NC0021504_More Information (Received)_20210330

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TOWN OF BISCOE
NPDES# NC0021504
2020 Pretreatment Annual Report Narrative - Corrected 3/25/21
GENERAL INFORMATION:
A. General Program Information:
1. Program Updates
• The Town's NPDES discharge permit expired in June of 2019. The
Town has received a draft permit and a request for more information
from the Municipal Unit. The information has been provided.
• An updated Enforcement Response Plan was prepared for the Town
and submitted to NCDEQ. The revision was approved by the Municipal
Unit on August 11, 2020.
• An updated Short Term Monitoring Plan was prepared for the Town
and submitted to NCDEQ on September 27, 2019, with additional
revisions submitted January 15th, 2020. The plan was approved by the
Municipal Unit on February 14th, 2020.
• The POTW conducted additional monitoring for effluent silver at a
0.0005 mg/L detection level as suggested by the Municipal Unit.
• The pretreatment program has requested the Town publish the SNC
announcement in the local newspaper. We are requesting an extension
to submit the affidavit of publication. The Town offices closed due to
COVID-19 for several weeks and will reopen on March 1st
2. Pretreatment Program Information Sheet.
• A pretreatment program sheet was provided by PERCS and it can be
found following this narrative. All items on the program sheet are
correct.
B. Industrial Users and Compliance Information.
1. Carolina Diary (IUP # 0001)
• This SIU performed all sampling and reporting as required, and was
inspected once and sampled twice by the POTW.
• The industry was issued 8 NOVs and 5 fines totaling $2650.00 during
2020.
• This SIU has had difficulty complying with its permit limits historically
and began upgrades to their pretreatment system in 2019. By mid-
2019, the industry was online with oxidation, ozonation, and MBBR
Town of Biscoe PAR Narrative 2020

pretreatment. To spite this, the BOD and TSS values could not be
maintained consistently. The industry continued to violate BOD permit
limits and periodically its TSS limits. The industry was in SNC for the
first half of 2020 for BOD and TSS. After consulting with the
Fayetteville Regional Office, the Town placed the industry on a
compliance schedule in June of 2020. A copy of the compliance
scheduled is included in this report as Attachment A.
• The industry consulted with ProChem during the term of the
compliance schedule. Multiple issues with the pretreatment system
were identified and addressed, including adding different polymers and
coagulants to control the TSS, addition of more bacteria,
micronutrients and supplemental nitrogen to the MBBR, moving the pH
adjustment from the frac tank to the head of the DAF unit, and
upgrading undersized pumps and valves.
• At the industry's request, the compliance schedule was extended until
March 15th of 2021, as the industry needed additional time to
complete all of the pump and valve upgrades.
• The BOD and TSS values for the industry have shown significant
improvement after September of 2020.
2. Grede II, AAM Castings (IUP # 0002)
• This CIU was inspected once and sampled twice by the Town.
• The industry conducted all sampling as required under their IUP.
• Due to an apparent overallocation on silver in the Town's approved
headworks analysis, the Town was uncertain as how to proceed on
numeric limits for this IUP. The Fayetteville Regional Office was
consulted. It was suggested that the POTW conduct additional
monitoring for silver at a lower detection level. This was done, and the
results are provided in Appendix B of this report.
• Proposed numeric limits for this CIU are included in the second AT
copy included with this report.
C. Dental Amalgam Compliance Report Information
• Dental amalgam compliance reports were sent to two identified
potential dental dischargers is 2020.
• The Town did not receive either compliance report back. The Town
requests an extension to April 15th, 2021 to complete the necessary
follow up to obtain responses.
Town of Biscoe PAR Narrative 2020

