REUSE WATER _ v---- _
EXISTING
CURB AND
GUTTER
EXISTING —
DROP INLET
EXISTING
ELECTRICAL
MANHOLE
s
EX1SDNG
CURB ANO
GUTTER
2.
3.
FIELD SURVEY INFORMATION AND BASE PLANS USED
IN THE PRODUCTION OF THIS DRAWING WERE PREPARED BY
BURR 4 ASSOCIATES, PA
1400 GEORGIA AVENUE
ROANOKE RAPIDS, NC 27870
[phone]
/
/
/
/
/
/
I
I
NEW CONDUIT.
SEE E201.
EXt TlMG
ELECTRICAL
DUCTBANK
— EXISTING BACK
flow prevent:
VAULT
EXISTING CHLORINE -
CONTACT CHAMBER
DRAIN MANHOLE. SEE
W301 FOR WORK
REQUIREMENTS.
o
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EXISTING 1-
ELECTRICAL
CONDUIT .
SEE E201.
- V EXISTING
\ ELECTRICAL
\ MANHOLE
EXISTING
CIARIFlERS
EXISTINC
SJJJGE
BEDS
PROPOSED
SODIUM
HYPOCHLORITE
BUILDING
1
EXISTING
BLOWER &
MAINTENANCE
BUILDING
1
C102
DCW/
/ WWW
DCW/'
/ WWW
DCW/?
X*ww
PLAN - PROPOSED PIPING PLJXN
SCALE: 1‘ - 20'
S
&
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EXISTING
ELECTRICAL
DUCTBANK
/ EXISTING M
/ DROP INLET \ K/ § xj
I
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EXISTING WOOO-
UCHT POLE
EXISTING 1" NPW TO
BE CONVERTED TO PW.
DEMOLISH EXISDNC
PIPING HOT USED AND
CAP AT 2" NPW.
tL?JLi
1. ALL UNDERGROUND FEATURES SHOWN HAVE BEEN LOCATED BY
REVIEWING RECORD DRAWINGS ACCUMULATED FROM PREVIOUS
PROJECTS AND MAY NOT BE ACCURATE. ALL OEMS CALLED TO BE
DISTURBED AND/OR TO BE CROSSED ARE TO BE LOCATED TO VERIFY
LOCATION AND ELEVATION OF EACH OEM PRIOR TO WORK BEGINNING
IN THAT AREA. ANY ITEMS FOUND NOT TO BE N EXACT LOCATION,
BUT IN THE GENERAL LOCATION SHOWN, WILL NOT CONSTITUTE
GROUNDS FOR AN INCREASE IN CONTRACT AMOUNT OR TIME
ALL COORDINATES ARE ASSUMED.
ELEVATIONS ARE BASED ON NCVD 29 DATUM.
.£l
EXISTING A
ELECTRICAL // \
DUCTBANK /
^—EXISTING END (2) l/2‘ CAS THIS
-JLEQRICAL____LQCABON,_PfiOV|DE_A«O —’
DUCTBANK INSTALL SAE-T-FLO^EB^
____________INJECTOR OR EQUAL MOUNT
INJECTuR'ABOVE’WAIERTJNC1
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801 Corporate Center Drive, Suite 300
Raleigh, NC 27607
Tel: [phone] Foe 919-854-5448
www.orcadis-us.com
EXIST. 2' NFy _ \
’ NEW (2) 1/2‘ CAS 4^
(2) 1/2- SBS
UNDERGROUND
\ EXISBNG PROCESS
\ MANHOLE
--------------L------ugc—-p—
fl
AROUND KOG 2'SnT / pfes^b.d)
W—V~l/ “
J
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ENb“(2)'l/y'ses THIS—/
___________LOCATION. PROVIDE AND
SorVf^ 190 ,
CONTACT
CHAMBER r-
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JI
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z HYDRANT
¥ |T - 6' TAPPING
. I SLEEVE AND
•° VALVE
g //
lii/fl
uSt 30- D.I. PROCESS PIPE EXISBNG 4‘ 01-^'
REUSE WATERk / PROPOSED DUCTBANK.
/ SEE E20I.________
PROPOSED DU TBWK.
/ SEE E201.
a!
6
I
SEE W201, W202,-----J
W203 4 W301 FOR
WORK REQUIREMENTS
THIS AREA
EXISTING 3' NPW TO -
BE DEMOLISHED UNDER
BLDG FOOTPRINT
sAmanhole/ X
EXISTING CURB AND
GUTTER,-TYP.------UGE
\ ELECTRICAL CONDUIT . NEW (2) 1// CAS 4
% SEE E201. (2) 1/2- SBS
UNDERGROUND.
I
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-----EXISTING^PROCESS
I / / ' PROPOSED 6‘ PW
j/ /u \
/ ,' A gtlSBNC 3* NPW
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4A£UGE
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o SCALE IN EECI® ARCADIS09 MAY 08 ISSUED FOR BIDS SHEET TITLE
I 95% OWNER'S REVIEWB20 FEB 08 ISSUED FOR BIDS PROJECT NUMBER DRAWING NUMBER
A 25 JAN 08 70% OWNER'S REVIEW C101NCRRSD01
REV. ISSUED DATE DESCRIPTION
1
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ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PLANT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
PROPOSED STAKING
AND PAVING PLAN
PROJECT MANAGER
W. WHEELER
LEAD DESIGN PROF.
D. WILLIAMS
TASK/PHASE NUMBER
00002
CHECKED BY
W. WHEELER
DRAWN BY
0. WILLIAMS
OEPARIMENT MANAGER
R. WYCHE
BUILDING CORNER
(FACE OF
CONCRETE WALL)
N:4935.21
E:4927.97
x
CONTROL POINT
EXISTING PK NAIL
N.-4910.36
E:4921.43
ELEV. 61.08'
SEE W201, W202, -
W203 & W3O1 FOR
WORK REQUIREMENTS
THIS AREA
BUILDING CORNER
(FACE OF
CONCRETE WALL)
N:4965.33
E:4902.67
EXISTING f
ELECTRICAL
CONDUIT
SEE W101. W102 &
W103 FOR WORK
REQUIREMENTS THIS
AREA
ARCADIS G4U of North CoroEno, Inc.
801 Corporate Center Drive, Suite 300
Roleigh, NC 27607
Tel: [phone] Fok 919-854-5448
www.orcodis-us.com
EXISTING PROCESS
MANHOLE
EXISTING
CURB ANO
GUTTER
EXISTING —
DROP INLET
EXISTING —
DROP INLET
EXISTING
ELECTRICAL
MANHOLE
EXISTING FIRE
HTDRANT
EXISTING
CURB AND
GUTTER
2.
3.
FIELD SURVEY INFORMATION AND BASE PLANS USED
IN THE PRODUCTION OF THIS DRAWING WERE PREPARED BY
BURR 4 ASSOCIATES. PA.
1400 GEORGIA AVENUE
ROANOKE RAPIDS, NC 27870
[phone]
DENOTES 2" OVERLOAY OF S9.5B ASPHALT
OVER ENTIRE ROADWAY FOLLOWING
COMPLETION OF ROADWAY REPAIRS AFTER
PIPING ANO DUCTBANK IS INSTALLED. PROVIDE
GRADE RINGS FOR PROCESS MANHOLES IN
ROADWAY.
EXISTING WOOD
LIGHT POLE
-EXISTING BACK
FLOW PREVEN1E
VAULT
-------- A-
BdSTING 4‘ 01
REUSE WATER
I
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8 CM
©
CONTROL POINT
EXISTING PK NAIL
N:5000.00
E:5000.00
ELEV. 59.53’
F
FXISTINC
sLujge ■"
BEDS
EXISTING
AERATION BASINS
EXISTING
BLOWER &
MAINTENANCE
BUILDING
=e«STING=
CHLORINE
CONTACT-
CHAMBER
GUTTER-
EXISTING
CLARIFIERS
1
C101I
B
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II
— 60 —----xffl “-d~ -
DCW/
AWW
DCw/
X WWW
ocw/
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T
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EXISTING /\
ELECTRICAL / \
DUCTBANK / \\
--------V----------
I
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a
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-----EXISTING
ELECTRICAL
DUCTBANK
EXIST. 2' NPW 7 \
/EXISTING CHLORINE --------J
/ CONTACT CHAMBER
_z DRAIN MANHOLE SEE
16 W301 FOR WORK
REQUIREMENTS.
1. ALL UNDERGROUND FEATURES SHOWN HAVE BEEN LOCATED BY
REVIEWING RECORD DRAWINGS ACCUMULATED FROM PREVIOUS
PROJECTS AND MAY NOT BE ACCURATE ALL ITEMS CALLED TO BE
DISTURBED AND/OR TO BE CROSSED ARE TO BE LOCATED TO VERIFY
LOCATION AND ELEVATION OF EACH ITEM PRIOR TO WORK BEGINNING
IN THAT AREA ANY ITEMS FOUND NOT TO BE IN EXACT LOCATION,
BUT IN THE GENERAL LOCATION SHOWN. WILL NOT CONSTITUTE
GROUNDS FOR AN INCREASE IN CONTRACT AMOUNT OR TIME
ALL CORRLXNATES ARE ASSUMED.
ELEVATIONS ARE BASED ON NCVD 29 DATUM.
Il
&S.
r
^^^^^/ExisTlNC'30; bT PROCESS PIPE’
EXISTING 36’ D.I PROCESS PIPE
— UGC ——
I
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El
»sr- ?; M
PLAN - PROPOSED STAKING AND PAVING PL7\N
SCALE r = 20'
>S£Q
SODIUM
I
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SUL HOT WDD (MESS SfcXD AND DATED
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6'12 MIN.■HOUSE KEEPING PAD
E18* MIN.
I ■CONC. FLOOR SLAB i.S. CLAMP
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7
S.S. CHAIN “■t o
2.
3.r
4-
8.
STATION2'-0’
0-7-2'-O-0-7‘
1
2 2.
9'3.
i 1 .a 5I«o
■4 5
T
T
ELEV, 62.00’-4-3 o 6,
I28'8’
?o
RUNG ~4‘ VENT PIPEr—6
ELEV. 59.50’4-01
F1EV. 59.00'I SIDE VIEWFRONT VIEW
FILL STATION
0 ARCAD1S SHEET TITLEISSUED FOR BIDS0 9 MAY 08
I ISSUED FOR BIDS95% OWNER’S REVIEW820 FEB 08 DRAWING NUMBERPROJECT NUMBER
70% OWNER’S REVIEW W401A25 JAN 08 NCRRSD01
REV. ISSUED DATE DESCRIPTION
I
-SCH 80 PVC CHEMICAL PIPE
-COUPLING
PVC HOSE BARB
CARRIER
DIA. TO SUIT
_______PER FIELD _______ _
CONDITIONS
ROANOKE RAPIDS SANITARY DISTRICT
WASTE WATER TREATMENT PLANT
SODIUM HYPOCHLORITE SYSTEM
ROANOKE RAPIDS, NORTH CAROLINA
CHEMICAL SYSTEMS
DETAILS
MECHANICAL COUPUNG
SCHEDULE 80 PVC
PROJECT MANAGER
W. WHEELER
DEPARTMENT MANAGER
R. WYCHE
LEAD DESIGN PROF.
0. WILLIAMS
TASK/PHASE NUMBER
00002
CHECKED BY
W. WHEELER
DRAWN BY
0. WILLIAMS
-PIPE SUPPORT BY TANK
MAUFACIURER (3 REQUIRED)
Ji
2’ POLY QUICK CONNECT
CAM-LOCK DUST CAP
WITH CAM ARMS
X ::
2
2" SCH. 80 PVC TRUE
UNION BALL VALVE
BLOCK
OUT
LINK SEAL OR
APPROVED EQUAL
FRP SCREEN------
SANDWICHED
BETWEEN FLANGES
A" SCH. 80 PVC FLA
3" SCH. 80 PVC
OVERFLOW
1-5/8' HEAVY-------
DUTY FRP UNISTRUT.
INSTALL 24' O.C.
4' SCH. 80 —
PVC 90- BEND
4" SCH. 80 —
PVC 90* BEND
CORED HOLE OR
PVC SLEEVE
TOP Of-
STORAGE
TANK
3' SCH. 80 A
PVC FILL
2' SCH. 80 •
PVC TRUE
UNION BALL
CHECK VALVE
MUD VALVE, SIZE AS
REO’D. SEE PLANS
■SHAFT. SUPPORT AS
RECOMMENDED BY MANUFACTURER
FL-C-PE STAINLESS
STEEL FLOOR PIPE
WITH TAPPED FLANGE
TOP 0F-
STORAGE
TANK
-STANDARD TANK NOZZLE,
FLANGED AND CUSSETED, SIZE
AS SHOWN ON PLAN
TOP OF-
STORAGE
TANK
-----^^MANUFACTURER’S CABLE
TO TRANSMITTER
-SONIC LIQUID LEVEL
SENSOR (EXTEND AS
REQUIRED FOR ACCURATE
LEVEL DETECTION)
4* THICK (MIN.) OR
AS REQ’D. FOR PIPING
ALIGNMENT
NOTE: COORD. EXACT SIZE ANO LOCATION OF EQUIPMENT PADS
AND ANCHOR BOLTS W/ EQUIPMENT MANUFACTURER
|4 0 12' EW OR AS
SPECIFIED ELSEWHERE
FLANGE
LO + 10'
14' MIN.
