Summary of Quarterly Operations (October through December)
with 2015 Annual Summary

EPA Contract No. EP-W-15-Q03

Introduction

This quarterly report summarizes results from the Clean Air Status and Trends Network
(CASTNET) quality assurance/quality control (QA/QC) program for data collected during fourth
quarter 2015. It also provides an annual summary that includes data from the three previous
quarters. The various QA/QC criteria and policies are documented in the CASTNET Quality
Assurance Project Plan (QAPP; Amec Foster Wheeler, 2014). The QAPP is comprehensive and
includes standards and policies for all components of project operation from site selection
through final data reporting. It is reviewed annually and updated as warranted.

Significant Events for 2015

During 2015, AMEC Environment and Infrastructure, Inc. (AMEC) received Modification 0006
to Contract EP-W-15-003 in which EPA accepted AMEC's name change to Amec Foster
Wheeler Environment & Infrastructure, Inc. (Amec Foster Wheeler).

There were two changes in Key Personnel for CASTNET during 2015. Amec Foster Wheeler
received Contract Modification 0066 to the CASTNET IV contract (EP-W-09-028) on January 14,
2015, which approved Ann Bernhardt as Amec Foster Wheeler's CASTNET QA Supervisor.
Additionally, Amec Foster Wheeler received Contract Modification 0009 to the CASTNET Bridge
contract (EP-W-15-003) on October 27, 2015, which approved Katherine Barry as the CASTNET
Laboratory Operations Manager.

During 2015, Amec Foster Wheeler submitted sample analyses for proficiency test (PT)
studies 0105 and 0106 for Rain and Soft Waters to the National Laboratory of Environmental
Testing (NLET), a branch of the National Water Research Institute (NWRI) with Environment
Canada that provides QA services. Amec Foster Wheeler received the results from PT study 0105
in March. A low bias was indicated for the pH analyses. One sample was flagged "action high" for
potassium and chloride. Amec Foster Wheeler was rated good for the study overall. Corrective

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CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

action was implemented for the low bias and "action high" flags. The documented completed
corrective action was submitted to the American Association for Laboratory Accreditation (A2LA)
along with the study results as required for accredited laboratories. The corrective action was
accepted by A2LA. Amec Foster Wheeler received results from PT study 0106 in August. Amec
Foster Wheeler was rated "very good" for analyses for PT study 0106. Amec Foster Wheeler's
5-year average remained "very good," the highest rating available.

During January 2015, comments received from EPA on the CASTNET QAPP Revision 8.2 were
incorporated into the QAPP, and Revision 8.2 was finalized. After EPA approved the final
version of the QAPP Revision 8.2, it was distributed to the designated recipients.

Amec Foster Wheeler corporate continued to support the analytical laboratory's activities with
regard to maintaining 17025:2005 accreditation under the International Organization for
Standardization (ISO)/International Electrotechnical Commission (IEC). An assessment of the
laboratory was performed by an assigned assessor from A2LA in early April 2015. There was a
single deficiency related to the existing scope of accreditation requiring an explicit definition of
the authority of the QA Manager to ensure the management system is implemented and
followed. This deficiency was addressed by revising the laboratory quality manual. Objective
evidence of the corrective action was provided to A2LA in early May 2015. Amec Foster
Wheeler's accreditation was renewed and is good for two years until May 31, 2017.

Additionally, Amec Foster Wheeler extended ISO/IEC 17025:2005 accreditation to select field-
based activities. This accreditation is good until May 31, 2017.

An annual management review in support of maintaining ISO/IEC 17025:2005 accreditation by
A2LA is required. The report was provided to the Amec Foster Wheeler management group in
December 2015.

EPA's Office of Air Quality Planning and Standards (OAQPS) requested that only ozone 1-point
QC checks that are associated with valid data be submitted to EPA's Air Quality System (AQS).
Those 1-point QC checks that are associated with data that have been invalidated are being
excluded starting with the January 2015 ozone data.

During second quarter, Amec Foster Wheeler determined that ozone concentration data from the
Rocky Mountain National Park, CO site (ROM206) showed concentrations have been 2 to 3
parts per billion (ppb) higher than those measured by the collocated ROM406 site since
installation of the reactive oxides of nitrogen (NOy) analyzer at ROM206. During third quarter,
Amec Foster Wheeler took corrective action by placing all of the ozone analyzers at the trace-
level gas monitoring sites on the standard zero air generation system used at CASTNET sites that
do not measure trace-level gases.

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The CASTNET QA Manager worked with EPA to revise the CASTNET QAPP siting criteria to
include siting criteria from Title 40 Code of Federal Regulations (CFR) Part 58 that specifically
addresses ozone monitoring for AQS-submitting sites. Modifications to siting criteria included
specific sets of criteria for the different types of sites: small-footprint, filter pack-only sites;
AQS-submitting (i.e., 40 CFR Part 58-compliant) ozone sites; and classic sites.

Road construction near the Pinedale WY (PND165) site began during third quarter. Continuation
of the road improvement project is planned for the warm season over the next two years. Road
construction activities are expected to affect monitoring activities at the site. Amec Foster
Wheeler worked with EPA, the National Park Service, and the Bureau of Land Management to
develop a flagging protocol for data collected during active periods of road construction. The
reactive oxides of nitrogen (NOy) concentration data collected during the road construction
period will be flagged as follows:

A = Anomalous value resulting from local anthropogenic activity
Additionally, ozone and filter pack concentration data will be flagged:

& = Ambient concentration data measured/collected coincident with data flagged^

The NOy data from the site will be reviewed using routine protocols with an emphasis on
examination of 1-minute data and comparison with historical concentrations. For example,

Figure 1 depicts 1-minute data used to flag hourly measurements as anomalous for hours 0400,
0800, and 1900 on September 14, 2015. Figure 2 depicts 1-minute data used to flag hourly
measurements as anomalous for hours 1200 through 1700 on September 15, 2015. In both cases,
the data not flagged are well within the site's historical concentration range and exhibit the
gradual changes in concentration expected for ambient data. As per the flagging protocol,
anomalous high readings will be flagged per the hour affected. In addition, ozone and filter pack
data collected simultaneously will be flagged as coincident with the anomalous NOy data. When
the ozone and filter pack data are reviewed through routine processes, the & flag will be
exchanged with A for hours deemed anomalous in their own right.

