NC0020427_2000 Performance Eval Study_20010201

North Carolina
Department of Environment and Natural Resources
Michael F. Easley, Governor
Sherri Evans -Stanton, Acting Secretary
February 1, 2001
178
Mr. Larry D. Cobler
City of Rockingham WWTP
311 East Franklin Street
Rockingham, NC 28379
Subject: 2000 Performance Evaluation Study
Dear Mr. Cobler:
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The North Carolina Wastewater/Groundwater Laboratory Certification program has received the
1) Environmental Resource Associates (ERA) study results that were submitted. Our program requires you to
analyze blind (unknown) performance ampuls for all parameters that currently appear on Attachment I of your
Certified Parameter list. The study you submitted did not contain acceptable values, or analytical values were not
provided for the following parameter:
1.
Conductivity , NO VALUE PROVIDED
If your laboratory has already conducted a blind study for these analyses in 2000, please supply this office with -a
copy of the results. If a blind study was not completed in 2000, your laboratory must secure and analyze
performance evaluation samples and have your approved selected vendor provide us with the results. Likewise, our
program requires that you arrange to procure blind follow-up samples for all unacceptable results. Please notify this
office within 10 days, by fax, e-mail, telephone, or U.S. Postal service of your intent to complete these requirements.
Fax:
E-mail:
Telephone:
Address;
919 - 733 - 6241
Tonja.Springer(u�ncmail.net
919 - 733 - 3908
1623 Mail Service Center
Raleigh, NC 27699-1623
Contact us at 919-733-3908, extension 254, if you have questions concerning our program requirements.
Sincerely,
Tonja Springer
Laboratory Section
TS: is
cc: James W. Meyer
Norman L. Good
Fayetteville Regional Office
Study2000.1tr
1623 Mail Service Center, Raleigh, North Carolina 27699-1623
Phone: 919 - 733-3908 '\ FAX: 919 — 733-6241 \ Internet: www.enr.state.nc.us/LAB/
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