NC0041696_Environmental Assessment_19930419

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0041696
Lake Rhodhiss WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Staff Comments
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
April 19, 1993
This document is printed on reuse paper - ignore any
content on the resrerse 'side

svvii/
State of North Carolina
Department of Environment, Health, and Natural Resources
512 North Salisbury Street • Raleigh, North Carolina 27604
James B. Hunt, Jr., Governor
• APR 21 199Z
rcy
MEMORANDUM
TO:
FROM:
SUBJECT:
DIVISION OF ENVIRONMENTAL MANAG &Nitn B. Howes, Secretary
April 19, 1993I
Melba McGee
Roy M. Davis
Regional Supervisor
Environmental Assessment
Valdese Water Treatment Plant Expansion
February, 1993
Burke County
APR23
Settling basin sludge and filter backwash from the Valdese Water Plant
are currently discharged to the Town's Wastewater Treatment Plant
which has experienced upset conditions asa result of this
wastestream. The subject environmental assessment makes no mention of
the treatment problems caused at the Valdese Wastewater Treatment
Plant by water plant waste nor does it make a proposal for adequate
treatment of the water plant waste. Until such time as, adequate
provisions are made for disposal of water plant waste streams, the
Division of Environmental Management must view the subject
environmental assessment as inadequate.
RMD:ls
XC:
Town of Valdese
Steve W. Tedder
James R. Reid
Interchange Building 59 Woexlfin Place, Asheville, N.0 28801 • Telephone 7t4-25145208
An Equal ( )ppmtunny Affirmative. Action Fmplov r

DIVISION OF ENVIRONMENTAL MANAGEMENT
April 14, 1993
MEMORANDUM
TO: Monica Swihart
FROM: Jacquelyn M. Nowe11
THRU: Ruth Swanek gC7
Carla Sanderson l)
SUBJECT: Environmental Assessment for Valdese Water Treatment Plant Expansion
Burke County
The Technical Support Branch has reviewed the environmental assessment for the
subject facility. The "Environmental Consequences" part of the assessment did not
specifically have a section labeled "Water Quality", but pertinent issues were addressed
under Water Supplies and Secondary Fish and Fish Habitat Impact. The expansion of the
Valdese WTP from 8 MGD to 12 MGD will withdraw an additional 4 MGD (or 6.2 cfs)
from Lake Rhodhiss. Due to the large volume of water present, the increase in withdrawal
should not affect existing downstream dischargers or the aquatic life in Lake Rhodhiss.
Please contact me if you have any additional questions.
cc: Rex Gleason
WLA File

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North Carolina Department of Environment,
Health, and Natural Resources

MODEL RESULTS
Discharger ; CITY OF MORGANTON
Receiving Stream : CATAWBA RIVER
The Enc D.O. is 3.63 mg/ .
T e Enc CBOD is 4.10 mg/I.
Tie EnC NBOD is 3.39 mg/ 1.
SUMMER
Segment 1
Reach 1
Reach 2
Reach
Reach 4
GO Min
(mg/ 1) M i l epoi nt Reach #
3.51 17.00 4
W L A
CE•QG
(mg7 l )
60.00
0.00
60.00
0.00
WLA
N E: CMG
(m3/1)
81.00
0.00
90.00
0.00
w`0 wa:ste Flow
{mg/1} (m3d)
0.00
0.0
0.00
0.00
8.00000
.50000
(:. 00000

