NC0075205_Wasteload Allocation_19940208

NPDES WASTE LOAD ALLOCATION
PERMIT NO.. NC0075205
PERMr= NAME: Mid South Water Systems
FACILITY NAME: Alexander Island W WTP
Facility Status: Existing
Permit Status: Renewal
Major
Minor -4
Pipe No.: 001
Design Capacity: 0.015 MGD
Domestic (% of Flow):
Industrial (% of Flow):
Comments:
11
RECEIVING STREAM: Catawba River (Lake Norman)
Class: WS-IV, B
Sub -Basin: 03-08-32
Reference USGS Quad: E15SW (please attach)
County: Iredell
Regional Office: Mooresville Regional Office
Previous Exp. Date: l/l/94 Treatment Plant Class: II
Classification changes within three miles:
Requested by:
Prepared by:
Reviewed by:
B0 —
GI iZ
Charles Alvarez
Date: 2/7/94
Date:
Date:
Modeler
Date Rec.
#
.SM/J
Q'1"l35
Drainage Area (mil ) Avg. Streamflow (cfs):
7Q10 (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/0
NH3-N (mg/1)
D.O. (mg/1)
TSS (mg/1)
F. Col. (/100 nil)
pH (SU)
Comments:

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
Existing WI.A checked:
Staff Report:
Topo checked:
USGS Flows confirmed:
IWC Spreadsheet:
Stream Classification:
Nutrient Sensitivity:
Instream Data:
Request# g7735
Alexander Island WWTP - Mid South Water System
NC0075205
100 % Domestic
Existing
Renewal
Lake Norman (Catawba River Arm)
WS IV and B
03-08-32
Iredell
Mooresville
Alvarez
2/8/94
E15SW
nr
x Water Supply
nr
Stream Characteristic:
USGS #
Date:
1988
Drainage Area (mi2y
Lake
Summer 7010 (cfs):
60 Instantaneous
Winter 7Q10 (cfs):
60 Instantaneous
Average Flow (cfs):
60 Instantaneous
30Q2 (cfs):
o, o y 1/0
IWC (%):
1988: proposed prior to initiation of BPJ limits, (15 / 4) for dischargers to Lake Norman. Secondary Limits w/ diffuser and 1,000' into
Lake outfall requirements.
DMR,s
Facility is within its permitted effluent limits, a@hough residual chlorine levels are excessive.
Staff Report
Excessive chlorine levels were noted.
Region recommendation to apply BPJ limits, (15 / 4) to existing facility - not possible w/out changes to discharge
Central Files
no additional information
Exlsrinq Limits:
Monthly Averages
Wasteflow (MGD): 0.015
BODS(mgft 30
NH3N (mgA): monitor
DO (mg/I): 5.0
TSS (mgA): 30
Fecal Col. (/100 ml): 200
pH (SU): 6-9
Residual Chlorine (pg/I): monitor
Temperature (° C): monitor
TP (mgA): nr
TN (mgA): nr
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Upstream Location: r 2vAeer-A
Downstream Location: m�wrerd
Parameters:

LIST OF 100% DOMESTIC FACILITIES
WHICH ARE RENEWING WITHOUT MODIFICATION RECEIVED 8N3
Permit M Facility Stream Sub -basin County Region MOD Comments
73695
SILVER BULLET FOOD MART, INC.
LITTLE CRABTREE CREEK
040306
YANCEY
ARO
1MN
74136
JOHN SPAETH TRAVEL TRAILER PK
DUNN CREEK
040302
HENDERSON
ARO
IMN 4
74632
DAVIDSON LAND COMPANY
SOUTH PRONG CLARK CREEK
030711
MECKLENBURG MRO
MMW I
75205
AL XANDER ISLAND/GOODECRAMER
LAKE NORMAN
030832
IREDELL
MRO
1MN 4 A.Ou fall should be 1OW into lake w/ diffuser
75647
HIDDEN GAP MHP
UT DEVILS FORK CREEK
040302
HENDERSON
ARO
JMN 4
77607
NORTH WILKESBORO DRAGWAY
UT NAKED CREEK
030701
WILKES
WSRO NOW
>VNG , n1t,�flL,
refer: Basinwide I SoresubbasinVLA file
a
KEYS TO COMMENTS:
Oa. No policy given. Alternatives analysis should be required.
Ob. Facility must meet 5 do I (by date given in parenthesis).
Oc. Alternatives analysis requested.
Od. Alternatives analysis submitted.
Oe. Facility will correct to POT W.
1. Phased permit.
2. Documented instream water quality problems.
3. Facility is requesting modification.
4. WLA should be done per basinwide pemutting schedule.