WALL SLEEVE SEE
DETAIL THIS SHEET.V
4' SCH. 80 -
PVC FIANCE
\-STANtMR0 TANK NOZZLE,
FLANGED AND GUSSETED, SIZE
AS SHOWN ON PLAN
TOP OF
EXISTING BLDG
OR EAVE ON
NEW BUILDING.
ARCADIS GAM of North CoroRno, Inc.
801 Corporate Center Drive. Suite 300
Raleigh, NC 27607
Tel: [phone] Fax: [phone]
www.orcodis-us.com
BUILDING
WALL
r
I
9
I
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I
6
I
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,4 DOWELS 0 18'
AT PERIMETER OR AS
SPECIFIED ELSEWHERE
I'Zi
\_P1PE SUPPORT BY TANK
MAUFACTURER (3 REQUIRED)
1
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ELEC. CONDUIT
!
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WALL SLEEVE.
SEE DETAIL
THIS SHER.
5.
6.
-T
ANCHOR BOLT W/ 4" (MIN.)
EMBED. 4 6 1/2x3 x 3‘
WELDED AT BUTT.
2" MIN. n
- T-H
g
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§
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WALL
(SEE PLANS)
TOP OF
RUNG
8
W401
6
W401
10
W401
7
W401
12
W401
9
V/401
14
W401
CHEMICAL TRUCK FILL CONNECTION DETAIL
3/4' ■= 1’-o‘
1
W401
2
W401
11
W401
J.
W401
<13
W401
5
W401
FRP WALK THRU LADDER DETAIL
3/4' = I’-O"
4
W401
TANK OVERFLOW DETAIL
3/4' = r-o"
TANK VENT TERMINATION DETAIL
r - r-o'
PLAN - CHEMICAL TRUCK FILL
3/4' = T-0'
WALL SLEEVE DETAIL
J/4' = f-0'
SECTION - CHEMICAL TRUCK
3/4' = r-0'
TYP._ INTERIOR EQUIPMENT PAD
1' = l‘-Ou
TANK FLUSH DRAIN DETAIL
V«- " r-0'r———————
FRP PUMP SHELF DETAIL
r = r-o'
DCW/
X WWW
ocw/''
/ WWW
S' MM
c/l Of
RUNG
s
2
■K W
3/8' THICK 90’ FRP FITTING.
SECURE TO FLOOR WITH 3/8'4
STAINLESS STEEL SLEEVE ANCHORS.
SECURE TO UNISTRUT WITH 3/8'»
STAINLESS STEEL HARDWARE
/-S' SCH. 80 PVC TRUE
/ UNION BALL VALVE
6' BLIND FLANGE
W/ 1' TAP • t
KEYNOTES:
2' THICK. 2' x 2' MESH MOLDED FRP
GRATING. SECURE PUMPS TO GRATING WITH
STAINLESS STEEL HARDWARE.
3' x 2' x 3/8' THICK FRP ANGLE SECURE
WITH 3/8'4 STAINLESS STEEL HARDWARE
3' x 3' x 3/8' THICK FRP ANGLE
CONTINUOUS. SECURE TO WALL WITH 5/16'4
STAINLESS STEEL SLEEVE ANCHORS 0 12'
O.C. SECURE TO GRATWC WITH 3/8'4
STAINLESS STEEL HARDWARE
3' x 3' X 3/8' THICK FRP ANGLE 6'
LONG. SECURE TO WALL WITH (2) 5/16'4
STAINLESS Sil i L SLEEVE ANCHORS.
1-5/8' HEAVY DUTY BACK TO BACK FRP
UNI-STRUT. SECURE WITH 3/8'4 STAINLESS
STEEL HARDWARE
3/8' THICK 90- FRP FTTRNG. SECURE TO
FLOOR WITH 3/8'4 STAINLESS STEEL SLEEVE
ANCHORS. SECURE TO CRATING WITH 3/8'4
STAINLESS STEEL HARDWARE
2' POLY QUICK CONNECT
CAM-LOCK MALE ADAPTER
W/ MALE THREAD
£ a
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STANDOFF
CUPS
MUD VALVE DETAIL
3/4' = r-0'
1-5/8' HEAVY DUTY FRP - '
UNI-STRUT. SECURE WITH
3/8'4 STAINLESS STEEL
HARDWARE AND CLAMPS.
LEVEL SENSOR DETAIL
3/4' = r-o"
TANK FILL DETAIL
3/4* = I’-O' (SIMILAR FOR NPW & RECIRC
TANK TOP CONNECTIONS)
3“ SCH. 80 PVC ~\
OVERFLOW
fi if
CA of
SHEAR .
PLATES
<n
KEMJES;
1. WATER TIGHT SINGLE LEAF ALUMINUM
HATCH
2' SCH. 80 PVC TRUE UNION VENTED
BALL VALVE
2' POLY QUICK CONNECT CAM-LOCK
COUPLING WITH DUST CAP
2' SCH. 80 45’ BENO
WALL SLEEVE SEE DETAIL ON W211.
FRP UNISTRUT SUPPORT
2' PVC DRAIN
2' PVC FLOOR DRAIN
e ELEV. 62.00’
RIGID, PIPE TO FLEXIBLE
3/4'-r-°' p|PE- TRANS|T|0N
ELEV. 59.50’
At
gw NOT Wie (MBS 9GMD WD WID
April 4, 2008
Dear Mr. Brown:
The
If you have any questions or comments, please call me at 919-791-4255.
Raleigh Regional Office
Water Quality Section
cc: RRO/SWP files
Central Files
phone [phone]
facsimile [phone]
Mr. R. Danieley Brown, CEO
Roanoke Rapids Sanitary District
P.O. Box 308
Roanoke Rapids, NC 27870
1628 Mail Service Center
Raleigh, NC 27699-1628
Subject: Compliance Evaluation Inspections 4/2/2008
Roanoke Rapids Sanitary District
NPDES Permit No. NC0024201
and Stormwater Permit No. NCG110091
Halifax County
Customer Service
1-877-623-6748
NCDE.W
Sincerely,
Myrl A. Nisely J
Environmental Chemist
North Carolina^l^artm^fel Michael F Easley, Governor
William G. Ross Jr., Secretary
>f Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
Description of the WWTP
The facility is comprised of bar screen, grit chamber, dual primary clarifiers, dual trickling filters
three aeration basins, dual secondary clarifiers, gaseous chlorination with contact chamber,
echlonnation, dual secondary sludge thickeners, three anaerobic digesters, lime stabilization
sludge storage and sludge drying beds. Discharge is into the Roanoke River, class C in the
Roanoke River Basin.
> l
NC0Q242Q1
The plant was in compliance. Comments from the inspection are shown on the attached checklist.
1 his is a well run plant, with all operational units functioning as they should.
NCG110091
The plant has a sound stormwater program and is implementing it. See the attached checklist,
installation of observation stations at many of the outfalls is commendable.
On April 2, 2008 Myrl Nisely of the Raleigh Regional Office conducted an annual compliance
inspection of the Samtary District WWTP facility. Following that inspection, a stormwater
compliance inspection was also carried out. Thanks to Greg Camp and Greta Glover for their
assistance.
EPA
NPDES
12lNC0024201
Entry Time/Date Permit Effective Date
07/07/0109:50 AM 08/04/02Roanoke Rapids WWTP
135 Aqueduct Rd Exit Time/Date Permit Expiration Date
Roanoke Rapids NC 27870 12/03/3108/04/0201:25 PM
Other Facility Data
Alan Gregg Camp/ORC/919-536-4884/
Name, Address of Responsible Offidal/Title/Phone and Fax Number
Operations & Maintenance
Facility Site Review
(See attachment summary)
Name(s) and Signature(s) of Inspector(s)Agency/Office/Phone and Fax Numbers Date
Myrl Wisely RRO WQ//919-791-4200/
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page #1
3l
United States Environmental Protection Agency
Washington, D C 20460
yr/mo/day
08/04/02
Records/Reports
m Effluent/Receiving Waters
Contacted
No
QA
72H
Form Approved.
OMB No. 2040-0057
Approval expires 8-31-98
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
///
Water Compliance Inspection Report
Section A: National Data System Coding (i.e., PCS)
J11
Fac Type
20U
Inspection Type
18lil
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
| Flow Measurement
Sludge Handling Disposal
Inspector
19EJ
—Reserved--------------------
75| I I I I I | | 8073| | I74
Signature of Management i A Reviewer / * / /
________(.7 W//
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Permit
■ Self-Monitoring Program
Laboratory
R Danieley Brown,PO Box 308 Roanoke Rapids NC
27 8 70//252-53 7-9137/2 525379136
B1
71 u
_______________________________________________Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW also include
POTW name and NPDES permit Number)
J17
Date
'
Transaction Code
1 [nJ 2
Agency/Office/Phone and Fax Numbers
/
Remarks
21| I I I I I I I I I I I I I I | | | | | | | | | | I I | | | | | | | | | | | | | | | | | | | |66
Inspection Work Days Facility Self-Monitoring Evaluation Rating
671| 69 701 |
Permit Yes No NA NE
■ (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:
Record Keeping Yes No NA NE
■ ODDAre records kept and maintained as required by the permit?
■ Is all required information readily available, complete and current?
Are all records maintained for 3 years (lab. reg. required 5 years)?■ ODD
Are analytical results consistent with data reported on DMRs?■
Is the chain-of-custody complete?■ o
Dates, times and location of sampling
Name of individual performing the sampling
Results of analysis and calibration
Dates of analysis
Name of person performing analyses
Transported COCs
Are DMRs complete: do they include all permit parameters?■ ODD
Has the facility submitted its annual compliance report to users and DWQ?■
■
■ ODO
Is the ORC certified at grade equal to or higher than the facility classification?■ o
Is the backup operator certified at one grade less or greater than the facility classification?■
Is a copy of the current NPDES permit available on site?■
Facility has copy of previous year's Annual Report on file for review? o
Comment:
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping?■ o
Page #3
(If the facility is - or > 5 MOD permitted flow) Do they operate 24/7 with a certified operator on each shift?
Is the ORC visitation log available and current?
Owner - Facility: Roanoke Rapids WWTP
Inspection Type: Compliance Evaluation
Permit: NC0024201
Inspection Date: 04/02/2008
Operations & Maintenance Yes No NA NE
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge ■
Judge, and other that are applicable?
Comment:
Bar Screens Yes No NA NE
Type of bar screen
a.Manual
b.Mechanical
Are the bars adequately screening debris?■ o
Is the screen free of excessive debris?■ o
Is disposal of screening in compliance?■
Is the unit in good condition?■
The plant has a primary bar screen and a backup unit. The same is true
Grit Removal Yes No NA NE
Type of grit removal
a.Manual o
b.Mechanical
Is the grit free of excessive organic matter?■ o
Is the grit free of excessive odor?■ □00
# Is disposal of grit in compliance?■ ODD
Comment:Rebuilt in the last year
Flow Measurement - Effluent Yes No NA NE
# Is flow meter used for reporting?■ ODD
Is flow meter calibrated annually?■ ODD
Is the flow meter operational?■ ODD
(If units are separated) Does the chart recorder match the flow meter?■ ODD
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained?■ ODD
Are the receiving water free of foam other than trace amounts and other debris?■ ODD
Page #4
Comment:
for grit removal.
Permit: NC0024201
Inspection Date: 04/02/2008
Owner - Facility: Roanoke Rapids WWTP
Inspection Type: Compliance Evaluation
Comment: Calibrated last on March 19, 2008. Calibrations are done quarterly rather
than annually. Staff gage provided a flow of 3.71 mgd, while the electronic meter said
3.65 mgd, a difference of 1.26%. This is within the 10% allowable variation.
Effluent Pipe Yes No NA NE
■
Primary Clarifier Yes No NA NE
Is the clarifier free of black and odorous wastewater?■ 000
Is the site free of excessive buildup of solids in center well of circular clarifier?■ 000
Are weirs level?■ ODD
Is the site free of weir blockage?■ DOO
Is the site free of evidence of short-circuiting?■ ODD
Is scum removal adequate?■ ODD
Is the site free of excessive floating sludge?■ ODO
Is the drive unit operational?■ DOO
Is the sludge blanket level acceptable?■ ODD
■ ODD
Yes No NA NE
Is the filter free of ponding?■ ODD
Is the filter free of leaks at the center column of filter's distribution arms?■ ODD
Is the distribution of flow even from the distribution arms?■ o
Is the filter free of uneven or discolored growth?■ o
Is the filter free of sloughing of excessive growth?■
Are the filter’s distribution arms orifices free of clogging?■
Is the filter free of excessive filter flies, worms or snails?■
Comment:
Influent Sampling Yes No NA NE
# Is composite sampling flow proportional?■
Is sample collected above side streams?■
Is proper volume collected?■
Page#5
Permit: NC0024201
Inspection Date: 04/02/2008
Owner - Facility: Roanoke Rapids WWTP
inspection Type: Compliance Evaluation
If effluent (diffuser pipes are required) are they operating properly?
Comment: The alternatate pipe, used for high river flows of about 25,000 cfs, is
supplied by a diesel pump. The engine is run monthly, and the effluent is discharged
via this outlet once a quarter for about half a day. This discharge point is at a higher
elevation than the old system that was directed toward Chockyotte Creek, so the river
must be at very high flows before the plant is forced to use the secondary system
Is the sludge blanket level acceptable? (Approximately % of the sidewall depth)
Comment: Blankets typically run from 2 to 4 ft out of total sidewall depth of 12 ft. Are
drawn down 3x/day to the anaerobic digesters.
