EPA-450/4-80-034
Northeast Corridor Regional
Modeling Project Continuous
Non-methane Organic Compound
Data Collection
by
PEDCo Environmental, Inc.
11499 Chester Road
Cincinnati, Ohio 45246
Contract No. 68-02-3519
EPA Project Officer: Edward J. Hanks, Jr.
U.S. ENVIRONMENTAL PROTECTION AGENCY
Office of Air, Noise, and Radiation
Office of Air Quality Planning and Standards
Research Triangle Park, North Carolina 27711
November 1980
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This document is issued by the Environmental Protection Agency to report
technical data of interest to a limited number of readers. Copies are
available free of charge to Federal employees, current EPA contractors
and grantees, and nonprofit organizations - in limited quantities - from
the Library Services Office (MD-35), U.S. Environmental Protection Agency,
Research Triangle Park, North Carolina 27711; or, for a fee, from the
National Technical Information Service, 5285 Port Royal Road, Springfield,
Virginia 22161.
This report was furnished to the Environmental Protection Agency by
PEDCo Environmental, Inc., Cincinnati, Ohio 45246, in fulfillment of
Contract No. 68-02-3519. The contents of this report are reproduced
herein as received from PEDCo Environmental, Inc. The opinions, findings
and conclusions expressed are those of the author and not necessarily
those of the Environmental Protection Agency.
Publication No. EPA-450/4-80-034
ii
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CONTENTS
Figures
Tables
1. Introduction
2. Calibration Procedures
Introduction
NMOC calibration
Oxides of nitrogen calibration
3. Quality Assurance Program
Introduction
Daily zero and span checks
Precision checks
Systems audit
Data validation and audit
4. Data Summary
Introduction
Boston area sites
New York City area sites
Baltimore area sites
Washington D.C. area sites
Appendix A Local Operators Standard Operation Procedure (SOP)
Appendix B Hourly Average Reports
TV
v
8
8
9
14
16
16
16
20
20
45
46
46
49
50
52
53
55
66
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Number
1
2
3
4
5
6
FIGURES
Boston Area Monitoring Sites
New York City Area Monitoring Sites
Baltimore and Washington, D.C. Area Monitoring Sites
Calibration Data Form
Daily Check Sheet
Daily Zero-Span Data Sheet
Page
4
5
6
10
17
18
IV
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TABLES
Number
3
4
5
6
Site Locations - Northeast Corridor Regional Modeling
Project Continuous Non-methane Organic Compound Data
Col lection
NMOC Calibration Gas Concentrations as Certified by
U.S. EPA
1980 NECRMP Precision Check Program
Northeast Corridor NMOC Audit Summary
Northeast Corridor Audit Summary
Northeast Corridor Data Capture Summary
21
38
44
47
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SECTION 1
INTRODUCTION
During the period from June 1, 1980 to September 12, 1980 the U.S. EPA
implemented an extensive field monitoring program in the Boston, Baltimore,
New York City and Washington, D.C. areas. This monitoring program was to
provide support for the development of effective and equitable ozone control
in the Northeast Urban Corridor. Monitoring data provide essential inputs
for application of the SAI Urban Air Shed Model (UAM) which can be used to
evaluate alternative control scenarios.
The Urban Air Shed Model (UAM) is a mathematical model that simulates
the complex physical and chemical processes that have been determined to be
important in the formation of photochemical oxidants. This model employs a
sophisticated emission inventory routine for mobile and stationary sources
of non-methane organic compounds (NMOC) and oxides of nitrogen (NO ) emis-
sions. Meteorological input includes hourly measurements of wino* speed,
wind direction and mixing height for a number of locations in the area. The
UAM requires input data for parameters appropriate to the chemical reaction
scheme. Finally, the UAM requires continuous air quality measurement data
to specify initial and boundary conditions.
The development of an equitable ozone precursor control strategy for
the Northeast Corridor is contingent upon the availability of a photochemi-
cal model. While the UAM has been successfully applied in a number of
areas, it is important to ascertain its applicability to the unique condi-
tions that exist in the Northeast Corridor. An adequate data base of con-
tinuous NMOC data is paramount to the determination of the applicability of
the UAM to this area of the country.
PEDCo was contracted to install and operate MSA model 11-2 non-methane
organic compound (NMOC) continous analyzers at 17 locations throughout the
Northeast Corridor. Additionally, PEDCo was contracted to operate two
continuous oxides of nitrogen (NO-NO ) analyzers (Bendix model 8101B) in the
Baltimore-Washington area.
The majority of the sites used during the project were existing air
monitoring sites operated by state and local air pollution control agencies.
Four sites in the New York City area were located and installed by PEDCo;
these were the Brooklyn (N10), Queens (N12), New Brunswick (N2), and the
Newark (N7) sites. The location of the monitoring sites and the analyzers
used at the sites are shown in Table 1 and Figures 1, 2, and 3.
AVI equipment necessary for the monitoring network was delivered to the
sites in mid-May. The installation of the sites began immediately there-
after. The four Boston sites (Ml, M2, M4 and M5) were all installed and
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NEW SITES
EXISTING SITES
Figure 1. Boston area monitoring sites.
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EAST
BRUNSWICK
N2
NEW SITES
A EXISTING SITES
Figure 2. New York City area monitoring sites,
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@ NEW SITES
A EXISTING SITES
Figure 3. Baltimore and Washington D.C. area monitoring sites
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calibrated by the end of May. The New York City area sites took somewhat
more time to install and calibrate. Three of the sites, N2, N7 and N8 were
on line by the end of May or early June. Site N7 was delayed until June 6,
1980, as a result of relocating the site from a trailer in Newark operated
by the State of New Jersey, to Faculty Memorial Hall at the New Jersey
Institute of Technology. The initial site was found to be unsatisfactory
due to its proximity to a newspaper printing plant. Site N10 in Brooklyn
was installed by the first of June, however, instrument malfunctions pre-
vented the instrument from becoming operational until June 17, 1980.
Site N6 in Linden, New Jersey came on line on June 20, 1980. This site
was delayed because of problems another contractor encountered in obtaining
a trailer and the necessary electrical connections for the site.
Site N12 in Queens, New York came on line on June 23, 1980. This site
was delayed due to long and unsuccessful negotiations with Consolidated
Edison concerning locating the site at their Astoria Power Plant. After
another series of negotiations, the site was located at the Steinway Post
Office at 4304 Broadway Avenue, Long Island City, New York.
The three Baltimore sites, B3, B5 and B6 were all installed and on-line
by the end of May. Sites W3 and W5 were both on line by the first week in
June, Site W2 in Prince William County, Virginia was not on line until June
15, 1980, because of a defective printed circuit board. Site W9 at Fort
Meade, Maryland, was not on line until July 8, 1980 due to problems the
State of Maryland had in obtaining a trailer and the necessary electrical
connections for the site.
Calibration procedures, quality assurance activites, and a discussion
of the data can be found in the subsequent sections.
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SECTION 2
CALIBRATION PROCEDURES
2.1 INTRODUCTION
The NMOC and NO-NO analyzers were scheduled to be calibrated approxi-
mately every two weeks, however, this schedule was not always met. This was
due primarily to instrument malfunctions, the necessity of accompanying the
auditor during the two system audits and the distances between some of the
sites.
Every effort was made to calibrate each site within the prescribed time
frame. However, priority was given to those sites which were subject to
downtime or drifting out of calibration. Those sites which did not exhibit
excessive_drift were given a lower priority and were calibrated after the
problem sites had been serviced and calibrated.
The calibration procedure used for the NMOC analyzers is based upon a
procedure developed by the U.S. EPA prior to the start of the project. The
EPA calibration procedure was used for the startup of the monitoring net-
work. Apparently the procedure, which involved the closing of a bleed
regulator on the moisture trap, caused condensation within the instrument,
especially when it was sampling high humidity atmospheres. The condensation
would then clog the flow restrictors in the burner assembly and cause the
flames to become unstable and eventually be extinguished.
After consultation and approval of both EPA and MSA PEDCo decided to
modify both the procedure and the instrument. A second moisture trap, two
valves, two pressure gauges, and a sight tube were installed. The valves
were set to maintain a 10 psi pressure differential between the two moisture
traps. This would serve to "squeeze" out the majority of the moisture in
the air being sampled. Water that accumulated in the first moisture trap
was drained by the local operator during the daily site visit.
The procedure was then modified to reflect the addition of the second
moisture trap. The closing of the moisture trap bleed regulator was made
permanent, not just during the calibration. By eliminating the bleed flow,
the condensation problem was stabilized because no changes in pressure were
made during either calibrations or daily zero/span checks. Additionally,
this reduced the sample flow and helped to conserve the calibration gases.
All of the above modifications were in place by July 1, 1980.
8
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2.2 NMOC CALIBRATION
2.2.1 Calibration Equipment
The NMOC analyzers were calibrated using EPA certified methane and
propane calibration gases. The gases were certified both prior to and after
the completion of the project. There were negligible changes in the concen-
trations of the tanks. Table 2 lists the tanks and certified concentra-
tions.
TABLE 2. NMOC CALIBRATION GAS CONCENTRATIONS
AS CERTIFIED BY U.S. EPA
Cyl. No.
BAL 1222
BAL 1214
BAL 1201
BAL 1207
BAL 1236
Concentration
4/30/80
248 ppm C3H8
250 ppm C3H8
754 ppm CH4
752 ppm CH4
749 ppm CH4
10/14/80
249 ppm C3H8
249 ppm C3H8
748 ppm CH4
748 ppm CH4
746 ppm CH4
These gases were then diluted
porous plug dilution system.
Serial No. RTI-PE-103. Flows
bubblemeter, Serial No. 505.
2.2.2 Calibration Procedure
with compressed air (<0.01 ppm HC) using a
The system used throughout the project was
were measured with a Hastings NBS traceable
The following is the stepwise procedure used to calibrate the MSA 11-2
NMOC continuous analyzer. The analyzer should be allowed to warm up for
approximately 24 hours prior to calibration.
NOTE: The analyzer was calibrated and operated with
the electrometer in the subtraction mode.
4).
All calibration data was recorded on a calibration data form (Figure
1. Check the sample pressure gauges inside the oven against the
values given on the data sheet. Measure the flow rate at each
backpressure regulator; it should be approximately 1 cfh (0.5
L/min). If necessary, adjust the CH4 or NMOC sample adjust valves
to provide the correct flow.
NOTE: Check gauges and backpressure regulator vent flows in
the oven as quickly as possible to minimize the disruption
of thermal equilibrium inside the oven.
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NORTHEAST CORRIDOR REGIONAL MODELING PROJECT CONTINUOUS NON-METHANE
ORGANIC COMPOUND DATA COLLECTION - PN 3489
CALIBRATION DATA FORM FOR MSA MODEL 11-2 HYDROCARBON ANALYZER
Site:
Date:
Analyzer S/N:
Analyzer off line at:
Analyzer on line at:
NOTES:
Snubber RTI-PE #
Bubble Meter #
Zero Air Cyl #
CHa Cyl f
C3H8 Cyl #
Temperature °C
Barometric Pressure
ppm
ppm
" Hg
Analyzer Pot Settings: Zero NMOC
Span NMOC
CH4
Correction Factor for Temperature, Barometric Pressure, and Vapor Pressure of
Water:
L
298
29.92
METHANE CALIBRATION:
Dilution flow:
psi
CH4 Zero
Correction factor
NMOC Zero
1000
x (
Point: Pollutant pressure:
SCCM Zero Air
_ psi Toggles 1 2 3
10
x (
SCCM CH.
ppm CH.
% Chart CH.