*** MODEL SUMMARY DATA . *
831
Receiving vi ng
CITY OF MORGANTOH Euream Clays. 0308I
Rece� �� ��g Strum CATAWEA RIVER
Sumer 7Q10 : 126.0 Winter 7'10 : 126.0
C si gn Temperature: 25.0
'LENGTH' SLOPE' VELOCITY 1 C'ERTH 1 Kd 1 Kd 1 Ka 1 Ka 1 KN i
KN j KNR 1 4R i tmi 1 fps 1 ft 1 d:si gn 1 10''0�' 1 design' b20° 'design'
420° 1de_igilm@20°.ile 1t/ i -
1 i 1
Segment 1 11 0.7011 1.001 0.437 1 4.60 1 0.26 1 0.21 1 0.43 1 0.381 0.44
0 .: 0 1 0.44 1 0 .0 0 1
Reach 1 1
i 1 1
•
Segment 1 1 1.301 1.001 0.565 1 4.90 j 0.27 1 0.21 1 0.55 i 0.501 0.44
0.30 j 0.44 1 0.00 1
Reach 2
1
Segmen 1 i1 5.0011 1.001 0.618 1 5.15 1 0.27 1 0.21 1 0.61 1 0.541 0.44
0.30 0,44 1 0.00
Reach 3 I I 1 1 1
Segm=n1 1 i (15.00
0.30 10.44 1 1 0.00
Reach 4
1.001 0.622 1 5.29 1 0.27 j 0.21 1 0.61 1 0.551 0.44
1 1 1 1 1 1 1
F1.ow
Segment 1 Loh 4 1
Waste
Tribufitc Headwaters 120.000
• Runott 0.000
Segment 1 Reacch020
Waste
Tributary 64.800
* ,Runotf 0.230
Segment 1 Reach 3
Waste 1 11.525
Tributary 27. 000
* Runotf 1.540
Segment 1 Reach0.04
Waste' 0.000
00
Tributary
• Runotf 1.540
I mgll 1 ng?� i 491 1
1 60.000 81.000 0.000
2.000 1.000 2.000 1.00077.44 0
0.000
2.000
2.00.0
62.000
2.000
0.000
2.000
2.000
* Runoff flow is in cfs/mil e
0.000
1.000
1.000
90.000
1.000
1.000
0.000
1.000
1.000
0.000
7.4140
7.440
0.000
7.440
7.440
0.000
7.440
7.440

SUMMER
Sect # I Reach # 1 Seq Hi I D.O. I CBOD I NEOG
fi 1 0.00 6.77 7.20 8.17
1 1 0.10 6.71 7.17 8.12
1 1 0.20 6.64 7.14 8.07
1 1 0.30 6.57 7.12 8.02
1 1 0.40 6.51 7.09 7.97
1 1 0.50 6.44 7.07 7.92
1 1 0.60 6.38 7.04 7.87
1 1 0.70 6.32 7.01 7.82
1 2 0.70 6.68 5.41 5.65
1 2 0-80 6.64 5.40 5.62
1 2 0.90 6.61 5.38 5.59
1 2 1.00 6.58 5.37 5.57
1 2 1.10 6.55 5.35 5.54
1 -2 1.20 6.52 5.34 5 .51
1 2 1.30 6.48 5.32 5.48
1 2 1.40 6.45 5.30 5.46
1 2 1.50 6.42 5.29 5.43
1 2 1.60 6.39 5.27 5.41
1 2 1.70 6.36 5:26 5.38
1 2 1.80 6.34 5.24 5.35
1 2 1.90 6.31 5.23 5.33
1 2 2.00 6.28 5.21 5.30
1 3 2.00 6.11 7.48 8.89
1 3 2.50 5.89 7.37 8.67
1 3 3.00 5.69 7.25 8.46
1 3 3.50 5.49 7.14 8.26
1 3 4.00 5.32 7.03 8.06
1 3 4.50 5.15 6.93 7.66
1 3 5.00 4.99 6.82 7.67
1 3 5.50 4.84 6.72 7.48
1 3 6.00 4.71 6.61 7.30
1 3 6.50 4.58 6.51 7.13
1 3 7.00 4.46 6.41 6.95
1 4 7.00 4.46 6.41 6.95
1 4 8.00 4.26 6.22 6.63
1 4 9.00 4.08 6.04 6.31
1 4 10.00 3.94 5.86 6.01
1 4 11.00 3.82 5.68 5.73
1 4 12.00 3.72 5.51 5.46
1 4 13.00 3.64 5.35 5.20
1 4 14.00 3.59 5.19 4.96
1 4 15.00 3.55 5.04 4.73
1 4 16.00 3.52
1 4 17.00 3.51 4.85 4.30
1 4 18.00 3.52 4.61 4.10
1 4 19.00 3.53 4.48 3.91
1 4 20.00 3.56 4.35 3.72
1 4 21.00 3.59 4.23 3.55
4.10 3.39
Seg # I Reach # I SegMiI 3.63. I CI N
{
Flow
138.40
138.40
138.40
138.40
138.40
138.40
138.40
203.20
203.22
203.25
203 .27
203.29
203.31
203.34
203.36
203.38
203.41
203.43
203.45
203.48
20S.50
242.12
242.89
243.66
244.43
245.20
245.97
246.74
247.51
248.28
249.05
249.82
249.82
251.36
2=2 9:0
254.44
255.98
257.52
259.06
260.60
262.14
263.68
265.22
266.76
268.30
269.84
271.38
272.92
Floe? I