The required 3-year ozone facility technical systems audit (TSA) of Amec Foster Wheeler's
CASTNET ozone laboratory and a field site took place during November 2015. Jeff Nichol (RTI
International, Inc.) audited the selected field site at Prince Edward, VA (PED108) on Tuesday,
November 10, during the site operator's normal weekly site visit. Mr. Nichol performed the TSA
of the CASTNET ozone laboratory facility on November 16 and 17, 2015. Mr. Nichol completed
the majority of the facility audit on Monday, November 16, and observed the handling of the site
operator calls by Amec Foster Wheeler field personnel on Tuesday, November 17. Mr. Nichol had
positive and complimentary comments during the TSA. There were no technical findings
mentioned at the debriefing, only recommendations regarding documentation. The final TSA
report was provided to Amec Foster Wheeler by Mr. Nichol in December. Amec Foster Wheeler
forwarded the final TSA report to EPA.

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Work was completed on the annual update of the CASTNET QAPP Revision 8.3 and EPA's
comments were incorporated into the draft final version during December 2015. The updates to the
QAPP included changes recommended by the TSA auditor. The signature page of the QAPP was
updated for Revision 8.3 to include current representatives from CASTNET primary sponsors.

Quarterly/Annual Summary

Table 1 lists the quarters of data that were validated to Level 3 during 2015 by site calibration
group. Table 2 lists the sites in each calibration group along with the calibration schedule.

Table 3 presents the measurement criteria for continuous field measurements. These criteria
apply to the instrument challenges performed during site calibrations. Table 4 presents the
measurement criteria for laboratory filter pack measurements. These criteria apply to the QC
samples listed in the following section of this report. Table 5 presents the critical criteria for
ozone monitoring. Table 6 presents the critical criteria for trace-level gas monitoring.

Quality Control Analysis Count

The QC sample statistics presented in this report are for reference standards (RF) and continuing
calibration verification spikes (CC V) used to assess accuracy and for replicate sample analyses
(RP) used to assess "in-run" precision. In addition, laboratory method blanks (MB) containing
reagents without a filter; laboratory blanks (LB) containing reagents and a new, unexposed filter;
and field blanks (FB) containing reagents and an unexposed filter that was loaded into a filter
pack assembly and shipped to and from the monitoring site while remaining in sealed packaging
are also included. Tables 7 through 10 present the number of analyses in each category that were
performed during each quarter of 2015.

Sample Receipt Statistics

Ninety-five percent of field samples from EPA-sponsored sites must be received by the
CASTNET laboratory in Gainesville, FL no later than 14 days after removal from the sampling
tower. Table 11 presents the relevant sample receipt statistics for each of the four quarters of
2015 together with an annual summary for each category.

Data Quality Indicator (DQI) Results1

Figures 3 through 5 present the results of RF, CCV, and RP QC sample analyses for fourth
quarter 2015. All results were within the criteria listed in Table 4 with the exception of a single
calcium RP result. The associated sample concentration is less than 3 times the reporting limit
for calcium. Table 12 presents the percent recoveries and standard deviations for RF, CCV, and
RP QC sample analyses for 2015. Quarterly averages are all within criteria.

1 Reported statistics are calculated based on values rounded according to ASTM E29-08, Standard Practice for
Using Significant Digits in Test Data to Determine Conformance with Specifications E29 (ASTM, 2008).

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Table 13 presents quarterly collocated filter pack precision results for data validated to Level 3
during the year. Results for MCK131/231, KY and ROM406/206, CO were within the criterion
for all of the 11 parameters reported.

Figure 6 presents completeness statistics for continuous measurements validated to Level 3
during the year. All parameters met the 90 percent criterion.

Table 14 presents summary statistics of critical criteria measurements at ozone sites collected
during fourth quarter 2015. The statistics presented contain data validated at Level 2 and Level 3.
All data associated with QC checks that fail to meet the criteria listed in Table 5 were or will be
invalidated unless the cause of failure has no affect on ambient data collection, and passing
results still meet frequency criteria. Results in shaded cells either exceed documented criteria or
are otherwise notable. Table 15 presents observations associated with the shaded cell results in
Table 14.

Table 16 presents summary statistics of critical criteria measurements at trace-level gas
monitoring sites collected during fourth quarter 2015. The statistics presented contain data
validated at Level 2 and Level 3. All data associated with QC checks that fail to meet the criteria
listed in Table 6 were or will be invalidated unless the cause of failure has no affect on ambient
data collection, and passing results still meet frequency criteria. Results in shaded cells either
exceed documented criteria or are otherwise notable. Table 17 presents observations associated
with the shaded cell results in Table 16.

Laboratory Control Sample Analysis

The laboratory control sample (LCS) is a reagent blank spiked with the target analytes from the
established analytical methods and carried through the same extraction process that field samples
must undergo. The LCS is not required by the CASTNET QA/QC program. LCS analyses are
performed by the laboratory to monitor for potential sample handling artifacts and provide a
means to identify possible analyte loss from extraction to extraction. Figure 7 presents LCS
analysis results for fourth quarter 2015. All recovery values were between 83 percent and
107 percent.

Blank Results

Figures 8 through 10 present the results of MB, LB, and FB QC sample analyses for fourth
quarter 2015. All fourth quarter results were within criteria (two times the reporting limit) listed
in Table 4 with the exception of three cellulose FB samples. Table 18 summarizes the record of
filter blanks for 2015. All 2015 results were within the two times reporting limit criterion with
the exception of the three cellulose FB samples noted previously, five Teflon FB samples (three
potassium, one calcium, and one sodium), and one Teflon filter acceptance test sample (the
associated box of filters was rejected as required by protocol). The number of FB samples

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exceeding the criterion is high compared with previous years. These results are under
investigation. All other blank QC checks in their respective batches were within criteria.

Suspect/Invalid Filter Pack Samples

Filter pack samples that were flagged as suspect or invalid during each of the four quarters of
2015 are listed in Table 19. This table also includes associated site identification and a brief
description of the reason the sample was flagged. During fourth quarter, 18 filter pack samples
were invalidated.

