NCS000531_DMR_20200917

STORM WATER DISCHARGE OUTFALL(SDO)
MONITORING REPORT
Permit Number: NCS S000531 or SAMPLES COLLECTED DURING CALENDAR YEAR: 2020
Certificate of Coverage Number: NCG (This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
FACILITY NAME STI Polymer COUNTY Lee
PERSON COLLECTING SAMPLE(S)Duncklee&Dunham,Devan Bailey PHONE NO.[phone]
CERTIFIED LABORATORY(S) ESC Lab Sciences Lab# ENV375
SIGNATURE OF PERMITTEE OR DESIGNEE
REOUIRED ON PAGE 2.
Part A: Specific Monitoring Requirements
Outfall Date 50050 1.5 9.0 96 6-9 100
No. Sample Total Total Styrene Vinyl Acetate Methyl pH COD
Collected Flow(if app.) Rainfall methacrylate
mo/dd/yr MG inches mg/L mg/L mg/L mg/L
Benchmark 1.5 9.0 96 6-9 100
OF-01 09/17/20 0.98 <0.000118 <0.000692 <0.0052 8.57 <11.7
J indicates the report value is an estimate; identification of the analyte is acceptable according to laboratory
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month?_yes X no
(if yes,complete Part B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
Outfall Date 50050 00556 00530 00400
No. Sample Total Flow Total Rainfall Oil&Grease Non-polar Total pH New Motor Oil
Collected (if applicable) (if appl.) O&G/TPH Suspended Usage
(Method 1664 Solids
SGT-HEM),if
appl.
mo/dd/yr MG inches mg/I mg/1 Units gal/mo
Form SWU-246,last revised 2/2/2012
Page 1 of 2

STORM EVENT CHARACTERISTICS: Mail Original and one copy to:
Division of Energy,Minerals,and Land Resources
Date: 09/17/20 Attn: Central Files
Total Event Precipitation(inches): 0.98 1612 Mail Service Center
Event Duration(hours): (only if applicable—see permit.) Raleigh,North Carolina 27699-1612
(if more than one storm event was sampled)
Date
Total Event Precipitation(inches):
Event Duration(hours): (only if applicable—see permit.)
"I certify,under penalty of law,that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system,or those persons directly responsible for gathering the information,the information submitted is,to the
best of my knowledge and belief,true,accurate,and complete. I am aware that there are significant penalties for submitting false information,
includ' e possibility o es and imprisonment for knowing violations."
s
(Signatur of Permittee) (Date)
Form SWU-246,last revised 2/2/2012
Page 2 of 2

f nvironmenlal
Quality
Stormwater Discharge Outfall (SDO)
Qualitative Monitoring Report
For guidance on filling out this form,please visit https://deq.nc.gov/about/divisions/energy-mineral-land-resources/
npdes-stormwater-gps
Permit No.: N/C/0 /0 /0 /5 /3 /3 / I / or Certificate of Coverage No.: N/C/G/ / / / / / /
Facility Name: STI Pol mer
County: Lee Phone No.
Inspector: Devan Haile
Date of Inspection: 05/19/2020
Time of Inspection: 10:15 a.m.
Total Event Precipitation (inches):• 0.98"
All permits require qualitative monitoring to be performed during a"measurable storm event."
A "measurable storm event" is a storm event that results in an actual discharge from the permitted site
outfall. The previous measurable storm event must have been at least 72 hours prior. The 72-hour storm
interval does not apply if the permittee is able to document that a shorter interval is representative for local
storm events during the sampling period, and the permittee obtains approval from the local DEMLR
Regional Office.
By this signature, I certify that this report is accurate and complete to the best of my knowledge:
(Signature of Permittee or Designee)
1. Outfall Description:
Outfall No. OF-2 Structure(pipe, ditch, etc.): concrete culvert to creek
Receiving Stream:
Little Buffalo Creek
Describe the industrial activities that occur within the outfall drainage area: vehicle arkin
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SWU-242,Last modified 06/01/2018