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04/10/92 ver 3.1
Facility: TOWN OF VALDESE
NPDES Permit No.: NC0041696
Status (E, P, or M) : E
Permitted Flow: 7.5 mgd
Actual Average Flow: 3.8 mgd
Subbasin: '030831 c 1990 - i 1 'vox. Jaidy
Receiving Stream: LAKE RHODHISS
I ---------PRETREATMENT DATA -------------I- - FL EENT DATA-- 1--�
Stream Classification: WS-III 1 ACTUAL
PERMITTED( I
7Q10: 228.7 cfs I Ind. +
Ind. + (
Stn'd / FREQUENCY I
INC: 4.84 4 1 Domestic PERMITTED Domestic I OBSERVED of Chronic!
Pollutant AL Bkg I Removal Domestic Act.Ind. Total Industrial Total I Eflluent Criteria I
Conc. I Eff. Load Load
Load Load Load I Conc. Violations!
(ug/1) (ug/1) I 4 (#/d) (#/d) (#/d) (#/d)
(#/d) I (ug/1) ----- --- I
Cadmium S 2.0 ---- I __��_�
I 924 0.0 0.3 0.32 0.0 0.010 I 10.0
Chromium S 50.0 I 764 0.1 I
0.4 0.52 4.7 4.800 I 30.0
Copper AL 7.0 I 824 0.2I I
4.3 4.48 1.7 1.820 I 87.0
Nickel S 25.0 I N
I 324 0.1 1.6 1.70 0.0 0.050
Lead S 25.0 I 140.0 1 P
1 814 0.1 1.8 1.96 2.5 2.600 I 210.0
Zinc AL 50.0 1 774 0.4 ! U
4.1 4.54 16.6 17.080 I 120.0
Cyanide S 5.0 I 594 0.1 I T
0.2 0.27 0.0 0.100 I 17.0
Mercury S 0.012 I 864 0.0 0.0 0.00 I
Silver AL 0.06 0.0 0.000 I 1 S
I 944 0.0 0.2 0.25 0.2 0.170 1 Sulfates S 250.00 1 04 I E
0.0 0.00 I 842.0
Chloride S 250.00 1 04 1 C
Phenols S 1.0 I 724.0 I T
I 99%
NH3-N C 1 04 I 9,500.0 I I
T.R.Chlor.AL 17.0 I I 0
I 04
I I IN
I I I
I I I
I I
I--------------- ALLOWABLE PRDCT'D PRDCT'D PRDCT'D
---~MONITOR/LIMIT---- (--ADTN' L RECI�II�IDTN' S-- I I Effluent Effluent Effluent Instream
1 Conc. using using Conc. Based on Based on Based on I FREQUENCY INSTREAM I 1 Allowable CHRONIC ACTUAL PERMIT using
Pollutant I Load ACTUAL PERMITTED OBSERVED I Eff. Mon. Monitor. I
Criteria Influent Influent OBSERVED Influent Influent Effluent I based on Recomm'd ? I I (#/d) I
(ug/1) (ug/1) (ug/1) (ug/1) Loading Loading Data
I OBSERVED (YES/NO) I
Cadmium S ---------I --- --- I
I 31.60 41.346 0.819 0.026 0.48 Monitor
Chromium S ( 263.37 1033.656 3.978 36.812 1.45
I 49.16 Limit ! NCAC NO I A
Copper AL Monitor Monitor 1 NCAC NO I N
144.712 25.785 10.469 4.21 Monitor Monitor Monitor I Monthly NO
Nickel S ( 46.48 I 166.34 516.828 36.925 1.086 6.77 Monitor 1 A
Lead S Limit I NCAC NO I L
S16.828 11.892 15.786 10.16 Monitor Monitor Limit I NCAC NO
Zinc AL I 274.82 1033.656 33.366 125.533 5.80 IS
Monitor Monitor Monitor I Monthly NO 1 Y
Cyanide S 1 15.42 103.366 3.561 1.310 0.82 Monitor Monitor
Mercury S 1 0.11 0.248 0.010 0.000 0.00 Limit 1 NCAC NO 1 I
Monitor
Silver AL I 1.26 I I S
1.240 0.486 0.326 0.00 Monitor Monitor
Sulfates S I 316.05 5168.280 0.000 0.000 40.73 1 I
Chloride S I 316.05 5168.280 0.000 0.000 35.02 Limit I NCAC NO I R
Phenols S I 126.42 20.673 0.000 0.000 459.53 Limit ( NCAC NO I E
NH3-N C I 0.000 Limit I NCAC YES I S
0.00 T.R.Chlor.AL I 351.443 1 I U
0.00 1
IL
TOXICS REVIEW
I I IT
I 1 IS
I I