% Chart NMOC
#2 Point: Pollutant pressure:
psi Toggles 1 2 3
10
x (
SCCM CH.
ppm
X Chart CH.
% Chart NMOC
#3 Point: Pollutant pressure:
10
( )
H ;
x (
_ psi Toggles 1 2 3
SCCM CH.
ppm CH4
% Chart CH.
% Chart NMOC
Figure 4.
10
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#4 Point: Pollutant pressure:
10
psi Toggles 1 2 3
7
( )
SCCM CH.
ppm CH4
% Chart CH.
CH4 SLOPE:
INTERCEPT:
% Chart NMOC
CORK:
NMOC CALIBRATION:
Dilution flow: psi CH4 Zero
( ) = SCCM Zero Air
NMOC Zero
1000
F! Point: Pollutant pressure:
10 .. , , _
psi Toggles 1 2 3
SCCM
J
ppm C3H8
% Chart CH.
% Chart NMOC
?2 Point: Pollutant pressure:
10. . - / \ -
psi Toggles 1 2 3
r
T
SCCM C,H0
J O
ppm C3Hg
% Chart CH.
% Chart NMOC
?3 Point: Pollutant pressure:
10 „ , ,
psi Toggles 1 2 3
SCCM C3H8
ppm C3H8
% Chart CH.
% Chart NMOC
#4 Point: Pollutant pressure:
10
psi Toggles 1 2 3
( T
SCCM
ppm C3H8
NMOC SLOPE:
% Chart CH4 % Chart NMOC
INTERCEPT: CORR:
Figure 4.
n
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2. Place the HI/LO range switch in the LO position.
3. Place the stream selector valve in the ZERO position and allow
sufficient time for the meter pointer or recorder to stabilize.
4. Adjust both ZERO controls (channels 1 and 2) to obtain an appro-
priate baseline reading for both the CH4 and NMOC channels. The
baseline should be set at approximately 5%.
5. Connect the zero air source to be used during calibration to the
analyzer by means of a calibration manifold or "tee".
6. Place the stream selector valve in the SAMPLE position and allow
sufficient time for the meter pointer or recorder to stabilize.
7. Compare this value with the zero value obtained using the zero air
that will be used during the calibration. Note any differences.
8. Upon initial setup the balance controls, located in the oven, are
adjusted to their maximum (clockwise) position.
9. With the stream selector valve in the SAMPLE position, introduce a
high CH4 concentration (between 70 and 95% of the upper range
limit).
10. When the CH4 channel reading has stabilized, unlock the CH4 span
control (channel 2) and adjust it to provide the correct reading
based on the CH4 calibration gas concentration, as follows:
[CH4]
recorder reading (% chart) = ( r^r- x 100) + Z
UKL
where: [CH4] = the CH4 calibration concentration in ppm C
URL = Upper Range Limit (10 ppm C)
Z = Zero offset in % of chart
11. If this results in a span control setting over approximately 300,
decrease the CH4 hydrogen pressure slightly to increase the CH4
sensitivity; this should result in a lower span control setting.
NOTE: If the CH4 burner response increases by increasing the
hydrogen pressure, the burner is operating on the wrong
side of its peak response curve, and the hydrogen pressure
should be increased until the response decreases with
increasing hydrogen pressure.
12. Lock the CH4 span control and adjust the NMOC span control to the
same setting and lock it.
13. If the hydrogen pressure was adjusted, recheck the zero values and
adjust if necessary.
12
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14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
If the NMOC response (channel 1) is greater than or less than the
baseline set in Step 4, the two channels are not properly
balanced. If the channels are balanced, proceed to Step 19.
If the NMOC response is greater than the baseline, reduce the NMOC
response by adjusting the NMOC balance control (located in the
oven) counter clockwise until the NMOC response equals the base-
line.
If the NMOC response is less than the baseline, increase the NMOC
response by reducing the hydrogen pressure to the NMOC burner (No.
1) until the NMOC response equals the baseline.
If any adjustments as described in Steps 15 and 16 are made, it is
necessary to recheck the zero values, and adjust if necessary.
Then reintroduce the CH4 high concentration and recheck the CH4
and NMOC span control settings to insure that the adjustments made
in Steps 15 and 16 have not affected these readings. Adjust the
span controls if necessary. Record the final CH4 recorder res-
ponse on the calibration data form.
If the NMOC response is still not equal to the baseline value set
in Step 4, repeat the balancing procedure in Steps 15 and 16.
Introduce three additional CH4 concentrations to establish linear-
ity. These concentrations should be approximately equally spaced
over the scale range.
For each CH4 concentration record the CH4 (channel 2) recorder
response on the calibration data sheet and determine the calibra-
tion curve.
Introduce a high propane concentration (between 70 and 95% of the
upper range limit).
When the NMOC reading (channel 1) has stabilized, unlock the NMOC
span control and adjust it to provide the correct ppm C reading
based on the propane calibration gas concentration, as follows:
recorder reading (% chart) = ([Ca[1g?x3 x 100) + Z
UKL
where: [C3H8] = the propane calibration concentration in ppm
p u rr
^3i>S
URL = Upper Range Limit (10 ppm C)
Z = Zero offset in % of chart
Lock the NMOC span control (channel 1) and record the C3H8 concen-
tration and recorder response on the calibration data form, and
recheck the zero values on both channels.
13
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24. Introduce three additional propane (C3H8) concentrations, spaced
equally over the scale range, into the analyzer to establish
linearity.
25. For. each CsHg concentration record the recorder response on the
calibration data sheet and determine the calibration curve.
26. Record all dial settings on the calibration data form.
27. Disconnect the calibration line and connect the sampling line.
Record on both strip charts the time that the analyzer was put
back on line.
28. Perform a zero and span check. Record values on daily zero/span
data sheet.
2.3 OXIDES OF NITROGEN CALIBRATION
2.3.1 Calibration Equipment
The two oxides of nitrogen (NO-NO ) analyzers that were operated by
PEDCo were Bendix Model 8101-B equipped with Perma-Pure dryers. The
instrument serial numbers and their locations are listed in Table 1. These
analyzers were scheduled to be calibrated every two weeks, however, for
various reasons this schedule was not met. The analyzers were calibrated as
frequently as time permitted and the quality of the data dictated.
The calibration unit was a Bendix Model 8861DA Gas Phase Titration
(GPT) Calibrator, serial number 4658-3, EPA number 153353. Both the NO and
NO channels were calibrated simultaneously by dilution using a 99 ppm NO
calibration gas. The concentration of the NO calibration gas was certified
by the U.S. EPA. Nitrogen dioxide (N02) concentrations were determined by
subtraction of the NO response from the NO responses.
P\
2.3.2 Calibration Procedure
The following is a stepwise procedure used to calibrate the Bendix
8101-B Oxides of Nitrogen Analyzer. All calibration data was recorded on
the calibration data form shown in Figure 4. A separate NO-NO calibration
data form was not developed due to time constraints at the start of the
project.
The calibration apparatus used meets the requirements specified in
Appendix F of 40 CFR Part 50 as amended on December 1, 1976 (41FR52686).
1.
2.
Connect the
manifold.
AMBIENT SAMPLE IN line to the vented calibration
Adjust the dilution air flow and the
generator to obtain an excess flow.
air flow through the ozone
14
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3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Place the MODE selector switch to the AMBIENT position.
Place the NO, N02, and N0y PPM FULL SCALE range selector to the
0.5 ppm range.
Place the VALVE selector switch to the N0-N02-N0 position.
s\
Allow the analyzer to sample zero air from the calibration system.
(The NO source should be vented to exhaust.)
Allow the instrument to run until a stable zero response is
obtained to ensure that there is no zero drift.
Adjust the NO and NO ZERO adjustment controls so that the
recorder responses are oTfset by +5% of scale.
Adjust the NO flow rate to generate an NO concentration of about
90% of the upper range limit of the NO range.
Unlock the NO SPAN adjustment control and adjust the control to
obtain the recorder reading which correctly indicates the amount
of the known NO concentration plus the 5% zero offset.
Unlock the NO SPAN adjustment control and adjust the control to
obtain the recorder reading which correctly indicates the known
NO concentration plus to 5% zero offset.
/\
If there is substantial adjustment of the NO or NO span adjust-
ment controls, repeat Steps 6 through 11. If tftere is not a
substantial adjustment, record the recorder readings on the cali-
bration data sheets and lock the SPAN controls.
Generate three (3) additional NO concentrations evenly spaced
across the remaining 0-0.5 ppm range. Plot the analyzer responses
taken from the NO and NO strip chart recorders and plot or cal-
culate the NO and NO calibration curves. Record all recorder
responses on the calibration data form.
Introduce a high N02 concentration (approximately 0.4 ppm gener-
ated by gas phase titration) to check the converter efficiency.
15
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SECTION 3
QUALITY ASSURANCE PROGRAM
3.1 INTRODUCTION
Throughout the project several quality assurance activities were per-
formed. These included a daily zero and span check, a two point precision
check that was performed three times a week, two system audits that were
performed by the EPA Contractor Research Triangle Institute (RTI) during the
project, and a data audit, performed on the data after it has been reduced.
The following sections will detail the above mentioned QA activities.
3.2 DAILY ZERO AND SPAN CHECKS
Each day during the project the monitoring sites were visited by the
local operators to perform the daily checks. These checks were not to be
done between the hours of 6 a.m. and 9 a.m. EST. The daily checks were
recorded on the Daily Check Sheet (Figure 5). The daily zero/span checks
were performed according to the Standard Operating Procedure (SOP) (Appendix
A) developed prior to the monitoring period. The zero/span system utilized
a needle flow controller and a system of "quick connect" valves to connect
the appropriate cylinder to the analyzer. The zero and span values obtained
were marked on the strip chart and recorded on the daily check sheet and the
Daily Zero/Span Data Sheet (Figure 6). Zero and span values were also
plotted on the reverse side of the Daily Zero/Span Data Sheet. Any time
zero or span values were ± 10 percent of the calibration zero (including 5%
offset) or span values, the local operators contacted the Project Manager in
Cincinnati, the information was then relayed to the Field Project Manager.
This communication system was also used whenever the instrument malfunc-
tioned and the local operators could not restore the instrument to the
proper operating mode.
Due to a delay in obtaining the NO-NO span gases the span checks were
not begun until mid-July. No additional zero-span check sheets were pre-
pared for the NO-NO analyzers, the span checks were recorded on the daily
check sheets in addition to a periodic review of the charts by the field
project manager.
As can be seen from the Daily Check Sheet (Figure 5) the local operator
was also responsible for making routine checks on the instrument, strip
chart recorders and gas cylinders. An additional check on the moisture
traps was added during the study period and therefore was not incorporated
onto the Daily Check Sheet, however, it is detailed in the SOP (Appendix A).
The completed Daily Check sheets have been forwarded to the Project Officer.
16
-------
NORTHEAST CORRIDOR REGIONAL MODELING PROJECT
CONTINUOUS NON-METHANE ORGANIC COMPOUND
DATA COLLECTION
PN 3489
DAILY CHECK SHEET
Site
Date
Operator
Analyzer serial No.
CHART READINGS AT TIME OF ARRIVAL
Ch. 1
Time of arrival
Departure_
Ch. 2
Is recorder chart paper in proper time synchronization?