Field Problem Count

Table 20 presents counts of field problems affecting continuous data collection for more than one
day for each quarter during 2015. The problem counts are sorted by a 30-, 60-, or 90-day time
period to resolution. A category for unresolved problems is also included. Time to resolution
indicates the period taken to implement corrective action.

Field Calibration Results

A summary of field calibration failures by parameter for each quarter of 2015 is listed in
Table 21. Calibrations were performed at 25 sites during fourth quarter 2015. During 2015, all
sites and parameters were within the criteria listed in Table 3 with the exception of the
parameters at the eight sites that are listed in Table 21.

Table 22 presents field accuracy results for 2015 based on instrument challenges performed using
independent reference standards during site calibration visits. Each parameter was within its
criterion with at least 90 percent frequency except solar radiation at 81.8 percent frequency. Per
CASTNET project protocols, data are flagged but still considered valid if the calibration criterion
is not exceeded by more than its magnitude (i.e., if within 2x the criterion). All calibration failures
reported in 2015 for the indicated parameters were within 2x the criterion with the exception of
solar radiation at PAL 190, TX. Data associated with the failure were invalidated.

References

Amec Foster Wheeler Environment & Infrastructure, Inc. (Amec Foster Wheeler). 2014. Clean
Air Status and Trends Network (CASTNET) Quality Assurance Project Plan (OAPP)
Revision 8.2. Prepared for U.S. Environmental Protection Agency (EPA), Office of Air
and Radiation, Clean Air Markets Division, Washington, DC. Contract No. EP-W-15-
003. Gainesville, FL. http://java.epa.gov/castnet/documents.do.

American Society for Testing and Materials (ASTM). 2008. ASTM E29-08, Standard Practice
for Using Significant Digits in Test Data to Determine Conformance with Specifications.
ASTM International, West Conshohocken, PA, DOI: 10.1520/E0029-08. www.astm.org.

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U.S. Environmental Protection Agency (EPA). 2015. Appendix A to Part 58 - Quality

Assurance Requirements for State and Local Air Monitoring Stations (SLAMS), Special
Purpose Monitors (SPMs), and Prevention of Significant Deterioration (PSD) Air
Monitoring. 40 CFR Part 58.

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Table 1 Data Validated to Level 3 through Fourth Quarter 2015

Calibration
Group*

Months
Available

Number of
Months

Complete
Quarters

Number of
Quarters

SE-4/MW-61'

July 2014-
June 2015

12

Quarter 3 2014 -
Quarter 2 2015

4

E-l/SE-5

August 2014 -
July 2015

12

Quarter 4 2014 -
Quarter 2 2015

3

MW-7/W-9

September 2014 -
August 2015

12

Quarter 4 2014 -
Quarter 2 2015

3

E-2 /MW-8

October 2014 -
September 2015

12

Quarter 4 2014 -
Quarter 3 2015

4

E-3/W-10*

May 2014-
April 2015

12

Quarter 3 2014 -
Quarter 1 2015

3

Notes: * The sites contained in each calibration group are listed in Table 2.
•f Contains MCK131/231 collocated pair
J Contains ROM206 of the ROM406/ROM206 collocated pair

Table 2 Field Calibration Schedule for 2015

Calibration
Group

Months
Calibrated

Sites
Calibrated

Eastern Sites (24 Total)

E-l

(8 Sites)

February/August

BEL 116, MD
BWR139, MD

WSP144, NJ
CTH110, NY

ARE 128, PA
PSU106, PA

PED108, VA
VPI120, VA

E-2
(11 Sites)

April/October

ABT147, CT
ASH135, ME
HOW191, ME

WST109, NH
CAT175, NY
HWF187, NY

NIC001, NY
WFM007, NY
WFM105, NY

EGB181, ON
UND002, VT

E-3
(5 Sites)

May/November

KEF 112, PA
MKG113, PA

LRL117, PA
PARI07, WV

CDR119, WV



Southeastern Sites (11 Total)

SE-4
(7 Sites)

January/July

SND152, AL
GAS 153, GA

BFT142, NC
CND125, NC

COW005, NC
COW137, NC

SPD111, TN

SE-5
(4 Sites)

February/August

CAD 150, AR
CVL151, MS

IRL141, FL
SUM 15 6, FL





Midwestern Sites (19 Total)

MW-6
(6 Sites)

January/July

CDZ171, KY
CKT136, KY

MCK131, KY
MCK231, KY

PNF126, NC
ESP127, TN



MW-7
(9 Sites)

March/September

ALH157, IL
BVL130, IL
STK138, IL

VIN140, IN
RED004, MN
DCP114, OH

OXF122, OH
QAK172, OH
PRK134, WI



MW-8
(4 Sites)

April/October

SAL133, IN
HOX148, MI

ANA115, MI
UVL124, MI





Western Sites (10 Total)

W-9
(5 Sites)

March/September

KNZ184, KS
KIC003, KS

CHE185, OK
SAN 189, NE

ALC188, TX



W-10

(5 Sites)

May/November

GTH161, CO
ROM206, CO

CNT169, WY
PND165, WY

PAL 190, TX



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Table 3 Data Quality Indicators for CASTNET Continuous Measurements

Measurement
Parameter2 Method

Criteria1

Precision Accuracy

Filter pack flow

Mass flow controller

± 10%

±5%

Ozone3

UV absorbance

All points within ± 2% of full scale of best fit
straight line

Linearity error <5%

Wind speed

Anemometer

± 0.5 m/s

The greater of ± 0.5 m/s
for winds < 5 m/s or
± 5% for winds > 5 m/s

Wind direction

Wind vane

±5°

±5°

Sigma theta

Wind vane

Undefined

Undefined

Ambient temperature

Platinum RTD

± 1.0°C

±0.5°C

Delta temperature

Platinum RTD

± 0.5°C

±0.5°C

Relative humidity

Thin film capacitor

± 10% (of full scale)

± 10%

Precipitation

Tipping bucket rain
gauge

± 10% (of reading)

± 0.05 inch4

Solar radiation

Pyranometer

± 10% (of reading taken
at local noon)

± 10%

Surface wetness

Conductivity bridge

Undefined

Undefined

Notes: °C = degrees Celsius
m/s = meters per second
RTD = resistance-temperature device
UV = ultraviolet

1	Precision criteria apply to collocated instruments, and accuracy criteria apply to calibration of instruments. Collocated precision criteria
do not apply to 40 CFR Part 58 ozone measurements.

