NC0003760_20180328_Schedule of Compliance

DuPont Kinston Plant
4693 Hwy 11 North
Grafton,NC 28530
March 21, 2018
CERTIFIED MAIL: 7013 1090 0002 1600 1856
RETURN RECEIPT REQUESTED RECEIVE®/DENR DWR
NC Division of Water Resources MAR 28 2018
NPDES Complex Permitting Unit
Water Resources
1617 Mail Service Center Permitting Section
Raleigh,NC 27699-1617
Re: Permit No.NC0003760: A. (13) Schedule of Compliance Total Copper, Total Lead, Total Silver,
and Total Zinc Outfalls 002 & 003 Year 1 Summary Report.
The following questions were addressed during the first year of the 5-year compliance schedule.
1 Discuss procedures with contracted lab to ensure elimination of potential contamination
sources• The Kinston Site has a long-standing relationship with a local certified environmental
lab. The lab has established QC procedures, methodology, and equipment for good laboratory
practices. The DuPont Plant Waste Water Treatment lab is a certified lab for field test
parameters and operated by our certified ORC and backup. The independent lab issues all our
sample collection kits and coolers and the chain of custody is maintained throughout the
process.
2 Examine basic sampling handling processes (field sampling, laboratory handling and
analysis) All lab sample bottles come prepackaged and ready for field use from the
independent lab. The plant uses refrigerated composite samplers. The samplers use the R-3603
Tygon tubing, which is changed out quarterly. Replaceable liners are used inside the carboys.
For the additional investigative sampling of outfalls 002/003, both certified operators worked
together to prevent any issues with sample handling and contamination.
3. Examine sampling equipment cleaning procedures (jugs/bottles/samplers/strainers/reagent
quality) For the refrigerated composite samples, the carboy has replaceable liners. The dippers
also use a replaceable liner and is changed out for each sample. A portable Manning 250
peristaltic pump sampler is also used(as needed) for additional samples along the route of the
outfall. These pumps use the R-3603 Tygon tubing also. Dipped samples are collected directly
into the prepackaged sample bottles. No intermediate container is used. All samples are
packed in ice and delivered directly to the independent lab for analysis.
4. Ensure that sampling personnel are non-smokers. The DuPont Plant is a tobacco free site.
The use of Tobacco products (cigarettes, cigars,pipes, chewing tobacco, snuff, electronic
cigarettes, etc.) is prohibited by Dupont employees, and contractors performing work for
Dupont, on the Kinston site, including roads and parking lot(inside and outside of the fenced
area) and inside Company owned, rented, or leased vehicles. (Sorona Safety Manual Section 2,
Item 200, Rules: #2)
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The DuPont Plant is actively removing obsolete equipment, buildings, cooling towers, and above
ground storage tanks to improve the site and areas that may have impact to the outfalls. As mentioned
above, additional samples are being collected to study the overall condition of outfalls 002/003 to have
enough sample data to determine if further actions are needed to achieve compliance with the new
limits.
If you have any questions,please contact Jon Carpenter, Environmental Manager at 252-522-6255 or
Jeff White, ORC at 252-522-6120
Sincerely,
A ,),O,
George e akis
Plant Manager
DuPont Kinston Plant
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