NC0020621_HEADWORKS ANALYSIS_19890122

NPDES DOCYNENT SCANNING COVER SHEET
NPDES Permit: NC0020621
Boone WWTP
Document Type: Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Headworks Analysis
201 Facilities Plan
Instream Assessment (6713)
Environmental Assessment (EA)
Permit
History
Document Date: January 22, 1989
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PRETREATMENT HEADWORKS REVIEW
-----------------------------
�rri0 2aG2(7
Discharger: BOONE-(_PRQPOSED=STANDARDS) 01/22/89
Receiving stream: SOUTH FORK NEW RIVER
Stream Class : C
USGS Zone : 1
7Q10 : 23:1.00=cfs:7 ,,Lo - �-
Design flow: 3_-.2.00-mgd7
Actual flow: 2 . 1 mgdos Z7
Percent industrial : 4 . 8 %
IWC: 2.7:.75::%
Actual
Allowable Domestic Industrial
Pollutant Standard/AL Removal
Eff .
(mg/1) ( lbs/day) ( lbs/day) ( lbs/day)
-----------
Cadmium 0 . 002 S 920 2 . 20 0 . 040 0 . 510
Chromium 0 .05 S 76% 18 . 36 0 . 040 0 . 588
Copper 0 . 007 AL 59% 1 . 50 0 . 780 0 . 588
Nickel 0 . 088 S 9% 8 . 52 0 . 080 1 . 763
Lead 0 . 003 S 81% 1 . 39 0 . 400 0 . 843
Zinc 0 . 05 AL 83% 25 . 92 6 . 020 0 . 784
1 . 07 0 . 650 0 . 196
Cyanide 0 . 01 S 5 % 0 . 01 0 . 000 0 . 000
Mercury 0 . 00002 S 86
Silver
0 . 00006 AL 94% 0 . 09 0 . 080 0 . 470
Total Predicted Allowable Obs .
Influent Background Effluent Effluent Max
Load Reserve Conc conc (b) Conc ( c)
( lbs/day) ( lbs/day) (mg/1) (mg/1) _-(mg/1 ) -(mg/11
--------- --------- --------- --- -
0 . 55 1 . 65 0 0-0.0.25=> 0 . 0073
Cadmium 0 �0::_0086 0 . 1821 <0 . 02b
Chromium 0 . 63 17 . 74
Copper 1 . 37 0 . 14 0 ;0.0320=,> 0 . 0255 0 . 04
Nickel 1 . 84 6 . 68 0 0,-0.9:5:L > 0 . 3204 0 . 0s
Lead 1 . 24 0 . 15 0 D-0.13'5t > 0 . 0109 0 . 4
Zinc 6 . 80 19 . 12 0 0.0660 > 0 . 1821 0 . 06
Cyanide 0 . 85 0 . 23 0 -0 190 0 . 0182
Mercury 0 . 00 0 . 01 0 0 . 0000 0 . 0000
Silver 0 . 55 -0 . 46 0 0 . 0019; > 0 . 0002

PRETREATMENT HEADWORKS REVIEW
-----------------------------
Discharger: BOONE:(-P Vr S&H=STANDARDS) 01/22/89
Receiving stream: SOUTH FORK NEW RIVER
Stream Class : C
USGS Zone : 1
7Q10 : 13 . 100 Cfs
Design flow: 3 . 200 mgd
Actual flow: 2 . 1 mgd
Percent industrial : 4 . 8 %
IWC: 27 . 5 %
Actual
Allowable Domestic Industrial
Pollutant Standard/AL Removal
Eff .
(mg/1) ( lbs/day) ( lbs/day) ( lbs/day)
----------- -------
Cadmium 0 . 002 S 920 2 . 20 0 . 040 0 . 510
Chromium 0 . 05 S 76% 18 . 36 0 . 040 0 . 588
Copper 0 . 015 AL 59% 3 . 22 0 . 780 0 . 588
Nickel 0 . 05 S 9% 4 . 84 0 . 080 1 . 763
Lead 0 . 025 S 81% 11 . 60 0 . 400 0 . 843
Zinc 0 . 05 AL 83% 25 . 92 6 . 020 0 . 784
Cyanide 0 . 005 S 59% 1 . 07 0 . 650 0 . 196
Mercury 0 . 0002 S' 86% 0 . 13 0 . 00 0 . 470
8
Silver 0 . 01 AL 94% 14 . 69 0 . 00 0 . 0
Total Predicted Allowable Obs .
Influent Background Effluent Effluent Max
Load Reserve Conc Conc (b) Conc (c)
( lbs/day) ( lbs/day) (mg/1) (mg/1) --(mg/1) -(mg/1 ) _
-------- ------
Cadmium 0 . 55 1 . 65 0 Ozr-0.02 51 > 0 . 0073
Chromium 0 . 63 17 . 74 0 0 . 0086�1 0 . 1821 <0 . 02C
Copper 1 . 37 1 . 86 0 0. 03203 > 0 . 0546 0 . 04
Nickel 1 . 84 3 . 00 0 0::09'5'3) > 0 . 1821 0 . 05
Lead 1 . 24 10 . 36 0 0-01-35 > 0 . 0910 0 . 1
Zinc 6 . 80 19 . 12 0 0 . 0660- > 0 . 1821 0 . 06
Cyanide 0 . 85 0 . 23 0 0-019.8> > 0 . 0182
Mercury 0 . 00 0 . 13 0 0 . 0000 0 . 0007
Silver 0 . 55 14 . 14 0 0 . 0019-% 0 . 0364