2	Meteorological parameters are only measured at five of the EPA-sponsored CASTNET sites: BVL130. IL; BEL116. MD; CHE185. OK;
COW137, NC; and PAL190. TX. '

3	Ozone is not measured at 10 EPA-sponsored CASTNET sites: KIC003. KS; KNZ184. KS; RED004. MN; COW005. NC; EGB181. ON;
CAT175, NY; NIC001. NY; WFM007. NY; WFM105. NY; and UND002. VT.

4	For target value of 0.50 inch

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Table 4 Data Quality Indicators for CASTNET Laboratory Measurements

Analyte

Method

Precision1
(MARPD)

Accuracy2
(%)

Nominal
Reporting Limits

mg/L

(Xg/Filter

Ammonium (NH4)

AC

20

90-110

0.020*

0.5

Sodium (Na+)

ICP-OES

20

95 - 105

0.005

0.125

Potassium (K+)

ICP-OES

20

95 - 105

0.006

0.15

Magnesium (Mg2 )

ICP-OES

20

95 - 105

0.003

0.075

Calcium (Ca2+)

ICP-OES

20

95 - 105

0.006

0.15

Chloride (CI )

IC

20

95 - 105

0.020

0.5

Nitrate (N03)

IC

20

95 - 105

0.008*

0.2

Sulfate (SO4)

IC

20

95 - 105

0.040

1.0

Notes: 1 This column lists precision goals for both network precision calculated from collocated filter samples and laboratory precision based on
replicate samples.

2 This column lists laboratory accuracy goals based on reference standards and continuing calibration verification spikes. The criterion is
90-110 percent for ICP-OES reference standards.

AC	= automated colorimetry

IC	= ion chromatography

ICP-OES = inductively coupled plasma-optical emission spectrometry
MARPD = mean absolute relative percent difference
mg/L = milligrams per liter
jug Filter = micrograms per filter
*	= as nitrogen

Values are rounded according to American Society for Testing and Materials (ASTM) E29-08, Standard Practice for Using Significant
Digits in Test Data to Determine Conformance with Specifications (ASTM, 2008).

For more information on analytical methods and associated precision and accuracy criteria, see the CASTNET QAPP, (Amec Foster
Wheeler, 2014).

Table 5 Ozone Critical Criteria*

Type of Check

Analyzer Response

Zero

Less than ± 3 parts per billion (ppb)

Span

Less than or equal to ± 7 percent between supplied and observed concentrations

Single Point QC

Less than or equal to ± 7 percent between supplied and observed concentrations

Notes: * Applies to CASTNET sites that are configured and operated in accordance with 40 CFR Part 58 (EPA 2015). The minimum frequency
for these checks is once every two weeks.

Values are rounded according to ASTM E29-08, Standard Practice for Using Significant Digits in Test Data to Determine Conformance with
Specifications (ASTM, 2008).

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Table 6 Trace-level Gas Monitoring Critical Criteria*

Parameter

Analyzer Response

Zero Check

Span Check / Single Point QC Check

S02

Less than ± 3 ppb

Less than or equal to ± 10 percent between supplied and
observed concentrations

NOy

Less than ± 3 ppb

CO

Less than ± 40 ppb

Notes: *Applies to CASTNET sites that are configured and operated in accordance with 40 CFR Part 58 (EPA 2015). The minimum frequency
for these checks is once every two weeks.

Values are rounded according to ASTM E29-08, Standard Practice for Using Significant Digits in Test Data to Determine Conformance
with Specifications E29 (ASTM, 2008).

SO, = sulliir dioxide

NOy = total reactive oxides of nitrogen

CO = carbon monoxide

ppb = parts per billion

Table 7 QC Analysis Count for First Quarter 2015

Filter
Type

Parameter

RF
Sample
Count

ccv

Sample
Count

RP
Sample
Count

MB
Sample
Count

LB
Sample
Count

FB
Sample
Count

Teflon

so2;

53

201

86

18

26

130



no;

53

201

86

18

26

130



nh4

36

185

89

18

26

130



cr

53

201

86

18

26

130



Ca2+

36

186

88

18

26

130



Mg2+

36

186

88

18

26

130



Na+

36

186

88

18

26

130



K+

36

186

88

18

26

130

Nylon

so2;

36

183

83

18

26

130



no;

48

195

89

24

26

136

Cellulose

so2;

37

185

82

18

26

130

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Table 8 QC Analysis Count for Second Quarter 2015

Filter
Type

Parameter

RF
Sample
Count

ccv

Sample
Count

RP
Sample
Count

MB
Sample
Count

LB
Sample
Count

FB
Sample
Count

Teflon

so2;

51

193

82

18

26

96



NOj

51

193

82

18

26

96



nh+4

36

175

81

18

26

96



cr

51

193

82

18

26

96



Ca2+

38

181

83

19

26

96



Mg2+

38

181

83

19

26

96



Na+

38

181

83

19

26

96



K+

38

181

83

19

26

96

Nylon

so2;

37

181

79

18

26

96



NOj

51

195

86

25

26

103

Cellulose

so2;

35

177

80

17

26

96

Table 9 QC Analysis Count for Third Quarter 2015

Filter
Type

Parameter

RF
Sample
Count

CCV
Sample
Count

RP
Sample
Count

MB
Sample
Count

LB
Sample
Count

FB
Sample
Count

Teflon

so2;

51

196

82

18

26

94



NOj

51

196

82

18

26

94



nh+4

36

179

81

18

26

94



cr

51

196

82

18

26

94



Ca2+

36

181

82

18

26

94



Mg2+

36

181

82

18

26

94



Na+

36

181

82

18

26

94



K+

36

181

82

18

26

94

Nylon

so2;

41

182

80

20

26

94



NOj

53

194

86

26

26

100

Cellulose

so2;

37

182

82

18

26

94

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Table 10 QC Analysis Count for Fourth Quarter 2015

Filter
Type

Parameter

RF
Sample
Count

ccv

Sample
Count

RP
Sample
Count

MB
Sample
Count

LB
Sample
Count

FB
Sample
Count

Teflon

so2;

