NC0000361_Wasteload Allocation_19920806

NPDES DOCIMENT SCANNING COVER SHEET
NPDES Permit:
NC0000361
Unimin Quartz Operation
Document Type:
Permit Issuance
Wasteload Allocation..
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
August 6, 1992
This document is printed on reufae paper - ignore any
coritent on the reirerse side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: Ncoo OD 3 ra /
FACILITY NAME- h CPI'? oil cut; o
Facility Status:
(circle one)
Permit Status: MOOEICATION uetirrrED NEW
(circle one)
Major Minor
Pipe No: 0 0 a
Design Capacity (MGD)• C • 3 0 O
Domestic (% of Flow)-
Industrlal (X of Flow): / O 0
Comments: N dal-4°o v.- n t, n e rc l ®rou?ss%nj
(J. tt,a_k-sf- 5- ee 57`44- yew t
d 5 rje 14 4fii 0h C.nd s ttlyoditi //is1;is
RECEIVING STREAM: I1 or / e et' tit."'
Class-
Sub-Basin-
Reference USGS Quad -
/Per
County -
Regional Office:
(clrc. •.$)
Requested By:
Prepared By,
Reviewed B
7) // !Ui4
(please attach)
Fa Mo . Ra Wa Wi WS
o,sarihe (aaron�
Date -
Date•
1a-/-ol4l
7/,?02_
Date: U
/qh
Modeler
Date Rec.
lz
Drainage Area (m12) `76• Avg. Streamflow (cfs)- /6 S
7Q10 (cfs) 30
Winter 7Q10 (cfs) 3 3 30Q2 (cfs)
Toxicity Limits: IWC J• 5 X (circle one) Acute /
Beni vTh �25t;yhe y !
Instream Monitoring:ri�//
Parameters ciorIh/ �rir�id/ /44 /L 9hg7 /
Upstream ! Location ^ ?0''s£
FA
V NTi
•
Downstream Location
Effluent
Characteristics
f ;'fra�E
r � r ,
,0A,'/, �'�/4xfAu�
'`i
BOD5 (mg/I)
NH( N (mg/1)
D.O. (mg/1)
TSS ( i )
707
/T./1- CEO
F. Col. (/100m1)
pH (SU)
`/0 (Cc)
ficia;;dE /4
/03
.�0 6 (c )
Nisritecc-144/1/kyrklilw t !d^
G4ds£ .0. ,NG/!�.,� F ,_
(!✓ ! ii iCAITC,
Comments:

Mileti4
A,
�1 ff!
I' F'
!) ,....•
ble Ro:X No 3'
'

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final Configuration III
During the period beginning on after proper notification and lasting until reidotificat on -is zmada
accordance with special condition G, the Permittee is authorized to discharge from outfall(s);- :,serial
number(s) 002-Flouride bearing wastewater. Such discharges shall be limited and monitored by the :Pgixt t tee
as specified below: tee
Effluent Characteristics
Discharge Limitations
Lbs/day Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
Flow
Total Suspended Solids 707 1414
Flourides 109 218
Settleable Solids
Turbidity
pH
0.300 MGD
(See Below)
(See Below)
This discharge shall not increase turbidity of receiving waters more than 10 NTU.
natural conditions, the discharge shall not cause any increase in turbidity.
*Daily stream sampling frequency may be reduced to three times per week.
**A11 stream samples may be grab samples.
***I - Influent, E - Effluent, U - Upstream, D - Downstream
M3
Monitoring Requirements
Measurement Sample
Frequency Type
Daily
2/month
2/month
Daily
Daily_
Daily
If the
Continuous
Composite
Composite
Grab
Grab
Grab
turbidity exceeds
*Sample
Location
I or E
E
E, U, D
E
E, U, D
E, U, D
10 NTU due to
/'The,pEnshall not be less than 6.0 standard units nor greater than 10.0 standard units and shall be
moniored as specified above.
There;sjiall be no discharge of floating solids or visible foam in other than trace amounts.