i
04/10/92 ver 3.1 TOXICS REVIEW
Facility: TOWN OF VALDESE
NPDES Permit No.: NC0041696
Status (E, P, or M) : E
Permitted Flow: 7.5 mgd
Actual Average Flow: 3.8 mqd 1qq( M414 ✓J'L
Subbasin: '030631
Receiving Stream: LAKE RHODHISS 1---------PRETREATMENT DATA--------------1----EFLLUENT DATA---- 1
Stream Classification: WS-III 1 ACTUAL PERMITTED! I
7010: 228.7 cfs I Ind. + Ind. + 1 FREQUENCY 1
IWC: 4.84 % I Domestic PERMITTED Domestic I OBSERVED of Chronic'
Stn'd / Bkq 1 Removal Domestic Act.Ind. Total Industrial Total I Eflluent Criteria 1
Pollutant AL Conc. I Eff. Load Load Load Load Load I Conc. Violations'
(uq/1) (ug/1) I 4 (#/d) (#/d) (#/d) (#/d) (#/d) 1 (uq/1) (#vio/#sam) 1
---------------- 1-------- -----w 1
Cadmium S 2.0 I 924 0.0 0.3 0.32 0.0 0.010 1 10.0 I
Chromium S 50.0 1 764 0.1 0.4 0.52 4.7 4.800 1 10.0 1 I
Copper AL 7.0 I 824 0.2 4.3 4.48 1.7 1.820 I 85.0 1 N
Nickel S 25.0 1 324 0.1 1.6 1.70 0.0 0.050 I 140.0 I P
Lead S 25.0 I 814 0.1 1.8 1.96 2.5 2.600 1 40.0 1 U
Zinc AL 50.0 I 774 0.4 4.1 4.54 16.6 17.080 1 80.0 I T
Cyanide S 5.0 I 591 0.1 0.2 0.27 0.0 0.100 1 15.0 I
Mercury S 0.012 1 864 0.0 0.0 0.00 0.0 0.000 1 I S
Silver AL 0.06 I 944 0.0 0.2 0.25 0.2 0.170 I I E
Sulfates S 250.00 I 04 0.0 0.00 I 842.0 1 C
Chloride S 250.00 1 04 1 724.0 1 T
Phenols S 1.0 I 99% I 76.0 I I
NH3-N C 1 04 1 1 0
T.R.Chlor.AL 17.0 I 04 1 1 N
I I I
I I I
I 1 1
I--------------- ALLOWABLE PRDCT'D PRDCT'D PRDCT'D---------MONITOR/LIMIT----- ---- I--ADTN'L RECMMDTN'S-- I
I Effluent Effluent Effluent Instream I Recomm'd
I
I Conc. using using Conc. Based on Based on Based on I FREQUENCY INSTREAM I
I Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED 1 Eff. Mon. Monitor. 1
Pollutant I Load Criteria Influent Influent OBSERVED Influent Influent Effluent 1 based on Recomm'd ? I
I (#/d) (uq/1) (ug/1) (ug/1) (ug/1) Loading Loading Data 1 OBSERVED (YES/NO) 1
--------- -- I ----- ---- ------ -- --I I
Cadmium 8 1 31.60 41.346 0.819 0.026 0.48 Monitor Limit I NCAC NO
Chromium S I 263.37 1033.656 3.978 36.812 0.48 Monitor I NCAC NO I N
Copper AL I 49.16 144.712 25.785 10.469 4.11 Monitor Monitor Monitor 1 Monthly NO I A
Nickel S I 46.48 516.828 36.925 1.086 6.77 Monitor Limit 1 NCAC NO I L
Lead S I 166.34 516.828 11.892 15.786 1.93 Monitor Monitor Monitor 1 NCAC NO I Y
Zinc AL I 274.82 1033.656 33.366 125.533 3.87 Monitor Monitor Monitor I Monthly NO I S
Cyanide S I 15.42 103.366 3.561 1.310 0.73 Monitor Monitor Limit I NCAC NO I I
Mercury S I 0.11 0.248 0.010 0.000 0.00 Monitor I I S
Silver AL I 1.26 1.240 0.486 0.326 0.00 Monitor Monitor I I
Sulfates S I 316.05 5168.280 0.000 0.000 40.73 Limit I NCAC NO ' R
Chloride S 1 316.05 5168.280 0.000 0.000 35.02 r.�.,,�* I NCAC NO I E
Phenols S I 126.42 20.673 0.000 0.000 3.68 I NCAC YES I S
NH3-N C 1 0.000 0.00 I / 'LI U
T.R.Chlor.AL I 351.443 0.00 I