Pretreatment Annual Report (PAR)
Industrial Data Summary Form (IDSF)
Use separate forms for each industry/pipe
Enter BDL values as < (value)
AVERAGES CALCULATED USING ALL INDUSTRY AND POTW
VALUES.
Total # of samples =>
Maximum (mg/I) _>
or Maximum (Ib/d) =>
or Average (mg/I) =>
or Average Loading (Ib/d) =>
# Violations/ #TRC =>
% vi olati ons,(chronic SNC is>= 66%) =>
% TRC violations, (SNC is >= 33 %) =>
Total # of samples =>
Maximum (mg/I) =>
or Maximum (Ib/d) =>
or Average (mg/I) =>
or Average Loading (Ib/d) =>
#Violations / # TRC =>
% vi of ati ons, (chroni c SNC is >= 66%) =>
% TRC violations, (SNC is >= 33 %) =>
Total # of samples=>
Maximum (mg/I) =>
or Maximum (lb/d) =>
or Average (mg/I) =>
or Average Loading (Ib/d) =>
#Violations / # TRC =>
% vi olati ons,(chronic SNC is>= 66%) _>
% TRC violations, (SNC is >= 33 %) =>
Control Authority,
Town Name=> Town of Biscoe
WWTP Name=> Town of Biscoe WWTP
NPDES#=> NC0021504
1st 6 months, dates=> 1/1/2020 6/30/2020
2nd 6 months, dates=> 7/1/2020
12/31/2020
Industry
Name AAM Castings
IUP# 002
Ripe# 001
Corrected 3/25/21
Flow, Daily Max, MGD
BOD, Daily Max
TSS, Daily Max
BOD, Monthly Avg.
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
33
85
3
3
3
3
3
2
0.001
0.027
21
11.6
5.7
43.4
21
11.6
0.001
0.001
9
5.2
4.3
16.1
9
6.8
0
0
0/0
0/0
0/0
0/0
0/0
0/0
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Flow, Mo. Avg. MGD
TSS, Monthly Avg.
pH, S.U., Daily Max
Temperature, °F, Daily
Max
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
5
5
3
2
3
3
4
8
0.003
0.005
5.7
43
Max=7.9
Max=8.9
80
82
Min=7.8
Min=7.8
0.001
0.001
4.3
23
72
66
0
0
0/0
0/0
0
0
N/A
N/A
0%
0%
0%
0%
0%
0%
N/A
N/A
0%
0%
0%
0%
N/A
N/A
N/A
N/A
Cadmium, Daily Max
Chromium, Daily Max
Copper, Daily Max
Cyanide, Daily Max
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
3
3
3
3
3
3
3
3
<0.002
<0.001
0.013
<0.005
0.056
0.1
<0.008
0.01
<0.001
<0.001
0.006
<0.005
0.026
0.038
<0.007
0.008
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
* POTW must alter at least one of these
four rows, Please indicate how averages were calculated
Avg period could be month, Qtr, or 6-month & if BDL , 1/2BDL, or zero values used.
BDL => Below Detection Limit
IUP=> Industrial User Permit
SNC => Significant Non -Compliance
TRC => Technical Review Criteria
mq/I => milligrams per liter
Ib/d => pounds per days
mod => million gallons per day
WWTP => wastewater treatment plant
I DSF IUP 0002 AAM Castings 2020 Corrected 3/25/21

Pretreatment Annual Report (PAR)
Industrial Data Summary Form (IDSF)
Use separate forms for each industry/pipe
Enter BDL values as < (value)
Total # of samples =>
Maximum (mg/I) =>
or Maximum (Ib/d) =>
or Average (mg/I) =>
or Average Loading (Ib/d) =>
#Violations / #TRC =>
% vi olati ons,(chronic SNC is>= 66%) =>
% TRC violations, (SNC is >= 33 %) =>
Total # of samples =>
Maximum (mg/I) _>
or Maximum (Ib/d) =>
or Average (mg/I) _>
or Average Loading (Ib/d) =>
#Violations / # TRC =>
% vi of ati ons, (chroni c SNC is >= 66%) =>
% TRC violations, (SNC is >= 33 %) =>
Total # of samples=>
Maximum (mg/I) =>
or Maximum (lb/d) _>
or Average (mg/I) =>
or Average Loading (Ib/d) _>
#Violations / # TRC =>
% vi olati ons,(chroni c SNC is>= 66%) _>
% TRC violations, (SNC is >= 33 %) =>
* POTW must enter at least one of these
four rows, Please indicate how averages were calculated
Avg period could be month, Qtr, or 6-month & if BDL , 1/2BDL, or zero values used.
Industry Name AAM Castings
IUP# 002
Pipe # 001
Lead, Daily Max
Nickel, Daily Max
Silver, Daily Max
Zinc, Daily Max
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
3
3
3
3
3
3
3
3
<0.01
<0.005
0.019
0.016
<0.005
0.016
0.264
0.480
<0.007
<0.004
0.012
0.007
<0.005
0.006
0.134
0.199
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Mercury, Daily Max
TTO, Daily Max
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
3
3
certification
_
certification
<0.0002
<0.0002
POTW =
POTW =
<0.0002
<0.0002
<2.13
<2.13
N/A
N/A
N/A
N/A
N/A
N/A
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
BDL => Below Detection Limit
IUP=> Industrial User Permit
SNC => Significant Non -Compliance
TRC => Technical Review Criteria
m4/I => milligrams per liter
I b/d => pounds per day
mad => million gallons per day
W WTP => wastewater treatment plait
I DSF IUP 0002 AAM Castings 2020 Corrected 3/25/21