A. (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final Configuration IV
During the period beginning on after proper notification and lasting until renotification is wade
accordance with special condition G, the Permittee is authorized to discharge from outfall(s) serial
number(s) 002-Flouride bearing wastewater. Such discharges shall be limited and monitored by the Permittee
as specified below:
Effluent Characteristics
Flow
Total Suspended Solids
Flourides
Settleable Solids
Turbidity
pH
Discharge Limitations
Lbs/day Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
707 1414
103 206
This discharge shall not increase turbidity
natural conditions, the discharge shall not
M3
0.300 MGD
(See Below)
(See Below)
of receiving waters more than 10 NTU.
cause any increase in turbidity.
*Daily stream sampling frequency may be reduced to three times per week.
**A11 stream samples may be grab samples.
***I - Influent, E - Effluent, U - Upstream, D - Downstream
/.
Monitoring Requirements
Measurement Sample '^Sample
Frequency Type Location
Daily
2/month
2/month
Daily
Daily
Daily
Continuous
Composite
Composite
Grab
Grab
Grab
I or E
E
E, U, D
E
E, U, D
E, U, D
If the turbidity exceeds 10 NTU due to
The pR shall not be less than 6.0 standard units nor greater than 10.0 standard units and shall be
monitored as specified above.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (4). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final Configuration V
During the period beginning on after proper notification and lasting until renotificatc
accordance with special condition G, the Permittee is authorized to discharge -from. outfsll
number(s) 002-Flouride bearing wastewater. Such discharges shall be limited and monitored by the
as specified below:
Effluent Characteristics
Discharge Limitations Monitoring Requirements
Lbs/day Other Units. (Specify) Measurement Sample Sample
Daily Avg. Daily Max. Daily Avg. Daily Max. Frequency Type Location
Flow 0.300 MGD Daily Continuous I or E
Total Suspended Solids 707 1414 2/month Composite E
Flourides 98 196 2/month Composite E, U, D
Settleable Solids Daily Grab E
Turbidity (See Below) Daily Grab E, U, D
pH (See Below) Daily Grab E, U, D
This discharge shall not increase turbidity of receiving waters more than 10 NTU. If the turbidity exceeds 10 NTU due to
natural conditions, the discharge shall not cause any increase in turbidity.
*Daily stream sampling frequency may be reduced to three times per week.
**A11 stream samples may be grab samples.
***I - Influent, E - Effluent, U - Upstream, D - Downstream
The pH shall not be less than 6.0 standard units nor greater than 10.0 standard units and shall be
monitored as specified above.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
M3

A. (5). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final Configuration VI NPDES No. NC0000S,
During the period beginning on after proper notification and lasting until renotification is made .
accordance with special condition G, the Permittee is authorized to discharge from outfall(s) serial
number(s) 002-Flouride bearing wastewater. Such discharges shall be limited and monitored by the Permittee
as specified below:
Effluent Characteristics
F low
Total Suspended Solids
Flourides
Settleable Solids
Turbidity
pH
This discharge shall not
Discharge Limitations Monitoring Requirements
Lbs/day Other Units (Specify)
Daily Avg. Daily Max. Daily Avg. Daily Max.
707 1414
92 184
increase
natural conditions, the discharge
113
0.300 MGD
(See Below)
(See Below)
Measurement Sample
Frequency Type
Daily Continuous
2/month Composite
2/month Composite
Daily Grab
Daily Grab
Daily' Grab
Sample
Location
T or E
E
E, U, D
E
E, U, D
E, U, D
turbidity of receiving waters more than 10 NTU. If the turbidity exceeds 10 NTU due to
shall not cause any increase in turbidity.
*Daily stream sampling frequency may be reduced to three times per week.
**All stream samples may be grab samples.
***I - Influent, E - Effluent, U - Upstream, D - Downstream
The pH shall not be less than 6.0 standard units nor greater than 10.0 standard units and shall be
monitored as specified above.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

DISCHARGE SERIAL HUMMER
002
17. (Csnt'1.)
POR flat reCY USE
;i41111111
rararnetcr and Code
14*4
Influent
Effluent 1
Untreated tntike
water
(Daily Average)
in -Plant treated
Intake water
(Daily Average)
1
it
(3)
i
E
1 1` T
��t
-16 wF<
(4)
II
t
S<
1111
ar","1
a
(5)
'6
ii
ta.<
(6)
k
Z<
(7)
8
u
44
(8)
SULFATE 00945
50 mg/1
FLUORIDE 00951
a
125 lb/cay
OIL & GREASE 00550
42 mg/1
! i
IRON 01045
30 ppm
sURFRACTANTS 38260
'
..
,5mg/1
,
•
_
,
J
a
14. "ant Controls Check If the f0t-
rowing plant contras are avafYble
for Mrs e)Ucharge.
Alternate power source for major
Pumping facility.
Alarm or emergency procedure for
Dower or equipment tariurt
Complete item 3S If dlschar, Is
form Cooling and/or Stearn water
generation and water treatment
additives are use0
15. Water Treatment Additives if the
r/sCHar� b treated with any con -
endorser. Inhibitor. or aipictoe.
erelong title following:
a. Keane of Materiels)
b. Narme and a0drsti of menu-
feeturer
c. Quantity (Paunch added pa;
waitron gallons Of water treated).
Ile
214a
SUM
ARS
ALM ALTERNATE — GATE CLOSES IN CASE OF POWER FAILURE
LIME
•tick Alternate — min. 2,370 lb. lime
I -7

