NC0021857_Wasteload Allocation_19900831

NPDES DOCUNENT SCANNING COVER SHEET
NC0021857
Newland WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wastec19dAllO2tOfl,
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Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
201 Facilities Plan
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
August 31, 1990
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DIVISION OF ENVIRONMENTAL MANAGEMENT
August 31, 1990
MEMORANDUM
TO: Roy Davis, Regional Supervisor
Asheville Regional Office
FROM: Betsy Johnson
Technical Support Branch/
THROUGH: Carla Sanderson
'Trevor Clement s
SUBJECT: Instream Assessment for the Town of Newland
NPDES Permit No. NC0021857
Avery County
SOC Case No. 90-41
Summary and Recommendations
Technical Support has reviewed the request for an instream assessment for the
Town of Newland. The Town has requested an SOC because their facility is out of
compliance with its flow limit due to inflow and infiltration (I&I) problems.
The Town would like to relax its limits for flow. With the addition of 0.02 MGD
to the existing 0.1604 average MGD, the plant will reach a flow of 0.1804 MGD
which exceeds the permitted flow by 0.0204 MGD.
A Level-B analysis was not performed since permit violations are due to I & I
and the facility is meeting all permitted limits except flow. The facility must
return to its design flow (0.16 MGD) at the end of the SOC period, or obtain an
NPDES permit modification for a higher wasteflow.
Background Information
The Town of Newland WWTP discharges into the North Toe River, a class "C-Trout"
river. North Toe River drains approximately 10 square miles at the discharge
site. The USGS estimates the following flows at the discharge site: summer 7Q10
= 3.3 cfs, winter 7Q10 = 4.8 cfs, and average flow = 22 cfs. The creek is swift
moving with a stream bed gradient ranging from 35 to 188 feet per mile.
The Newland facility compliance record is excellent with the exception of flow.
The facility has secondary limits but is operating at BOD5 < 5 mg/1, NH3-N < 1
mg/1, and TP < 1 mg/1. The region should check the accuracy of the compliance
records.

Request Form for In -Stream Assessment for 67B
NAME OF FACILITY _Town of Newland SUBBASIN French Broad
COUNTY _Avery REGION ASHEVILLE DESIGN FLOW 0.160 MGD
RECEIVING STREAM North Toe River
Pew r
BACKGROUND DATA:
A. Why is SOC needed? (Facility is out of compliance with which
effluent limits?
Facility is exceeding the flow limit due to excessive
infiltration/inflow to the sewer collection system.
B. History of SOC requests:
1. Monthly Average waste flow
prior to any SOC _ 0.1604 mgd
(Based on latest 12 month average)
2. SOC flow added: Date: flow: mgd
Date: __ flow: mgd
Date: ---____ .._ ._. _._. _ flow: mgd
total of previously approved SOC flow: mgd
3. Flows lost from plant flow: 0 mgd
4. This SOC request flow: 0.020 mgd
5. Total plant flow post-SOC
(sum of original flow and
SOC flow minus losses) flow: 0.1804 mgd
6. Is this an accurate flow balance for plant? Why/why not?
It is as long as the current monthly average waste flow remains
close to the reported value in item B.1. above. Significant
deviation from that value will significantly alter the total
plant flow.
C. Please attach DIM summary for past year for all permitted parame-
ters. If possible, include reports from previous years if
facility has been under. SOC for more than a year.
MP screen compliance evaluation analysis report has been included
with the SOC package.

THIS SOC:
A. Request is for domestic or industrial waste If it is a combin-
ation, please specify percentages.
Request is for domestic waste only.
B. What type ot industry? please attach any pertinent data.
N/A
C. The region proposes the following SOC limits:
B0D5 30 -...__ mg/1
NH3 -- ----- __ - - mg/1
DO mg/1
TSS 30 ....._- mg/1
#/100 ml
fecal coliform 1000
pH
Flow
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