Pretreatment Annual Report (PAR)
Industrial Data Summary Form (IDSF)
Use separate forms for each industry/pipe
Enter BDL values as < (value)
AVERAGES CALCULATED USING ALL INDUSTRY AND
POTW VALUES.
Control Authority, Industry
Town Name=> Town of Biscoe
W WTP Name => Town of Bi scoe W WTP
NPDES#=> NC0021504
1st 6 months, dates=> 1/1/2020
6/30/2020
2nd 6 months, dates => 7/1/2020
12/31/2020
Name Carolina Dairy
IUP# 001
Rpe# 001
Corrected 3/25/21
Total # of samples =>
Maximum (mg/1) =>
or Maximum (Ib/d) =>
or Average (mg/1) =>
or Average Loading (Ib/d) =>
#Violations / #TRC =>
% violations,(chronic SNC is >= 66%) _>
% TRC violations, (SNC is>= 33 %) _>
Total # of samples =>
Maximum (mg/1) =>
or Maximum (Ib/d) =>
or Average (mg/1) =>
or Average Loading (Ib/d) =>
#Violations / # TRC =>
% violations,(chronic SNC is >= 66%) _>
% TRC violations, (SNC is>= 33 %) _>
Total # of samples =>
Maximum (mg/1) =>
or Maximum (Ib/d) =>
or Average (mg/I)=>
or Average Loading (Ib/d) =>
#Violations / # TRC =>
% violations,(chronic SNC is >= 66%) =>
% TRC violations, (SNC is>= 33 %) =>
Flow, Daily Max,
MGD
Flow, Mo Avg. MGD
pH, S.U.
BOD, M o. Avg., mg/L only
applied until June
compliance schedule
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months 2nd 6 months
1st 6 months
141
168
6
6
12
24
5
0.095
0.125
0.055
0.073
Max=9.7
Max=9.1
527
Min=6.0
Min=7.1
0.047
0.057
0.047
0.058
639
0
0
0
0
TSS, Daily Max, mg/L
1st 6 months
2nd 6 months
TSS, M o. Avg., mg/L only
applied until June compliance
schedule
1st 6 months
2nd 6 months
1/NA
8%
NA
0/NA
0%
NA
4/4
80%
80%
Oil & Grease, Daily Max,
mg/L
1st 6 months
2nd 6 months
2nd 6 months
Mo. Avg. Temp, °F
1st 6 months
2nd 6 months
11
23
5
11
21
6
6
740
1990
366
42
24
87
90
323
452
256
18
9
61
79
3/3
5/NA*
4/1
3/0
0
0
0
27%
22%
80%
27%
0%
0%
0%
27%
NA*
20%
0%
0%
0%
0%
*On compliance schedule
Daily Temp. Max, °F
BOD, Daily Max, mg/L
During Compliance Schedule
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
1st 6 months
2nd 6 months
8
20
4
23
90
91
672
1500
80
77
1390
403
0
0
1/NA*
1/NA*
0%
0%
25%
3%
0%
0%
NA*
NA*
* POTW must enter at least one of these
four rows, Please indicate how averages were calculated
Avg period could be month, Qtr, or 6-month & if BDL , 1/2BDL, or zero values used.
* On compliance schedule
BDL => Below Detection Limit
IUP=> Industrial Use Permit
SNC => Significant Non -Compliance
TRC => Technical Review Criteria
mNl => milligrams per liter
lb/d => pounds pa day
ntgd => million gallons per day
W WTP => wastewater treatment plant
I DSF IUP 0001 Carolina Dairy 2020 Corrected 3/25/21

Pretreatment Annual Report (PAR)
Significant Non -Compliance Report (SNCR)
WWTP = Wastewater Treatment Plant, use separate form for each WWT
SIU = Significant Industrial User
SNC = Significant Non -Compliance
P.
PAR covers this calendar year =>
Control Authority=Program=Town Name =>
WWTP Name =>
NPDES# =>
Corrected 3/25/21
A SNCR Form must be submitted with every PAR, please write "None"
if you had No S Us in SNC during calendar year
i UP
#
Pipe
#
I ndustry Name
Parameter
or "Reporting"
SNC? (Yes/No)
for each 6-month period.
Jan. - June
July - Dec.
0001
001
Carolina Dairy
BOD and TSS
Yes
on compliance schedule
0002
001
GredeII, AAM Castings
None
No
No
Attach a copy of the Division's "SI Us in SNC Historical Report" for your POTW's SI Us behind this page .
I s the database correct ? Notify the Division of any errors ! Database indicates SNC history for previous years.
EVERY SNC MUST be explained in the Narrative, How was, is, or will it beresolved?
REPEAT SNCs are serious matters that MUST be explained in the Narrative.
PAR,SNCR, Biscoe2020
2020
Town of Biscoe
Biscoe WWTP
NC0021504