DISCHARGE SERIAL. NUMBER
002
ilFOR AGENCY USE !
UL11flUi
17. Dss4rlldon of twine and Discharge
For Oecf+ of the ►a•a• eterr hated 0e10w. enter to Me spo•oorlata boa the •alw fat Coda Miter angry.' VOW fO(4 inttrnctIOnt)
fdifeeti
were
hecked fn
M addition, WNW the pamme'le• name and code �dmlumMI required
i edomlur«n. toOMr. Mad. Nnnwyr~WOW. aK►lu Ileferheters n, t ht. NMcewta, oil and egr.ast.
Vat arty
Mnn+onta, cyanl0a, aluminum, arsenic. beryllium.
and chlorine (residual).
Proareseter, and Code
Flow'
Gallons per day
00056
pH
Uniu
00400
50050
Tansperature (vtntcr)
'F
74028
Temperature (summer)
'F
74027
Siodueniall Oxypn Demand
(10D S-day)
min
00310
Influent
Effluent
lfl
(1)
Ciamekel Oxygen Demand (COD)
00340
Total Saspsadsd (aaa!litasbie)
Solids
sae
00530
Specific Conductance
*Iaoalmoafan at 2S' C
00095
Settleable Matte: (ssidsfe)
se1/1
0054S
e
d
(3)
6.0
x
0.3
9.0
•
50
•
*Other d$ sbarias intake flow (seral nembers).(see instructions)

4 - 6
1S. Waste Abatement
a. Waste ^Basement •ractrcet
Oescrtoe the ..rite aDete•n"
pract.cel'jute on thts emotive'
w.It'• a brit• n3t let ive (set
instructions)
b. Waste Abetelttent Circlet
Using the Cone$ lifted en Table
It 01 the Irt1IfUttror• floosie.
describe the waste abate" en:
protegees for this dttcriat9e to
tnt orde• In watch they oCCU'
It possible
l)1SCt4narS St 1l1Al NUMIIf R
002
t<Qllt AGE- NCY USE t
1. 1
Waste treatment of the waste water which may
:is. 1 Narrative: — ---- — —_
contain fluorides includes its neutralization with
Time in specially installed agitation tanks,
its thickening in a mechanical device, and the
disposal of solids to a separately constructed
waste disposal area. Where practical thickener
. overflow is recycled. Also, water frq .existing
plant's ponds is recycled as process water to
non -fluoride areas of the new facilities.
2u0 I c11
(11 �TH7�K ,
(71
(10)
(131
(161
(191
(221
(25 )
RECYCL (�) PSGDIM
RUSEOR
(51----•---
(3)
• (61
• (91
. (121
• (151
(Id)
(2 U
(211
11-4

OISCMARQESERIAL NUM$ER
002
16. W•t•wster CMreeterktia
iiii
FOR AGENCY VSE
CnKk the Des b iJO• ••cn eonetltuent wf►Icr /t present to tM effluent (machetes water). T is Mter�+tnarti•n h to lee Wed on •Reuse/ eMtpslt
•r beet es1Imete.( a lnttruct+on0
Perimetermeter
~�
Colo:
0006 C.
Copper
01042
�"
Ammonia
00610
r~
iron
0104S
"r"—'1
X
Ow nee nitrogen
00605
Lead
01051
Nitrate
0062C.
Me�ttesium
0092 7
.d',
Nitrite
00615
Manganese
010SS
Phosp ho: u s
006i5
Mercury
71900
Sulfate
0094!
X
Molybdenum
01062
Sulfide
0074!
Nickel
01067
Sulfite
0074C.
Selenium
01147
Bromide
7187r.
Siher
01077
Chloride
mow
X
Potassium
00937
Cyanide
00720
Sodium
00929
Mond
00931
X
Thalbum
01059
`
Aluminum
01105
Titanium
01152 .
Antemon)
01097
Tin
01102
Arsenic
01002
Zinc
01092
Beryllium
01012
•
7 031
Bar lum
010u7
Chlorinated manic t otporstds•
74052
Boron
01022
1
Pesticid es°
74033
Cadmium
01027
Oil sal
00550gam
X
Calcium
00916
Phenols
32730
Cobalt
01037
ftaiactaata
31260
X
Chromium
01034
Chlorine
10060
Fecal colifotm lanais
7405S
Radioactivity'
74050
s autestames. compounds and/or sienna is hew 26.
Psatieides (insecticides. funag�icides, and rodeaticides) snug be reported la hams of Ilya acaeptabk at»esaon
names specified as Accepre 4Je Common Noses a stf tD inkef Aiiewes for the ht0+afirat tanutweRt oft
Pesticide Lath. Zed Edition, Enefronrneatal Protection Agents. Wedingtort. D.C. 20250. lane 1972. as
required by Subsection 162.7(b) of the Regu1sttoa for the Estforeennot of the Fadesal Insecticide,
Fungicide. sod kodentidde Act.
11•5

