NC0000400_Permit Modification_19970206

State of North Carolina
Department of Environment, .
Health and Natural Resources IN, 4 • •
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary 1=3 Fl NI
A. Preston Howard,Jr., P.E., Director �J
February 6, 1997
Mr.Glenn Young
K-T Feldspar Corporation
P.O. Box 309
Spruce Pine,North Carolina 28777
Subject: Permit Modification
NPDES Permit NC0000400
K-T Feldspar Corporation
Mitchell County
Dear Mr.Young:
On December 16, 1996, the Division issued the subject permit to K-T Feldspar Corporation. After a
review of the permit by the Aquatic Survey & Toxicology Unit, it was discovered that the final paragraph of
the requirements for Chronic Toxicity monitoring had been inadvertently left out of the permit. Accordingly,
the Division is issuing this permit modification. This modification corrects the requirements for Chronic
Toxicity monitoring (Part III, Section E.).
Please find enclosed the modified page of the permit. Replace the original page in your permit with
the newer enclosed page and discard the old page. All other terms and conditions contained in the original
permit remain unchanged and in full effect. These permit modifications are issued pursuant to the requirements
of North Carolina General Statutes 143-215.1 and the Memorandum of Agreement Between North Carolina and
the U.S. Environmental Protection Agency.
If any parts, measurement frequencies or sampling requirements contained in this permit modification
are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, an filed with the Office of Administrative Hearings,
Post Office Drawer 27447, Raleigh, North Carolina 27611-7447. Unless such demand is made this decision
shall be final and binding.
If you have any questions,please contact Charles Weaver at [phone] extension 511.
Sincerely,
/),4.4.7.:4_,d.
ex Preston Howard,Jr.,P. .
cc: Central Files
Asheville Regional Office, Water Quality Section
Roosevelt Childress, EPA
Permits and Engineering Unit
Facility Assessment Unit
Aquatic Survey and Toxicology Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone[phone] FAX[phone]
An Equal Opportunity Affirmative Action Employer 50%recycled /10%post-consumer paper

Part III Permit No. NC0000400
E. CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT(QUARTERLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised November 1995, or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality
is 6.0% (defined as treatment two in the procedure document). The permit holder shall perform quarterly
monitoring using this procedure to establish compliance with the permit condition.The tests will be performed
during the months of February,May,August and November. Effluent sampling for this testing shall be performed
at the NPDES permitted final effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form(MR-1) for the month in which it was performed,using the parameter code TGP3B. Additionally,
DWQ Form AT-1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of Water Quality
4401 Reedy Creek Road
Raleigh, North Carolina 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent
toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name,permit number,pipe number,county,and the month/year of the report with the notation of"No
Flow"in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at the
address cited above.
Should any single quarterly monitoring indicate a failure to meet specified limits,then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterly in the months specified above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test
requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream, this permit may be re-opened and modified to include
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document,such as minimum control organism
survival,minimum control organism reproduction,and appropriate environmental controls,shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
QCL P/F Version 9/96