YES NO (if NO, adjust and note on strip chart)
INSTRUMENT SETTINGS:
ZERO dial Ch. 1 Ch. 2
SPAN dial Ch. 1 Ch. 2
Oven temp (50-55°)
Oxidizer temp (320-350°)
Cutter temp (250-260°)
FLAME OUT INDICATORS
Ch. 1 ON OFF
Ch. 2 ON OFF
[on face of instrument]
H2 #1 regulator
H2 #2 regulator (psig)
If temp, is out-of-range call PEDCo
Project Manager IMMEDIATELY
E. Mull in (513) 782-4700
If indicator is ON consult SOP and call
PEDCo Project Manager IMMEDIATELY
(psig) Air regulator
(psig)
Adjust air press, to 20 psig if
necessary and note on check sheet
CYLINDER PRESSURES (read the dial with the higher pressure scale)
Hydrogen (1000 psig) precis, ck #1
Zero air (1000 psig) precis, ck #2
Span gas (700 psig)
If pressure is less than indicated level call PEDCo Project Manager IMMEDIATELY
DAI_LY ZERO SPAN CHECK*
"- ZERO value Ch. 1 Ch. 2
SPAN value Ch. 1 Ch. 2
*If ZERO and/or SPAN value is greater than or less than 10% of the
indicated value call the PEDCo Project Manager IMMEDIATELY
E. Mull in (513) 782-4700
Operators signature
Figure 5.
17
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19
-------
3.3 PRECISION CHECKS ;
A two point precision check for the NMOC analyzers only, was carried
out at each site three times a week. These checks were performed after 9
a.m. EST and on a Monday, Wednesday and Friday basis. The precision check
data were recorded on data forms supplied by the U.S. EPA. The completed
forms were returned to the U.S. EPA shortly after completion of the monitor-
ing. Table 3 lists the precision point data and the gas cylinders that were
located at each site. At the site containing the colocated analyzers, Site
N7, only the primary analyzer (SN 2056) was checked using the precision
check gas. This was done in order to conserve the precision check gas and
ensure that the gas would be available for the duration of the study.
Site W9, at Fort Meade, had only one precision check gas cylinder
because the second cylinder was moved to Site B3 in Baltimore when cylinder
No. BAL 175 became empty before site W9 was operational. Several cylinders
in the New York area were relocated after several days so that each site
would have both a high and low concentration precision check gas.
The precision check program was begun shortly after the cylinders were
received in the study area, which was approximately the first of July. The
precision check data was forwarded to the U.S. EPA shortly after completion
of the monitoring.
3.4 SYSTEMS AUDIT
The NMOC monitoring network was audited twice during the study period
by the EPA contractor Research Triangle Institute (RTI). Table 4 lists the
audit results for all the sites that were audited. Several New York area
sites were not audited during the first round of audits; this was due to a
combination of instrument malfunctions and time constraints.
On the final system audit all sites were audited. As can be seen on
Table 4, Site N2 at Cook College was audited three times. The final audit
took place after the analyzer had been moved from Cook College to the U.S.
EPA, Region II Laboratory in Edison, New Jersey as space was no longer
available at Cook College for the two-week extension of the monitoring.
The NO analyzers located at B3 and W5, were also audited by RTI. The
results of T;he audit can be found on Table 5. These audits took place at
the same time as the NMOC audits, with exception of B3 where the NO
analyzer was audited on June 12, 1980 while the NMOC analyzer was audited on
July 18, 1980.
As can be seen on Table 5, audit values for several instruments
exceeded a 15 percent difference. In most cases this was a result of a
difference in the instrument zero and the audit zero which caused a large
difference at the low concentrations. This was not detected with the daily
span checks as the spans were a high concentration CH4 and C3H8 mixture.
These sites were calibrated as soon after the audit as possible. The data
collected during the period between the audit and the calibration was eval-
20
-------
TABLE 3. 1980 NECRMP.PRECISION .CHECK PROGRAM
Site: Ml, North Easton, MA
Week of
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1
2*
3
1
2
3
1
2
3
1
2*
3*
I
2
3
1
2
3
1
2
3
1
2
3
1
2*
3
1
Cylinder No. BAL-1073
CH4
(ppm c)
2.18
2.08
2.28
2.28
3.50
3.55
3.55
3.55
3.60
3.65
3.70
3.60
3.60
3.54
3.42
3.42
3.46
3.37
3.37
3.32
3.27
3.22
3.02
3.07
-
2.97
2.97
2.93
3.62
3.57
3.62
NMOC
(ppm c)
4.02
4.05
4.02
4.02
2.43
2.40
2.55
2.40
2.40
2.64
2.34
2.34
2.34
3.03
3.18
3.21
3.12
3.15
3.18
3.18
3.21
3.21
3.45
3.45
-
3.45
3.42
3.48
2.49
2.55
2.55
Cylinder No. BAL-842
CH4
(ppm c)
8.77
8.52
8.62
8.67
9.89
9.84
9.89
9.89
9.89
9.84
9.89
9.89
9.89
9.79
-
9.54
9.64
9.64
9.60
9.59
9.52
9.63
9.38
9.34
_
9.30
9.35
9.30
>10.05
10.05
10.05
NMOC
(ppm c)
>10.02
>10.02
>10.02
>10.02
9.66
9.57
9.72
9.66
9.60
9.84
9.48
9.51
9.57
10.53
-
10.80
10.77
10.77
10.83
10.77
10.80
10.77
>10.92
>10.92
_
10.91
10.91
>10.92
9.69
9.87
9.90
New calibration relationship.
21
-------
TABLE 3 (continued)
Site: M2, Medfield, MA
Week of
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/19/80
9/1/80
9/8/80
Precision
check No.
1
2
3
1
2*
3
1
2
3
1
2
3
1
2*
3
1
2
3
1*
2
3
1
2
3
1
2
3
1
2
3
Cylinder No. BAL-1004
CH4
(ppm c)
3.68
4.59
3.59
3.70
3.36
3.45
3.49
3.36
3.41
3.55
3.41
3.36
3.45
3.44
3.34
3.49
3.34
3.34
3.31
3.69
3.49
3.38
3.30
3.49
-
3.36
3.38
3.33
3.18
3.33
NMOC
(ppm c)
2.19
3.63
2.46
2.43
2.61
2.52
2.46
2.52
2.52
2.46
2.67
2.67
2.61
2.70
2.76
2.91
2.79
2.85
2.79
2.91
2.55
2.76
2.82
2.64
-
2.70
2.70
2.70
2.82
2.70
Cylinder No. BAL-1123
CH4
(ppm c)
>9.93
>9.93
>9.93
>9.93
9.51
9.81
9.91
9.66
9.86
>9.96
9.41
9.41
9.51
9.94
9.74
9.69
9.53
9.48
9.75
9.70
>10.29
9.93
9.72
10.23
-
9.99
9.99
9.82
9.51
9.93
NMOC
(ppm c)
8.64
>10.05
9.54
9.63
10.02
10.02
9.87
10.08
10.02
9.72
10.14
10.02
10.14
10.50
>10.53
>10.53
>10.53
10.23
>10.62
>10.62
9.96
>10.62
>10.62
10.50
-
10.56
10.62
>10.62
>10.62
>10.62
New calibration relationship.
22
-------
TABLE 3 (continued) t
Site: M4, Watertown, MA
Week of
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3*
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
Cylinder No. BAL-1117
CH4
(ppm c)
3.14
3.02
3.15
-
3.02
3.56
3.26
3.51
3.46
3.46
3.51
3.51
3.51
3.56
3.53
3.38
3.63
3.92
3.56
3.51
3.52
2.29
3.49
2.74
-
3.43
3.45
3.43
3.58
3.48
3.38
NMOC
(ppm c)
2.31
2.34
2.43
_
2.64
2.67
2.58
2.58
2.52
2.58
2.64
2.64
2.58
2.52
2.76
2.76
2.70
2.67
2.40
2.40
2.46
1.02
2.49
2.46
_
2.46
2.46
2.49
2.46
2.49
2.46
Cylinder No. BAL-1211
CH4
(ppm c)
8.43
8.03
7.98
_
8.33
9.87
9.22
9.87
9.82
9.77
9.87
9.87
9.87
9.87
9.75
9.40
>9.89
>9.89
>9.89
>9.89
>9.89
9.89
>9.89
>9.89
_
9.85
9.82
9.88
9.85
9.88
NMOC
(ppm c)
8.04
7.74
7.71
_
9.66
9.45
9.45
9.66
9.45
9.45
9.51
9.51
9.51
9.45
9.81
9.69
9.69
9.60
9.51
9.39
9.36
9.39
9.45
9.39
_
9.39
9.39
9.39
9.45
9.45
New calibration relationship.
23
-------
TABLE 3 (continued)
Site: M5, East Boston, MA
Week of
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1
2
3
1
2
3
1
2
3
1
2*
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
Cylinder No. BAL-931
CH4
(ppm c)
3.05
3.44
3.45
3.45
3.40
3.35
3.55
3.30
3.30
3.30
3.30
3.35
3.30
3.25
3.28
3.26
3.26
3.26
3.18
3.21
3.18
3.40
3.21
3.40
3.19
3.17
3.25
3.21
3.21
3.50
NMOC
(ppm c)
2.94,
1.14T
2.79
2.97
2.82
2.97
2.97
2.88
2.97
2.97
2.88
2.82
2.88
2.91
2.88
2.85
2.91
2.85
2.94
2.82
2.91
2.79
2.94
2.70
2.88
2.91
2.79
2.79
2.88
2.40
Cylinder No. BAL-251
CH4
(ppm c)
>9.95
9.85
9.75
9.90
9.90
9.85
>9.95
9.80
9.85
9.80
9.60
9.80
9.80
9.74
9.74
9.64
9.74
9.74
9.64
9.66
9.69
9.89
9.74
>9.89
9.69
9.67
9.79
9.74
9.68
>9.89
NMOC
(ppm c)
>9.90,
1.14r
>9.90
>9.90
>9.90
>9.90
>9.90
>9.90
>9.90
>9.90
>9.90
>9.90
9.90
>9.75
>9.75
>9.75
>9.75
>9.75
>9.75
9.75
>9.75
>9.75
>9.75
>9.75
9.78
9.81
>9.75
>9.75
>9.75
9.69
1 Instrument malfunction.
* New calibration relationship.
24
-------
TABLE 3 (continued)
Site: N2, Cook College, New Brunswick, NJ
Week of
6/30/80
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1*
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2*
3
1
2
3
1
2*
3
1*
2
3
1
Cylinder No. BAL-1086
CH4
(ppm c)
3.33
3.33
3.63
3.25
3.26
3.41
3.28
3.39
3.37
3.43
-
3.30
3.31
3.31
3.29
3.31
3.25
3.34
3.21
3.15
3.25
3.11
3.11
3.63
3.65
3.62
-
3.79
3.42
3.31
3.38
3.21
3.21
3.23
NMOC
(ppm c)
3.27
3.57
3.27
3.09
3.09
3.15
3.15
3.21
3.30
3.48
-
3.51
3.60
3.57
3.57
3.51
3.48
3.39
3.48
3.48
3.48
3.42
3.54
2.73
2.73
2.61
-
2.70
2.64
2.64
2.67
2.67
2.73
2.88
Cylinder No. BAL-12163
CH4
(ppm c)
3.26
3.27
3.63
3.26
3.26
Cyl. No.
9.98
9.88
9.93
9.91
9.98
_
9.86
9.93
9.92
9.93
9.93
9.86
9.93
9.79
9.86
9.85
9.65
9.56
>9.86
>9.86
>9.86
-
>9.86
9.86
9.71
9.92
9.73
9.72
9.68
NMOC
(ppm c)
3.30
3.36
3.27
3.09
3.06
BAL-10843
>9.66
>9.66
>9.66
>9.66
>9.66
_
>9.66
>9.66
>9.66
>9.66
>9.66
>9.66
>9.66
>9.66
>9.66
>9.66
>9.66
>9.48
>9.48
>9.48
>9.48
-
>9.48
9.90
9.90
9.96
9.96
10.02
10.17
Cylinder No. BAL-1084 replaced cylinder No. BAL-1216 on July 10, 1980.