2. Color: Describe the color of the discharge using basic colors(red, brown,blue,etc.)and tint
(light, medium, dark)as descriptors: light greenish
3. Odor: Describe any distinct odors that the discharge may have(i.e., smells strongly of oil, weak
chlorine odor,etc.): weak/non-distinct odor
4. Clarity: Choose the number which best describes the clarity of the discharge,where 1 is clear
and 5 is very cloudy:
1 2 3 4 5
5. Floating Solids: Choose the number which best describes the amount of floating solids in the
stormwater discharge,where 1 is no solids and 5 is the surface covered with floating solids:
1 2 3 4 5
6. Suspended Solids: Choose the number which best describes the amount of suspended solids in
the stormwater discharge, where 1 is no solids and 5 is extremely muddy:
1 2 3 4 5
7. Is there any foam in the stormwater discharge? NO
8. Is there an oil sheen in the stormwater discharge? NO
9. Is there evidence of erosion or deposition at the outfall? NO
10. Other Obvious Indicators of Stormwater Pollution:
List and describe
Note: Low clarity, high solids,and/or the presence of foam,oil sheen,or erosion/deposition may be
indicative of pollutant exposure. These conditions warrant further investigation.
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SWU-242,Last modified 06/01/2018

1
a
RECEIVED
Environmental
Quality OCT 28 2020
Stormwater Discharge Outfall (SDO)
DENR-LAND QUALITY
Qualitative Monitoring Report STORMWATER PERMITTING
For guidance on.filling out this form,please visit https://deq.nc.gov/about/divisions/energy-mineral-land-resources/
npdes-stormwater-gps
Permit No.: N/C/0 /0 /0 /5 /3 /3 / 1 / or Certificate of Coverage No.: N/C/G/ / / / / / /
Facility Name: STI Polymer
County: Lee Phone No.
Inspector: Devan Hailey
Date of Inspection: 09/17/2020
Time of Inspection: 10:45 a.m.
Total Event Precipitation (inches): 0.24"
All permits require qualitative monitoring to be performed during a"measurable storm event."
A "measurable storm event" is a storm event that results in an actual discharge from the permitted site
outfall. The previous measurable storm event must have been at least 72 hours prior. The 72-hour storm
interval does not apply if the permittee is able to document that a shorter interval is representative for local
storm events during the sampling period, and the permittee obtains approval from the local DEMLR
Regional Office.
By this signature, I certify that this report is accurate and complete to the best of my knowledge:
(Signature of Ppt`mittee or Designee)
1. Outfall Description:
Outfall No. OF-1 Structure(pipe, ditch,etc.): plastic pipe to vegetated ditch
Receiving Stream:
Little Buffalo Creek
Describe the industrial activities that occur within the outfall drainage area: bulk storage and unloading of
raw chemicals, chemical ASTs, waste material pallets
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SWU-242,Last modified 06/01/2018
2. Color: Describe the color of the discharge using basic colors(red,brown, blue, etc.)and tint
(light,.medium, dark)as descriptors: clear/light grey
3. Odor: Describe any distinct odors that the discharge may have(i.e., smells strongly of oil, weak
chlorine odor, etc.): non-distinct
4. Clarity: Choose the number which best describes the clarity of the discharge, where 1 is clear
and 5 is very cloudy:
0 2 3 4 5
5. Floating Solids: Choose the number which best describes the amount of floating solids in the
stormwater discharge, where 1 is no solids and 5 is the surface covered with floating solids:
1 0 3 4 5
6. Suspended Solids: Choose the number which best describes the amount of suspended solids in
the stormwater discharge,where 1 is no solids and 5 is extremely muddy:
0 2 3 4 5
7. Is there any foam in the stormwater discharge? NO
8. Is there an oil sheen in the stormwater discharge? NO
9. Is there evidence of erosion or deposition at the outfall? NO
10. Other Obvious Indicators of Stormwater Pollution:
List and describe
H: 8.57 Tem :26.8 °C
Note: Low clarity,high solids,and/or the presence of foam,oil sheen,or erosion/deposition may be
indicative of pollutant exposure. These conditions warrant further investigation.
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SWU-242,Last modified 06/01/2018