NC0032131_202103VRR_20210510

DMR REVIEW RECORD
Winston-Salem Regional Office
Facility Name: Tweetsie Railroad Permit Number: NCO032131
Report Period: March 2021 Prior Assessments: 2 Enforcement Factor: 1.00
Waterbody
Outfall # Outfall Description Waterbody Name Classification
001 Effluent to Middle Fork S Fork New River Middle Fork South Fork New River WS-IV;Tr:+
Daily Limit Violations
Sample Location: Outfall 001 - Effluent
Violation Unit of Limit Calculated % Over
Date Parameter Frequency Measure Value Value Limit Action
3/2/2021 Chlorine, Total Residual 2 X week ug/I 17 28 64.7 No Action, BPJ
3/23/2021 Solids, Total Suspended - Weekly mg/I 15 15.50 3.3
Concentration
Other Violations/Staff Remarks:
Reviewed DMR for March 2021. ORC stated, "Exceeded daily TSS limit of 15.0 mg/L with a 15.5 mg/L on 3/23/2021. Little or
no incoming flow for food is hard to keep biological growth. We have fed plant dog food to help." (Their monthly average limit
is 10 mg/L and the monthly average reported is 5.66 mg/L). In the past 12 months the permittee has received NOVs (with
CPAs) pertaining to 2 daily and 1 monthly `limit exceeded' concerning TSS. Looking through files located on the G drive, a letter
was sent from Robert Barr with RPB Systems in response to NOV-2021-LV-0087. The letter stated, "We have investigated the
issue and found the issues with the BOD and TSS levels were due to very low flows not able to sustain biological grown to treat
waste loadings. The facility had closings and partial openings due to Covid19. This resulted in a lack of biological growth and
food sources." The only remedy documented to counter TSS issues is feeding the plant dog food. Honestly, unsure on how to
proceed. Yes, this is a repeated violation, however they did not exceed monthly average limit and the calculated value was 3%
over limit. My questions are...1) how much dog food is going into system? 2) and with most dog food having high fat content,
will it affect oil and grease levels, potentially creating another problem (maybe rabbit food a better alternative)?
Supervisor Remarks:
Jenny - NOD
LON-NOD
Completed by: Tricia Lowery Date: 5/10/2021
Assistant Regional
Supervisor Sign -off: Jenny Graznak Date: 5/25/2021
Regional
Supervisor Sign -off: LTS Date: 5/27/2021

Prior 12-Month Enforcement Histor
Permit Number: NC0032131
Report Period: March 2021
Limit Violation
Sample Location:
Outfall 001 - Effluent
Violation
Report
Violation
Date
Period
Parameter
Type
NOD NOV
CPA
10/20/2020
10-2020
Solids, Total Suspended -
Daily Maximum
NOV-2021-LV-0087
LV-2021-0111
Concentration
Exceeded
10/29/2020
10-2020
BOD, 5-Day (20 Deg. C) -
Daily Maximum
NOV-2021-LV-0087
LV-2021-0111
Concentration
Exceeded
10/29/2020
10-2020
Solids, Total Suspended -
Daily Maximum
NOV-2021-LV-0087
LV-2021-0111
Concentration
Exceeded
10/31/2020
10-2020
BOD, 5-Day (20 Deg. C) -
Monthly Average
NOV-2021-LV-0087
LV-2021-0111
Concentration
Exceeded
10/31/2020
10-2020
Solids, Total Suspended -
Monthly Average
NOV-2021-LV-0087
LV-2021-0111
Concentration
Exceeded
4/14/2020
4-2020
BOD, 5-Day (20 Deg. C) -
Daily Maximum
NOV-2020-LV-0486
LV-2020-0270
Concentration
Exceeded
4/21/2020
4-2020
BOD, 5-Day (20 Deg. C) -
Daily Maximum
NOV-2020-LV-0486
LV-2020-0270
Concentration
Exceeded
4/30/2020
4-2020
BOD, 5-Day (20 Deg. C) -
Monthly Average
NOV-2020-LV-0486
LV-2020-0270
Concentration
Exceeded