NC0085839_Waste Load Allocation_19960528

NPDES WASTE IDAD ALLOCATION
PERMIT NO.: T NN C0085839 Modeler Date Rec. # . ,
UN Corporation 5.,.,.1 c
slz.t . 23490
PERMITTEE NAME: 2
FACILITY NAME: Red Hill Quartz Operation Drainage Area (mi ) 3 `/o Avg. Streamflow (cfs): 5 1°
Facility Status: Proposed 7Q10 (cfs) 16.7 Winter 7Q10(cfs) 125.6 30Q2 (cfs) /83
Permit Status: Nev, Toxicity Limits: IWC /•X % Acutenirotic
Major 4 Minor Instream Monitoring:
Pipe No.: 001 Parameters F/ 4c 7
Design Capacity: 0.682 MGD Upstream Y Location SfAe,(4 ,41"-- w� L-44)
Domestic(%of Row): Downstream Y Location 3 do .,,
Industrial (% of Flow): 100%
Effluent .��/ ,{
comments: (. Mt P v+ lei-(C91-Tlotil ,Characteristics MOn! rtlij.ti . Pmilioix
BODS (mg/I)
NH3-N (mg/1)
RECEIVING STREAM:North Toe River D.O. (mg/1)
Class: C-Trout TSS (put ) )i' s 191( ( P)-)
Sub-Basin: 04-03-06 F. Col. (/100 ml)
Reference USGS Quad: C9SE (please attach) pH (SU) (� — o
County; Mitchell
Regional Office: Asheville Regional Office f(oo/;i I,Cii i9 ,200 10 o EFF-j)
Previous Exp.Date: 00/00/00 Treatment Plant Class:
10/6t-St (-) (pia)) ( o
Classification changes within three miles:
. fle.Ar-rinn- -) , ••k• AOrt-46-- 5447.,,e_cit.iik,L
Requested by: A Susan Wilson I i' Date: 5/28/96 _
Prepared by:AMMO Date: 6 Comments:
Reviewed by'l;► NMi.41A ,s Date: 9 "
D, N ' '/
�O

UNIMIN-NOTES TO WLA FILE •
5/28/96
The facility proposes to establish a feldspar quartz mine(this will be similar to the existing
permits for NC0000361 and NC0000175, which were modified this year to account for
Quartz production).
The major constituent is the fluoride by-product. Currently,there are no Federal Effluent
Guidelines for this type of mining.
This permit should be similar to the existing permits for this type of mining activity and
should include(minimum):
TF,TSS,Toxicity, turbidity, pH, and temperature.
The TSS load limit in the previous permit was established by taking the predicted monthly
avg. TSS concentration *permitted flow. •

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TOXICANT ANALYSIS LJ J-j �yr-J
Facility Name ?ad Jordan 1 rn
NPDES# •
�Al.�o
. Ow(MGD) 1.15,
7010s(cfs) , 84 "Q_ v /G I- 0
IP IWC(%) , 2.08
Reeving Stream north toe r. 1 0/ j
ps c 4
Stream Class c tr
OA
^ 1
..e f14:I --
FINAL RESULTS •
vet
fluoride
Max.Pred Cw 0 ugA
Allowable Cw 86624.7 ugA
Max.Value 0
chloride
Max.Pred Gla 0 ugA 13'
dt
Allowable Cw 11068709.7 ugA '
Max.Value 0 �� �� t
Max.Pred Cw 0 ugA (a�V"
Allowable Cw 4/VALUE! ugA \1--
'
Max.Value 0 If��j�
Max.Pred Cw 0!ugh ►
)1/.)-
Allowable Cw 4/VALUE! ugh % .
Max.Value 0
Max. Pred Cw OlugA
Allowable Cw #VALUE! I ugA
Z - 2,d3 X - ��
/33,„,t_ O
1
#VALUE! l ugA
01
Tf` - d ,338 -
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PAGE 1

/Ue7- /4G/vtt"/ d/
Facility:
NPDES#: C�!
Receiving Stream: north toe nr big rock or
Comment(s):
number not available
Low Flow Record Station Number.
Hydrologic Area Number: HA10
Drainage Area Low Flow Record Station:
Clave Low Flow Record Station:
.7010 Low Flow Record Station:
w7010 Low Flow Record Station: Ali Tot r,fie, VVlf'
3002 Low Flow Record Station: -4)O,14k
ff'
must be<400 sq.rouesS 010-h
�}
Drainage Area New Site: 340.00 sq.miles r" 13 0: (4 W-
MAR New Site: 1.5 cfs/miles squared `yK'4-4.� Lit
Clave per Report Equation: 510 cfs
.7010 per Report Equation: 84.14 cf.
w7010 per Report Equation: 120.75 de
3002 per Report Equation: 175.44 cis
Continue
Drainage Area Ratio: #01V/0l
[new DA/Da at page I #DIV/01
Weighted Ratio: #DIV/01
Over-ride Inappropriate Site (y):
Drainage Area New Site: 340.00 miles squared
MAR New Site: 1.5 cfs/miles squared
Weighted Owe per Report Equation: #DIV/Ol
Weighted s7010 per Report Equation: no Input from above
Weighted w7010 per Report Equation: no Input from above
Weighted 3002 per Report Equation: no Input from above