Trickling Filter
Influent Sampling Yes No NA NE
Is the tubing clean?■
Is proper temperature set for sample storage (kept at 1.0 to 4.4 degrees Celsius)?■
Is sampling performed according to the permit?■
Comment:Temp = 2.5 degrees C
Aeration Basins Yes No NA NE
Mode of operation Plug flow
Type of aeration system Diffused
Is the basin free of dead spots?■ o
Are surface aerators and mixers operational?■
Are the diffusers operational?■
Is the foam the proper color for the treatment process?■ 0 o
■ o Does the foam cover less than 25% of the basin’s surface?
Is the DO level acceptable?■ o
Is the DO level acceptable?(1.0 to 3.0 mg/l)■
Comment:
Secondary Clarifier Yes No NA NE
Is the clarifier free of black and odorous wastewater?■ o
Is the site free of excessive buildup of solids in center well of circular clarifier?■ □00
Are weirs level?■ □□□
■ 000Is the site free of weir blockage?
■ ODDIs the site free of evidence of short-circuiting?
Is scum removal adequate?■ ODD
Is the site free of excessive floating sludge?■ ODD
■ ODDIs the drive unit operational?
■ ODDIs the return rate acceptable (low turbulence)?
Is the overflow clear of excessive solids/pin floc?■ ODD
Is the sludge blanket level acceptable? (Approximately % of the sidewall depth)■ ODD
Comment:
Yes No NA NE
Are cylinders secured adequately?■ ODD
Page #6
Blankets at 2 ft out of 15 ft. Are measured 3x/da y
Disinfection-Gas
Permit: NC0024201
Inspection Date: 04/02/2008
Owner - Facility: Roanoke Rapids WWTP
Inspection Type: Compliance Evaluation
Disinfection-Gas Yes No NA NE
■ Are cylinders protected from direct sunlight?
■ oIs there adequate reserve supply of disinfectant?
■ o 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?
■ □00Does the Stationary Source have more than 2500 lbs 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-.1000-0006-3068.)
10/30/2003If yes, then when was the RMP last updated?
Comment:
De-chlorination Yes No NA NE
Type of system ?
■ oIs the feed ratio proportional to chlorine amount (1 to 1)?
Is storage appropriate for cylinders?■ o
# Is de-chlorination substance stored away from chlorine containers?■ O
Comment:
■ OAre the tablets the proper size and type?
Are tablet de-chlorinators operational? ■
Number of tubes in use?
Comment:
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional?■ DOO
Is sample collected below all treatment units?■ o o
■ 0Is proper volume collected?
■ Is the tubing clean?
Is proper temperature set for sample storage (kept at 1.0 to 4.4 degrees Celsius)?■ o
■
Anaerobic Digester Yes No NA NE
Type of operation:Floating cover
Page #7
Is the facility sampling performed as required by the permit (frequency, sampling type representative)?
Comment:
Permit: NC0024201
Inspection Date: 04/02/2008
Owner - Facility: Roanoke Rapids WWTP
Inspection Type: Compliance Evaluation
Anaerobic Digester Yes No NA NE
Is the capacity adequate?■
# Is gas stored on site?■ o
Is the digester(s) free of tilting covers?■
Is the gas burner operational?■
Is the digester heated?■
Is the temperature maintained constantly?■
Is tankage available for properly waste sludge?■ o o
Comment:
Yes No NA NE
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? ■
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? ■ o
(Vacuum filters) Is polymer mixing adequate? ■
One modest sized pile of solids is being accum ulated until enough to
Laboratory Yes No NA NE
Are field parameters performed by certified personnel or laboratory?■
Are all other parameters(excluding field parameters) performed by a certified lab?■
# Is the facility using a contract lab?■ o
Is proper temperature set for sample storage (kept at 1.0 to 4.4 degrees Celsius)?■
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees?■ o
■ 0
Sample storage = 1.7 degrees C, Fecal Incubator = 44.5, BOD incubator =
Standby Power Yes No NA NE
Page #8
Comment:
landfill.
Permit: NC0024201
Inspection Date: 04/02/2008
Owner - Facility: Roanoke Rapids WWTP
Inspection Type: Compliance Evaluation
Incubator (BOD) set to 20.0 degrees Celsius +/-1.0 degrees?
Comment:
20.4
Some of the gas produced is used for heating the digesters, rest is flared
Drying Beds
Standby Power Yes No NA NE
■ Is automatically activated standby power available?
Is the generator tested by interrupting primary power source?■ 0 o
Is the generator tested under load?■ 0
■ 000Was generator tested & operational during the inspection?
■ ODDDo the generator(s) have adequate capacity to operate the entire wastewater site?
Is there an emergency agreement with a fuel vendor for extended run on back-up power?■ ODD
Is the generator fuel level monitored?■ ODD
Page #9
Owner - Facility: Roanoke Rapids WWTP
Inspection Type: Compliance Evaluation
Permit: NC0024201
Inspection Date: 04/02/2008
Comment: Generator is inspected and serviced quarterly by an outside contractor.
The engine is run monthly, and is tested under a load quarterly. Next load test will be
this month. The generator is also used for load shedding for Dominion Power several
times per year. Improved switch gear reportedly makes the switch to standby power
without a momentary shutdown of power that is so disruptive of computers and lab
equipment.
PERFORMANCE ANNUAL REPORT 2007
ROANOKE RAPIDS SANITARY DISTRICT
GENERAL INFORMATIONI.
A.
Responsible entity: Roanoke Rapids Sanitary District, Dan Brown, CEOB.
C. Person in charge/contact
1.
RECEIVED
MAR - 5 2008
D. Applicable Permit(s)
1.
E. Description of C.S.:
The Roanoke River Interceptor collects wastewater from basins located on the north side of
Roanoke Rapids. The Gaston and Northampton basins are included in this service area. The
Interceptor begins just west of NC 48 in Roanoke Rapids. There are three primary basin
pump stations and one secondary pump station along the route. Pipe sizes for the Interceptor
ranges from 18” to 30”.
The Chockoyotte Creek Interceptor handles the south side of Roanoke Rapids and three sub­
divisions, Lake View Park, Greenbriar and Lincoln Heights, outside the Roanoke Rapids city
limits. The Interceptor begins east of Zoo Road. There is one primary basin pump station
along the route. Pipe size ranges from 12” to 30”.
The system has five sewer lift stations. Two stations are located in the Gaston, NC system.
One of these serves a Northampton County School and the other station pumps all flows
from Northampton County across the NC 48 Bridge crossing the Roanoke River to the
Roanoke River Interceptor. The remaining three pump stations are located within the
Roanoke Rapids system. Two of the stations, Belmont and Poplar Springs, discharge to the
DENR - WATER QUALITY
POINT SOURCE BRANCH
C.S.: North Carolina Environmental Management Commission System-wide
Wastewater Collection System Permit No. WQCS00027
C.S.: Charles Turner, Operator in Responsible Charge (ORC)
Roanoke Rapids Sanitary District
PO Box 308
Roanoke Rapids, NC 27870
Phone: [phone]
The collection system consists of approximately 130 miles of sewer lines. The sewer lines
within Roanoke Rapids, Gaston and all sub-divisions, which connect to the two main
Interceptors, range in size from 8” to 12”. There are two main Interceptors transporting
waste to the WWTP.
P MAR-T 2008
I I __—
Regulated entity: Roanoke Rapids Sanitary District, Collection Systems (C.S.) and J, .. . < iC
Wastewater Treatment Plant (WWTP) __— -----— --------
2. WWTP: Gregg Camp, Operator in Responsible Charge (ORC)
Roanoke Rapids Sanitary District, WWTP
135 Aqueduct Road
Weldon, NC 27890
Phone: [phone]
2. WWTP: NPDES NC0024201
Land Application (L.A.): WQ0001989
Stormwater (General): NCG110000
F. Description of WWTP:
PERFORMANCEn.
A. Description of overall 12 month performance, noting highlights and deficiencies:
The performance of the system in 2007 was good.
The wastewater treatment plant is rated at 8.34 milhon gallons per day (MOD). Peak flow is
rated at 12.5 MGD.
Treatment processes at the wastewater plant include grit and rag removal. This is followed by
primary clarification, trickling filter biological secondary treatment, activated solids
treatment, secondary clarification, final effluent chlorination/dechlorination processes, and
final pH adjustment
During these processes solids are removed from two locations. Primary clarification removes
settleable solids from incoming wastewater to an anaerobic digestion unit. Here the solids, in
the absence of oxygen, receive pH adjustment, mixing, and heating to produce a stabilized
material. Once the solids are stable, excess water is decanted and returned to the plant for
further treatment The stabilized, thickened solids are treated with lime for odor control then
removed to a holding tank to await land application.
There are two pumping stations in the wastewater plant distributing wastewater into and
through the plant. Of these two pump stations, one has the capacity to pump 20 MGD and the
other 27 MGD respectively. Also, to aid these two pump stations; a storm water pump station
has been installed. This station intercepts rainwater, an unnecessary load to the treatment
plant, and removes it before entry to the plant. It has the capacity to pump 11.5 MGD. In
conjunction to these two pump stations there is one pump station with capacity of 21 MGD to
remove treated flows from the plant in the event of high river levels preventing normal gravity
flow discharge. Various others pumps and mixers are located throughout the plant for process
control.
The Fat, Oil and Grease (FOG) program initiated in 1995 has been a good tool in
preventing Sanitary Sewer Overflows (SSO’s). We also have a fulltime employee for the
FOG Program to inspect all records and grease traps. He also educates all restaurants
about grease and how it affects our sewer lines. The use of local newspaper for FOG
program educational ads and the distribution of brochures to restaurants and fast food
businesses have also been effective. Inspection of records and grease traps is an ongoing
measure to prevent SSO’s.
Preventive Maintenance of at least four horns a week cleaning sewer mains has also been
a good tool in reducing sewer backups. The use of degreasers in pump stations on a
regular schedule has proven to be very effective in preventing lift station down time.
Also all pumping stations are checked and cleaned a minimum of twice weekly.
Roanoke River Interceptor while the Greenbriar Pump Station discharges to the Chockoyotte
Creek Outfall.
Secondary clarification removes solids from the activated solids process. Here, solids in the
presence of oxygen, ph control, and mixing, accumulate in excess. They are removed,
chemically stabilized, and added to a holding facility. All stabilized solids are analyzed and
land applied according to their nutrient value, ceiling and accumulative requirements.
1. C.S.:
The Roanoke Rapids Sanitary District’s collection system received its inaugural permit in
2001 under the North Carolina Environmental Management Commission Department of
Environment and Natural Resources system wide wastewater collection system­
permitting program.
Some of the repairs and upgrades in 2007 include the following.
The SCADA system that monitors all lift station 24 hours a day, 365 days a year has
prevented lift station overflows.
The permit also contains daily maximum residual chlorine of 28 micrograms per liter
(ug/1), a weekly mercury maximum of 868 nanograms per liter (ng/1), and ph must be
maintained between 6 and 9.
Current plant capacity is 8.34 million gallons per day (MGD) with a peak flow of 12.5
MOD. For 2007 the yearly average low flow was 3.0MGD with minimum of 2.3MGD.
The yearly average high flow was 4.8MGD with a maximum of 8.2MGD. The yearly
average total flow was 3.6MGD or 43% of the plant capacity. This is a 20% decrease
over the previous year.
The decrease was a result of the drought experienced in 2007. The less rain there is,
infiltration into the collection system is lowered. Also, because of the drought, creeks
and streams and the water table ran lower. This too attributes to less inflow into the
system. Also, the collection system department has been very aggressive in identifying
and repairing problems in the system.
In response the District has maintained staff, critical parts inventory, equipment
inventory, made plans to better address extreme conditions, upgraded critical equipment,
planned back up or alternative operations, and requested better responsiveness from sub­
contractors. Responses are continuous and increasing.
In 2007, the District continued to be very active in maintenance issues and concerns. The
WWTP spent in excess of $523,000 on maintenance and repairs to equipment, supphes
and materials necessary to operate equipment and capitalized monies to replace and
upgrade equipment.
Rag conveyor. The rag conveyor moves debris to a dumpster which is collected by a rag
remover. This debris is removed at this location to prevent downstream line blockages or
clogged pumps and mixers. Due to the length of the rag conveyor, the moving
mechanism or auger was constructed with a central bearing. This bearing caused jam up
and spillage of the debris being removed. Also, if jammed severely enough, the conveyor
would trip out. This in turn would disable the rag remover. With this system inoperable,
incoming flow could back up and possibly cause a spill. To remedy this, the central
bearing was removed and replaced with a “trough” sleeve eliminating the need for the
central bearing. Now spillage has nearly been eliminated and there are no jams tripping
Under the current permit, the District has a weekly effluent total suspended solids (TSS)
limit of 45 mg/1 and a monthly limit of 30 mg/1. Also a weekly carbonaceous
biochemical oxygen demand (CBOD) limit of 37.5 mg/1 and a monthly limit of 25 mg/1.
The yearly average for TSS was 22.1mg/l and CBOD was 4.8mg/l. Using yearly
average influent values for the same parameters this calculates to a 91.6% and 96.9%
removal rate respectively. The permit requirement is 85%.