New calibration relationship. 25
-------
TABLE 3 (continued)
Site: N6, Linden, NJ
Week of
6/30/80
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1*
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1*
2
3
1
2
3
1
2
3
1
2*
3
1
Cylinder No. BAL-1098
CH4
(ppm c)
3.74
3.93
3.48
3.29
3.27
3.18
3.27
3.13
3.25
3.67
3.10
3.16
3.13
3.13
3.25
3.16
3.23
3.32
3.19
3.07
3.10
3.75
3.63
3.60
-
3.66
3.64
3.61
3.59
3.57
3.52
3.53
3.58
3.57
NMOC
(ppm c)
2.91
2.76
2.94
2.91
2.85
2.97
2.94
2.97
3.00
2.91
3.03
3.03
3.12
3.18
3.03
3.21
3.00
3.24
3.06
2.94
3.24
2.49
2.37
2.43
-
2.64
2.58
2.58
2.52
2.55
2.43
2.52
2.55
2.61
Cylinder No. BAL-11423
CH4
(ppm c)
3.76
3.99
3.49
3.34
3.27
Cyl. No.
9.71
9.82
9.72
9.72
>10.06
9.71
9.73
9.59
9.62
9.80
9.64
9.72
9.76
9.64
9.54
9.54
>10.23
10.20
10.18
-
10.19
10.18
10.13
10.11
10.13
10.07
10.10
10.13
10.15
NMOC
(ppm c)
2.88
2.79
2.91
2.88
2.88
BAL-9719
9.93
>9.93
>9.93
>9.93
>9.93
9.87
>9.93
>10.02
>10.02
9.99
>10.02
>10.02
>10.02
9.93
9.78
>10.02
9.81
9.75
9.75
-
9.99
9.93
9.90
9.90
9.87
9.78
9.87
9.93
9.99
Cylinder No. BAL-971 replaced Cylinder No. BAL-1142 on July 10, 1980.
New calibration relationship.
26
-------
TABLE 3 (continued)
Site: NJIT, Newark, NJ
Week of
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80 ,
8/18/80
8/25/80
9/1/80
9/8/80
. 9/13/80
Precision
check No.
1
2
3
1
2
3*
1
2
3
1
2
3
1*
2
3
1
2
3
1
2*
3
1
2
3
1
2
3
I
2
3*
1
Cylinder No. BAL-9713
CH4
(ppm c)
9.85
9.62
8.25
Cyl. No.
1.86
1.79
3.39
3.15
3.32
3.37
3.42
3.49
3.46
3.31
3.27
3.29
3.31
3.42
3.48
3.45
3.40
3.39
3.39
3.33
3.31
-
3.10
3.16
3.21
3.22
3.33
3.29
NMOC
(ppm c)
>10.02
>9.93
>9.93
BAL-11423
2.52
2.52
2.64
2.49
3.03
2.61
2.49
2.52
2.61
2.46
2.40
2.46
2.49
2.40
2.43
2.58
2.64
2.61
2.64
2.61
2.61
_
2.58
2.67
2.61
2.61
2.82
2.76
Cylinder No. BAL-1101
CH4
(ppm c)
>10.16
9.70
8.28
8.22
8.08
9.47
9.19
9.45
9.66
9.83
>9.96
>9.96
>9.59
>9.59
>9.59
>9.59
>9.59
>9.59
>9.59
>9.79
>9.79
>9.79
9.77
>9.79
_
9.13
9.36
9.53
9.48
9.78
9.71
NMOC
(ppm c)
>9.93
>9.93
>9.93
>9.93
>9.93
9.69
9.57
9.66
9.69
9.75
>9.78
>9.78
>9.51
>9.51
>9.51
>9.51
>9.51
>9.51
>9.51
>9.54
>9.54
>9.54
>9.54
>9.54
_
>9.58
9.58
>9.54
>9.54
>9.99
>9.99
Cylinder No. BAL-1142 replaced Cylinder No. BAL-971 on July 14, 1980.
* New calibration relationship.
27
-------
TABLE 3 (continued)
Site: N8, Bayonne, New Jersey
Week of
6/30/80
*
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1
2
3
1
2
3*
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3*
1
2
3
1
2
3
1
2
3
4
1
Cylinder No. BAL-1204
CH4
(ppm c)
3.38
3.39
3.33
3.34
3.48
3.27
3.45
3.37
3.46
3.65
3.51
3.33
3.27
3.22
3.59
3.66
3.59
3.59
3.59
3.65
3.51
3.90
3.85
3.59
3.54
3.67
3.64
3.77
3.92
3.92
3.79
3.81
3.76
3.82
4.01
NMOC
(ppm c)
2.91
2.82
2.85
2.73
2.73
2.73
2.73
2.73
2.61
2.40
2.43
2.49
2.52
2.67
2.58
2.52
2.58
2.49
2.41
2.40
2.49
2.16
2.31
2.58
2.61
2.82
2.79
2.91
2.85
2.94
2.97
2.91
2.58
2.58
2.58
Cylinder No. BAL-118
CH4
(ppm c)
>9.82
>9.82
9.79
9.79
>9.82
>9.82
>9.82
>9.82
>9.58
>9.58
>9.58
>9.58
9.53
>9.58
>9.58
>9.58
>9.58
>9.58
>9.58
>9.58
>9.58
>9.58
>9.59
9.99
9.89
9.93
>10.19
10.13
>10.19
10.19
10.07
10.11
10.12
10.11
10.19
NMOC
(ppm c)
>9.93
>9.93
>9.93
>9.93
>9.93
>9.93
>9.93
>9.93
9.69
9.27
9.42
9.51
9.57
>9.93
>9.93
>9.93
>9.93
9.66
9.60
9.54
9.66
9.09
9.45
9.99
10.14
>10.35
>10.35
>10.35
>10.35
>10.35
>10.35
>10.35
9.90
9.87
9.87
New calibration relationship.
28
-------
TABLE 3 (continued)
Site: N10, Brooklyn, New York
Week of
6/30/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1
2
3
1
2*
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3*
4
1
Cylinder No. BAL-1106
CH4
(ppm c)
3.67
3.66
3.73
3.08
4.10
3.99
4.38
3.59
3.65
3.64
3.70
3.67
3.61
3.76
3.73
3.67
3.70
3.70
3.70
3.65
3.75
3.59
3.64
3.62
3.65
3.76
3.60
3.60
3.71
3.59
3.47
3.47
NMOC
(ppm c)
2.70
2.70
2.58
2.79
2.40
2.43
2.67
2.79
2.97
2.79
2.79
2.70
.2.88
2.88
2.76
2.61
2.55
2.61
2.49
2.49
2.37
2.40
2.43
2.28
2.40
2.31
2.28
2.34
2.52
2.85
2.91
2.76
Cylinder No. BAL-248
CH4
(ppm c)
>9.98
>9.98
>9.98
>9.98
>9.98
>9.98
>9.98
10.13
-
10.12
10.27
10.01
10.05
9.94
10.13
10.06
10.08
10.10
10.03
9.98
10.18
9.95
10.03
9.97
10.07
10.00
9.38
9.84
9.82
10.08
10.15
9.89
NMOC
(ppm c)
9.75
9.69
9.45
9.42
9.00
9.09
>10.02
10.32
10.47
10.41
10.35
10.23
10.47
10.35
10.05
10.05
10.02
10.17
9.99
9.99
9.90
9.75
9.69
9.54
9.66
9.66
9.72
9.81
10.08
10.17
10.17
9.93
New calibration relationship.
29
-------
TABLE 3 (continued)
Site: N12, Queens, New York
Week of
6/30/80
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1
2
3
1
2
3*
1
2
3
1
2
3*
1
2
3
1
2
3
1
2*
3
1
2
3
1
2
3
1
2
3*
4
1
Cylinder No. BAL-1106
CH4
(ppm c)
>9.91
>9.91
-
-
>9.91
Cyl. No.
5.65
5.85
-
3.41
3.89
3.84
•3.99
-
3.86
3.72
3.81
3.89
3.98
4.10
4.21
4.25
4.30
3.71
3.81
3.90
3.92
4.02
-
4.12
4.22
4.19
4.32
3.55
3.65
3.65
NMOC
(ppm c)
>12.39
>12.39
-
_
>12.35
BAL-12163
3.75
0.87
-
4.44
3.54
2.79
3.69
-
3.51
3.27
3.33
3.45
3.12
2.79
2.61
2.43
2.37
3.36
3.30
3.30
3.21
3.45
-
3.12
2.94
2.49
2.31
3.30
3.51
3.63
Cylinder No. BAL-248
CH4
(ppm c)
>9.91
>9.91
-
_
>9.91
>9.91
>9.91
-
10.22
>10.36
>10.36
>10.36
-
10.58
10.19
>10.19
>10.19
>10.19
>10.19
>10.19
>10.19
>10.19
10.02
>10.08
>10.08
>10.08
>10.08
-
>10.08
>10.08
>10.08
>10.08
10.06
10.11
10.08
NMOC
(ppm c)
>12.39
>12.39
-
_
>12.35
>12.35
10.95
-
11.88
11.28
9.96
9.30
_
10.08
>11.07
>11.07
>11.07
>11.07
11.01
10.89
9.99
>11.07
>10.95
>10.95
>10.95
>10.95
>10.95
-
>10.95
>10.95
>10.95
10.68
>10.89
>10.89
>10.89
Cylinder No. BAL-1216 replaced cylinder No. BAL-1084 on July 10, 1980.
30
-------
TABLE 3 (continued)
Site: B3, Read Street, Baltimore, Maryland
Week of
6/29/80
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
1*
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1*
2
3
1
2
3
1*
2
3
1
2
3
1
Cylinder No. BAL-1221
CH4
(ppm c)
3.46
3.62
3.62
5.84
3.62
3.71
3.72
3.81
3.72
3.80
-
3.32
3.52
3.62
3.81
3.64
3.64
3.70
3.67
-
3.78
4.12
-
3.58
3.46
3.54
3.65
3.75
3.75
3.40
3.55
3.65
NMOC
(ppm c)
3.06
2.82
2.82
3.03
2.97
3.96
2.46
3.75
3.09
3.24
_
2.67
4.05
3.60
2.76
3.96
3.03
3.39
3.03
_
3.12
3.12
_
2.76
2.97
3.48
2.70
2.85
2.55
2.85
3.03
2.73
Cylinder No. BAL-175
(BAL-128)
CH4
(ppm c)
9.89
10.28
10.18
10.28
10.18
10.07
10.08
10.18
a
-
_
10.17
10.07
10.17
10.18
10.18
10.18
9.89
10.18
_
10.42
10.42
_
8.35
8.39
8.50
7.99
8.76
10.36
9.64
9.95
10.33
NMOC
(ppm c)
10.26
10.26
10.35
10.26
10.35
10.44
10.56
10.35
a
-
_
9.54
>10.26
>10.26
>10.26
>10.26
10.26
>10.26
9.96
—
9.42
9.63
_
8.97
9.36
10.23
7.80
8.28
9.72
10.65
10.65
9.99
Cylinder No. BAL-175 was empty; replaced with No. BAL-128 on July 30, 1980.
* New calibration relationship.