FSl��
NPDEDESIit:
Receiving Stream: north toe nr big rock cr
Comment(s):
gage number not available
Low Flow Record Station Number.
Hydrologic Area Number. Hitt 0
Drainage Area Low Flow Record Station: 104.00 miles squared
Qave Low Flow Record Station: 187.20 cfs
67010 Low Flow Record Station: 34.00 cfs
w7Q10 Low Flow Record Station: 43.00 cfs
3002 Low Flow Record Station: 63.00 cfs
must bs<400 sq.miles
Drainage Area New Site: 340.00 sq.miles
MAR New Site: 1.5 cfs/miles squared
Qave per Report Equation: 510 cfs
67010 per Report Equation: 84.14 cis
w7010 per Report Equation: 120.75 cis
3002 per Report Equation: 175.44 cfa
Continue
Drainage Area Ratio: 3.27:1
[new DA/Da at gage] Continue
Weighted Ratio: 0.24:1
Over-ride Inappropriate Site (y):
Drainage Area New Site: 340.00 miles squared
MAR New Site: 1.5 cfs/miles squared
Weighted Qave per Report Equation: 510 cfs
Weighted 67010 per Report Equation: 90.72 cfs
Weighted w7010 per Report Equation: 125.58 cis
Weighted 30Q2 per Report Equation: 182.87 do

SOC PRIORITY PROJECT: Yes No XX
IF YES, SOC NUMBER
TO: PERMITS AND ENGINEERING UNIT
WATER QUALITY SECTION
ATTENTION: Susan Wilson
DATE: May 28, 1996
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY Avery
PERMIT NUMBER NC0085839
PART I - GENERAL INFORMATION
1. Facility and Address: Unimin Corporation
Mailing: Post Office Box 588
Spruce Pine, North Carolina 28777
2 . Date of Investigation: May 14, 1996
3 . Report Prepared By: Michael R. Parker
4. Persons Contacted and Telephone Number: Roy Riddle
704/765-4283
5. Directions to Site: From the intersection of N. C. Highway
226 and North Carolina Secondary Road 1304, travel west on
NCSR 1304 0 . 7 mile to the intersection with NCSR 1305 .
travel south on NCSR 1305 0 .2 mile and follow private drive
to the Unimin Corporation property. The wastewater treatment
facility is located adjacent to the manufacturing plant .
6. Discharge Point(s) , List for all discharge points:
Latitude: 350 00' 50" Longitude: 82° 16' 05"
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
U.S.G.S. Quad No. C9SE U.S.G.S. Quad Name Huntdale, N. C.
7 . Site size and expansion area consistent with application?
X Yes No If No, explain:
8. Topography (relationship to flood plain included) : Treatment plant
not subject to flooding, located away from water.

9 . Location of nearest dwelling: Greater than 500 feet.
10. Receiving stream or affected surface waters: North Toe River •
a. Classification: C- trout
b. River Basin and Subbasin No. :040306
c. Describe receiving stream features and pertinent downstream
uses: fishing, wading, canoeing, industrial water supply,
irrigation.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted 0 . 682 MGD (Ultimate
Design Capacity)
b. What is the current permitted capacity of the Wastewater
Treatment facility? NA
c. Actual treatment capacity of the current facility (current
design capacity NA
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two years:
NA
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: NA
f. Please provide a description of proposed wastewater treatment
facilities: The wastewater treatment system will consist of
neutralization, precipitation, settling, vacuum filtering of
solids, and disposal of solids by landfilling.
•
g. Possible toxic impacts to surface waters: None anticipated.
h. Pretreatment Program (POTWs only) :
in development approved
should be required not needed
2 . Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DEM
Permit Number
Residuals Contractor
Telephone Number
b. Residuals stabilization: PSRP PFRP OTHER
C. Landfill: Tailings will be disposed of in the landfill at
the existing Quartz plant.
d. Other disposal/utilization scheme (Specify) :
Page 2

•
3 . Treatment plant classification (attach completed rating sheet) : •
Class II
4. SIC Codes (s) : 3952
Primary 41 Secondary
Main Treatment Unit Code: 51002
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds
or are any public monies involved. (municipals only) ? NA
2 . Special monitoring or limitations (including toxicity) requests: •
3 . Important SOC, JOC, or Compliance Schedule dates: (Please
indicate) •
Date
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. Staff of the Asheville
Regional Office are unaware of any alternative methods of
treatment of this wastewater.
Spray Irrigation:
Connection to Regional Sewer System:
Subsurface:
Other disposal options:
5. Other Special Items: •
Page 3

PART IV - EVALUATION AND RECOMMENDATIONS-Unimin
Corporation has requested an NPDES Permit to discharge
0.682 MGD to the North Toe River. The company plans to
construct a new ore processing plant to produce high purity
quartz products.
Based on the wasteload data it appears that Unimin
Corporation can comply with the Water Quality standard of
1 . 8 mg/1 of fluoride in the river. The preliminary
information of the wastewater treatment facility appears to
be adequate to treat this wastewater. No water quality
impacts are anticipated from this discharge.
It is recommended that the permit be submitted to notice
and issued.
Si ature of Report erparer
act kbAi(
Water Quality Reg onal Supervisor
5-- .,2,6) _(1(
Date
Page 4

HARD IMPERVIOUSLY SURFACED ROADS -
OiHER•MAIN TRAVELED ROADS
U S HIGHWAY 26 S rA l E ROU I E
HUNTDALE N.C.-TENN.