NC0088722_Compliance Sampling Inspection_20160928

WaierResaurces
ENVIRONMENTAL QUALITY
Mr. Don Chamblee, Public Works Director
County of Lincoln
115 West Street, 2nd Floor Citizens Center
Lincolnton, NC 28091
Dear Mr. Chamblee:
September 22, 2016
PAT MCCRORY
Governor
DONALD R. VAN DER VAART
sectera'y
S. JAY ZIMMERMAN
Director
SEP 28 2016
Water Quality
Perrn;tting Section
Subject: Compliance Sampling Inspection
Lincoln County (Killian Creek) WWTP
NPDES Permit No. NCO088722
Lincoln County
Enclosed is a copy of the laboratory results for the effluent samples collected during the
Compliance Sampling Inspection performed at the subject facility on July 6, 2016 by Ori Tuvia and
Wes Bell. During the inspection DWR staff collected effluent samples. Tommy Drum's and Jim
Simmons cooperation during the site visit was much appreciated. The sampling results revealed
that the facility complied with all applicable effluent permit limits (see attached results). Please
inform the facility's Operator -in -Responsible Charge (011C) of our findings by forwarding a copy of
the enclosed report.
Field Parameters results, checked during the inspections were:
pH 7.2 (SU)
Water temp 25.1 (degrees Celsius)
Dissolved oxygen 7.8 (ppm)
Mooresville Regional Office
Location: 610 East Center Ave., Suite 301 Mooresville, NC 28115
Phone: [phone] Fax: [phone] Customer Service: 1-877-623-6748

Should you have any questions concerning this report, please do not hesitate to contact Ori
Tuvia at [phone], or at [e-mail].
Sincerely,
Ori Tuvia, Environmental Engineer
Mooresville Regional Office
Division of Water Resources, DEQ
Enclosures:
Sample Results
Cc: NPDES Unit
MRO Files
Lincoln County Health Department

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Symbol Definition
A Value reported is the mean (average) of two or more determinations. This code is to be used if the results of two or more
discrete and separate samples are averaged. These samples shall have been processed and analyzed independently (e.g. field
duplicates, different dilutions of the same sample). This code is not required for BOD, coliform or acute/chronic metals
reporting since averaging multiple results for these parameters is fundamental to those methods or manner of reporting.
1. The reported value is an average, where at least one result is qualified with a "U". The PQL is used for the qualified
results to calculate the average.
B Results based upon colony counts outside the acceptable range and should be used with caution. This code applies to
microbiological tests and specifically to membrane filter (MF) colony counts. It is to be used if less than 100% sample was
analyzed and the colony count is generated from a plate in which the number of colonies exceeds the ideal ranges indicated by
the method. These ideal ranges are defined in the method as:
Fecal coliform or Enterococcus bacteria: 20-60 colonies Total coliform bacteria: 20-80 colonies
1. Countable membranes with less than 20 colonies. Reported value is estimated or is a total of the counts on all filters
reported per 100 ml.
2. Counts from all filters were zero. The value reported is based on the number of colonies per 100 ml that would have
been reported if there had been one colony on the filter representing the largest filtration _volume (reported as a less
than "<" value).
3. Countable membranes with more than 60 or 80 colonies. The value reported is calculated using the count from the
smallest volume filtered and reported as a greater than ">" value.
4. Filters have counts of both >60 or 80 and <20. Reported value is estimated or is a total of the counts on all filters
reported per 100 ml.
5. Too many colonies were present; too numerous to count (TNTC). TNTC is generally defined as >150 colonies. The
numeric value represents the maximum number of counts typically accepted on a filter membrane (60 for fecal or
enterococcus and 80 for total), multiplied by 100 and then divided by the smallest filtration volume analyzed. This
number is reported as a greater than value.
6. Estimated Value. Blank contamination evident.
7. Many non -coliform or non -enterococcus colonies or interfering non -coliform or non -enterococcus growth present. In
this competitive situation, the reported value may under -represent actual density.
Note: A "B" value shall be accompanied by justification for its use denoted by the numbers listed above (e.g., B1, B2, etc.).
Note: A "J2" should be used forspiking failures.
BB This code applies to most probable number (MPN) microbiological tests.
1. No wells or tubes gave a positive reaction. Value based upon the appropriate MPN Index and reported as a less than
"<" value.
2. All wells or tubes gave positive reactions. Value based upon the NPN Index and reported as a greater than ">" value. -
Note: A "BB" value shall be accompanied by justification for its use denoted by the numbers listed above (e.g., BB 1, BB2,'
etc.).
C Total residual chlorine was present in sample upon receipt in the laboratory; value is estimated. Generally applies to cyanide,
phenol, NH3, TKN, coliform, and organics.
G A single quality control failure occurred during biochemical oxygen demand (BOD) analysis. The sample results should be
used with caution.
1. The dissolved oxygen (DO) depletion of the dilution water blank exceeded 0.2 mg/L.
2. The bacterial seed controls did not meet the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual
of at least 1.0 mg/L.
3. No sample dilution met the requirement of a DO depletion of at least 2.0 mg/L and/or a DO residual of at least 1.0
mg/L.
4. Evidence of toxicity was present. This is generally characterized by a significant increase in the BOD value as the
sample concentration decreases. The reported value is calculated from the highest dilution representing the maximum
loading potential and should be considered an estimated value.
5. The glucose/ glutamic acid standard exceeded the range of 198 f 30.5 mg/L.
6. The calculated seed correction exceeded the range of 0.6 to 1.0 mg/L.
7. Less than 1 mg/L DO remained for all dilutions set. The reported value is an estimated greater than value .and is
calculated for the dilution using the least amount of sample.
8. Oxygen usage is less than 2 mg/L for all dilutions set. The reported value is an estimated less than value and is
calculated for the dilution using the most amount of sample.
9. The DO depletion of the dilution water blank produced a negative value.
Note: A "G" value shall be accompanied by justification for its use denoted by the numbers listed above e.., GI, G2, etc.).
J Estimated value; value may not be accurate. This code is to be used in the following instances:
1. Surrogate recovery limits have been exceeded.
2. The reported value failed to meet the established quality control criteria for either precision or accuracy.
3. The sample matrix interfered with the ability to make any accurate determination.

