NC0029033_Wasteload Allocation_19820111

•North Carolina Department of Natural
Resources &Community Development
James B. Hunt, Jr Governor Joseph W. Grimsley, Secretary
Jr., W. Secretary
Division of Environmental Management
January 11, 1982
Mr. Gordon Ruggles
Hazen and Sawyer Engineers
P. 0. Box 30428
4505 Creedmoor Rd.
Raleigh, NC 27622
Dear Mr. Ruggles:
Attached please find a tabulation of effluent limits for the period
December 1 to March 31 for the proposed expansion of Raleigh's Neuse River WWTP.
The limits are maximum monthly mean values unless otherwise noted. The limits
reflect current policies and methodologies in the State Continuing Planning
Process and are part of the Neuse River Basin Plan. Also, we have attached a
discussion and explanation of the effluent limits.
One set of effluent limits applies to the discharge until the Falls of the
Neuse Reservoir is officially operating and capable of augmenting river flow
below the dam. This set of limits is based on the "winter" 7Q10 estimated by
USGS for the point of discharge. Also, the design temperature has been adjusted
to reflect the seasonal change.
The other set of limits are based on the Corps of Engineers' plan to augment
flow in the river below Falls Dam. As mentioned in the letter of December 14,
1981, these limits are based on an augmented flow of 184 cfs measured at Smithfield.
These limits are valid only if the Corps implements their plan to augment the river
flow at this level.
If you have any questions concerning these limits, please contact
Mr. Randy Williams of my staff.
Attachment
cc: R. W. Van Tilburg
Randy Williams
Louis Eckley
Allen Wahab
G. Smedes York
Sincerely,
Original dined By
FORREST R. VIS T ALL
Forrest R. Westall, Head
Monitoring & Technical Services Branch
P. O. Box 27687 Raleigh, N. C. 27611-7687

Form 1.7001 , '•
#263
Facility Name:
County: Wake Sub -basin: 01-04-07
Regional Office: Raleigh Requestor: Hazen & Sawyer Engineers
Type of Wastewater: Industrial
cv
Domestic 100
If industrial, specify type(s) of industry:
WASTE LOAT) ALLOCATION APPROVAL FORM
Neuse River WWTP - City of Raleigh
Receiving stream: Neuse River _ Class: C
Other stream(s) affected: Neuse River Class: A -II
7Q10 flow at point of discharge: Regulated
30Q2 flow at point of discharge:
Natural stream drainage area at discharge point: 1099 sq. mi.
Recommended Effluent Limitations
Parameter Monthly Averages
Flow 30 MGD 40 MGD 50 MGD
BOD5 (mg/1) 16 11 7
NH3-N (mg/1) 5 4 4
D.O. (mg/1) 5'' 5 5
TSS (mg/1) 30 30 30
pH (S.U.) ' 6-9 6-9 6-9
Fecal Coliform (#/100 ml) 1000 1000 1000
Note: These limits are based on a low flow of 254 cfs at Smithfield,
This allocation is: / / for a proposed facility
/ / for a new (existing) facility
based on flow augmenta-
/X/ a revision of existing limitations tion, increased
/ / a confirmation of existing limitations wasteflows
Recommended and reviewed y: / CN�(�%6 ✓
GVr�.1( B4gy teaLe
Head, Techncial Service BranchAVed-,edG Date:
Reviewed by:
Regional Supervisor Date: /2
Permits Manager . ...�� / / Date:
Approved by:
Division Director
Date: / 4/

Form #001
#263
WASTE LOAD ALLOCATION APPROVAL FORM
Facility Name: Neuse River WWTP - City of Raleigh
County: Wake Sub -basin: 03-04-02
Regional Office: Raleigh Requestor: Hazen and Sawyer Engineers
Type of Wastewater: Industrial
Domestic 100
If industrial, specify type(s) of industry:
Receiving stream:
Neuse River
Other stream(s) affected: Neuse River
7Q10 flow at point of discharge: 70 cfs
30Q2 flow at point of discharge:
Natural stream drainage area at discharge point:
Class:
Class:
A -II
1099 sq mi
Recommended Effluent Limitations
Flow 30 MGD 40 MGD 50 MGD
BOD5 (mg/1) 7 6 5
NH3-N (mg/1) 4 3 3
DO (mg/1) 5 5 5
TSS (mg/1) 30 30 30
pH (SU) 6-9 6-9 6-9
Fecal Coliform (#/100 ml) 1000 1000 1000
NOTE:
These limits will apply until Falls Reservoir is officially
operating and augmenting the low flow.
This allocation is: / / for a proposed facility
/ / for a new (existing) facility
/11V a revision of existing limitations
/ / a confirmation of existing limitations
Recommended and reviewed by:
41n44 2f,
Head, Techncial Serviges Branch
Reviewed by:
Regional Supervisor
Permits Manager
Approved by:
Division Director
Date: Jam?-/'/-gi
Date:
Date: .4 /Z 3��'f
Date: ! FL
Date: /,72.

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