48

180

74

15

24

92



NOj

48

180

74

15

24

92



nh+4

48

155

72

15

22

92



cr

48

180

74

15

24

92



Ca2+

30

160

70

15

22

92



Mg2+

30

160

70

15

22

92



Na+

30

160

70

15

22

92



K+

30

160

70

15

22

92

Nylon

so2;

32

160

72

15

22

92



NOj

44

172

78

21

22

98

Cellulose

so2;

31

160

70

15

22

92

Table 11 Filter Pack Receipt Summary for 2015

Description

First
Quarter

Second
Quarter

Third
Quarter

Fourth
Quarter

Annual
Summary

Count of samples received
more than 14 days after
removal from tower:

22

9

11

9

51

Count of all samples
received:

875

751

832

711

3,169

Fraction of samples

received within 14 days:

0.975

0.988

0.987

0.987

0.984

Average interval in days:

5.190

4.762

4.993

5.224

5.042*

First receipt date:

01/02/2015

04/02/2015

07/01/2015

10/01/2015

01/02/2015

Last receipt date:

03/31/2015

06/25/2015

09/30/2015

12/17/2015

12/17/2015

Notes: *annual average

Amec Foster Wheeler Project No. 6064150003

13	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 12 Filter Pack QC Summary for 2015





Reference
Sample1 Recovery (%R)

Continuing Calibration
Verification Samples (%R)

In-Run Replicate2
(RPD)

Filter Type

Parameter

Mean

Std. Dev.

"i

s
s

o
U

Mean

Std. Dev.

s
s

o
U

Mean

Std. Dev.

"i

s
s

o
U

Teflon

so2;

97.73

1.81

48

99.52

1.38

180

1.21

1.09

74



no;

101.33

1.79

48

98.87

1.64

180

1.34

1.27

74



nh+4

100.34

2.38

30

101.24

1.77

155

0.68

0.84

72



Ca2

98.52

2.19

30

100.15

1.02

160

1.63

3.42

70



Mg2+

100.42

0.93

30

99.95

0.74

160

1.17

1.00

70



Na+

99.12

1.11

30

99.80

1.06

160

1.13

0.81

70



K

98.06

1.75

30

99.83

0.86

160

1.66

1.55

70



Cl"

100.33

1.90

48

102.61

1.32

180

1.60

1.35

74

Nylon

so2;

98.27

0.64

32

99.61

0.92

160

4.40

3.93

72



2
o

101.78

0.99

44

97.79

1.28

172

2.84

2.43

78

Cellulose

so2;

99.51

0.97

31

99.98

0.60

160

6.00

3.66

70

Notes: %R = percent recovery

RPD = relative percent difference

1	Results of reference sample analyses provide accuracy estimates

2	Results of replicate analyses provide precision estimates

3	Number of QC Samples

Table 13 Precision Results for Third Quarter 2014 through Second Quarter 2015

Site
Pairs

SO^

i «

O

z

nh4

Ca2+

Mg2+

Na +

K+

CI

hno3

so2

Total

no3

MCK131/231, KY

2014 Q3

1.36

5.58

1.87

3.76

2.85

2.50

4.23

0.46

2.76

2.72

1.74

2014 Q4

1.53

5.11

1.15

8.32

6.53

4.22

4.41

5.97

5.13

2.67

3.71

2015 Q1

1.86

1.92

1.47

8.16

5.56

8.12

3.56

9.88

3.48

1.63

1.42

2015 Q2

2.21

5.54

1.70

5.17

4.01

2.91

4.60

2.57

3.92

7.44

2.83

Average

1.74

4.54

1.55

6.35

4.74

4.44

4.20

4.72

3.82

3.62

2.43

ROM406/206, CO

2014 Q3

4.33

9.87

5.48

5.43

5.68

6.85

6.16

2.10

5.44

8.66

4.36

2014 Q4

5.72

11.38

6.20

10.50

9.57

9.92

10.61

14.74

8.15

12.91

6.87

2015 Q1

4.03

14.81

5.09

8.62

5.75

9.32

7.64

6.06

7.55

17.83

4.41

2015 Q2

3.70

16.36

5.54

4.18

2.72

3.20

4.60

5.87

1.31

13.16

9.85

Average

4.45

13.11

5.58

7.18

5.93

7.32

7.25

7.19

5.61

13.14

6.37

Notes: 0 of 88 site-quarter-parameters were outside criterion
MARPD = mean absolute relative percent difference

Amec Foster Wheeler Project No. 6064150003

14	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 14 Ozone QC Summary for Fourth Quarter 2015 (1 of 2)

Site ID

% Span
Pass1

Span

|%D |2

% Single
Point QC

Pass1

Single Point

QC |%D|2

Single
Point
QC CL3

% Zero
Pass1

Zero
Average
(ppb)2

ABT147, CT

100.00

0.86

100.00

0.78

0.10

100.00

0.20

ALC188, TX

100.00

0.95

100.00

1.13

0.19

100.00

0.38

ALH157, IL

100.00

0.94

100.00

0.72

0.11

100.00

0.14

ANA115, MI

98.92

1.00

100.00

0.65

0.09

97.80

0.85

ARE128, PA

100.00

0.62

100.00

0.61

0.11

100.00

0.31

ASH135, ME

100.00

0.92

100.00

0.93

0.09

100.00

0.18

BEL 116, MD

100.00

1.33

98.89

1.20

0.26

100.00

0.34

BFT142, NC

100.00

1.19

97.78

1.27

0.24

100.00

0.15

BVL130, IL

100.00

0.70

100.00

1.53

0.09

100.00

0.41

BWR139, MD

100.00

2.60

100.00

3.24

0.17

100.00

0.17

CAD 150, AR

100.00

0.78

98.81

0.91

0.23

100.00

0.34

CDR119, WV

100.00

1.70

100.00

2.08

0.13

100.00

0.28

CDZ171, KY

100.00

0.41

100.00

0.47

0.08

100.00

0.13

CKT136, KY

100.00

0.56

100.00

1.07

0.10

100.00

0.14

CND125, NC

100.00

1.62

98.92

1.20

0.25

100.00

0.23

CNT169, WY

100.00

1.23

100.00

0.77

0.10

100.00

0.71

COW 13 7, NC

100.00

1.26

100.00

1.76

0.13

100.00

0.62

CTH110, NY

95.96

2.82

98.99

1.68

1.08

93.94

1.83

CVL151, MS

100.00

0.76

100.00

0.88

0.15

100.00

0.28

DCP114, OH

98.57

2.16

100.00

1.17

0.21

100.00

0.19

ESP127, TN

100.00

0.66

100.00

0.60

0.08

100.00

0.16

GAS153, GA

90.20

1.88

89.22

1.89

0.47

100.00

0.57

GTH161, CO

91.35

3.60

92.93

3.76

0.46

100.00

0.22

Amec Foster Wheeler Project No. 6064150003

15	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 14 Ozone QC Summary for Fourth Quarter 2015 (2 of 2)