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:
FACT SHEET FOR WASTELOAD ALLOCATION
Request # 6651,
Uniniin Corp -Spruce Pine -Mica Operations (PIPE 002)
NC0000361
Industrial - 100%
Existing
Renewal
The North Toe River
WS-III Trout
040306
Avery
Asheville
Barona
12/20/91
D11NW
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
96.5
30
39
165
55
/, S%
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility requesting renewal of existing NPDES permit. One of the four fluoride bearing waste
dischargers into the North Toe River. All facility permits are interdependent because total
assimulative capacity of fluoride is allocated between the four industries and all permits should be
issued at the same time per the Asheville RO. `v
Special Schedule Requirements and additional comments from Reviewers:/
Ce cd,«,we, L ,-e_?ee t.n. /aX/c,'f� / 0,1716.4-1%tiif ix; .7 fldiv/l!'s 43 /1/V, M#•t
x� 4 a fz 7/A.vi' 1191°t Q1"- ( /cJD4ae...rrc_ 4-4
Recommended b "` /4' 1/.u.00 Date: 5/20/92_
` 5/L1 9 Z-
Reviewed by
Instream Assessment: ° L-0R/� Date: s1 �7 �� a'
Regional ��e isor: T %� Date: 2/ / 9
%r
Permits Engineering: ,(-e---A--/ Date: -74 3 f /l L
RETURN TO TECHNICAL SERVICES BY:
J U N 2 7 1992

2
Type of Toxicity Test:
Existing Limit
Recommended Limit
Monitoring Schedule:
Rxisting Limits
TOXICS/METALS/CONVENTIONAL PARAMETERS
Chronic pass/fail
Apr,Sit,
L,
Daily Average Daily Max.
Wasteflow (MGD): 0.300
TSS (#/d): 707 1414
pH (SU): 6-9
Turbidity (NTU):
Temperature (C): **
*The discharge shall not increase turbidity of receiving waters mote than 10 NTU. If the turbidity exceeds 10 NTU
due to natural conditions, the discharge shall not cause any increase in turbidity.
** The temperature of the effluent shall be such as not to cause an increase in the temperature of the receiving stream
of more than 0.5 degrees C and in no case cause the ambient water temperature to exceed 20 degrees C.
Recommended Limits
Daily Average Daily Max. WQ or EL
Wasteflow (MGD): 0.300
TSS (#/d): 707 1414 EL
Fluorides (#/d): 103 206 EL
Turbidity (NTU): *
Settleable Solids (ml/1): monitor
pH (SU): 6-9 EL
*The discharge shall not increase turbidity of receiving waters mote than 10 NTU. If the turbidity exceeds 10 NTU
due to natural conditions, the discharge shall not cause any increase in turbidity.
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow Fluorides
New pretreatment information
Other (onsite toxicity study, interaction, etc.)
Parameter(s) are water quality limited. For some parameters, the available load capacity of the immediate
receiving water will be consumed. This may affect future water quality based effluent limitations for additional
dischargers within this portion of the watershed.
OR
X No parameters are water quality limited, but this discharge may affect future allocations.

3
INSTREAM MONITORING REQUIREMENTS
Upstream Location: Kaolin Pumphouse
Downstream Location: Franklin Town Bridge
Parameters: Fluoride, turbidity,pH,settleable matter
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (Y or N)
(If yes, then attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old
assumptions that were made, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.