31
-------
TABLE 3 (continued)
Site: B5, Guilford and 22nd Street, Baltimore, MD
Week of
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1
2
3
1
2
3
1*
2
3
1
2
3
1
2
3
1
2
3
1
Cylinder No. BAL-1020
CH4
(ppm c)
3.07
3.25
3.19
3.22
3.25
3.26
3.24
3.25
3.22
3.22
3.21
3.20
3.16
3.20
3.20
3.19
3.19
3.23
NMOC
(ppm c)
2.85
9.39
3.06
3.27
3.09
3.03
3.30
3.12
3.27
3.03
3.24
3.36
3.03
3.03
3.03
3.00
3.03
3.00
Cylinder No. BAL-1225
CH4
(ppm c)
8.82
9.67
9.63
9.59
9.64
9.67
9.56
10.74
9.53
9.58
9.56
9.51
9.51
9.53
9.57
9.54
9.55
9.62
NMOC
(ppm c)
9.96
10.38
10.44
10.86
10.53
10.26
10.86
10.32
>10.77
10.20
>10.77
>10.77
10.35
10.29
10.35
10.29
10.29
10.74
* New calibration relationship.
32
-------
TABLE 3 (continued)
Site: B6, Essex, Maryland
Week of
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
Precision
check No.
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2*
3
1
2
3
1
2
3
1
2
3
1
2
3
Cylinder No. BAL-1087
CH4
(ppm c)
_
-
3.44
3.50
3.35
2.90
2.94
3.34
3.33
3.24
3.29
3.24
3.24
3.29
3.24
3.75
2.97
-
3.66
-
3.50
3.55
3.54
3.54
3.44
-
3.50
3.44
3.44
3.44
NMOC
(ppm c)
_
-
2.49
2.40
2.49
2.19
2.67
2.67
2.67
2.73
2.67
2.79
2.52
2.34
2.40
2.49
2.43
-
3.09
-
2.91
2.76
2.40
2.34
2.50
-
2.64
2.64
2.94
2.88
Cylinder No. BAL-1235
CH4
(ppm c)
_
-
9.90
10.00
9.80
9.90
9.90
9.69
9.71
9.59
9.64
9.59
9.51
9.71
9.64
9.59
10.18
-
10.41
_
10.30
10.30
10.30
10.39
10.20
-
10.25
10.20
10.09
10.20
NMOC
(ppm c)
_
_
9.63
9.33
9.78
8.94
>9.93
>9.93
>9.93
>9.93
>9.93
>9.93
>9.93
9.42
9.60
9.72
9.09
-
9.54
_
>10.11
9.81
9.12
9.03
9.33
_
9.51
9.57
9.78
9.84
New calibration relationship.
33
-------
TABLE 3 (continued)
Site: W2, Camp Upshur, VA
Week of
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
Precision
check No.
1
2
3
1
2
3
1*
2
3
1*
2
3
1
2
3
1
2
3*
1
2
3
1
2
3
1
2
3
1
2
3
Cylinder No. BAL-1103
CH4
(ppm c)
_
-
3.51
3.37
-
-
3.52
2.81
-
3.58
3.50
3.56
3.56
-
3.57
3.35
3.26
3.25
3.26
3.25
-
3.59
3.54
3.47
3.20
3.20
3.68
3.15
3.68
—
NMOC
(ppm c)
-
-
3.03
3.21
-
-
3.27
3.03
-
2.88
2.82
3.27
2.97
-
2.94
2.79
2.94
2.91
3.00
2.88
-
2.94
3.00
3.18
3.09
3.15
3.15
3.45
2.76
—
Cylinder No. BAL-1198
CH4
(ppm c)
-
-
9.91
9.73
-
-
>9.99
9.03
-
>10.06
9.94
>10.06
9.98
-
>10.01
9.88
9.79
9.53
9.51
9.50
9.50
9.79
9.79
9.68
8.96
9.04
9.52
9.54
>9.79
~
NMOC
(ppm c)
-
-
>9.99
>9.99
-
—
>10.47
9.96
—
>10.17
9.96
>10.17
>10.17
-
>10.17
>10.17
>10.17
>9.81
>9.81
>9.81
>9.81
>9.81
>9.81
>9.81
>9.81
>9.81
>9.81
>9.81
>9.81
™
New calibration relationship.
34
-------
TABLE 3 (continued)
Site: W3, Aurora Hills Community Center, VA
Week of
6/30/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1
2
3
1
2
3
1
2
3
1*
2
3
1
2
3
1
2
3
1
2
3
1*
2
3
1
Cylinder No. BAL-1222
CH4
(ppm c)
-
3.66
3.26
-
3.78
3.89
-
3.56
-
3.56
3.60
3.55
3.47
3.72
-
3.87
3.60
-
3.61
3.60
3.83
3.60
3.69
-
3.68
-
3.64
3.62
NMOC
(ppm c)
_
1.68
1.77
-
2.34
2.40
-
2.28
-
2.31
2.31
2.37
2.31
2.73
-
2.76
2.70
-
2.79
2.79
2.82
2.70
2.70
-
2.67
-
2.61
2.61
Cylinder No. BAL-447
CH4
(ppm c)
_
>10.07
9.27
_
9.56
10.78
8.41
9.95
10.05
10.16
10.23
10.12
10.06
10.46
-
10.54
10.19
10.42
10.24
10.24
10.62
10.27
10.38
-
10.45
-
10.54
10.49
NMOC
(ppm c)
_.
8.31
8.01
_
8.94
8.94
6.42
8.34
8.16
8.61
8.61
8.64
8.37
10.23
-
10.17
10.23
10.38
10.47
10.50
10.38
10.17
10.11
-
10.02
-
10.11
10.23
* New calibration relationship.
35-
-------
TABLE 3 (continued)
Site: W5, West End Library, Washington, D.C.
Week of
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
2
3
1
2
3
1
2
3
1
2
3
1
2*
3
1
2
3
1
2
3
1
2
3
1
2
3
1
Cylinder No. BAL-1233
CH4
(ppm c)
3.88
3.60
3.52
3.88
3.15
3.42
3.21
3.13
3.13
3.45
3.19
3.21
3.29
3.16
3.15
3.33
3.33
3.37
3.52
3.53
3.31
3.41
3.25
3.28
2.57
NMOC
(ppm c)
2.61
2.58
2.73
2.58
2.70
2.70
2.70
2.70
2.70
2.64
2.64
2.70
2.67
2.70
2.73
2.61
2.64
2.64
2.52
2.61
2.64
2.55
2.61
2.70
3.30
Cylinder No. BAL-1226
CH4
(ppm c)
9.83
8.70
9.34
9.25
7.99
7.10
6.41
5.65
9.37
8.67
9.04
9.08
8.62
8.20
7.90
8.59
9.51
9.27
9.60
9.75
9.74
9.53
9.69
9.57
9.99
9.81
9.91
9.96
NMOC
(ppm c)
9.48
9.30
9.06
8.49
8.31
8.52
6.39
5.52
9.84
9.72
9.12
9.33
8.49
8.28
8.19
9.81
>9.96
9.81
9.54
9.69
9.69
9.09
9.39
9.57
9.69
9.84
>9.96
9.96
New calibration relationship.
36
-------
TABLE 3 (continued)
Site: W9, Fort Meade, Maryland
Week of
7/7/80
7/14/80
7/21/80
7/28/80
8/4/80
8/11/80
8/18/80
8/25/80
9/1/80
9/8/80
9/13/80
Precision
check No.
1
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
Cylinder No. BAL-1203
CH4
(ppm c)
9.85
9.90
>9.95
9.67
9.55
9.06
9.45
9.56
-
-
9.45
-
-
9.65
-
-
9.78
-
-
9.69
-
-
9.69
-
-
-
-
9.69
9.77
NMOC
(ppm c)
9.69
9.39
9.09
9.18
9.18
8.61
9.09
9.12
-
-
9.03
-
-
9.88
-
-
8.88
-
-
8.76
-
-
8.76
-
-
-
-
8.61
8.67
37
-------
TABLE 4. NORTHEAST CORRIDOR NMOC AUDIT SUMMARY
Site/date
Ml 7/15/80
8/23/80
M2 7/14/80
8/23/80
M4 7/14/80
Methane
Audit value
(ppm)
0.0
9.03
6.04
4.06
1.99
0.97
0.0
8.94
6.02
4.07
1.94
1.07
0.0
8.90
5.95
3.96
1.98
0.97
0.0
9.03
6.00
4.03
1.93
1.12
0.00
9.04
6.04
4.03
2.02
1.01
Response
(ppm)
0.10
9.20
6.15
4.06
1.98
0.89
0.44
8.39
5.49
3.53
1.47
0.59
0.05
Off scale
6.94
4.61
2.34
1.12
-0.03
9.40
6.22
4.12
1.97
1.10
-0.06
8.95
5.94
3.91
1.94
0.87
Percent
difference
_
+1.9
+1.8
0.0
-0.5
-8.2
_
-6.2
-8.8
-13.3
-24.2
-44.9
-
+16.6
+16.4
+18.2
+15.5
_
+4.1
+3.7
+2.2
+2.1
-1.8
-
-1.0
-1.7
-2.9
-4.0
-13.9
NMOC (propane)
Audit value
(ppm)
0.0
2.99
2.06
1.35
0.64
0.34
0.0
3.01
1.99
1.35
0.70
0.36
0.0
2.97
2.02
1.24
0.60
0.33
0.0
3.03
1.96
1.35
0.70
0.36
0.00
2.99
2.06
1.38
0.66
0.34
Response
(ppm)
0.0
2.78
1.89
1.23
0.56
0.28
0.14
3.21
2.15
1.51
0.86
0.50
-0.08
3.04
2.06
1.23
0.58
0.26
0.0
3.11
2.05
1.39
0.72
0.38
-0.01
2.92
2.01
1.34
0.64
0.32
Percent
difference
_
-7.0
-8.3
-8.9
-12.5
-17.6
_
+6.6
+8.0
+11.9
+22.9
+38.9
_
+2.4
+2.0
-0.8
-3.3
-21.2
—
+2.6
+4.6
+3.0
+2.9
+5.6
_
-2.3
-2.4
-2.9
-3.0
-5.9
(continued)
38
-------
TABLE 4 (continued)
Site/date
8/24/80
M5 7/14/80
8/25/80
N2 7/16/80
8/26/80
N2 9/8/80
Methane
Audit value
(ppm)
0.00
9.12
6.05
4.07
1.99
1.17
0.00
9.05
5.94
4.04
2.02
0.96
0.00
9.02
6.01
4.06
1.95
1.05
0.00
9.04
6.04
4.08
2.06
1.03
0.00
9.03
6.03
4.10
1.97
1.11
0.00
0.95
2.0
3.97
5.96
9.01
Response
(ppm)
-0.06
9.11
6.05
4.01
1.92
1.07
-0.02
9.17
5.95
3.97
1.94
0.88
0.16
8.98
5.93
3.93
1.80
0.88
+0.08
9.38
6.29
4.28
2.19
1.06
+0.06
9.19
6.14
4.17
2.40
1.15
-0.13
0.814
1.90
3.92
5.92
9.02
Percent
difference
_
-0.1
0.0
-1.5
-3.5
-8.5
-
+1.3
+0.2
-1.7
-4.0
-8.3
_
-0.4
-1.3
-3.2
-7.6
-16.2
_
+3.8
+4.1
+4.9
+6.3
+2.9
_
+1.8
+1.8
+1.7
+3.6
+3.6
-
-14.3
-5.0
-1.3
-0.6
+0.2
NMOC (propane)
Audit value
(ppm)
0.00
3.04
2.00
1.36
0.70
0.36
0.00
3.10
2.93
2.07
1.37
0.67
0.34
0.00
2.81
1.98
1.33
0.69
0.35
0.00
2.72
2.05
1.36
0.67
0.35
0.00
2.87
2.00
1.37
0.69
0.37
0.00
3.00
1.98
1.32
0.63
0.31
Response
(ppm)
-0.01
2.92
1.90
1.27
0.63
0.29
0.02
Off scale
3.04
2.15
1.43
0.68
0.36
+0.02
2.97
2.10
1.42
0.73
0.38
-0.07
2.70
2.02
1.31
0.62
0.27
-0.02
2.87
2.01
1.35
0.694
0.36
-0.02
3.02
1.99
1.31
0.61
0.29
Percent
difference
^ .