w ry A�4
ED
`AuG 31 1993
f LGHMWAL sue?URT BAK" }
SOC PRIORITY PROJECT: No
to: Permits and Engineering Unit
Water Quality Section
Attention: Susan Robson
Date: August 27, 1993
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Iredell
NPDES Permit No.: NCO075205
MRO No.: 93-205
PART I - GENERAL INFORMATION
1. Facility and Address: Alexander Island WWTP
c/o Mid South Water Systems
Post Office Box 127
Sherrills Ford, N.C. 28673
2. Date of Investigation: August 27, 1993
3. Report Prepared By: Michael L. Parker, Environ. Engr. II
4. Person Contacted and Telephone Number: Cliff Barton, ORC
[phone].
5. Directions to Site: The WWTP site is located at the western
end of SR 1102 (Langtree Road) approx. 2.2 miles west of
where SR 1102 crosses I-77 in southeastern Iredell County.
6. Discharge Point(s), List for all discharge Points: -
Latitude: 35° 31' 04"
Longitude: 800 53' 59"
Attach a USGS Map Extract and indicate treatment plant site
and discharge point on map.
USGS Quad No.: E 15 SW
7. Site size and expansion area consistent with application:
Yes. Limited area available for expansion, if necessary.
8. Topography (relationship to flood plain included): The WWTP
is located above the high water elevation of Lake Norman.
9. Location of Nearest Dwelling: Approx. 150 feet from the
WWTP.

Page Two
10. Receiving Stream or Affected Surface Waters: Catawba River
(Lake Norman) . i n :_ 1),,,.:_. ,
a. Classification: WS-IV, B
b. River Basin and Subbasin No.: Catawba 030832
C. Describe receiving stream features and pertinent
downstream uses: Discharge enters main creek channel
of Lake Norman. A municipal water intake exists approx.
2.5 miles south of the discharge point. The receiving
stream is used for primary and secondary recreation and
receives frequent bodily contact.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater: 0.015 MGD (Design Capacity)
b. What is the current permitted capacity: 0.015 MGD
C. Actual treatment capacity of current facility (current
design capacity): 0.015 MGD
d. Date(s) and construction activities allowed by previous
ATCs issued in the previous two years: N/A
e. Description of existing or substantially constructed
WWT facilities: The existing WWT facilities consist of
an equalization tank followed by a flow splitter box,
two (2) extended aeration WWTPs connected in parallel
(each has 0.0075 MGD capacity) with aeration and
clarification, dual tertiary sand filters, an aerated
sludge holding tank, tablet disinfection with contact
chamber and post aeration.
f. Description of proposed WWT facilities: If the
permittee is unable to reduce effluent residual
chlorine, dechlorination may be necessary.
g. Possible toxic impacts to surface waters: Chlorine is
added to the waste stream.
h. Pretreatment Program (POTWs only): N/A
2. Residual handling and utilization/disposal scheme: Residuals
are removed by Roberts Septic Tank Service and hauled to the
City of Newton for disposal.
3. Treatment Plant Classification: Less than 5 points; no
rating (include rating sheet). Class II
4. SIC Code(s): 4952
Wastewater Code(s): 04
5. MTU Code(s): 06107

Page Three
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)?
No
Special monitoring or limitations (including toxicity)
requests: None at this time.
3. Important SOC/JOC or Compliance Schedule dates: N/P.
4. Alternative Analysis Evaluation
a. Spray Irrigation: Insufficient area available.
b. Connect to regional sewer system: None available.
C. Subsurface: Insufficient area available.
PART IV - EVALUATION AND REC_.OMMENDATIONS
The permittee requests renewal of the subject Permit to
discharge treated domestic wastewater from a WWT facility that
serves the Alexander Island development. The facilities appeared
to be in excellent operational condition at the time of the site
inspection.
The ORC has experienced some difficulty in maintaining an
acceptable chlorine residual. Some options were discussed during
the inspection and will be attempted by the operator. Should
residual levels continue to remain elevated, the addition of
dechlorination facilities may be necessary.
The permittee has also experienced difficulty in stabilizing
the outfall line on the bottom of the Lake. Recently, additional
weight was added to the line and it appears to be holding the
outfall in place.
It is our understanding that current policy is to renew the
Permit with existing limits if no changes are proposed. It has
been the policy of this Office to recommend BPJ limitations
(BODS-15 mg/1, NHl as N-4 mg/1) for all WWT facilities
discharging (or proposing to discharge) into water supply
reservoirs, including those facilities proposing to expand or
upgrade. Since the existing facilities are capable of complying
with the BPJ limitations without having to expand or upgrade, it
is recommended that the Permit be reissued contain the above
referenced BPJ limits.
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Signature of eport Preparer Date O
t�iSte�i!a f� ��%2G O 2
Water Quali y Regional iftervisor Date