•
Facility Name NOWA/
41,21. J Permit # &&000 .% /
Pipe # "OL
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
(**Chronic Toxicity (Ceriodaphnia) P/F at kr %, B A YMI Na , See Part , Condition 1) .)
11110
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay
Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality
is 1. S % (defined as treatment two in the North Carolina procedure document). The permit holder shall perform
guarter(v monitoring using this procedure to establish compliance with the permit condition. The first test will be
performed after thirty days from the effective date of this permit during the months of
„"art., A t )___Su 1, 0 cat'_ . Effluent sampling for this testing shall be performed at the NPDES
permitted final effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B.
Additionally, DEM Form AT-1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607-6445
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Environmental Management indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival and appropriate environmental controls, shall constitute an invalid test and will require immediate
retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with monitoring requirements.
7Q10 •3Q cfs
Permitted Flow o. 36 a MGD
IWC% /• f
Basin & Su_ b-basin F �b
Receiving Stream 1014 lit R.Ai<r
County 11d4,
ended by:
QCLR Version 9/91

N. C. DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
ENVIRONMENTAL MANAGEMENT COMMISSION
FACT SHEET
APPLICATION FOR
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
PERMIT TO DISCHARGE TREATED WASTEWATER
Application Number NC0000361
1. SYNOPSIS OF APPLICATION
a. Name and Address of Applicant
Unimin Corporation - Mica Operation
Post Office Box 628
Spruce Pine, North Carolina 28777
Date
b. Description of Applicant's Operation
Production of clay, feldspar, mica, quartz and sand.
c. Production Capacity of Facility
1250 tons/day of raw ore - Discharge 001
515 tons/day of raw ore - Discharge 002
d. Applicant's Receiving Waters
North Toe River
Classification - "WS III - Trout"
For a sketch showing the location of the discharge(s), see
Attachment A.
e. Description of Existing Pollution Abatement Facilities
The existing wastewater treatment system consists of an
influent lift station, screw classifier, two hydrocyclones,
three inorganic solids settling basins operated in series,
continuous pH recorder, automatic effluent pH control system
with control units on the lime and sulfuric acid feed
systems, baffled flume to improve mixing and flow measuring
and totalizing equipment.

f. Description of Discharges (as reported by applicant)
Discharge 001 - Non -Fluoride Bearing Wastewater
Pollutants which are present in significant quantities or which
are subject to effluent limitation are as follows:
Effluent Characteristic
Reported Load
(Specify Units)
Average Maximum
Flow 0.81 MGD 1.83 MGD
Total Suspended Solids 7.32 mg/1 26.1 mg/1
Fluorides 0.27 mg/1 0.48 mg/1
pH min. 6.0 s.u. max 9.0 s.u.
Turbidity 8.0 NTU 18 NTU
Settleable Matter ;0.1 ml/1
Effluent monitoring data reported by Unimin Corporation during
September 1, 1990 - August 31, 1991.
Discharge 002 - Fluoride Bearing Wastewater.
No discharge has occurred from this discharge point.
No data is available.

2B. PROPOSED FINAL EFFLUENT LIMITATIONS
Effluent Characteristic
Discharge 001
Discharge Limitation
(lbsJdayj_ Other Limitations
Daily Daily (Specify Units)
Average Maximum Average Maximum
Flow 2.16 MGD
Total Suspended Solids 20 mg/1 30 mg/1
Fluorides
Settleable Solids
Turbidity (See below)
pH 6.0 su 10.0 su
Temperature (See below)
Chronic Toxicity Pass/Fail at 5.2% - See Attachment B
This discharge shall not increase turbidity in the receiving water more
than 10 NTU. If the turbidity exceeds 10 NTU due to natural conditions,
the discharge shall not cause any increase in turbidity.
The temperature of the effluent shall be such as not to cause an increase
in the temperature of the receiving stream of more than 0.5 degrees C and
in no case cause the ambient water temperature to exceed 20 degrees C.
Discharge 002
Flow 0.300 MGD
Total Suspended Solids 707 1414
Fluorides 103 206
Settleable Solids
Turbidity (See below)
pH 6.0 su 10.0 su
Chronic Toxicity Pass/Fail at 5.2% - See Attachment C
This discharge shall not increase turbidity in the receiving water more
than 10 NTU. If the turbidity exceeds 10 NTU due to natural conditions,
the discharge shall not cause any increase in turbidity.