-3.9
-5.0
-6.6
-10.0
-19.4
_
+3.8
+3.9
+4.4
+1.5
+5.8
_
+5.7
+6.1
+6.8
+5.8
+8.6
_
-0.7
-1.4
-3.7
-7.4
-22.9
_
0.0
+0.5
-1.5
+0.6
-2.7
—
+0.7
+0.5
-1.0
-1.6
-5.2
(continued)
39
-------
TABLE 4 (continued)
Site/date
N6 7/16/80
8/26/80
N7(A)
8/21/80
N7(B)
8/21/80
N8 7/17/80
8/27/80
Methane
Audit value
(ppm)
0.00
9.06
6.05
4.07
2.01
1.07
0.00
8.95
5.95
4.05
2.02
1.16
0.00
8.99
6.01
4.10
2.02
1.00
0.00
8.99
6.01
4.10
2.02
1.00
0.00
8.99
5.95
3.98
1.94
0.96
0.00
9.02
6.10
4.12
1.93
1.12
Response
(ppm)
0.32
9.56
6.50
4.55
2.48
1.50
0.30
9.48
6.42
4.46
2.38
1.48
0.02
9.32
6.19
4.23
2.08
1.00
-0.01
9.43
6.27
4.26
2.07
0.96
+0.03
8.92
5.93
4.13
2.07
1.08
+0.09
9.08
5.94
4.02
1.93
1.09
Percent
difference
_
+5.2
+7.4
+11.8
+23.4
+40.2
-
+5.9
+7.9
+10.1
+17.8
+27.6
-
+3.7
+3.0
+3.2
+3.0
0.00
-
+4.9
+4.3
+3.9
+2.5
-4.0
_
-0.8
-0.3
+3.8
+6.7
+12.5
_
+0.6
-2.6
-2.4
0.0
-2.6
NMOC (propane)
Audit value
(ppm)
0.00
2.97
2.05
1.38
0.69
0.34
0.00
2.95
2.00
1.35
0.69
0.36
0.00
0.33
0.69
1.34
2.03
2.88
0.00
0.33
0.69
1.34
2.03
2.88
0.00
3.02
2.04
1.37
0.64
0.32
0.00
3.02
2.00
1.36
0.712
'0.365
Response
(ppm)
0.02
2.99
2.05
1.36
0.67
0.29
+0.02
3.02
2.04
1.38
0.706
0.367
0.01
0.32
0.70
1.36
2.06
2.95
-0.01
0.31
0.70
1.39
2.10
3.01
0.00
3.00
2.06
1.37
0.64
0.29
+0.04
3.09
2.05
1.40
0.746
0.381
Percent
difference
_
+0.7
0.0
-1.4
-2.9
-14.7
-
+2.4
+2.0
+2.2
+2.3
+1.9
-
-3.0
+1.5
+1.5
+1.5
+2.4
-
-5.5
+1.5
+3.7
+3.5
+4.5
_
-0.7
-0.9
0.0
0.0
-8.1
_
+2.3
+2.5
+2.9
+4.8
+4.4
(continued)
40
-------
TABLE 4 (continued)
Site/date
N10
8/21/80
N12
8/22/80
W2 7/25/80
9/3/80
W3 7/24/80
9/5/80
Methane
Audit value
(ppm)
0.00
8.84
5.99
4.02
1.95
1.10
0.00
8.95
6.18
4.10
2.00
1.13
0.00
1.11
2.15
4.17
6.21
8.91
0.00
9.01
6.00
4.08
1.98
1.10
5.95
0.00
1.19
2.15
4.17
6.21
8.99
0.00
8.96
5.94
4.09
2.02
0.99
Response
(ppm)
+0.20
9.08
6.24
4.24
2.10
1.24
0.10
8.97
6.21
4.12
2.09
1.18
0.12
1.26
2.24
4.29
6.38
9.13
+0.11
Off scale
6.79
4.40
2.06
1.11
6.55
-0.19
1.08
2.13
4.32
6.61
9.65
+0.07
10.41
6.84
4.71
2.35
1.13
Percent
difference
-
+2.7
+4.2
+5.5
+7.7
+12.7
-
+0.2
+0.5
+0.5
+4.5
+4.4
_
+13.5
+4.2
+2.9
+2.7
+2.5
_
-
+13.2
+7.8
+4.0
+0.9
+10.1
_
-9.2
-0.9
+3.6
+6.4
+7.3
_
+16.1
+15.2
+15.2
+16.3
+14.1
NMOC (propane)
Audit value
(ppm)
0.00
3.03
2.00
1.34
0.69
0.35
0.00
3.03
1.98
1.37
0.70
0.37
0.00
0.352
0.682
1.32
1.97
2.82
0.00
3.06
2.03
1.37
0.687
0.337
0.00
0.35
0.68
1.32
1.97
2.85
0.00
3.01
2.87
1.99
0.674
0.304
Response
(ppm)
-0.05
3.02
1.96
1.31
0.62
0.28
+0.01
3.33
2.18
1.49
0.77
0.402
+0.065
0.407
0.756
1.44
2.15
3.08
+0.08
Off scale
2.23
1.52
0.792
0.411
0.03
0.36
0.71
1.36
2.01
2.88
-0.02
Off scale
3.35
2.30
0.751
0.338
Percent
difference
_
-0.3
-2.0
-2.2
-10.1
-20.0
_
+9.9
+10.1
+8.8
+10.0
+8.1
_
+15.6
+10.9
+9.1
+9.1
+9.2
_
-
+9.9
+10.9
+15.3
+21.9
_
+2.9
+4.4
+3.0
+2.0
. +1.1
_
-
+16.7
+15.6
+11.4
+11.2
(continued)
41
-------
TABLE 4 (continued)
.'
Site/date'
W5 7/24/80
9/4/80
W9 7/9/80
8/28/80
B3 7/8/80
9/6/80
Methane
Audit value
(ppm)
0.00
1.09
2.10
4.08
6.11
8.81
0.00
9.07
5.96
4.08
2.06
1.06
0.00
9.05
6.04
4.01
2.04
0.99
0.00
8.97
5.91
4.03
1.94
1.07
0.00
9.10
8.40
6.0
3.9
2.0
1.0
0.00
8.99
6.02
3.98
1.94
0.98
Response
(ppm)
-0.35
0.85
1.90
4.07
6.28
9.25
0.13
Off scale
7.13
4.90
2.54
1.34
+0.31
9.24
6.27
4.31
2.38
1.31
0.00
8.91
5.92
4.00
1.94
1.04
+0.08
Off scale
9.40
0.80
4.5
2.2
1.2
0.22
9.71
6.78
4.42
2.20
1.09
Percent
difference
-
-22.0
-9.5
-0.2
+2.8
+5.0
_
-
+19.6
+20.1
+23.3
+26.4
_
+2.1
+3.8
+7.5
+16.6
+32.3
_
-0.6
+0.2
+0.7
0.0
-2.8
-
-
+11.9
+13.3
+15.4
+10.. 0
+20.0
_
+8.0
+12.6
+11.1
+13.4
+12.2
NMOC (propane)
Audit value
(ppm)
0.00
0.345
0.670
1.30
1.94
2.79
0.00
3.01
2.00
1.35
0.684
0.340
0.00
2.97
2.05
1.37
0.676
0.369
0.00
3.02
1.98
1.35
0.712
0.341
0.00
3.03
2.03
1.39
0.68
0.35
0.00
3.01
2.01
1.34
0.66
0.31
Response
(ppm)
-0.01
0.339
0.687
1.38
2.07
3.02
-0.01
Off scale
2.27
1.51
0.771
0.370
0.01
3.00
2.10
1.40
0.67
0.349
-0.03
2.95
1.96
1.30
0.673
0.299
+0.02
3.13
2.10
1.42
0.72
0.36
-0.03
3.13
2.06
1.36
0.66
0.29
Percent
difference
-
-1.7
+2.5
+6.2
+6.7
+8.2
-
+13.5
+11.9
+12.7
+8.8
-
+1.0
+2.4
+2.2
0.0
-5.4
-
-2.3
-1.0
-3.7
-5.6
-12.3
-
+3.3
+3.4
+2.2
+5.9
+2.9
-
+4.0
+2.5
+1.5
0.0
-6.5
(continued)
42
-------
TABLE 4 (continued)
Site/date
B5 7/9/80
9/7/80
B6 7/8/80
8/27/80
Methane
Audit value
(ppm)
0.00
9.07
6.12
4.04
1.97
0.97
0.00
9.03
6.02
4.05
2.02
1.02
0.00
8.8
6.0
4.2
2.1
1.0
0.00
8.92
6.00
4.06
1.98
1.06
Response
(ppm)
+0.02
9.38
6.35
4.17
2.03
1.01
-0.01
8.99
6.01
4.01
1.98
0.96
-0.02
9.14
6.30
4.3
2.2
1.0
+0.03
9.51
6.38
4.28
2.09
1.10
Percent
difference
-
+3.4
+3.8
+3.2
+3.0
+4.1
_
-0.4
-0.2
-1.0
-2.0
-5.8
_
+3.9
+5.0
+2.4
+4.8
0.0
_
+6.6
+6.3
+5.4
+5.6
+3.8
NMOC (propane)
Audit value
(ppm)
0.00
3.09
2.06
1.40
0.667
0.372
0.00
3.03
1.99
1.33
0.653
0.316
0.00
3.04
2.00
1.43
0.666
0.333
0.00
3.05
1.98
0.685
0.341
Response
(ppm)
-0.133
Off scale
2.18
1.41
0.582
0.238
+0.03
3.16
2.09
1.40
0.706
0.339
-0.01
3.10
2.00
1.40
0.646
0.295
-0.03
3.05
2.01
0.654
0.295
Percent
difference
_
+5.8
+0.7
-12.7
-36.0
_
+4.3
+5.0
+5.3
+8.1
+7.3
_
+2.0
0.0
-2.1
-3.0
-12.0
_
0.0
+1.5
-4.4
-14.7
43
-------
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44
-------
uated by both the field project manager and project manager and invalidated
if the data were found to be suspect on the basis of the daily zero and span
checks.
3.5 DATA VALIDATION AND AUDIT
PEDCo used a Summagraphics Series 2000 ID data tablet/digitizer to
reduce data directly from strip charts. A data technician positions the
strip chart on an electronic grid table and approximates the strip chart
trace by touching an electronic pen to several points on the curve for each
hour represented. The points, each representing a percent of chart, are
transmitted directly to the computer where they are translated into concen-
tration units and stored as hourly averages. The hourly averages are stored
by month for each site/parameter combination.
A data auditor checked 8 percent (2 hours out of every 24 hours) of the
data Deduced. The auditor, a data reduction supervisor, used the same
technique as the digitizer operator to reduce the data for the hours chosen
to be audited. If any value reduced by the auditor differed by 10 percent
or more from the corresponding value originally reduced by the digitizer
operator, the data for the entire day on which the difference was detected
was redigitized. This technique allowed PEDCo to detect procedural problems
with the data reduction technique. Although no formal guideline exists, the
8 percent checking level is mentioned in U.S. EPA quality assurance docu-
ments as a recommended minimal audit level.
45
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SECTION 4
DATA SUMMARY
4.1 INTRODUCTION
The data collected during the 1980 Northeast Corridor Non-methane
Organic Compound Data Collection Project are compiled in Appendix B, Hourly
Average Reports. The data are arranged by site, with the first and second
hourly maximums for each month also presented.