Site ID

% Span
Pass1

Span

|%D |2

% Single
Point QC

Pass1

Single Point

QC |%D|2

Single
Point
QC CL3

% Zero
Pass1

Zero
Average
(ppb)2

HOX148, MI

100.00

0.28

100.00

1.10

0.08

100.00

0.74

HWF187, NY

100.00

0.84

100.00

0.88

0.07

100.00

0.11

IRL141, FL

100.00

2.44

100.00

1.66

0.24

100.00

0.91

KEF 112, PA

100.00

2.63

100.00

2.86

0.22

100.00

0.21

LRL117, PA

100.00

0.63

97.92

0.94

0.28

98.96

0.33

MCK131, KY

98.94

1.42

98.94

1.65

0.19

100.00

0.40

MCK231, KY

100.00

1.23

100.00

1.64

0.19

100.00

0.56

MKG113, PA

100.00

0.54

100.00

0.48

0.05

100.00

0.13

OXF122, OH

100.00

1.60

98.95

2.15

0.24

98.95

0.83

PAL 190, TX

100.00

1.16

100.00

1.52

0.20

100.00

0.27

PARI07, WV

100.00

0.85

98.82

1.18

0.30

100.00

0.54

PED108, VA

98.95

3.59

97.89

3.76

0.20

100.00

0.31

PND165, WY

100.00

1.20

100.00

2.45

0.11

100.00

0.60

PNF126, NC

100.00

1.62

100.00

1.88

0.12

100.00

0.25

PRK134, WI

100.00

1.42

100.00

1.10

0.22

100.00

0.44

PSU106, PA

100.00

2.80

100.00

3.10

0.10

100.00

0.21

QAK172, OH

100.00

0.99

100.00

0.57

0.13

100.00

0.22

ROM206, CO

100.00

1.03

100.00

1.21

0.17

100.00

0.19

SAL133, IN

100.00

0.83

100.00

0.99

0.13

100.00

0.21

SAN 189, NE

100.00

0.47

100.00

0.43

0.06

100.00

0.10

SND152, AL

100.00

1.69

100.00

2.10

0.16

100.00

0.36

SPD111, TN

100.00

0.63

100.00

0.82

0.14

100.00

0.24

STK138, IL

78.85

8.12

79.81

5.85

2.08

86.54

2.05

SUM 15 6, FL

100.00

1.11

98.84

1.31

0.26

100.00

0.43

UVL124, MI

100.00

0.87

100.00

0.93

0.07

100.00

0.12

VIN140, IN

100.00

0.40

100.00

0.51

0.07

100.00

0.30

VPI120, VA

100.00

0.66

100.00

0.86

0.08

100.00

0.32

WSP144, NJ

100.00

1.08

100.00

0.95

0.13

98.90

0.64

WST109, NH

100.00

0.37

100.00

0.47

0.08

100.00

0.16

Notes: 1 Percentage of comparisons that pass the criteria listed in Table 5. Values falling below 90 percent are addressed in Table 15.

2	Absolute value of the average percent differences between the on-site transfer standard and the site monitor. Values exceeding the
criteria listed in Table 5 are addressed in Table 15.

3	90 percent confidence limit of the coefficient of variation. This should be less than or equal to the 7 percent single point QC check
critical criterion. Values exceeding this criterion are addressed in Table 15.

%D = percent difference
CL = confidence limit
ppb = parts per billion

Amec Foster Wheeler Project No. 6064150003

16

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 15 Ozone QC Observations for Fourth Quarter 2015

Site ID

QC Criterion

Comments

GAS153, GA

% Single Point QC Pass

The sample pump failed in late December. Associated data
will be invalidated.

STK138, IL

% Span Pass
Span %D

% Single Point QC Pass
% Zero Pass

There was a leak in the sampling system in early October.
Associated data were invalidated.

Notes: %D = percent difference

Amec Foster Wheeler Project No. 6064150003

17	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 16 Trace-level Gas QC Summary for Fourth Quarter 2015

Parameter

% Span
Pass1

Span

|%D |2

% Single
Point QC

Pass1

Single Point

QC |%D|2

Single
Point
QC CL3

% Zero
Pass1

Zero
Average
(ppb)2







BEL116

, MD







S02

97.30

3.26

94.59

3.39

1.13

100.00

0.50

NOy

92.50

5.77

95.00

5.13

0.83

97.56

2.26

BVL130, IL

S02

90.20

6.79

88.24

28.03

21.60

88.24

8.25

NOy

100.00

2.59

100.00

2.38

0.43

97.87

0.57

CO

97.73

3.25

79.55

10.71

4.56

90.70

14.11

HWF187, NY

NOy

100.00

1.41

100.00

2.18

0.36

98.00

0.71







PND165

WY







NOy

97.92

4.28

97.96

6.77

3.59

100.00

0.25







PNF126

, NC







NOy

100.00

5.18

97.73

5.95

0.51

100.00

0.34

ROM206, CO

NOy

100.00

1.53

100.00

2.27

0.38

97.87

0.59

Notes: 1 Percentage of comparisons that pass the criteria listed in Table 6. Values falling below 90 percent are addressed in Table 17.

2	Absolute value of the average percent differences between the supplied and observed concentrations. Values exceeding the criteria
listed in Table 6 are addressed in Table 17.

3	90 percent confidence limit of the coefficient of variation. This should be less than or equal to the 10 percent single point QC check
critical criterion. Values exceeding this criterion are addressed in Table 17.