X Sample not analyzed for this constituent. This code is to be used if:
1. Sample not screened for this compound.
2. Sampled, but analysis lost or not performed -field error.
3. Sampled, but analysis lost or not perforriied-lab error.
Note: an' X" value shall be accompanied by justification for its use by the numbers listed.
Y I Elevated PQL* due to insufficient sample size.
ZThe sample analysis/results are not reported due to:
1. Inability to analyze the sample.
2. Questions concerning data reliability.
The presence or absence of the analyte cannot be verified.
4. The data is questionable because of improper laboratory or field protocols (e.g., composite sample was collected
instead of grab, plastic instead of glass container, etc.).
5.. Temperature limits exceeded (samples frozen or >6°C) during transport or not verifiable (e.g., no temperature blank
provided): non -reportable for NPDES compliance monitoring.
J
6. The laboratory analysis was from an unpreserved or improperly chemically preserved -sample. The data may not be
accurate.
7. This qualifier is used to identify analyte concentration exceeding the upper calibration range of the analytical
instrument/method. The reported value should be considered estimated.
8. Temperature limits exceeded (samples frozen or >6°C) during_ storage, the data may not be accurate.
9. The reported value is determined by a one -point estimation rather than against a regression equation. The estimated
concentration is less than the laboratory practical quantitation limit and greater than the laboratory method detection
limit.
10. Unidentified peak, estimated value.
11. The reported value is determined by a one -point estimation rather than against a regression equation. The estimated
concentration is less than the laboratory practical quantitation limit and greater than the instrument noise level. This
code is used when an AML has not been established for the analyte in question.
12. The calibration verification did not meet the calibration acceptance criterion for field parameters.
Note: A "J" value shall be accompanied by justification for its use denoted by the numbers listed above (e.g., JI, J2, etc.). A "J"
value shall not be used if another code applies e.., N, V, W.
M
Sample and duplicate results are "out of control". The sample is non-homogenous (e.g., VOA soil). The reported value is the
lower value of duplicate analyses of a sample.
N
Presumptive evidence of presence of material; estimated value. This code is to be used if:
1.The component has been tentatively identified based on mass spectral library search.
2. There is an indication that the analyte is present, but quality control requirements for confirmation were not met (i.e.,
presence of analyte was not confirmed by alternate procedures).
3. This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is
less than the laboratory practical quantitation limit and greater than the laboratory method detection limit. This code
is not routinely used for most analyses.
4. This code shall be used if the level is too low to permit accurate quantification, but the estimated concentration is
less than the laboratory practical quantitation limit and greater than the instrument noise level. This code is used
when an MDL has not been established for the analyte in question.
5. The'component has been tentatively identified based on a retention time standard.
Q
Holding time exceeded. These codes shall be used if the value is derived from a sample that was received, prepared and/or
analyzed after the approved holding time restrictions for sample preparation and analysis. The value does not meet NPDES
requirements.
1. Holding time exceeded prior to receipt by lab.
2. Holding time exceeded following receipt by lab.
P
Elevated PQL* due to matrix interference and/or sample dilution.
S
Not enough sample provided to prepare and/or analyze a method -required matrix spike (MS) and/or matrix spike duplicate
(MSD).
U
Indicates that the analyte was analyzed for but not detected above the reported practical quantitation limit*. The number value
reported with the "U" qualifier is equal to the laboratory's practical quantitation limit*.
`7
Indicates the analyte was detected in both the sample and the associated blank. Note: The value in the blank shall not be
subtracted from the associated samples.
1. The analyte was detected in both the sample and the method blank.
2. The analyte was detected in both the sample and the field blank
X Sample not analyzed for this constituent. This code is to be used if:
1. Sample not screened for this compound.
2. Sampled, but analysis lost or not performed -field error.
3. Sampled, but analysis lost or not perforriied-lab error.
Note: an' X" value shall be accompanied by justification for its use by the numbers listed.
Y I Elevated PQL* due to insufficient sample size.
ZThe sample analysis/results are not reported due to:
1. Inability to analyze the sample.
2. Questions concerning data reliability.
The presence or absence of the analyte cannot be verified.