r
itd f- •j
`Gres r : ley •
Ch
rm T-"1T'-.- CORPORATION —MICA
ATTACHIMET A
\\,
..LLV+�`� . > ;�y �` Airstrip`t •
Qry J�'%7 i '•`` ♦, ♦t as '. O•\.../ /)/ ` `i —�..� ~�, .•
4
b1e• .
3974
Q

ATTACHMENT B
Chronic Toxicity Testing Requirement Discharge 001
The effluent discharge shall at no time exhibit chronic toxicity
using test procedures outlined in:
1. The North Carolina Ceriodaphnia chronic effluent
bioassay procedure (North Carolina Chronic Bioassay
Procedures - Revised *February, 1.987) or subsequent
versions.
The effluent concentration at which there,.may be no observable
inhibition of reproduction or significant mortality is 5.2%
(defined as treatment two in the. North Carolina procedure
document). The permit holder shal]perform quarterly monitoring
using this procedure to establish compliance with permit
condition. The first test will be performed within thirty days
from issuance of this permit during t1 e months of February, May,
August, and November. Effluent sampt.iag�for this testing shall be
performed at the NPDES permitted final effka.uent discharge below
all treatment processes.
All toxicity testing results required as part of this permit
condition will be entered on the Effluent Discharge Monitoring
Form (MR-1) for the month in which i.t was perfoFmed, using the
appropriate parameter code TGP3B. Additionally,` DEM Form AT-1
(original) is to be sent to the following address:
Environmental Sciences Branch
North Carolina Division of Environmental Management
4401 Reedy Creek Road
Raleigh, North Carolina 27607
Test data shall be complete and accurate and include all
s>_}pporting chemical/physical measurements . performed in association
i 4th the toxicity tests, as well as a1.l dose/response data. Total
residual chlorine of the effluent tonicity must be measured and
reported if chlorine is employed fo': disinfection of the waste
stream.
Should any test data from this monitoring requirement or tests
performed by the North Carolina Division of Environmental
Management indicate potential impacts to the receiving stream,
this permit may be reopened and modified to include alternate
monitoring requirements or limitations.
Note: Failure to achieve test conditions as specified in the
cited document, such as minimum control organism survival and
appropriate environmental controls, shall constitute an invalid
tests and will require immediate t•c,t:esting (within 30 days of
initial monitoring event). Failure to submit suitable test
results will constitute non-compliance with monitoring
requirements.

ATTACHMENT C
Chronic Toxicity Testing Requirement. Discharge 002
The effluent discharge shall at no time exhibit chronic toxicity
using test procedures outlined in:
1. The North Carolina Ceriodaphnia chronic effluent
bioassay procedure (North Carolina Chronic Bioassay
Procedures - Revised *February, 1.987) or subsequent
versions.
The effluent concentration at which there may be no observable
inhibition of reproduction or s'.gnif_icaht mortality is 5.2%
(defined as treatment two in the North Carolina procedure
document). The permit holder shall perform quarterly monitoring
using this procedure to establish compliance with permit
condition. The first test will be performed within thirty days
from issuance of this permit during the months of February, May,
August, and November. Effluent sampl. i\fig .for this testing shall be
performed at the NPDES permitted f i. n a 1. of f luent discharge below
all treatment processes.
All toxicity testing results requiredas part of this permit
condition will be entered on the Effluent Discharge Monitoring
Form (MR-1) for the month in which it was performed, using the
appropriate parameter code TGP3B. 1ldditionally' DEM Form AT-1
(original) is to be sent to the following address:
Environmental Sciences Branch
North Carolina Division of Environmental Management
4401 Reedy Creek Road
Raleigh, North Carolina 27607
Test data shall be complete and accurate and include all
supporting chemical/physical measurements performed in association
With the toxicity tests, as well as a1.]. dose/response data. Total
,tesidual chlorine of the effluent toxicity must be measured and
reported if chlorine is employed for disinfection of the waste
'stream.
Should any test data from this monitoring requirement or tests
performed by the North Carolina Di-ii. sion of Environmental
Management indicate potential impacts to the receiving stream,
this permit may be reopened and modified to include alternate
monitoring requirements or limitations.
Note: Failure to achieve test conditions as specified in the
cited document, such as minimum control organism survival and
appropriate environmental controls, shall constitute an invalid
tests and will require immediate rie,sting (within 30 days of
initial monitoring event) . Failure to submit suitable test
results will constitute non-compliance with monitoring
requirements.