Data hours which are invalid due to instrument malfunctions, calibra-
tions, audits and daily zero and span checks are indicated by four nines
(9999). Data were invalidated if the daily zero and span values deviated
from the current calibration by more than 15 percent.
Daily averages are computed for each day that contains at least
seventy-five percent valid data. If a site contains less than seventy-five
percent the daily average is indicated by "9999".
Table 6 summarizes the percent data capture attained during the
project. It should be noted that due to the inclusion of daily zero and
span checks, calibrations and audits in the invalid data hours, the maximum
percent data capture is approximately 95 percent for the NMOC data. NO and
NO will have higher values for the first two months due to delays in the
start of the daily zero and span check program.
During the month of June the majority of the
affected by a common problem, the accumulation of
analyzer lines. This moisture caused a blockage
resulting in unstable measurements and eventually the
burners.
NMOC analyzers were
moisture within the
of flow restrictors
extinguishing of the
PEDCo believes that this problem was a result of the calibration and
zero-span procedures recommended by the U.S. EPA. This procedure required
the closing of the moisture trap regulator and subsequent readjustment of
the air pressure within the analyzer. When sampling high humidity atmo-
spheres this change in pressure would cause a sudden supersaturation of the
sample air and condensation within the analyzer sample lines.
PEDCo also believes that this problem was compounded by the fact that
the analyzers were new and perhaps not allowed an adequate break-in period
at the factory. This claim is supported by the fact that fourteen of the
eighteen analyzers experienced this problem and two of the four that did not
were analyzers that had been operated at U.S. EPA-RTP for several months.
46
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TABLE 6. NORTHEAST CORRIDOR DATA CAPTURE SUMMARY
Site
Ml
M2
M4
M5
N2
N6
N7A
N7B
N8
N10
N12
B3
B5
Parameter
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
NO
NOX
CH4
NMOC
June
16.8
30.6
49.7
18.8
82.9
52.6
57.4
58.1
88.1
84.6
33.2
33.1
62.6
59.3
tot on line
85.4
92.2
41.8
42.5
13.3
11.3
94.2
90.1
94.3
95.4
97.5
92.1
July
56.3
77.3
89.0
67.6
74.7
90.1
92.7
73.8
92.2
94.0
90.3
94.2
91.1
92.9
43.3*
43.4*
94.6
93.5
57.0
55.8
40.7
41.3
92.7
95.0
99.2
96.0
53.5
56.7
August
81.2
94.0
93.4
91.9
70.8
94.6
90.9
93.1
85.2
85.6
82.8
90.2
90.9
91.8
91.1
92.6
93.0
93.1
92.3
93.0
93.3
92.2
94.8
75.8
38.8
38.2
95.8
94.6
September
94.1
93.4
96.5
96.9
79.9
97.6
96.9
97.6
66.3
76.7
91.0
92.4
93.7
92.7
96.5
93.4
95.1
95.8
94.1
94.1
96.9
93.4
74.0
95.5
51.4
55.2
95.5
96.2
(continued)
47
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TABLE 6 (continued)
Site
B6
W2
W3
W5
W9
Parameter
CH4
NMOC
CH4
NMOC
CH4
NMOC
CH4
NMOC
NO
NOX
CH4
NMOC
June
58.6
57.8
34.2
34.2
15.1
18.3
0.0
0.0
66.1
68.9
Not on line
July
92.1
87.0
37.9
35.3
40.6
25.8
68.5
68.7
92.7
93.1
64.0*
70.8*
August
92.3
88.6
41.9
85.6
95.6
95.0
94.2
85.1
91.8
95.2
93.0
94.8
September
94.4
87.8
58.0
56.6
94.1
94.8
96.2
91.7
88.5
84.0
96.9
97.2
Not on line for entire month.
48
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The problem was finally corrected by installing an additional moisture
trap, two pressure gauges, and two flow adjustment valves. The valves were
set to maintain a ten-pound pressure drop between the two moisture traps.
The pressure differential effectively removed most of the moisture in the
sample air before entering the analyzer. After installation of this equip-
ment and an appropriate modification of the calibration procedure the
moisture problem did not recur.
The following subsections will
problems that occurred at each site.
discuss the invalid data and the
4.2 BOSTON AREA SITES
4.2.1 Site Ml. North Easton
Site Ml, located in North Easton, MA was put on line on May 31, 1980.
The instrument did not operate consistently during the month of June due to
the accumulation of moisture within the instrument. This problem was
corrected in late June.
The analyzer was operational throughout most of July. However, water
condensing in the sample line caused the flames to be extinguished several
times during the month. The largest time period affected by this problem
was July 26 to July 31. The problem was finally rectified by elevating the
pump and eliminating the blockage of the pump. The remainder of invalid
data hours in July is due to the daily zero-spans being out of limits.
With the exception of a recorder problem on the CH4 channel July and in
early August, the analyzer operated without any major problems for the
remainder of the study.
4.2.2 Site M2. Medfield
Site M2, located in Medfield, MA, was put on line on May 26, 1980. The
analyzer did not operate consistently during the month of June due to the
accumulation of moisture within the instrument and the subsequent blockage
of the air flow restrictors. This problem was corrected in late June by the
installation of an additional moisture trap and pressure valve.
The analyzer was operational throughout most of July, however, the NMOC
channel was out of limits in the early part of July, but was within limits
from approximately July 12 to the end of the month.
CH4 recorder problem on August 11, 1980, the
major problems during the months of August and
With the exception of a
analyzer operated without any
September.
4.2.3 Site M4. Watertown
Site M4, located in Watertown, MA, was put on line on May 28, 1980.
The analyzer did not operate consistently during the month of June due to
49
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the accumulation of moisture within the instrument. The moisture, while not
extinguishing the flames, affected the sample flow rates and therefore the
validity of the data as determined from the daily zero-span checks.
The analyzer operated throughout most of July. The CH4 channel was
subject to recorder malfunctions which caused the loss of data from July 4
to July 9, 1980. Several additional hours were invalid as a result of the
zero-spans being out of limits.
During August several flameouts between August 14 and August 17
resulted in the loss of several days of data. The CH4 channel recorder
experienced a malfunction from August 21 to August 24 resulting in a loss of
data. For the remainder of the study the analyzer was operational and did
not experience any major problems.
4.2.4 Site M5, East Boston, MA
Site M5, located in East Boston, MA, was put on line on May 29, 1980.
The analyzer operated during the first two weeks of June, but then both
channels were out of limits from the 15th to the 18th. From June 20 to June
27 the analyzer was down due to the accumulation of moisture within the
instrument and the subsequent blockage of the air flow restrictors. This
problem was corrected in late June by the installation of an additional
moisture trap and pressure valves.
The analyzer operated throughout the month of July. A recorder mal-
function on the NMOC channel resulted in the loss of data from July 7 to
July 13, 1980.
For the remainder of the study the analyzer did not experience any
major problems.
4.3 NEW YORK CITY AREA SITES
4.3.1 Site N2. Cook College
Site N2, located at Cook College in New Brunswick, NJ was put on line
June 2, 1980. The analyzer operated throughout the study period. There
were several times, however, where some invalid data hours occurred. On
July 22 to July 23, 18 invalid data hours occurred due to the flames going
out. Additionally, approximately 1 day of data was lost on August 11 and 12
due to an operator error.
A faulty .hydrogen generator was responsible for a loss of data on
August 27 and 28. The generator was temporarily repaired and continued to
operate until the site was moved on September 1, 1980 to the U.S. EPA Region
II Laboratory at Edison, N.J. The analyzer was put on line at the new loca-
tion on the morning of September 3, 1980 and was operated without problems
until the end of the study.
50
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4.3.2 Site N6. Linden
Site N6, located in Linden, New Jersey, was put on line June 20, 1980.
This delay was due to problems beyond PEDCo's control in locating the site.
The analyzer was operational throughout the study. The few invalid data
hours that did occur are as follows: July 22 and 23, 21 hours of CH4 data
were lost due to delay in switching chart paper. August 25 to 26, 10 hours
of data were lost when the circuit breakers at the site were tripped by
another contractor performing other monitoring work, and the flames were not
relit until the site operators visit the following day.
4.3.3 Site N7A and N7B, Newark
Sites N7 located at the New Jersey Institute of Technology, in Newark,
New Jersey contained two colocated analyzers, N7A and N7B.
The primary analyzer, N7A, was put on line on June 7, 1980, after being
relocated from the New Jersey state trailer.
The analyzer was operational during the month of June, however, several
days of data were invalidated due to zero-span checks being out of limits.
PEDCo believes that this problem was a result of both a moisture buildup in
the analyzer and high temperatures within the monitoring station. Both
problems were corrected by the end of the month.
During the remainder of the study period the analyzer operated without
any major problems. However, one day of data was lost on July 10 to July 11
due to an operator's error.
The colocated analyzer, N7B, was put on line on July 17, 1980. This
delay was due to the moisture problems that were prevalent throughout the
monitoring network during the month of June. Once on line the analyzer ran
for the duration of the study without any major problems.
4.3.4 Site N8. Bayonne
Site N8 located in Bayonne, New Jersey was put on line on May 23, 1980.
The site operated throughout the entire study without any major problem.
4.3.5 Site N10. Brooklyn
Site N10, located in Prospect Park in Brooklyn, New York was put on
line on June 1, 1980. The analyzer did not operate consistently during the
first two weeks of June due to electrical problems within the analyzer.
After this was 'repaired the analyzer operated from June 17 to July 6, 1980
when the flames went out as a result of a pump malfunction. This problem
was not able to be corrected until July 21, 1980. From that time on the
analyzer operated throughout the remainder of the study without any major
problems.
51
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4.3.6 Site N12, Queens
Site N12, located at the Steinway Post Office in Queens, New York, was
put on line on June 23, 1980. The installation of this site was delayed due
to negotiations with the post office which have been detailed in a previous
section.
The analyzer was operational throughout the study but was subject to a
high degree of zero drift on both the CH4 and NMOC channels. This was
responsible for the poor percent data capture from this site. The reason
for the drifting was never fully determined and is believed to be a combina-
tion of temperature fluctuations and variable flow rates due to sample line
problems.
4.4 BALTIMORE AREA SITES
4.4.1 Site B3. Read St.
Site B3, located at Read and Guilford Streets in Baltimore, MD, was put
on line on May 18, 1980. The NMOC analyzer was operational throughout the
entire study. The only major problem occurred in early August. The state
of Maryland would not allow us to connect the NMOC analyzer to their sample
manifold, therefore the sample line was run outside the trailer through an
opening in the roof. The normal cycling of the air conditioner caused a
positive pressure in the trailer, which forced trailer air out the roof
opening used for the NMOC sample line. This caused a contamination of the
air being sampled. The trailer air was high in nonmethane organic compounds
(ethylene) from the chemiluminescent ozone analyzer exhaust. This problem
was corrected by better securing the roof opening and the installation of an
oxidizer on the exhaust outlet of the ozone analyzer. It is not certain,
however, if the oxidizer was operated correctly or operated continuously for
the remainder of the study. Due to NECRMP operational responsibilities this
and other ethlyene oxidizing units were the responsibility of the state/
local agencies. A sample pump failure resulted in the loss of data between
August 25 and 26, 1980.
The oxides of nitrogen analyzer located at B3 was put on line on May
17, 1980. The analyzer operated continously throughout the study, however,
the sample line problem that was discussed concerning the NMOC analyzer also
affected the collection of NO and NO data. This problem was more pro-
nounced for NO/NO analyzer, as can be seen from Table 6. This problem was
finally correctedT>efore the end of the monitoring period.