%D = percent difference
CL = confidence limit
ppb = parts per billion

Table 17 Trace-level Gas QC Observations for Fourth Quarter 2015

Site ID

Parameter

QC Criterion

Comments

BVL130, IL

S02

% Single Point QC Pass
Single Point QC %D
Single Point QC CL
% Zero Pass
Zero Average

The analyzer malfunctioned in November.
Associated data were invalidated.

BVL130, IL

CO

% Single Point QC Pass
Single Point QC %D

The sample pump failed in November.
Associated data were invalidated.

Notes: %D = percent difference
CL = confidence limit

Amec Foster Wheeler Project No. 6064150003

18	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 18 Summary of Filter Blanks for 2015 (1 of 2)

Parameter Name

Detection

Limit
Total p,g

Total
Number

Number >
Detection
Limit

Average
Total p,g

Average
Absolute
Deviation

Maximum
Total |ig

FIELD BLANKS

Teflon-NH+4-N

0.500

414

0

0.500

0.000

0.500

Teflon- NOrN

0.200

414

4

0.200

0.001

0.288

Teflon- SO2"

1.000

414

0

1.000

0.000

1.000

Cl"

0.500

414

2

0.502

0.003

1.178

Ca2

0.150

414

7

0.151

0.003

0.453

Mg2+

0.075

414

1

0.075

0.000

0.078

Na+

0.125

414

3

0.126

0.002

0.525

K

0.150

414

3

0.172

0.044

8.680

Nylon- NOrN

0.200

440

0

0.200

0.000

0.200

Nylon - SO2"

1.000

414

0

1.000

0.000

1.000

Cellulose - SO2

2.000

414

44

2.124

0.223

9.295

LABORATORY BLANKS

Teflon-NH+4-N

0.500

102

0

0.500

0.000

0.500

Teflon- NO"3-N

0.200

102

0

0.200

0.000

0.200

Teflon- SO2"

1.000

102

0

1.000

0.000

1.000

Cl"

0.500

102

0

0.500

0.000

0.500

Ca2+

0.150

102

0

0.150

0.000

0.150

Mg2+

0.075

102

0

0.075

0.000

0.075

Na+

0.125

102

0

0.125

0.000

0.125

K

0.150

102

0

0.150

0.000

0.150

Nylon- NO"3-N

0.200

102

0

0.200

0.000

0.200

Nylon -SO2"

1.000

102

0

1.000

0.000

1.000

Cellulose -SO2

2.000

102

1

2.016

0.032

3.660

METHOD BLANKS

Teflon-NH+4-N

0.500

70

0

0.500

0.000

0.500

Teflon- NO"3-N

0.200

70

0

0.500

0.000

0.200

Teflon- SO2"

1.000

70

0

0.500

0.000

1.000

ci-

0.500

70

0

0.500

0.000

0.500

Ca2

0.150

71

0

0.493

0.000

0.150

Mg2+

0.075

71

0

0.493

0.000

0.075

Na+

0.125

71

0

0.493

0.000

0.125

K

0.150

71

0

0.493

0.000

0.150

Nylon- NO"3-N

0.200

98

0

0.357

0.000

0.200

Nylon -SO2"

1.000

72

0

0.486

0.000

1.000

Cellulose -SO2

2.000

69

0

0.507

0.000

2.000

Amec Foster Wheeler Project No. 6064150003

19	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 18 Summary of Filter Blanks for 2015 (2 of 2)

Parameter Name

Detection
Limit
Total p,g

Total
Number

Number >

Detection

Limit

Average
Total |ig

Average
Absolute
Deviation

Maximum
Total |ig

ACCEPTANCE TEST VALUES

Teflon-NH+4-N

0.500

216

0

0.500

0.000

0.500

Teflon- NO;-N

0.200

216

0

0.200

0.000

0.200

Teflon- SO2"

1.000

216

0

1.000

0.000

1.000

Cl"

0.500

216

0

0.500

0.000

0.500

Ca2

0.150

216

0

0.150

0.000

0.150

Mg2+

0.075

216

0

0.075

0.000

0.075

Na+

0.125

216

0

0.125

0.000

0.125

K

0.150

216

1

0.161

0.022

2.486

Nylon- NO;-N

0.200

200

0

0.200

0.000

0.200

Nylon -SO2"

1.000

200

0

1.000

0.000

1.000

Cellulose -SO2

2.000

270

0

2.000

0.000

2.000

Note: Cellulose filters are not analyzed for ambient N03. The blank results are used only for QC.

Amec Foster Wheeler Project No. 6064150003

20	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 19 Filter Packs Flagged as Suspect or Invalid

Site ID

Sample

Reason

First Quarter 2015

ALC188, TX

1502001-03

Potassium data
suspect and
flagged as invalid.

CAN407, UT

1505001-14

Insufficient flow
volume

CDR119, WV

1503001-16

Concentration data
suspect and
flagged as invalid.

CDZ171, KY

1507001-17

Insufficient flow
volume

GRS420, TN

1502001-36

Concentration data
suspect and
flagged as invalid.

KIC003, KS

1503001-44

Insufficient flow
volume

LAV410, CA

1506001-46

Flow system
malfunctioned

LRL117, PA

1502001-47
1503001-47
1505001-47

Concentration data
suspect and
flagged as invalid.