The District is keenly aware of and has been very responsive to increasing environmental
awareness. House Bill 1160, Clean Water Act of 1999, ratified by the North Carolina
General Assembly on July 20th and signed into law July 21st by the governor, has
heightened this awareness. This bill codified as Chapter 329 session laws became
effective October 1999.
2. WWTP:
Overall performance for 2007 was good. There were no NPDES permit limits violations.
(See below) There were no monitoring or reporting violations.
out and disabling of the removal conveyor system. There is also no back up of the
incoming flow.
Influent pump station. The influent pump station transfers all incoming flow into the
plant. The station is equipped with four pumps. Their pumping capacities are 2,4, 7, and
7 million gallons per day (MGD). One of the 7 MOD pumps received a new motor and
rail set-up. Now both 7 MGD pumps have the same set-up. This allows inventorying
only one spare motor that fits either pump. Also, the new motor is more compatible with
the drive system which regulates the speed of the pump depending on incoming flow.
The new motor is also more energy efficient. The 2 and 4 MGD pumps are the “work
horses” of this pump station. They handle the majority of the work on normal flow days.
This spares wear and tear on the larger 7 MGD pumps which are needed in cases of
higher flows. They alternate based on run time hours until flows increase to a level
where both are needed together. Both of the “work horse” pumps, after many years of
service, were rebuilt to restore maximum pumping capacity. Another advantage of using
these pumps regularly is when repairs are needed; the cost is less because they are
smaller pumps in the station. The pump station is controlled by a level sensing probe.
The probe chosen was constructed of stainless steel, a proven material for this type of
application. The probe worked well for some time but eventually failed. It was learned
that a newer probe material, ceramic, was available and may be even better for this
application. The pump station is now equipped with this type of sensor.
Grit conveyor. The grit conveyor moves grit to a dumpster which is collected by a grit
remover. Grit is removed at this location to prevent excessive wear on downstream
equipment. The support bearing is located at the bottom of the conveyor. The bearing
wore out and was allowing the conveyor to drop into the conveyor trough causing
excessive wear. The bearing was replaced and operation of the equipment was restored
to normal before any extensive damage occurred.
Primary Clarifier. The plant has two primary clarifiers, both of which are original pieces
of equipment put on line in 1963. Their purpose is to settle out solids in the incoming
flow. The solids are removed for additional treatment by another process. Due to low
flow, one of the clarifiers was taken off line. This also allowed for inspection and
repairs, if necessary. During the inspection, it was discovered that the base support,
which drives the bottom scraper mechanism and the water distributing column were
severely worn. Plans have begun to replace the drive mechanism/water distributing
column. The primary clarifier could be returned to service but with reduced efficiency.
There is a surface skimming mechanism also driven by the base support. It collects
floatable solids, mainly grease, and deposits it into a collection pit. A pump is located in
the pit which is used to pump the pit out as it fills. One of these pumps failed and had to
be replaced. A spare pump was used in its absence. While the primary was drained, two
isolation valves, normally submerged, were exposed. Advantage of this situation was
taken and the valves ere taken apart and cleaned. They have now been restored for future
use.
Recirculation Pump Station. The Recirculation Pump Station (RPS) has three pumps,
each capable of pumping 3 million gallons per day. With the use of these pumps as
dictated by operation conditions, water can be recycled through treatment processes for
additional treatment. The motors on these pumps are original motors from plant start-up
in 1963. One of the motors failed and was replaced by a new high efficiency, lower
power consumption motor.
Filter Effluent Pump Station. The filter Effluent Pump Station (FEPS) collects all
incoming flow that has traveled through the primary clarifiers and trickling filters. It then
transfers this water on to the secondary system for further treatment. This station is
equipped with four pumps. Their pumping capacities are 2.1, 7.9, 7.9, and 9.2 million
gallons per day (MGD). Here as with the influent pump station, the smaller pump is the
“workhorse”. At this station the two 7.9 MGD pumps alternate after equal run times to
aid the 2.1 MGD pump during normal flows. The 9.2 MGD pump is the high flow pump
at this station. The 2.1 MGD after many years of service was in need of repair. Repairs
were scheduled, however when the pump was to be removed, the discharge valve was
discovered broken. This meant that the pump could not be removed from service until
the broken valve was replaced. The valve was ordered and installed. This required
storage of influent flow into the equalization tank. Once installed, flow was returned to
the plant along with the stored water, the pump isolated, removed and repaired. The
electronic control system of this pump station is protected by an electrical surge
protection device. The device was damaged from a surge but protected the control
system. The protection device has been replaced.
Disinfection. The final phase of the water treatment process is disinfection (pathogen
kill) and disinfection removal. The former is done with the use of chlorine. The latter is
done to remove residual chlorine because of its negative effect on stream aquatic life.
The chemical used to remove chlorine is sulfur dioxide. The chemicals are injected with
eductor pumps. These pumps are used to create a vacuum on the chemical storage tanks
and to disperse them in a manner which ensures a complete mix of wastewater and
chemical. The chlorine eductor pump failed and had to be replaced with a spare. The
original connection from chemical storage tanks to the eductor pump was wire reinforced
hose. Over time these hoses failed and would not allow the feed of chemical. The hoses
Secondary System. The Secondary System is a biological treatment system consisting of
three aeration basins and two secondary clarifiers. The system is operated by the use of
various valves and piping, control panels, traveling siphon bridges with skimmer arms,
gear boxes, motor and pumps, and blowers. Various repairs and upgrades were done.
Each year different basins and clarifiers are drained to check for preventative
maintenance. One basin drained had some flange/pipe work that was required. The
gearbox that drives siphoning/skimming mechanism of one of the secondary clarifiers
wore out and had to be rebuilt. Associated with the gearbox are cable pulleys at each end
of the clarifiers. A large pulley on the drive end of the clarifier and a smaller pulley on
the return end. The return pulley on one of the clarifiers failed. This has been a repair
more common than in other areas of this system. In an attempt to change this, one of
these return pulleys was taken to a local fabrication shop. Improvement ideas were
discussed and the wheel was retrofitted with a large more durable center bearing. The
pulley wheels at each end of the clarifiers are connected with a 400 foot drive cable. One
of these cables broke and was repaired as well. There is a skimming apparatus on each
clarifier and consists of two blades each (four total). They are used to remove floatables
from the surface of the clarifiers. One of the blades got hung up in the trip mechanism
that lowers the blades to skim on the return end or at the drive end where the arms are
raised. A price to replace was received from the manufacturer supplier. Again a local
fabrication shop was contacted and given an example of the design. The skimmer arm
was duplicated for a cost savings of 20%. The arm was installed and is operating well.
The skimmer arms push floatable solids into a dump trough that is attached to an end
wall. One of the dump troughs became detached. The trough was reattached using more
durable materials and of large size to secure it better. The control panel which operates
the gearbox has a computer pic operating process. One of the clarifier computers pic’s
malfiinctioned and was replaced. The wiring was deteriorated, causing malfunctioning of
the computer pic control. The wiring was replaced and the system went back to operating
correctly. The secondary system recycles solids for reuse in the treatment process. It
uses two pumps, usually one at a time that is rotated on a weekly basis. These pumps
return recycled solids to the treatment process for additional treatment. One of these
pumps failed and had to be rebuilt to return to use. Blowers are used to supply air to the
aeration basins for the treatment process. There are four blowers, two 75 horsepower and
two 100 horsepower. Their use is dependent on the oxygen demands of the aeration
basins. One of the 75 horsepower blower’s internal components failed. This is a major
failure. There was a spare used 75 horsepower on site; however, it needed an inlet
bearing kit installed to prepare it for use. The failed blower was sent off for repairs. The
secondary system was the emphasis area of the plant for SCADA. Much of the
supporting equipment for control of the system can now be viewed and tracked via
computer system in the operations building control room.
Primary Sludge Pump Station. The purpose of the Primary Sludge Pump Station (PSPS)
is to remove settled solids from the primary clarifier and skimmed surface solids
collected in the scum pit. The station is equipped with two pumps to achieve this. The
solids are sent to digester stabilization process. Just downstream of the pumps are
observation points, sight glasses that allow the operator to observe the solids. Only the
thickest of solids are removed to the digester to prevent overloading of the digester with
water. The sight glasses are equipped with container with cleaner fluid and a squeegee to
keep the glass clean. They were over ten years old and deteriorated beyond repair. Both
of the sight glasses were replaced to maximize solids removal operation.
were replaced. However, hard pipe was used to ensure a more durable connection.
Technology advancements have produced safer chemical alternatives for disinfection and
disinfection removal. Chlorine can be replaced with sodium hypochlorite and sulfur
dioxide can be replaced with sodium bisulfate. These alternative chemicals are being
considered. Plans and drawings are being produced and a review process has begun to
study the possibilities on this change over process.
Biosolids Thickening. Excess solids from the secondary treatment process are thickened
by gravity settling tank and a drum concentrator with the use of polymers. Polymers
create a reaction which causes solids to concentrate (floc) and water separate. The
purpose is to minimize the solids removed from the treatment plant because removal
charges are based on the amount of gallons removed. The drum concentrator uses porous
fabric with polymer in the concentrator to thicken solids and porous fabric on the solids
removal conveyor for water removal. The removal conveyor works with air pressure and
a tracking system to keep the fabric properly located on the conveyor. An air cylinder
and its hoses on the tracking system failed and had to be replaced. Polymer use is vital to
solids thickening. It is received in concentrate form and pumped to a bulk storage tank.
Intermittent mixing of the tank is required to keep the chemicals used in its make up from
separating. This is accomplished through the use of a mixing pump. The pump works
off a timer. Its pipe work to the tank started leaking. The leak was repaired to prevent
wasting of the polymer. The storage building for the bulk tank is supported by rails. One
of the rails failed causing the building to tip. This caused binding in the pipe work from
the bulk tank to the day use tank. The building was re-leveled and new support added.
Water is important to the solids thickening process. It is used to dilute the concentrated
polymer to correct concentration for the thickening reaction. Water is also used by the
drum concentrator to keep the fabrics used for dewatering the solids clean. Pressure and
volume of the water is critical to both of these processes. The entire building lost both
pressure and volume. The problem was traced to the building back flow preventer. This
component keeps chemicals and wastewater from entering the clean water supply. It had
deteriorated over years of use. Installing a new preventer, returned flow pressme and
Digesters and Stabilization. Digesters receive solids removed from primary clarifiers.
With heat and mixing and occasional chemical addition for pH control, solids are
stabilized. The heat system is a boiler heat exchanger. To maximize the use of fuel used
to heat the boiler, the heat exchanger tubes were cleaned. Also, as a part of the heating
process, heated water must be internally re-circulated. This is accomplished with a water
recirculation pump. The pump is equipped with an impeller that pushes (re-circulates)
the water through the heat exchanger. The heat exchanger became noisy and temperature
dropped. Upon investigation the impeller was found broken. It was replaced and
operation returned to normal. The chemical used to maintain pH is caustic (Sodium
Hydroxide, 25%). The caustic pump controls were facing a wall. This made seeing
control knobs and readings difficult to see and adjust. The piping and stand were
reconfigured to turn the pump face outward. This helped operation of this system to be
more manageable. The digester building has a basement. The basement contains several
pumps and motors and other process control equipment. The basement collects water
from internal processes, wash-down for clean up and groundwater seepage. To protect
this equipment from water damage, the building contains a sump pump. Hie sump pump
wore out and was replaced with a submersible pump. This type of pump application
should be more efficient and reliable.
Lime Stabilization. Thickened solids are stabilized through the use of lime. Time and
pH’s dictate the stabilization requirement Lime is received in dry form and transferred
to a storage/feed silo. The feed motor of the silo dispenses dry lime into a slurry mixing
tank for dilution. Both the feed motor and mixing motor on the slurry tank in the silo
failed and were replaced. After dilution and mixing, the slurry is gravity feed to a
holding tank containing the thickened solids. There the slurry is mixed into the solids to
equally dispense the time and to keep it in contact with the solids. There are two of these
holding tanks with a mixer in each. The mixer in one of the tanks is from original
installation in the late 1980’s. It has been rebuilt several times. Now obsolete because
lack of replacement parts and because of advances in technology, the mixer was replaced.
The new mixer is more efficient and uses less energy to do the same job. The old mixer
is in storage and can be used for back-up purposes.
Equalization Storage. The wastewater plant has the equipment, pumps, valving, and
piping to store wastewater in the event of high flows or maintenance repairs and then
return it to the plant for treatment. The piping in place was above ground temporary
PVC. Some of this piping was stationary; however some of it had to be located in place
for use. It was a difficult task especially for a single manned shift. With some additional
valve installation, the use of some minor piping addition with existing piping, the return
piping is now completely hard (metal) piped. It is permanently intact and located below
ground.
Solids Storage. Biosolids once stabilized are stored in a tank capable of holding one
million gallons. The solids are held and mixed in this tank to prevent settling until
removed for disposal. Even with mixing, over time settlement inevitably occurs and
approximately once a year needs cleaning. The tank was cleaned to remove this
settlement. Cleaning also allows for the tank to be inspected for integrity. It also allows
for access to the mixers for preventative maintenance.