4.4.2 Site B5. 22nd St.
Site B5 located at 22nd and Guilford Streets in Baltimore, Maryland,
was put on line on May 18, 1980. The analyzer operated continuously
throughout the study. The major problem encountered at this site involved
condensation within the sample line. The use of the existing manifold was
not permitted. It was therefore necessary to route the sample line through
a hole in the bottom of the trailer and then up to the trailer roof. As a
52
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result of this, flow through the sample line was reduced sometime during the
middle of July. This caused irregular analyzer response and eventually the
flames were extinguished when the blockage was complete. The problem was
corrected by re-routing the sample line and changing the location of the
sample pump and the analyzer recalibrated on July 30, 1980. There were no
other major problems throughout the remainder of the study.
4.4.3 Site B6, Essex
Site B6, located at Woodward and Franklin Streets in Essex, Maryland
was_put on line on May 19, 1980. The analyzer operated intermittently
during the month of June. From June 1 to June 13 the analyzer did not
operate due to condensation of moisture within the analyzer and the sub-
sequent blockage of the air flow restrictors. This problem was corrected in
late June by the installation of an additional moisture trap and
valve.
pressure
The analyzer was then operational throughout the remainder of the study
with just a few instances of invalid data hours, such as July 26 and 27 when
the daily zero and span checks were out of limits, a recorder malfunction on
August 5 and 6, and a flame out on August 16, 1980.
4.5 WASHINGTON, D.C. AREA SITES
4.5.1 Site W2. Camp Upshur
Site W2, located at Camp Upshur on the Quantico Marine Corps Reserva-
tion in Prince William County, Virginia, was put on line on June 15, 1980.
The analyzer was delayed due to a defective printed circuit board for the
oven. Once repaired the analyzer operated intermittently for various
reasons. On June 27, 1980 the flames went out due to a hydrogen generator
failure. The generator was replaced on July 10, 1980 with a new generator
supplied by the state of Virginia. On July 15, 1980 the air conditioning
system at the trailer broke and the analyzer was shut down to prevent over-
heating. The analyzer was returned to operation on July 21, 1980. Between
July 27 and July 28 the daily zero and spans were out of limits. The elec-
tricity to the site was out between August 5 and August 7, 1980.
The CH4 recorder malfunctioned on August 27, 1980 and was not
able. Therefore, only NMOC data was collected for the remainder
study. The air conditioner broke down again on September 10, 1980
not repaired until after the end of the study.
repair-
of the
and was
PEDCo believes that the problems at this site were due to fluctuating
voltage. For this reason, the state of Virainia was relnratinn th*
line voltage. For this reason,
site at the end of the study.
4.5.2 Site W3, Aurora Hills
i ia aiuc we re . uue uu i iuu uua Liny
of Virginia was relocating the
Site W3
Virginia, was
located at the Aurora Hills Community Center in Arlington,
put on line on June 3, 1980. The analyzer was not operational
53
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during the latter half of June. The flames went out on several occasions
(June 5 and June 16th) due to the condensation of moisture within the
analyzer. This subsequently caused a blockage of the flow restrictors and
the extinguishing of the flames. This problem was corrected by cleaning
and/or replacing the flow restrictors and the installation of an additional
moisture trap and pressure valves. This was completed and the analyzer
returned to operation by July 5, 1980. However, the analyzer went out again
on July 7, 1980. After relighting, the analyzer was operational for several
days before the daily zero-span checks drifted out of limits.
The analyzer was recalibrated on July 22, 1980, from this time on the
analyzer was operational and experienced no major problems for the duration
of the study.
4.5.3 Site W5, West End Library
Site W5, located at the West End Library at 24th and L Streets in
Washington, D.C. was put on line on June 6, 1980. The NMOC analyzer was not
operational during the month of June due to the condensation of moisture
within the analyzer lines. This subsequently caused a blockage of the flow
restrictors and the extinguishing of the flames. This problem was corrected
by cleaning and/or replacing the flow restrictors and the installation of an
additional moisture trap and pressure valves. This was completed by the end
of the first week of July, and the analyzer was operational by July 10,
1980. The NMOC analyzer did not have any major problems for the remainder
of the study.
The oxides of nitrogen analyzer located at Site W5 was put on line on
June 6, 1980 and was operational throughout the entire study without any
major problems. Some data was lost in June as a result of inking problems
with the recorder.
4.5.4 Site W9, Fort Meade
Site W9, located on Y Street in Fort George Meade, Maryland, was
brought on line on July 8, 1980. This site was delayed due to problems the
state of Maryland encountered in locating the trailer at Fort Meade.
Several days in early July were lost due to a recorder pen malfunction
on the CH4 recorder. The analyzer was then operational throughout the
remainder of the study without any major problems.
54
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APPENDIX A
LOCAL OPERATORS STANDARD
OPERATING PROCEDURES
55
-------
ZERO AND SPAN CHECK
STANDARD OPERATING PROCEDURE (SOP)
MSA-11-2 NMOC ANALYZER
After completing the daily checklist begin the zero and span
check according to the following stepwise procedure.
1. Check moisture trap No. 1 on the side of the instrument.
If it contains more than 1" of water open valve SLOWLY
and drain to a level of 1/4". Do not drain completely.
2. Check moisture trap No. 2, also on the side of the
instrument. If it contains more than 1/2" of water
open the toggle valve and drain.
3. Check both pressure gauge (No. 1 and No. 2). No. 1
should read approximately 40 psig. No. 2 should read
10 psig less than No. 1, adjust No. 2 if it does not.
4. Disconnect the "pump inlet" line from the sample mani-
fold to the vacuum side of the pump. Then connect the
"T-line" to the same fitting. CAUTION: Do not over-
tighten the connection, finger tight and then a 1/4
turn with the wrench should suffice.
5. Connect the zero stem to the "quick connect" side of
the "T-line". Check for excess flow through the open
end of the "T-line". Flow through the "T-line" may be
increased by turning the knob on the face of the regu-
lator clockwise. Decrease the flow by turning the knob
counter-clockwise.
6. Allow sufficient time (approximately 5 to 10 minutes)
for the analyzer to stabilize. Record the zero value
on the daily checklist, the daily zero/span data sheet
and plot the value on zero/span chart. Note - the „
pressure on the span and zero tank should be 60 Ib/in. .
7. Disconnect the zero stem and connect the SPAN stem to
the "T-line". Check for excess flow through the open
end of the "T-line". Flow through the "T-line may be
increased by turning the knob on the face of the regu-
lator clockwise. Decrease the flow by turning the knob
counter-clockwise.
56
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8. Allow sufficient time (approximately 5 to 10 minutes)
for the analyzer to stabilize. Record the span value
on the daily checklist, the daily zero/span data sheet
and plot the value on the zero/span chart.
9. If either value for both Channel 1 and Channel 2 are
off by more than the 10 percent indicated on the con-
trol chart call the PEDCo Project Manager, Ed Mullin
(513) 782-4700 immediately.
10. Disconnect the SPAN stem from the "T-line". If a
precision check is to be performed at this time con-
tinue with the SOP for precision checks, if not, then
proceed to Step 11.
11. Disconnect the "T-line" from the vacuum side of the
pump. Connect the pump inlet line to the pump fitting,
CAUTION: Do not overtighten the connection, finger
tight and a 1/4 turn with the wrench should suffice.
12. Label both the zero and span points on the strip
charts, record the time and date and sign both strip
charts.
57
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58
-------
PRECISION CHECK
STANDARD OPERATING PROCEDURE
The following procedure for precision checks is to follow
Step 10 of the ZERO and SPAN check SOP.
3.
4.
5.
Connect the precision check gas cylinder No. 1 (Precis.
Ck. No. 1) stem to the quick connect side of the "T-
line". Check for excess flow through the open end of
the "T-line". Flow through the "T-line" may be in-
creased by turning the knob on the face of the regula-
tor clockwise. Decrease the flow by turning the knob
counter-clockwise. Allow sufficient time (approximately
5 to 10 minutes) for the analyzer to stabilize. Record
the precision check point No. 1 valve on the form and
label the strip charts. Note - the pressure for the
precision span tanks should be 60 lb/in.2.
Disconnect the Precis. Ck. No. 1 stem and connect the
Precis. Ck. No. 2 stem to the "T-line". Check for
excess flow through the open end of the "T-line". Flow
through the "T-line" may be increased by turning the
knob on the face of the regulator clockwise. Decrease
the flow by turning the knob,counter-clockwise. Allow
sufficient time (approximately 5 to 10 minutes) for the
analyzer to stabilize. Record the precision check
point No. 2 valve on the form and label the strip
charts.
Disconnect the Precis. Ck. No. 2 stem from the "T-line".
Disconnect the "T-line" from the vacuum side of the
pump. Connect the "pump inlet" line to the pump
fitting. CAUTION: Do not overtighten the connection,
finger tighten and a 1/4 turn with the wrench should
suffice.
Label both precision points on the strip charts, record
the time and date, and sign both strip charts. NOTE:
If a zero and span check was also performed label these
points on the strip charts.
59
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RELIGHTING BURNER
STANDARD OPERATING PROCEDURE
If the flame out indicator is ON (the light will be on) the
burner(s) will need to be relit. The following stepwise proce-
dure should be completed before calling the PEDCo Project Manager,
Ed Mullin (513) 782-4700. If the burner does not relight easily,
call the PEDCo Project Manager.
1. Adjust the AIR regulator (on the face of the instru-
ment) to 5 to 10 psig.
2. Press the IGNITOR button (also the flame out indicator)
for a count of three. If the burner has been out
awhile, it will take several attempts to successfully
relight the burner.
3. If the burner does not ignite on the first try repeat 3
or 4 more times. NOTE: It will take several seconds
for the light to go out after the burner ignites.
4. Adjust the AIR regulator to 20 psig.
5. Record on all the strip charts which channel was relit
and when.
60
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ZERO AND SPAN CHECK
STANDARD OPERATING PROCEDURE (SOP)
BENDIX 8101B, NO-NOX ANALYZER
After completing the daily checklist begin the zero and
span check according to the following stepwise procedure.
1. Connect the zero/span line to the zero air tank.
2. Turn on zero air tank and adjust pressure to 20 psi.
3. Allow sufficient time (approximately 5 to 10 minutes)
for the analyzer to stabilize. Record the zero value
and mark the zero.response on the strip chart.
4. Turn off the zero air tank.
5. Disconnect the zero/span line from the zero tank and
connect the line to the span tank.
6. Turn on the span tank and adjust the pressure to 20 psi
7. Allow sufficient time (approximately 5 to 10 minutes)
for the analyzer to stabilize. Record the span value
and mark the span response on the strip chart.
8. Turn off the span tank.
9. Disconnect the zero/span line and connect it to the
zero tank. The zero line must be connected to a tank
between zero/span tanks.
10. Check that both the zero and span tanks are shut off.
11. Return the analyzer back on line and record the time
on the strip chart.
61
-------
NORTHEAST CORRIDOR REGIONAL MODELING PROJECT
NON-METHANE ORGANIC COMPOUND DATA COLLECTION
PN 3489
0 LOCAL OPERATORS CONTACT LIST °
Ed Mullin, Project Manager
PEDCo Environmental, Inc.
Cincinnati, Ohio 45246
(513) 782-4700
Home (513) 742-2741
Lawrence Elfers, Technical Advisor
PEDCo Environmental, Inc.
Cincinnati, Ohio 45246
(513) 782-4700 Home (513) 777-1061
Anthony Wisbith, Project Director
PEDCo Environmental, Inc.
Cincinnati, Ohio 45246
(513) 782-4700 Home (513) 877-2249
Ron Heavner, