NCS000096_MONITORING INFO_20090831

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STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
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DOC TYPE
❑ HISTORICAL FILE
L-� MONITORING REPORTS
DOC DATE
❑ JL,) 0 D 3 /
YYYYMMDD

Chemeta// Foote Corp,
August 31, 2009
SW INDIVIDUAL PERMIT COVERAGE RENEWAL
STORMWATER PERMITTING UNIT -
1617 MAIL SERVICE CENTER
Raleigh, North Carolina 27699-1617
ATTN: Mr. Brian Lowther
Ref.; NPDES STORMWATER PERMIT RENEWAL
CHEMETALL FOOTE CORP.
PERMIT NUMBER NCS000096
CLEVELAND COUNTY
Dear Mr. Lowther:
On reviewing the Draft Permit, 1 have some comments.
1. The new requirement for analyzing and reporting n-hexane is a concern since it is unlikely that n-
hexane would be present in KM's Stormwater Discharge.
• The largest container of hexane on site is only 500 gallons, so the greatest potential spill would be
that quantity.
• The hexane transfers are performed within containment.
• Hexane is very volatile, and quickly evaporates. A spill outside of containment would evaporate
within 30 minutes or an hour, so it is unlikely that there would be hexane residues from spills present
in stormwater.
• While n-hexane is a VOC and has issues relating to air releases, the best information I have at this
time does not indicate it is a significant issue with respect to releases to water.
The stormwater sample would have to be sent to a qualified laboratory for analysis, an added cost to
the facility.
2. The new requirement for analyzing and reporting oil and grease also requires that a sample be sent off
site for analysis. The largest tanks of oil on site is 500 gallons, and these are all within secondary
containment. The site has an active SPCC plan and program to verify the integrity of vessels of oil and
their containments.
We would appreciate your consideration in reviewing these two comments.
If there are any questions, please call me at 704-734-2698or by e-mail at ralph.hawk(o)chemetall.com
Thank you for your consideration.
Ralph Hawk
Sr. Process Engineer.
Chemetall Foote Corporation • 348 Holiday Inn Drive • Kings Mountain, North Carolina 28086
Telephone [phone] • Fax [phone]

10. State the method of reclaimin sediment and/or stilling basins. _ %�/ c.i,r zfi/`��
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11. (a) Will excavation extend below the water table? (Yes or No) �ys
(b) Specify how dewatering during excavation will be accomplished. Include any proposed
stilling basins on the map. Construction details and calculations must be approved on the
map. Construction details and c Iculations must be provided for stilling basins or Type A silt
basins. Gt% <ir i )/'// A o roy4e _ / � . ,-Z n, _ J_
(c) If water is to be left in the pit after completion, state the estimated depth of permanent
water. State how this information was obtained. The data should include the high and low
water table depths. (Note: water table depths are available from the Soil Conservation
Service.) �� m y G /0 /" O/v4- �n "— 'Z
12. Describe the proposed schedule of permanent seeding and mulching. Include any proposed
reforestation, oi� (�'W- 4" ��� y� o6�v—
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13. Sienatures: �agg�c�cme�nt)
(a) Contractor:,n(Must be signed by a person authori . d t sign a` up men
(b) All owners of record: /
Witness Owners
Approved: ( Date:
ResideV Engineer
Exceptions: SEE AT--rACf-ll=d) LF-'flI)ATF_Jj 1-2-7-Oy--
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Initials of Exceptions: o
Contractor;7f.Jt.
Property Owner(s): fit/
Attachment: Site Map