Bank Stabilization. At one time bank erosion from stream flow encroached on the
wastewater plants main sewer lines and plant processes. A bank stabilization project was
begun to halt this threat. The process uses a stitched bagging system laid on the ground
which grout is pumped into. After drying, the hardened bags prevent erosion. The
vertical slopes were done in sections to spread the expense out over time. Approximately
1000 ft. of vertical slope would be protected. Before the projects completion a large
storm undermined a section of the vertical slope. It was repaired and the vertical slope
project completed. However, it was realized from the storm damage additional protection
would be required. It was decided that the base (or toe) of the vertical slope would need
horizontal protection. This horizontal protection extends out approximately six feet.
Again it was to be done in sections to spread expenses. Two sections, one in spring and
one in the fall, were completed. To date approximately 800 ft. have been completed
leaving about one 200 ft. section to complete this project.
volume to the building. The polymer dispensing pump to the gravity tank is controlled
by a variable frequency drive so quantities of polymer can be controlled as required by
the thickening process. The control became erratic. The pump was ruled out as the
problem. Attention was then focused on the drive. The speed control knob
(potentiometer) was bad. Once replaced, the dispensing control was restored. Once
solids are thickened, they must be transferred to another downstream process with the use
of a transfer pump. The transfer pump logs long run time hours in the movement of the
thickened solids. After much use, both pump and motor had to be replaced to restore the
pumping volume.
SCADA (Supervisor Control and Data Acquisition) system work. SCADA is a
computer-based program. It brings site information into the central operations center.
SCADA is a useful tool by providing monitoring information to be used for more
efficient plant operation. It also brings remote site alarms into the operations center,
which provides better control over plant problems.
12” pump installation. The 12 inch pump installed at the head-works of the plant in 2000
remains a valuable tool in preventing spills. In the event of high flows or maintenance
repairs, water can be removed to two abandoned secondary clarifiers. These clarifiers
were taken off-line in the early eighties after plant upgrades. They were originally used
for stabilized biosolids storage. The capacity was increased by extending a wall up from
where the weir overflows were when used as secondary clarifiers. This increased the
storage capacity of the two tanks to 750,000 gallons. After a dedicated biosolids tank
was constructed, the two abandoned tanks were dedicated to spill containment Once
stored, wastewater can be returned to the plant with an existing pump station. Some pipe
work has been added to this station and depending on conditions, water could be returned
as the tanks are filled. This further increases holding capacity or downtime, during high
flows or maintenance and repairs. In 2007, 2,040,313 gallons of wastewater were stored.
Since setup in 2000, 33,550,433 gallons of wastewater have been prevented from spilling.
At the average flow of 3.6 MGD in 2007, this would be 9.3 days of flow.
The wastewater plant is also equipped with emergency flood pumps. These pumps are
used in the event of high river levels, which prevent normal gravity flow out of the plant.
Without them, treated wastewater would have no way of exiting the plant and
consequently would flood the plant, causing extensive damage and long recovery. These
pumps are maintained and exercised on a regular basis to ensure proper operation for
times of urgency. This station is also equipped with local and remote SCADA high level
SCADA work continued in 2007. The area of emphasis was the secondary biological
treatment process. Pumps on/off and rpm status was added. One well level with
high/low level alarms was added. Clarivac on/off and fpm speed was added. Also, all
alarms (8 total) of the clarivac were added (i.e., motor overload and clutch fault). Also
added was the solids washout polymer control system. Transfer pump and tank mixer
on/off status were added. Polymer tank level with high/low alarms was added. And the
polymer chemical feed pump speed was added. Work also included improving the
monitoring computer located in a control room. Many graphs and trend charts were
added to further help with monitoring the status of plant site information. The SCADA
monitoring computer was also reconfigured to make it more users friendly. The RAM of
the computer was also upgraded to provide more memory.
The emergency generator is also used to curtail. The District is under contract with
Dominion Power. From May 16th through September 30th (summer curtailment) and
from December 1st through March 318t (winter curtailment), Dominion can request the
wastewater plant to supply its own power for parts of the day during peak demand.
These requests usually come on the hottest days of summer and the coldest days of
winter. Dominion can then send power that the District would normally use to other
places of need. Winter requests are usually from 6am to 11am (5 hours) and summer
from 2pm to 9pm (7 hours). The contract is limited. In the winter requests to curtail are
limited to 13 or 65 hours and summer 19 or 133 hours. In 2007 the wastewater plant was
called to run all 19 times during the summer curtailment. There were 3 winter calls. The
District does incur the cost of diesel fuel. However, the rate structure the wastewater
plant has because of the contract off sets this cost and provides electrical energy savings.
An added benefit of this program is that it provides a means to exercise the generator.
This keeps the generator in better running condition and exposes any potential problem.
It would be better to find out a problem during a curtailment than an actual power outage.
By having the generator under a contracted quarterly preventive maintenance program
hopefully problems will be minimized or eliminated.
Another means of spill control is with a back-up generator. The wastewater plant must
continue to run in the event of power interruptions from the power-supply company.
Power interruption can occur from equipment failure, road accidents, and weather events,
such as ice storms, electrical storms, tornadoes, and hurricanes. A 750 kilo-watt
generator is on site for events and can supply enough generated power to run the entire
plant. In 2007 power supply was not interrupted.
This flood pump station has a back-up pump valving and pipe work installed independent
of this station. In the event of catastrophic flood pump or flood pump control panel
failure; treated water will continue to be removed from the plant. The pump is capable of
treating 8.5 million gallons per day or about 4 million gallons more than the average daily
flow in 2007. Plant maximum rated capacity is 8.3 million gallons per day. In 2006 the
pump was covered to help keep it protected and in better working condition. Lighting
was provided for nighttime operation. Also, a battery charger was installed to keep the
pump ready for use. The pump is exercised regularly to ensure performance.
The biosolids land application program ran fairly well in 2007. In the required annual
report to North Carolina division of Water Quality (NCDWQ) and the Environmental
Protection Agency (EPA), there were no deficiencies or spills. However, there was one
violation. It occurred at the District’s farm. An error in flagging off a buffered zone led
to the problem. Normal buffer distance from a property line is 50 feet, but there is a three
acre area located within a 67.2 acre field that needed to be buffered due to the low lying
of the area and also due to a well location. A 15 foot wide strip of this buffered acreage,
including the well location, in approximately two acres received approximately 6500
gallons of biosoilds. This represents less than 1% of 754,000 gallons applied to the
correct areas of this field. The NC Division of Water Quality discovered the infraction
and issued the violation and assessed a $2000 penalty with a $387.82 investigative cost.
Although the District received the penalty, the contracted application company agreed to
pay the $2387.82 because of their error in flagging the required area. This was the first
application to this field ever and lack of knowledge of the field’s buffer zones was an
attributing factor. Because of the incident, additional training has been instituted along
with designated personnel to flag fields. Also, permanent boundary markers are being
considered. In 2007 there were 215 stabilization events at 12750 gallons per event. This
is 59 % of the days in a year. The wastewater plant has entered into agreement with area
farmers for the use of their land for biosolids application. The farmers in turn receive the
nutrient value, moisture content, soil remediation, and lime, which is a by-product of ph
control in the treatment process of the biosolids. If necessary, additional lime can be
applied. There are 3100 acres, consisting of 128 fields, available in Halifax,
Northampton, and Warren Counties. All acreage was inspected, approved, and permitted
by the State of North Carolina. Using EPA approved treatment processes, 2,749,000
gallons of stabilized biosolids were safely applied to area lands, consisting of 6 fields and
219 acres, for beneficial reuse. This included the use of four different farms. Cost of this
application process was approximately $98,000. Cost of treatment to stabilize solids is
separate. Land that grew fescue, rye, and wheat were applied to. The amount applied in
2007 is down nearly 19.5 % from the previous year. Charges for application are based on
gallons. In an attempt to save application costs, biosolids are thickened as much as can
possibly be handled. The removed water is returned to the treatment plant. Also, once
biosolids are placed in storage for land application, water is further separated. This water
along with environmental water (rain, snow, etc) is decanted and returned to the
treatment plant. In 2007, 681,444gallons was decanted, at savings of $16,968. Although
3100 acres of land is permitted and storage of 1,000,000 gallons is available, at times
application is difficult due to weather conditions, crop status, and crop rotation. Owning
land would provide an outlet for these times. In 2004, the District purchased a suitable
land application site. It is located in Northampton County where the District already has
farmer owned land permitted. The land has been developed for livestock (cow)
operation. The area has been split into two fields. One contains 41.8 acres of fescue and
the other contains 67.2 acres of bermuda. Both fields received their first application of
biosolids in 2007. Fescue was applied 429,000 gallons which is approximately 10,300
gallons per acre. Environmental Protection Agency (EPA) regulations allow up to 3
times more per acre on fescue (as determined by nitrogen and % solids content).
Bermuda was applied 754,000 gallons which is approximately 11,200 gallons per acre.
EPA regulations allow up to 3 times more per acre on Bermuda (as determined by
alarms. These alarms provide notification in the event of station failure. Enough
notification time is allowed to take remedial action before plant damage occurs. The
alarms are checked on a regular basis as well.
nitrogen and % solids content). Both grasses responded well to the applications. The
fields were intentionally split into these two types of grasses too provide for winter and
summer applications. Also this allows the cows to be moved off the field (the two fields
are separated by fence) which has been applied to for the EPA regulated 30 days.
In 2007, industrial users were re-issued permits. Two significant industrial user and 4
non-significant user permits were issued. From March 17 to April 11, 2007, the District
provided temporary services to Halifax County Public Utilities for the purpose of taking
wastewater effluent from their pretreatment facility. The pretreatment facility which
treats wastewater from a food processing facility, was unable to meet the effluent
standards outlined in their permit with the Town of Weldon, NC. In order to allow the
facility to be brought back into compliance status with their Weldon issued permit, the
District agreed to temporarily allow Halifax County to pump the discharge to the
collection system belonging to the District for subsequent treatment by the District
wastewater plant, while necessary steps were taken by Halifax County to bring the
facility back into compliance. The facility was brought back into compliance with their
Weldon permit and the pumping concluded.
The North Carolina Division of Water Quality performed its annual inspection of the
pretreatment program on April 26, 2007. A letter of April 27, 2007 was received
complementing the program on the organization, documentation, and time management
instituted within the program.
The pretreatment annual report (PAR) was submitted to the state pretreatment unit on
February 14, 2007. A letter, dated April 23, 2007, was received stating review of the
PAR indicates the report in good order and satisfied the requirements of the North
Carolina Pretreatment Program.
In March 2007, a permit renewal package was submitted by the District for the non­
discharge land application program. After the Division of Water Quality (D WQ) Aquifer
Protection Section’s preliminary review an additional items request letter was sent. The
list had 10 items associated with the buffers of certain land application areas. They
requested a response to these issues by July. Some of the 10 responses included the
following. One of the fields was sold and a new landowner agreement needed to be
submitted with new buffered property lines. One field had a home built on it with a well
addition. This addition required a different buffer zone. Several fields had ditches
indicated rather than streams. These streams required a revised buffer area. In all, all 10
items were addressed and returned to DWQ. DWQ reviewed and accepted all 10 item
changes and in September of 2007 issued a new permit to the District. It is valid through
August 2012.
Since purchasing the land investment improvements continued in 2007. Some of these
improvements are road improvements, weed spraying, annual rye over seeding, and soil
remedial potash application. Also, the permit renewal applied for in March of 2007 was
approved in September 2007. The new permit is valid through August of 2012.
Improvements were in excess of $11,500.
In 2007 the industrial pretreatment program had oversight of two significant industrial
users. One user has a categorical discharge pipe. Four non-significant industrial users
are permitted to send flow to the wastewater plant. Significant and non-significant status
is determined in part by the volume of flow discharged and the pollutants in the
discharge. The pollutants, carried by certain industrial wastes, determine the categorical
status of an industry. In 2007 there were no significant industrial users in significant
non-compliance; a status based on the number and types of violations of a permit. There
was one violation of a permit. There was one “failure to Notify”.
There were seven sewer blockages attributed to FOG in 2007. Two of those blockages
were attributed to restaurants and the other five were attributed to residential contributors.
The two restaurants have since modified their grease traps and management practices
regarding FOG. There were no Notices of Violation or civil penalties accessed or
collected in 2007. The Sanitary District began the process of revising the FOG ordinance
to clarify some of the variances available to food preparation facilities.
In 2006, the wastewater NPDES permit came up for renewal. North Carolina Division of
Water Quality requires specific information and data for analysis in structuring a new
permit The submittal package is due 180 days before permit expiration. All required
information was submitted in October 2006. In 2007 a draft permit was received in May
for District review and comment. This draft was made available to the public for 30 days
also. There were some minor errors that were discovered, such as typographical errors
and dates. Also there were several issues of concern and some clarifications noted. The
District notified DWQ of these issues. There was no public comment DWQ addressed
them and issued a finalized permit in June. It is effective until March 2012.
Another testing requirement of the NPDES permit is the annual priority pollutant analysis
(APPA). As indicated, it is an annual test that checks the effluent for conventional and
non-conventional compounds, total recoverable metals, volatile organic compounds,
acid-extractable compounds, and base-neutral compounds. These substances, if found in
sufficient quantity, could be harmful to the wastewater plant, receiving stream, and the
public. To date, no substances have been found in significant quantity to cause harm.
The test is done seasonally over the term of a five year NPDES permit.
