NC0085111_Staff Report_19960313

NPDES DOCUMENT :SCANNING: COVER SHEET
NPDES Permit:
NC0085111
Heather Glen
WTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Staff Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
March 13, 1996
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sr No ✓
To: Permits and Engineering Unit
Water Quality Section
Attention: (Susan Robson)
Date March 13, 1996
NPDES STAFF REPORT AND RECOMMENDATIO
County Durham
Permit No. NC0085111
PART I - GENERAL INFORMATION
1.
Faril_it.y and Address:Southland Assoc.
�- Heather Glen Water System
Durham, NC 27701
03 04 -
lh� SevatiKi u; eme,eAt.
2. Date of Investigation:March 11, 1996
3. Report Prepared by: Babette McKemie, P.E.
4. Persons Contacted and Telephone Number:Barnette Crabtree
919- 683-6586
5. Directions to Site:Hwy 70 W to Hwy 85 S to Cole Mill Rd.
Exit in Durham, North on Cole Mill Road (SR 1401), right on
Umstead Rd. (SR 1449),left on Craig Rd. (SR 1450) right on
unimproved road after SR 2365, site is to the left of the
Utility Easement
6. Discharge Point(s), List for all discharge points:
Latitude: 36°05'14" Longitude:78°58'34"
Attach a USGS map extract and indicate treatment facility
site and discharge point on map.
U.S.G.S. Quad No. C23SW U.S.G.S. Quad Name Northwest
Durham
7. Site size and expansion area consistent with application ?
X Yes No If No, explain:
8. Topography (relationship to flood plain included):moderately
sloping to drainage way
9. Location of nearest dwelling:none presently within 400 '

No_
G .C'47. Y E 5
10. Receiving stream or affected surface waters:UT to Sevenmile
Creek
a. Classification:WS IV NSW
b. River Basin and Subbasin No.:03 04 01
c. Describe receiving stream features and pertinent
downstream uses:well defined drainage area,
discharge will be upslope of the drainage 20areayso
that the backwash will proceed approx.
the forest floor before it enters the drainage
way.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: 450 GPD (Ultimate
Design Capacity)
b. What is the current permitted capacity of the Waste
Water Treatment facility?none
c. Actual treatment capacity of the current facility
(current design capacity)?none
d. Date(s) and construction activities allowed by previous
Authorization to Construct issued in the previous two
years:none
e. Please provide a description of existing or
substantially constructed wastewater treatment
facilities:none
f. Please provide a description of proposed wastewater
treatment facilities:none - green sand filter backwash
only
g•
Possible toxic impacts to surface waters:none
h. Pretreatment Program (POTWs only):
in development approved
should be required not needed X
2. Residuals handling and utilization/disposal scheme:n/a
3. Treatment plant classification (attach completed rating
sheet):no classification
4. SIC Code(s):
Wastewater Code(s) of actual wastewater, not particular
facilities i.e.., non -contact cooling water discharge from a
metal plating company would be 14, not 56.
Primary 22_ Secondary
Main Treatment Unit Code: 000-0

No
Yes
NO
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved. (municipals only)?no
2. Special monitoring or limitations (including toxicity)
requests:none
3. Important SOC, JOC or Compliance Schedule dates: (Please
indicate)none
Submission of Plans and Specifications
Begin Construction
Complete Construction
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available. Please provide
regional perspective for each option evaluated.not required for
non -oxygen demanding waste
Date
PART IV - EVALUATION AND RECOMMENDATIONS
This application is for a green sand filter bashwash
discharge. The site appears adequate. The discharge will have
to travel approximately 200 over a forest floor with a good
cover of leaf litter. This will prevent erosion and provide some
natural filtering of the discharge. The RRO recommends issuance
of the permit.
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A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL
Permit No. NC0085111
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. Such discharges shall be Limited and monitored by the permittee as specified below:
Effluent Characteristics
Lbs/day
Flow
Total Suspended Solids
Settleable Solids
Turbidity
Iron
Total Residual Chlorine
Discharge Limitations
Monitoring Requirements
Units (specify) Measurement Sample *Sample
Mon. Avg. Daily Max Mon. Avg. Daily Max. Frequency Type Location
30.0 mg/I
0.1 ml/I
ft
Quarterly Instantaneous E
45.0 mg/I Quarterly Grab E
0.2 ml/I Quarterly Grab E
Quarterly Grab U,D
Quarterly Grab E
Quarterly Grab E
* Sample locations: E - Effluent, U - Upstream, D - Downstream
** The discharge shall not cause the turbidity of the receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural
background conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
All samples collected should be of a representative discharge.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored quarterly at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

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ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT -DUTY ROAD HARD OR
IMPROVED SURFACE
HARD SURFACE �'C
SECONDARY H1GHW4Y
HARD SURFACE CPU= UNIMPROVED ROAD
Lat: 3e0Q5'14" Long: 2$°5 . "
Map # C23SW Sub -basin 03-04-01
Stream Class WS IV NSW
Discharge Class Industrial
Receiving Stream UT Sevenmile Creek
Qw: Permit exp. 4/30/98
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SCALE 1:24 000
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1 MILE
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7000 FEET
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1 KILOMETER
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CONTOUR INTERVAL 5 FEET
Southland Associates
Heather Glen WTP
NC0085111
Durham County