NC0081825_Lab Certification Inspection_20060301

March 1, 2006
• 5242
Mr. Frankie Roberts
- Town. of Anso.nville VVV TP
PO Box 437
Ansonville, NC 28007•
-
SUBJECT: Laboratory Certification Maintenance Inspection
Dear Mr. Roberts:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
DENR -FR0
VAR 0 3 20C3
DWQ
Enclosed. is a report for the . inspection performed on February 23, 2006 by Mr. David
Livingston. Where deficiencies are cited in this report, a ,response is required as well as for all lettered
comments and/or recommendations. Within thirty days of receipt, please supply this office with a
written item for item description of how these deficiencies, comments and/or recommendations were
corrected. If the deficiencies cited in the enclosed report are not corrected, enforcement actions will
be recommended. For certification maintenance, your laboratory must continue to carry, out the
requirements setforth in 15A NCAC 2H .0800.
Copies of the checklists completed during the inspection may be requested from .this office.
Thank you for your cooperation during the inspection. If you wish to obtain an electronic copy of this
report by email, or if you have questions or need additional information please contact us at 919-733-
3908.
Sincerely, -
James W. Meyer
Laboratory Section
Enclosure
cc: David Livingston
Fayetteville Regional Office
Laboratory Section 1623 Mail Service Center; Raleigh, NC 27699-1623
4405 Reedy Creek Road; Raleigh, NC 27607
Phone [phone] / FAX [phone] / Internet www.dwglab.org
NorthCarolina
Naturally
An. Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper

LABORATORY NAME::
ADDRESS:..
CERTIFICATE NO:
DATE OF INSPECTION:
TYPE OF INSPECTION:
EVALUATOR:
On -Site Inspection Report
Town of Ansonville WVVTP
NPDES # NC0081825
PO Box 437
Ansonville, NC 2800.7
#5242 -
2/23/2006 .
Maintenance Field Inspection
Mr. David G. Livingston
LOCAL PERSON(S) CONTACTED: Mr. Frankie Roberts and Ms. Mandy Thomas
I. INTRODUCTION:
. This laboratory was inspected to verify its compliance with the requirements of 15A NCAC 2H .0800
for the analysis of environmental samples.
II. . GENERAL COMMENTS:
The laboratory is spacious and well equipped. All facilities and equipment are well maintained. -
Records are well kept and most data looked good. Some further quality- control procedures need to
be implemented.
III: DEFICIENCIES, REQUIREMENTS, COMMENTS AND RECOMMENDATIONS:
pH METER"
(A) COMMENT: The'laboratory has verified the temperature probe of the pH meter within the last
12 months but did not document the temperature correction of 0.8°C on the meter. .
RECOMMENDATION:. Place a : note on the meter, as a reminderr to the analyst, .that the
temperature reading must be corrected every analysis.._ day by .+0.8°C and ' the corrected
temperature reported.
.REQUIREMENT: Preferably the temperature correction should not vary by more than 1 °C. The
thermometer should/must be Tess than 3°C.from the certified reading to be acceptable.
Note: 1 have included ,the preparation of the Residual Chlorine annual ' curve 'as we discussed .
during. the inspection.
TOTAL RESIDUAL CHLORINE CURVE PREPARATION
Prepare a"stock solution by diluting 891 mg KMnO4 (potassium permanganate) to a liter.;
Dilute 10 mL -of stock solution to 100011 with DI or distilled water in 'a volumetric flask. Thisis the
Intermediate standard.

Page 2 ,
Town of Ansonville WWTP
Dilute 1 mL of the Intermediate standard to 100mL with DI or distilled water, a chlorine equivalent
of 1.00 mg/L will be produced in the DPD reaction. This is the Working standard.
From this Working standard you will make up your annual curve: -
Since your permit is for 28 pg/L I would recommend a lower reporting limit of 20 pg/L and the top of
your curve at 1'00 pg/L.
Take 10 mL of working standard to 100 mL with distilled water in a volumetric -flask.:,
This is your 100pg/L standard:
•::,Take 8 mL of working standard to 100 mL with distilled water in a volumetric flask.
This is your 80 pg/L standard. -
Take 6 mL of working, standard to 100 mL with distilled water in a volumetric flask.
This is your 60 pg/L standard.
Take 4 mL of working standard to 100 mL with distilled water in a volumetric flask.
•' This is your 40 pg/L standard.
Take 2 mL of working standard to 100 mL with distilled water in a volumetric flask.
This is your 20 pg/L standard.
Your curve correlation must be > 0.995. If you need assistance calculating the a curve correlation,
give me a call 919-733-3908 ext. 272.
Now the concentrations I figured out are just recommendations and you can choose the curve
points. and the range you choose to cover. Just remember this, you have to have a standard below
your permitted limit of,28 pg/L and anything that is above your highest standard must be diluted
into range.
IV.. PAPER TRAIL INVESTIGATION:
This consisted of comparing data on DMRs with the values obtained on • laboratory bench
worksheets: All data, reviewed for the months of December 2005 and January. 2006 indicated` no
problems in, proper transfer of data for reporting purposes.
CONCLUSIONS:
Correcting the above cited comment by implementing the recommendation will help this lab to
produce quality data and meet certification requirements. Please respond to the lettered
comment.
Report prepared by: David G. Livingston Date:.2/27/2006