North Carolina Division of Environmental Management
Water Quality Section / Intensive Survey Group
March 12, 1992
MEMORANDUM
To: Ruth Swanek
Through: Jay Sauber ,)c4
6.
From: Howard Bryant ORA
Subject: Long-term BOD Analysis forValdese WWTP
County: Burke
NPDES # NC0041696
Receiving Stream: Lake Rhodiss
Sub -basin: 030831
DAY BM NH3-N TKN-N NOX-NI-N.
0 0.11 1.8 1.20 3.0
5 2.65 0.13 2.4 1.30 3.7
10 4.77 0.07 3.0 1.40 4.4
15 6.10 0.05 1.6 1.60 3.2
20 7.12 0.06 1.5 1.60 3.1
25 7.98 0.01 1.4 1.50 2.9
30 8.68 0.59 1.4 1.70 3.1
35 9.44
40 9.90
50 11.18
60 12.46 0.06 1.5 1.70 3.2
70 13.90
80 15.51
90 16.85
100 17.77
110 18.48
120 19.11
130 19.67 0.02 1.0 2.50 3.5
Date Collected: October 9, 1991
0800-0800
Collected by: Reid
pH: 8.2
Test evaluation: excellent
Seeded: seeded
Note: Thirty day ammonia sample was analyzed beyond approved holding time.
cc: Central Files
Regional Water Quality Supervisor