The wastewater plant now has a general storm water permit It was received through an
application process as required by the North Carolina Division of Water Quality. A
requirement of this pennit is a written storm water management plan. The plan is used to
evaluate potential pollution sources and to select and implement appropriate methods to
A requirement of the wastewater plant through its NPDES permit is quarterly chronic
toxicity testing. The test involves using a predetermined amount of effluent along with a
macroscopic organism. Ceriodaphnia are placed in the effluent and must survive and
reproduce for a specific length of time. Results of the test are either pass or fail. A pass
indicates the absence of substances in the effluent which may be harmful or threaten
aquatic life. The wastewater plant has been required to test for chronic toxicity since
April of 1993. To date only one test has received a fail result. This occurred in July
2001.
In 2007, all initial inspections of restaurants were completed and recommendations for
necessary improvements were compiled. Regular inspections of the 66 restaurants in the
Sanitary District’s Fats, Oils, and Grease (FOG) database were also begun in 2007.
There were ten Notices to Correct sent out that required existing restaurants to install or
modify their grease traps and one restaurant was granted a deadline extension. Thirteen
additional Notices to Correct have been sent out with deadlines set in 2008. Five other
Notices to Correct were sent out that did not require equipment installation and were
addressed immediately. One restaurant requested a variance to extend the cleaning
frequency schedule of their trap and a variance study was begun.
The Sanitary District’s informational slide on the Roanoke Rapids public information
channel was updated. FOG informational pamphlets were inserted in the annual
consumer confidence reports.
In 2005, the Sanitary District adopted a Fat, Oil, and Grease (FOG) ordinance. Its
adoption was a direct result of the NPDES permit process which required the
implementation of measures to address sanitary sewer overflows (spills). Fats, oils, and
grease (FOG), if placed in the sanitary collection system can over a period of time build
up and clog pipes causing spills.
prevent or control the discharge of pollutants to stormwater runoff. As a part of the plan,
semiannual preventative maintenance evaluations and semiannual inspections of site
runoff areas are required.
The Division of Water Quality did not conduct their annual comprehensive evaluation
site inspection in 2007. However, they did contact the District and asked if voluntary
participation in a pilot program would be considered. The District agreed. The program
is Basin-wide Information Management System (BIMS). In the works for years, the
BIMS program is an electronic means for submission of discharge monitoring reports.
These reports are a monthly requirement to the Division of Water Quality (DWQ)
reporting the permit data points of the wastewater treatment facility. For years these
reports have been prepared on paper and mailed to DWQ. This program, if successful,
will eliminate the “paper trail” and mailing of the report process and speed up and
streamline the method of data reporting.
In July, an inspector for the WEF visited the wastewater plant for a tour of the plant and
to make an evaluation. A few months later, it was announced that the Roanoke Rapids
Wastewater Plant had won the award. Two staff personal traveled to Charlotte for the
annual WEF state convention in December to be presented the plaque in recognition of
this award. It was a great honor to be recognized by a group of peers in the industry and
be bestowed with this award. It took the steadfast support of administration and board
with the financing and direction to make this happen. It took the dedication and
commitment of the employees as well. It was a team effort and it is a team award.
The safety program within the District is very active and assertive in its approach to the
protection of the employees and surrounding citizens. The program consists of a safety
officer, safety committee, incident/accident committee and appeals committee. The
safety officer sets up the monthly safety meetings, coordinates the activities of the safety
committee, keeps up with safety regulations, and many other various safety activities.
The safety committee prepares safety policy programs and updates current ones. They
also do site inspections and produce potential hazard punch lists. The safety committee
and safety officer also keeps up with and prepares for updating regulations and
integrating new regulations of OSHA. The incident/accident committee reviews all
potential accidents and accidents. The appeal committee follows up the safety committee
recommendation at the request of an employee. The attempt is to minimize the
seriousness of an accident and ultimately prevent accidents. As a result of the awareness
and training from the safety program, there were no loss work days in 2007. There were
also no reportable incidents or accidents.
In 2007, the wastewater plant was nominated for the Burke Safety Award. The
nomination was one of many across the state. This award comes from the Water
Environment Federation (WEF). The WEF is a not for profit technical and educational
organization who’s mission is the preserving and enhancing the global water
environment. The Burke Award recognizes active and effective safety programs in
municipal and industrial wastewater facilities. The Federation” Member Association
Safety Award is presented to selected associations in recognition of their association
safety program, use of safety aids to promote safety programs, and the success of those
programs. The purpose of the award is: 1. Promote the establishment and
implementation of organized safety programs in local wastewater works and collection
systems, 2. Encourage Member Associations to conduct programs to promote safety in
local wastewater works and collection systems, and 3. Encourage participation in the
collection of injury statistics from individual wastewater works and collection systems,
and to encourage Member Associations’ use of this data.
After years of preparation, the District called OSHA and requested consultative
inspections to help maintain a safe work place for its employees. After a series of
inspections from OSHA safety and health officers, the District met all requirements of
compliance by correcting all hazards identified during consultative visits and by
developing an occupational safety and health management system. Once met, the
Permit limit violation
C.S.: None1.
2.WWTP: None
Monitoring and Reporting Violations
2007 Sanitary Sewers Overflows (SSO)
2. WWTP: N/A
Bypass of Treatment Facility
C.S.: N/A1.
2.
B. By month, list of the number and type of any violations of permit conditions,
environmental regulations, or environmental laws, including (but not limited to):
1.
2.
District was eligible for the SHARP (Safety and Health Achievement Recognition
Program) Award. This year marked the sixth straight year the wastewater plant was in
the SHARP Program. With this achievement, NCDOL (North Carolina Department of
Labor) grants exemption from programmed OSHA compliance inspections for a specified
period of time. It is a compliment to the dedication and continued hard work of the
administration and staff. It serves also as a testament to the commitment of the company
for the protection of the employees and surrounding community.
C.S.: None
WWTP: None
1. C.S.: There were 11 reportable SSO in 2006.
1. Manhole #185 in US 158 Estimated at 200 gals.
2. 400 blk. Of Marshall St. and Carolina St. Estimated at 600 gals.
3. Greenbriar Pump Station at end of Hall St Estimated at 300 gals.
The District has an emergency response team (ERT). In 2007 the ERT went through
some restructuring. The entry teams were reorganized. The entry assistants were
reorganized. The vitals checker and time keeper positions were assigned back-ups. The
van organization, loading and unloading positions, were assigned back-ups and a new
team leader was designated. Because the wastewater plant is the only location with
chlorine and sulfur dioxide, now, the response van is now located here. This should help
with response time in the event of an emergency. Also relocated to the plant is the
chlorine gas detector. It has been assigned a caretaker who also does monthly
calibrations. The formation of the team arose from chemicals, chlorine, and sulfur
dioxide stored on site. Another factor for its formation was the lack of any other agency
in the immediate area to deal with these chemicals. The team meets and has drill
practices regularly. The team is fully equipped and trained to handle emergencies which
may arise from the use of chlorine and sulfiir dioxide.
WWTP:
There was one reportable bypass of the treatment facility in which more 1000 gallons of
wastewater reached surface waters in 2007. It occurred on August 24th during a
construction project. A process control valve was being installed. During the
installation, influent flow had to be diverted into a storage tank. Once the process was
“dried” up and cut into, the project had to have influent flow diverted until a new valve
C. Description of any known environmental impact of violations.
D.Description of corrective measures taken to address violations or deficiencies.
In 2007, graveled walkways and observation decks were added to three areas required to
be monitored. Now all five observation areas of plant stormwater runoff can be easily
accessed.
Also, as part of the SPPP, dedicated wash down areas have been set up. These areas
allow wash down of equipment where the wastewater rinse is contained in the plant. In
instances where petroleum wash down is necessary, there is a parts wash solvent sink
with containment. The containment is recycled through a contracted company. If larger
parts need petroleum wash down, a local company has been contacted that can handle
these larger items through a recovery unit A fee is paid to handle the cost of the solvent
recovery and recycling.
There has been a storm drain management program at the plant that is now incorporated
into the SPPP. Storm drains are gated and remain closed in case of on-site spills. The
spills would be contained or minimized from reaching surface water. The contained
spills are then returned to the plant The gates need to be opened in the event of rains to
allow normal rain water to drain from the plant. In 2007 a storm drain gate use log book
was developed. It will be helpful as a reminder to return storm drain gates to the closed
position once rain has ended.
Some of the work done to prevent problems is the identification of potential spill areas.
Once identified, arrangements are made to stop or minimize and contain.
was installed. During the course of the project, it was discovered that a valve located
within the flow diversion box was not seated properly. The new process valve was
installed quickly as possible. However, during this project, approximately 9000 gallons
of wastewater was spilled. The spill was reported to the Division of Water Quality
(DWQ) within 24 hours, by phone, and followed with a written report within 5 days as
required by DWQ. As also required a press release was issued.
The Stormwater Pollution Prevention Plan (SPPP), implemented in 2006, will be a
valuable tool in identifying deficiencies. It incorporates annual awareness and training
not only to all plant personnel. The plan allows for scheduled identification of
deficiencies before they become problems.
1. C.S.:
Preventive maintenance cleaning with Jet Vac, and a rot cutter which is attached to the
Jet Vac hose for cutting roots and using TV camera. Manhole repairs and spot line
repairs. We also used BioNomics to clean and TV Outfall G from Roanoke River Outfall
to the wastewater treatment plant. Plus the Roanoke Rapids Sanitary Dist. Crews cleaned
& TV’ed 13 miles of sewerlines. BioNomics inspected M/H’s, TV’ed, and cleaned 2
miles. Plus L&J Contractors smoked, TV’ed, cleaned, and did some Pipe Bursting &
Point Repairs a total of 7 miles. MJ Price Construction cut Chockyotte Creek Outfall and
Laterals which was 8 miles, making it a total of 30 miles between all 4 companies.
2. WWTP:
The WWTP is very aggressive in reacting to violations and identifying potential
deficiencies. Once identified, plans are made to upgrade or replace potential deficiencies,
which may result in violation. Modifying operations, training operators, laboratory
training, improved equipment, maintenance inventory parts and equipment and raising
awareness is also an on-going and continuous process.
1. C.S.: None
2. WWTP: None
- 15-
The disinfection system is on a contracted semiannual preventative maintenance
program. It is an attempt to ensure that the release of hazardous chemicals, chlorine and
sulfur dioxide, are prevented. Also, the automatic tank valve closures are sent off for
repairs and recertification annually. The batteries that operate these valves are replaced
regularly to ensure their proper operation in the event of a leak.
During high flows or some maintenance repairs, influent flow can be diverted to
equalization storage tank. Once flows lower or repairs are complete, the stored water is
returned to the plant for treatment. The return pipe was above ground rubber hose and
PVC. This was a risky set up. A tear or break could have easily occurred and a spill
could have been inevitable. In 2007 this pipe was replaced with underground metal pipe.
There are various alarms throughout the plant site. However, if they malfunction they are
of no value. These alanns are lights with horn or sirens. Some are station (remote) only.
However, many of the alarms are also on the SCADA system located in the operations
building control room. Also, to make these alarms more audible, the speaker system was
expanded into other areas of the operations building. In an attempt to keep functioning
alarms, they are tested on a regular basis. As more alarms are required or added, they are
added to the testing list.
Equipment status indicator lights can be a very useful tool for operations. The harsh
environment at the wastewater plant makes maintaining functioning lights difficult. To
remedy this, new weather proof light sockets are being installed. Also, the lights have
changed too. LED lights are now installed. They are more dependable, can be seen
better in daylight, and last longer.
The plant generator is capable of powering the entire plant in the event of a power loss.
Without it, spills would occur. It is on a contracted quarterly preventative maintenance
program. It is also exercised monthly by plant staff. And, the curtailment program with
the main power supply company assures further testing and exercise of the generator.
A polymer feed pump station remains on line to help with solids washout at times of high
flows. In 2007, this system was added to the SCADA monitoring program to give better
control of this system. In addition, operational strategies have been put in place to
minimize solids wash out at times of high flow. And as described in performance section
“H”, a 12” pump is in place to retain flows that might otherwise reach surface water.
This setup continues to be a valuable tool each year in preventing spills. Retaining high
flows in equalization tanks helps with solids wash out also.
Identifying and eliminating inflow and infiltration (I&I) is an on-going and difficult task.
It is important to stop or minimize to take unnecessary flows off of the treatment plant.
However, it is also important to address because excess I&I can “dilute” incoming waste.
Diluted wastewater makes it more difficult to meet percent removal requirements (85%)
of the plants permit. In 2007, more areas were identified and addressed to help resolve
this problem.
A valve exercise program is now employed. It keeps valves in good working order. In
the event of routine maintenance, equipment problems, or emergencies, valves used to
address these issues are in a state of readiness. As valves are repaired or replaced, they
are added to the exercise list.
The Fat, Oil, and Grease (FOG) program, which began as a committee, advanced to an
ordinance, and now has a full-time employee to administer the program. The goal is to
prevent FOG from entering the collection system causing blockage problems resulting in
spills. The wastewater plant will benefit by having less FOG to handle and chemically
treat. During implementation of the Fog ordinance, oversights and deficiencies were
observed and noted. Work is under way to make revisions. Once completed, the
ordinance will be resubmitted for adoption by the Board of Commissioners.
III.NOTIFICATION
IV.CERTIFICATION
- 16-
Reduce
Recycle
Satisfy
Develop
A. I certify under penalty of law that this report is complete and accurate to the best of my
knowledge. 1 fiirther certify that this report has been made available to the users of the
named system and that those users have been notified of its availability.