Second Quarter 2015

BUF603, WY

1517003-02

Insufficient flow
volume

FOR605, WY

1518003-03

Insufficient flow
volume

GLR468, MT

1518001-33

Insufficient flow
volume

HWF187, NY

1517001-40

Insufficient flow
volume

IRL14LFL

1516001-41

Insufficient flow
volume

JOT403, CA

1518001-42

Insufficient flow
volume

KIC003, KS

1519001-44

Insufficient flow
volume

MCK231, KY

1515001-50

Potassium data
invalidated

PND165, WY

1520001-60

Insufficient flow
volume

ROM206, CO

1520001-66

Insufficient flow
volume

STK138, IL

1520001-74

Insufficient flow
volume

Site ID

Sample

Reason

Third Quarter 2015

BEL 116, MD

1533001-09

Insufficient flow
volume

CAD150, AR

1530001-13

Insufficient flow
volume

DCP114, OH

1537001-26

Power failure resulted
in insufficient flow
volume

FOR605, WY

1531003-03

Insufficient flow
volume

JOT403, CA

1531001-42

Insufficient flow
volume

PNF126, NC

1531001-61

Power failure resulted
in insufficient flow
volume

PSU106, PA

1536001-63

Insufficient flow
volume

SHN418, VA

1536001-71

Insufficient flow
volume

VTN140, IN

1536001-80

Insufficient flow
volume

Fourth Quarter 2015

CNT169, WY

1545001-22
1546001-22

Insufficient flow
volume

DCP114, OH

1546001-26
1548001-26
1549001-26

Insufficient flow
volume

DIN431. UT

1541001-28
1543001-28
1544001-28

Insufficient flow
volume

FOR605, WY

1544003-03

Insufficient flow
volume

GRS420, TN

1541001-36
1542001-36

Insufficient flow
volume

JOT403, CA

1544001-42

Insufficient flow
volume

PAL 190, TX

1548001-55

Insufficient flow
volume

PND165, WY

1548001-60

Insufficient flow
volume

WFM007, NY

1541001-83
1542001-83

Suspect data

YEL408, WY

1541001-88

Insufficient flow
volume

YOS404,CA

1548001-89

Insufficient flow
volume

Amec Foster Wheeler Project No. 6064150003

21	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 20 Field Problems Affecting Data Collection

Days to Resolution

Problem Count

First Quarter 2015

30

230

60

8

90

3

Unresolved by End of Quarter

10

Second Quarter 2015

30

230

60

5

90

1

Unresolved by End of Quarter

33

Third Quarter 2015

30

337

60

15

90

3

Unresolved by End of Quarter

24

Fourth Quarter 2015

30

228

60

11

90

0

Unresolved by Date of Publication

13

Amec Foster Wheeler Project No. 6064150003

22	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 21 Field Calibration Failures by Parameter for 2015

Site ID

Parameter(s)

First Quarter 2015

BVL130, IL

Flow Rate



Temperature



Wind Direction

CHE185, OK

Solar Radiation

CKT136, KY

Temperature

CTH110, NY

Flow Rate

Second Quarter 2015

PAL 190, TX

Solar Radiation

Third Quarter 2015

BEL 116, MD

Wind Direction

CAD 150, AR

Flow Rate

Fourth Quarter 2015

ABT147, CT

Flow Rate

Note: Per CASTNET project protocols, data for all parameters except flow are flagged as
"suspect" (S) but still considered valid if the calibration criterion is not exceeded by
more than its magnitude (i.e., if within 2x the criterion). If flow calibrations fall within
2x the criterion, these data are adjusted per approved protocol described in the
CASTNET QAPP, (Amec Foster Wheeler, 2014). Please refer to Table 14 for
documentation of the QC failures affecting the validity of ozone data.

Amec Foster Wheeler Project No. 6064150003

23	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Table 22 Accuracy Results for 2015 Field Measurements

Parameter

Percent Within Criterion

Flow Rate

96.8

Wind Speed < 5 m/s

100.0

Wind Speed > 5 m/s

100.0

Wind Direction North

90.9

Wind Direction South

90.9

Temperature (0°C)

99.2

Temperature (ambient)

98.4

Delta Temperature (0°C)

100.0

Delta Temperature (ambient)

100.0

Relative Humidity

100.0

Precipitation

100.0

Solar Radiation*

81.8

Wetness (within 0.5 volts)

100.0

Notes: °C = degrees Celsius
m/s = meters per second

* = Per CASTNET project protocols, data are flagged as "suspect" (S) but still considered

valid if the calibration criterion is not exceeded by more than its magnitude (i.e., if within
2xthe criterion). All calibration failures reported in 2015 for the indicated parameters
were within 2xthe criterion with the exception of solar radiation at PAL190, TX.
Associated data were invalidated.

Amec Foster Wheeler Project No. 6064150003

24	Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report—Fourth Quarter 2015 with 2015 Annual Summary

Figure 1 PND165, WY 1-Minute Trace-level Gas Data (ppb) - September 14, 2015

Amec Foster Wheeler Project No. 6064150003

25

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report—Fourth Quarter 2015 with 2015 Annual Summary

Figure 2 PND165, WY 1-Minute Trace-level Gas Data (ppb) - September 15, 2015

Amec Foster Wheeler Project No. 6064150003

26

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report—Fourth Quarter 2015 with 2015 Annual Summary

Figure 3 Reference Standard Results for Fourth Quarter 2015 (percent recovery)

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Amec Foster Wheeler Project No. 6064150003

27

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report—Fourth Quarter 2015 with 2015 Annual Summary

Figure 4 Continuing Calibration Spike Results for Fourth Quarter 2015 (percent recovery)

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Amec Foster Wheeler Project No. 6064150003

28

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report—Fourth Quarter 2015 with 2015 Annual Summary

Figure 5 Replicate Sample Analysis Results for Fourth Quarter 2015 (percent difference)

















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Amec Foster Wheeler Project No. 6064150003

29

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report — Fourth Quarter 2015 with 2015 Annual Summary

Figure 6 Percent Completeness of Measurements for Second Quarter 2014 through Third Quarter 2015*

Average for Continuous Measurements						i

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Note: *Presents Level 3 data available during the fourth quarter of 2015

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Amec Foster Wheeler Project No. 6064150003

30

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report—Fourth Quarter 2015 with 2015 Annual Summary

Figure 7 Laboratory Control Sample Results for Fourth Quarter 2015 (percent recovery)

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1

Amec Foster Wheeler Project No. 6064150003

31

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report—Fourth Quarter 2015 with 2015 Annual Summary

Figure 8 Method Blank Analysis Results for Fourth Quarter 2015 (total micrograms)

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Amec Foster Wheeler Project No. 6064150003

32

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report—Fourth Quarter 2015 with 2015 Annual Summary

Figure 9 Laboratory Blank Analysis Results for Fourth Quarter 2015 (total micrograms)

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-------
EPA Contract No. EP-W-15-003

CASTNET Quality Assurance Report—Fourth Quarter 2015 with 2015 Annual Summary

Figure 10 Field Blank Analysis Results for Fourth Quarter 2015 (total micrograms)









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Amec Foster Wheeler Project No. 6064150003

34

Amec Foster Wheeler Environment & Infrastructure, Inc.


-------