Su ortin Definitions listed below
AML
A Method Detection Limit (MDL) is defined as the minimum concentration of a substance that can be measured and reported
with 99 percent confidence that the true value is greater than zero and is determined in accordance with 40 CFR Part 136, -
Appendix B.
N.
Minimum Levels are used in some EPA methods. A Minimum Level (ML) is the lowest level at which the entire analytical
system must give a recognizable signal and acceptable calibration point for the analyte. It is equivalent to the concentration of
the lowest calibration standard, assuming that all method - specified sample weights, volumes, and cleanup procedures have
been employed. The ML is calculated by multiplying the MDL by 3.18 and rounding the result to the nearest factor of 10
multiple (i.e., 1, 2, or 5). For example, MDL =1.4 mg/L; ML =1.4 mg/L x 3.18 = 4.45 rounded to the nearest factor of 10 '
multiple (i.e., 5) = 5.0 mg/L
*pQL
The Practical Quantitation Limit (PQL) is defined as the lowest concentration that can be reliably achieved within specified
limits of precision and accuracy during routine laboratory operating conditions.'PQLs are subjectively set at some multiple of
typical MDLs for reagent water (generally 3 to 10 times the MDL depending upon the parameter or analyte and based on the
analyst's best professional judgement, the quality and age of the instrument and the nature of the samples) rather than explicitly
determined. PQLs may be nominally chosen within these guidelines to simplify data reporting and, where applicable, are
generally equal to the concentration of the lowest non -zero, standard in the calibration curve. PQLs are adjusted for sample
size, dilution and % moisture. For parameters that are not amenable to MDL studies, the PQL may be defined by the sample
volume and buret graduations for'titrations or by minimum measurement values set by the method for method -defined
parameters (e.g., BOD requires a minimum DO depletion of 2.0 mg/L, fecal coliform requires a minimum plate count of 20
cfu, total suspended residue requires a minimum weight gain of 2.5 mg, etc.). Additionally, some EPA methods prescribe
Minimum Levels (MLs) and the lab may set the PQL equal to this method -stated ML. Determination of PQL is fully described
in the laboratory's analytical Standard Operating Procedure (SOP) document.
06/25/2015