R. Danieley Brown, PE
Chief Executive Officer
Date
Now return of stored water into the plant is much safer and much less likely to cause a
spill.
During a construction project in 2007, influent was diverted to equalization storage tanks.
During the process, it was discovered that a valve was not seated properly and some
spillage occurred. A pipe plug was installed down stream to prevent future spills. Plans
are under study to replace the faulty valve. The wastewater plant uses chlorine for
effluent disinfection. It uses sulfur dioxide to remove chlorine after disinfection has been
accomplished. Both chemicals are very effective; however, both are also very toxic. In
2007, plans were implemented to switch over to safer chemicals. Sodium hypochlorite
will replace chlorine and sodium bisulfate will replace sulfur dioxide. As well as safer,
these chemicals are effective as well. Drawings and drawing review has begun.
A. A condensed, summarized version of this report will accompany the annual water report
which will be distributed to the users and customers of the Roanoke Rapids Sanitary
District via mail. The full report will be available at the main office upon request.

___Halifax County Public Utilities
P.O. Box 70
Roanoke Rapids Sanitary District WWTP
£
£

WWTP Address:
135 Aqueduct Road
City. State, Zip
Weldon, NC 27890
&
£ 8
Roanoke Rapids Sanitaiy District
Hereafter in this permit referred to as the
Control Authority
2 o2
S u_
■S
£
a
I
£

NPDES Number:
NC0024201
4*
I 4tr
TIUP QQ3
TJUP Number
|^537306<
CO
— CD
CD
£
a
Q
bance with the provisions of North Carolina General Statute 143-215.1 any applicable
categorical pretreatment regulations, all other lawful standards and regulations
ated and adopted by the North Carolina Environmental Management Commission, and
frol Authority Sewer Use Regulations. The following Industry, hereafter referred to by
as the permittee:
Effective dare, this permit and the authorization to discharge
shall become elTectrvc at midnight on this date:.
March 31,2007 ______
Expiration date, this permit and the authorization to discharge
shall expire at midnight on this date;
April 15,2007
TEMPORARY PERMIT
(Non-SIU Permit)
Temporary Industrial User Pretreatment Permit (TIUP)
To Discharge Wastewater Under the
Industrial Pretreatment Program
in accordance with effluent limitations, monitoring requirements, and all other conditions set
forth in Parts I, II, and III of this Industrial User Pretreatment Permit (IUP).
i Halifax, NC 27839
is hereby authorized to discharge wastewater from the facility located at the above listed address
into the sanitary sewer collection system and the wastewater treatment facility of the Control
Authority listed below:
5
1
—
i
6
U
03/30/2007 13:52
A-
PAGE 01/15RP SAN IDI STR I CT
13:52 02/15PAGE
Page: 2
^|537^^4
R O. 8R0WN
CEO '
Roanoke Rapids Sanitary District
P. O. Box 308
Roanoke Rapids. NC 27870
919/537-9137
03/30/2007 RR SANITjj^DI^ICT
Date signed
, 03/30/2007 13:52 |^37^4 DISTRICT 03/15PAGE
IUP, PARTI, OUTLINE:
A.IUP Basic Information:
B.
Date s:

Permit IssuedMarch 17, 2007
I Modified expiration date and pH limitsMarch 30.2007
-
A. )
B. )
C. )
D. )
E. )
F. )
G. )

TIUP # = > 003
Page 3
JUP Expiration date:
March 31, 2007

TIUP, PARTI,
Industrial User (IU) Specific Conditions
Receiving POTW name:
Roanoke Rapids Sanitary District WWTP
IUP Name: ' "
Halifax County Public Utilities
IUP Effective date :
March 17,2007
TUP Basic Information
TUP Modification History
Authorization Statement
Description of Discharges
Schematic
Effluent Limits & Monitoring Requirements
Definitions & Limit page(s) notes

A Complete Permit
modification History is
|| required.
RR SANIT^^
IUP Modification History:
I Reason for & Description of modifications.
| POTW NPDES # :
NC0024201
TIUP Number:
TIUP 003
Pipe Numbers, list all regulated
. pipes:
J__N/A_____
IUP 40 CPR # (jf applicable), or
i N/A:
I N/A
^^37^4
C.)Authorization Statement:
!■)
2.)
3-)
Pipe #, Description of Discharge:
J
TRIP # = >003
Page 4
TIUP, PARTI,
Industrial User (IU) Specific Conditions
Discharge of aJJ process wastewater from the pretreatroent facility,
including equipment wash down and floor drains in process area.
*Floor drain in laboratory area discharges to domestic waste line.
IU T reatm ent Units
Influent parshall flume with automated refrigerated composite sampler,
drum screen, flow equalization basin, dissolved air floatation (DAF) basin,
roll-off container for DAF soilds, flocculation tubes, pH adjustment,
coagulant feed, anionic and cationic flocculent feed, (“polymers”) ammonia
feed, Bio-tower, final clarifier, effluent parshall flume with automated
refrigerated composite sampler.
The Permittee is hereby authorized to, if required by the Control Authority, and after
receiving Authorization to Construct (A to C) from the Control Authority, construct
and operate additional pretreatment units as needed to meet final effluent limitations.
Peninittee is heret>y authorized to discharge wastewater in accordance with the
effluent limitations, monitoring requirements, and all other conditions set forth in this
Industrial User Pretreatment Permit (TUP) into the sewer collection system and
wastewater treatment facility of the Control Authority.
The Permittee is hereby authorized to continue operation of and discharge wastewater
from the following treatment or pretreatment facilities. These facilities must
correspond to the treatment units listed on both the application and inspection forms.
PAGE 04/15. 03/30/2007 13:52
» 1
PR SAN IDI STR I CT
D.) Description of IUP Discharge(s):
I. Describe the discharge(s) from all regulated pipes.
03/30/2007 13:52 05/15^^537^4 PAGE1
E.) Schematic and Monitoring Locations:
^■7 /
I
S
TIUP # = > Q03
Page 5
TIUP, PARTI,
Industrial User (IU) Specific Conditions
g..\
m ioa
H’Hp
____'V-V" ' \ \t V ■
'■
J V\
i i
I
PR SANIT^^DISTRICT
11
8'
. Mi
\ Pl
\ ’
■. w
r-s.
'x/'\sW
\
Z... •, \\
Y fL
/ \ o ,
■ \W
io
X
Monitoring Frequency
Max by Indusliy by PO'IW
10Q.00 daily daily
Concentration I .iinits
Units
ld
q
Monthly
Avg
Required
Laboratory
Detection
Limife
co
LdCD<1CL
TIUP, Part I, Section F:
Effluent Limits and Monitoring Requirements:
Q
S)
CM \
CO
co
K) k
0.175
2000,M
2000,00
40
6-10
Mass-Based Limits___
Units
daily
daily
daily
daily
0.01 mg/i
0.002 mg/|
0.005 mgd
0.002 nig/]
1.0 mg/i
0.01 mg/1
0.0002 nig/1
0.1 mg/1
0.01 mg/i
0.01 rr.g/1
0.01 mg/1
2,0 mg/t
1.0 mg/1
0003
OOl
N/A
MGD
_rng/l
mg/1
Deg.€
Std. Units]
continuous
dail;1
daily­
daily
daily
Sample
Collection
Method
(C or
Per Part ni(3)a), p. 14
________C
c______
________G_________
G
C
c
c
c
G
C
C
c
c
c
c
How_____
CROP
TSS
temperature
pH**
Ronaoke Rapids Sanitary District WWTP
___________NC0024201____________
3/3!/2Q[l7
4/15/2007
MGD
Jbs/day
Ibs/day
Deg- C
Std. Units
Ibs/day
Ibs/day
Ibs/day
Ibs/day
Ibs/day
Ibs/day
Ibs/day
Ibs/day
Ibs/day
Ibs/day
Ibs/dav
Receiving POTW name =>
Recehing POTW NPDES #
EfTeciive date for these Limits =>
Expiration date for these Lunns =>
Daily
Max
!U name => Halifax County Public Utilities
TRIP # =o
Pipe H =>
40CFR#=>________
if not applicable put N/A
O
VENTION AL
q PARAMETERS
*
3.
4_
5.
The permittee may discharge from this specific pipe
number according to these specific dates, effluent
limits, and monitoriim reuuirements.
THE I INfl 1S ON THIS PAGE ARE, (Check qiu; below):
LIMITS for ENTIRE- permit period =>
IN 1'FiRIM Limits for period /•' 1 =>
INTERIM Limits for period A 2 =>
FINAL Limits Page =>
* Daily sliall mean each day of discharge.
***■ C-Composiite sample.11 G-Grab Sample
A
7^_
JL
]O_
IL.
12_
11.
xr 14.
*Daily I Monthly
Avg,
Z <1 CD
(X CL
2*1 ER PARAMETERS. Please list alphabetically
Arsenic
Cadmium
Chromiirni
I.'op per
FOG
Lead__
Mercury
Molybdnum
Nickel
|Selcnimn
r^^yfZinc
m Tri V
mg/1
mg/i
mg/f _
mg/1
mg/J
mg/i
mg/1
mg/1
mg/i
mg/1
mg/1
____
♦* Upon discharge on 3/17/2007, pH shall be measured every four houn.(4 pm, 8pm, and 12 am) at die first manhole
doM^trcain of_the effluent flume and called in to the RRSD wastewater treatment plant willtin 30 mmutes of measurement,
■rem J/I8/2IH) i to 3/31/2007, ph shall be measured every four hours of discharge, at the first manhole downstream of the effluent flume
mid reported to the wastewater treatment plant within 30 miumes of measurement
pH shall be measured continuously at the Wallace Fork pump station immediately alter installation of replacement probe.
(See next section, TRJP, PART I, Section G.)
for Definitions and Limit Page(s) notes:
T1UP, PAR.TL Page: 6
1 03/3^/2007 13:52 |^37^4 RR SANIL
1.
2.
3.
4.
5.
milliliters
hours
hours
samples
HUP # = > 003
Page 7
I^DI^ICT
Daily Monitoring Frequency
Daily Monitoring Frequency as specified in this IUP shall mean each working
G.) Definitions and Limit Page(s) notes:
".t*”in c“”' u“ -
Composite Sample:
Unless defined differently below, a composite sample for the monitoring
requirements of this TUP, is defined as the automatic or manual collection of one
grab sample of constant volume, not less than 50 ml, collected every hour during
the entire discharge period on the sampling day. Sampling day shall be a typical
production, and discharge day.
Composite Sample, alternative definition, N/A for this IUP:
A composite sample for the monitoring requirements of this TUP is the same as
described above unless specifically defined below as the automatic or manual
collection of constant volume and constant time grab samples collected and
composited according to the following criteria:
specific volume of each grab sample = P
specific time interval between samples =
total duration of sample collection period =
total number of grab samples to be composited
Instantaneous measurement
An Instantaneous measurement for the monitoring requirements of this IUP is
defined as a single reading, observation, or measurement.
PAGE 07/15
Grab Sample
Grab sample for the monitoring requirements of this IUP, is defined as a single
"dip and take" sample collected at a representative point in the discharge stream.
^^537^4 RR SANITi DISTRICTt
a.)
b.)
TIUP # - > 003
Page 8
TIUP, PARTI,
_Industrial User (IU) Specific Con di ti ons
the POTW if the POTW’s submission for its pretreatment program has been
approved and that approval has not been subsequently withdrawn, or;
the approval authority if the submission has not been approved or the Division has
subsequently withdrawn pretreatment program approval.
PAGE 08/1503/30/2007 13:52 » *
G.) Definitions and Limit Page footnotes: (continued)
6. Control Authority
, 03/30/2007 1 t «13: 52 09/15RR SANIT PAGE
Outline of PART IT,
k
2.
b.)
3.
Federal and/or State Laws
Penalties
Need to Halt or Reduce
Transferability
Property Rights
Severability
Modification, Revocation, Tennination
Reapplication
Dilution Prohibition
Reports of Changed Conditions
Construction of pretreatment facilities
Reopener
Categorical Reopencr
General Prohibitive Standards
Reports of Potential Problems
TIUP #• = > 003
Page 9
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
Representative Sampling
Reporting
Test Procedures
Additional Monitoring by Permittee
Duty to comply
Duty to Mitigate
Facilities Operation, Bypass
Removed substances
Upset Conditions
Right of Entry
Availability of Records
Duty to provide information
Signatory Requirements
Toxic Pollutants
Civil and Criminal Liability
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
accordance with the techniques
1 otherwise in the monitoring
PART II
General Conditions
IndustrmlJ^r^r^<Wmei^ei7m^(IUP)
Reporting
a.)
Test Procedures
Test procedures for the analysis of pollutants shall be performed in
prescribed in 40 CFR part 136 and amendments thereto unless specified
conditions of this permit.
Monitoring results obtained by the permittee shall be reported. The report of those results shall be
postmarked no later than the twentieth day of the month following the month in which the samples
were taken. If no discharge occurs during a reporting period (herein defined as each calendar
Tnu in.wh,ch a samPlmg event was to have occurred, a form with the phrase "no discharee"
shall be submitted. Copies of these and all other reports required herein shall be submitted to the
Control Authority at the address on the permit cover page.
If the sampling performed by the permittee indicates a violation, the permittee shall notify the
Control Authority within 24 hours of becoming aware of the violation. The permittee shall also
repeat the sampling and analysis and submit the results of the repeat analysis to the Control
Authority within 30 days after becoming aware of the violation.
Representative Sampling
Samples and measurements taken as required herein shall be representative of the volume and nature of the
monitored discharge. All samples shall be taken at the monitoring points specified in this permit and unless
otherwise specified, before the effluent joins or is diluted by any other wastestream, body of water, or
Authority' Mon’toring points s*1311 not be changed without notification to, and approval by. the Control
4.
5.
6.
7.
8.
9.
TRIP # = >003
Page 10
^|537^4
PART II
General Conditions
Ig^gllMJjgerPretreatment Permit (IUP)
RR SANIT^^DI^ICT
Removed Substances
Solids, sludges, filter backwash, or other pollutants removed in the course of treatment or control of
wastewaters shall be disposed of in a manner such as to prevent any pollutants from such materials from
entering the sewer system. The permittee is responsible for assuring its compliance with any requirements
regarding the generation, treatment storage, and/or disposal of "Hazardous waste" as defined under the
Federal Resource Conservation and Recovciy Act
Facilities Operation, Bypass
The permittee shall at all times maintain in good working order and operate as efficiently as possible, all
control facilities or systems installed or used by the permittee to achieve compliance with the terms and
conditions of this permit. Bypass of treatment facilities is prohibited except when approved in advance by
the Control Authority. Bypass approval shall be given only when such bypass is in compliance with 40
Upset Conditions
An upset means an exceptional incident in which there is an unintentional and temporary noncompliance
with the effluent limitations of this permit because of factors beyond the reasonable control of the permittee
An upset does not include noncompliance to the extent caused by operational error, improperly designed or
inadequate treatment facilities, lack of preventative maintenance, or careless or improper operations.
An upset may constitute an affirmative defense for action brought for the noncompliance. The permittee
has the burden of proof to provide evidence and demonstrate that none of the factors specifically listed
above were responsible for the noncompliance.
PAGE 10/1503/30/2007 13:52
n 1 *
Additional Monitoring by Permittee
If the permittee monitors any pollutant at the location(s) designated herein more frequently than required by
this permit, using approved analytical methods as specified above, the results of such monitoring shall be
submitted to the Control Authority, The Control Authority may require more frequent monitoring or the
monitoring of other pollutants not required in this permit by written notification.
Duty to Comply
The permittee must comply with all conditions of this permit Any permit noncompliance constitutes a
violation of the Control Authority Sewer Use Regulations and may constitute a violation of state and / or
federal regulations. Therefore any permit noncompliance is grounds for possible enforcement action.
Duty to Mitigate - Prevention of Adverse Impact
The permittee shall take all reasonable steps to minimize or prevent any discharge in violation of tills permit
which has a reasonable likelihood of adversely affecting human health, the POTW, the waters receiving the
POTW’s discharge, or the environment.
n ,03/3,0/2007 13:52 ^|537^4
1.
2.
11.
15.
TIUP # = > 003
Page 11
PART II
General Conditions
IndustriaTUser Pretreatment Permit (IUP)
RR SANIT^^DI^RICT
or criminal penalties for
13. Signatory Requirements
All reports or information submitted pursuant to the requirements of this permit must be signed and certified
by a ranking official or duly authorized agent of the permittee.
14. Toxic Pollutants
toxic effluent Standard or prohibition (including any schedule of compliance specified in such effluent
St, Vh IS eStaWiEllt:d under Secti0" M7W of Fed<™' Clean Water Act for a toxic
pollutant which is present tn the discharge and such standard or prohibition is more stringent than any
bmitafon for such pollutant m this pennit, this permit may be revised or modified in accordance with the
toxic effluent standard or prohibition and the permittee so notified.
Civil and Criminal Liability
Nothing in this permit shall be construed to relieve the permittee from civil
noncompliance.
10. Right of Entry
The permittee shall allow the staff of the State of North Carolina Department of Environment and Natural
Resources. Division of Environmental Management, the Regional Administrator of the Environmental
credeX genCy’ and/°r rePrc^^tivc9, upon the presentation of
12. Duty to Provide Information
The penninee shall furnish to the Superintendent or his/her designees, within a reasonable time any
information which the Director, hisfter designee, or the Division of Environmental Management may
request to determme whether cause exists for modifying, revoking and reissuing, or terminating this permit
or to determine compnance with this permit. The permittee shall also furnish, upon request, copies of
records required to be kept by this permit. 4 p
PAGE 11/15
To enter upon the permittee's premises where a real or potential discharge is located or in which
records are required to be kept under the terms and conditions of this permit; and
At reasonable times to have access to and copy records required to be kept under the terms and
conditions of tins permit; to inspect any monitoring equipment or monitoring method required in
this permit; and to sample any discharge of pollutants.
Availability of Records and Reports
The permittee shall retain records of all monitoring information, including all calibration and maintenance
records as well as copies of reports and information used to complete the application for this permit for at
east three years. All records that pertain to matters that are subject to any type of enforcement action shall
be retained and preserved by the permittee until all enforcement activities have concluded and ail periods of
limitation with respect to any and all appeals have expired.
Except for data determined to be confidential under the Control Authority Sewer Use Regulations and state
and federal pretreatment regulations, al) reports prepared in accordance with terms of this permit shall be
availab e for public mspeetton at the Control Authority. As required by the Sewer Use Regulations and
state rules effluent data shall not be considered confidential.
necessary to halt or
TIUP#->003
Page 12
^^537^4
PART II
General Conditions
In^trial^ejJPretreatment Permit (IUP)
RR SANIT^^DI^ICT
17. Penalties
The Sewer Use Ordinance of the Control Authority and’ ocw7r U5e,ura,nance or the Control Authority and state law (NCOS 143-215,6A) provides that any
such'riol'atiori0 3168 3 C°ndlllOn 'S SUbjCCt t0 a civil pcnalty no110 exceed £25,000 dollars per day of
16. Federal and/or State Laws
Nothing in this permit shall be construed to preclude the institution of any leKa] action or relieve the
aXs“ XX"1’''"' ,iabi,iti“‘ " PCna'tieS “ 3ny appliCable Fc'iCral
Under state law, (NCOS 143-215.6B), under certain circumstances it is a crime to violate terms, conditions
—ab
under this permit, including momtonng reports or reports of compliance or noncompliance. These crimes
are enforced at the prosecutorial discretion of the local District Attorney.
18. Need to Halt or Reduce not a Defense
It shall not be a defense for a permittee in an enforcement action that it would have been
reduce the permitted activity to maintain compliance with the conditions of the permit.
19. Transferability
This permit shall not be reassigned or transferred or sold to a new owner, new user, different premises or a
new or changed operation without approval of the Control Authority.
20. Property Rights
This permit does not convey any property rights in either real or personal property, or any exclusive
prmleges, nor does it authorize any injury to private property or any invasion of personal rights, nor any
infringement of Federal, State or local laws or regulations.
21. Severability
th'S P01™'1 scvcrab,e and> if any Provision of this permit or the application of any
provtsjon of this permit to any circumstance is held invalid, the application of such provision to other
circumstances and the remainder of this permit shall not be affected thereby.
22. Permit Modification, Revocation, Termination
This permit may be modified, revoked and reissued or terminated with cause in accordance to the
requirements of the Control Authority Sewer Use Regulations and North Carolina General Statute or
implementing regulations. owlulc or
03/30/2007 13:52 PAGE 12/15
23. Re-Application for Pennit Renewal
its ex^imiordate^5150"5'610 flI'ng applicatlOn for rcissuance of this permit at least 180 days prior to
^3/3.0/2007 13:52
2.)
TIUP # - > 003
Page 13
RR SAN I DIRECT
planned significant changes to the
or volume of its wastewater at least
27. Reopener
The permittee shall be modified or. alternatively, revoked and reissued to comply with any applicable
effluen standard or Imrtatton for the control of any pollutant shown to contribute to toxicity ofthXwTP
effluent or any pollutant that is otherwise limited by the POTW discharge permit. The permit as modified
regul’Xs theneapX™h a'S0 reqUirCn,e,,re °f °r Federal P"*™
29. General Prohibitive Standards
general proh,bi,ivc d'scharge standards in 40 CFR W “■’(b) of
30. Reports of Potential Problems
moblZm XhaSn™ by,te'ephrae Contro1 immediately of all discharges that could cause
p oblema to the POTW including any slug loadings as defined by 40 CFR 403.5(b). If the nemiittep
expenences such a discharge, they shall inform the Control Authority immediately upon the first awareness
T*! of th.eJ,scharBe’ Notification shall include location of the discharge, type of waste
renAwTt,onJ^d v^e ,f and corrective actions taken by the permittee. A writt^ follow'-up
dZ uXrx ty c“ s Aufl’ori,y Mimicipa",y by fte p“
PART II
General Conditions
----------------Industrial User Pretreatment Permit (U P)
24. Dilution Prohibition -----------------
^h^iTSha" n°?incrcase USe Of potab,e °r P™*® water or ™ “y othCT w attempt to dilute the
limhXXnXin«5* ,0 a0WeVe
25. Reports of Changed conditions
The permittee shall give notice to the Control Authority of anv
permittee's operations or system which might alter the nature, quality.
90 days before the change.
PAGE 13/15
26. Construction
28. Categorical Reopener
This permit shall be modified, or alternatively, revoked and reissued, to comply with any applicable effluent
standard or limitation issued or approved under Sections 302(b)(2)(C) and (D), 304(b)(2X^id 307(a)(2) of
the Clean Water Act, if the effluent standard or limitation so issued or approved:
1.) contains different conditions or is otherwise more stringent than any effluent limitation in •
this permit; or
controls any pollutant not limited in this permit.
m n’°difiCd reiS5UCd ™der thi5 paraerap', sha" aIso contein “y other virement, of the Act
lucn appucaoie.
^3/^0/2007 13:52 ^|537^4
1.Slug/Spill Control Plan
2.
3.
TIUP # = > 003
Page 14
Flow Measurement Requirements
a. Measurement Method
PART III,
Special Conditions
Industrial User Pretreatment Permit (TUP)
RR SANIT^^DI^KICT
Ss1 X dcv,“!;nd ™hods w
Device, instailed sMI be a n™ n m01’i,°redless .ban 10% tTO di.hsrgc raKS thro„^;.™ v“ ’ m“taUm °f
Deviation., due to foam shall be expired ip the monthly reports and correetive actions taken as needed.
calibrated a minimum of once tier six months MnHifi™/ u <1 Ultrasonic Flow Meter. The meters shall be Control Authoritv poor to T“ T6™8 K|uipmenl 5t"1" »■'
notified within 24 hours. ’ d measurement device finis, the Control Authority shall be
b. Measurement Frequency and Reporting
===“=?=
BSSSSS^SS Department of Environment and Natural Resources, and the ERA.C 'nSpeC,’°nS b> the C0*11™1 Authority, the
Sludge Management Plan
=~=E~iSi=SSs£=r permit. As a mimmim), the plan shall include the following:
description of discharge practices, including non-routine batch discharges
• description of stored chemicals
• ™ld ~ ■ ““ -'*•
SrX.2- t rU'’”ff- bu"d”8 of “"“^t structures or equipment. mea " «
Xency XX Or8amC P a“tS (“8 arri/°r -XUipZ
PAGE 14/15
03/3.0/2007 13:52 ^^537^4 RR SAN IT,DISTRICT
4.
Management
5.
6.Priority Pollutants/Total Toxic Organics (TTO)
L
TIUP # = > 003
Page 15
* The 10 largest “other significant peaks” detected by either method shall also be reported.
or Total Toxic OrganicsPth? Lillity
permission prior to commencement of use of that chemical. ’ ° mediately and obtain written
with the LnHit\m?m^nOsfL\Pitherth°er P2?LioritrrIy||r^POnSib,e maiiaginS compliance
review of the chemical addition logbook T ccrtifr tW^^k'T’15 TT0S’ 30(1 baSCd lip0Tl
^x:sc^ori,y po,,u^ ™ “
a«moth0dS
p-«e35 disc^e a. a concenX KL0r^3"* COmP°UndS
PAGE 15/15
processes, receiving stream, or land application nroeram h r SUSpeCtS ’S intCrfering with the POTW
complice, and therefore make the following certification ev^6 rate" ’’h0"5'' P‘>""tanl TT0
Certified Laboratory Analysis
Certified Operator - (Not Applicable)
the CertificatiOT&^hX^he ’J"1 UPOT ola5sifica,ion ofthe by
in responsible charge (ORC) of the wstewata S , n. T'fied wastewatcr Pre‘reat™cnt plant operator
of the type and grale eqnivafont to SUCh ~ a -nifcation
facilities by the Certification Coramissio^ The MrmitteeXw t0 ‘he wa's,ewa,er batment
the appropriate type and grade to comply with th^diti™. T. T,’ certlfied backuP operator of
the foctlity must visit thTwastewaZ M °r" XOt!™eJ5A-,Chapter 8A .02a2. The ORC of
operation and maintenance of the facility- and must coi^to n TTy "’T3^ and doc™e"t daily
The permittee shah submit a letter fei’XlnX Zlm othcr “nditi™’ of Tide ISA .0202.
Commission or their designee within thirty days after MityXsfficX t0 Cmficatio"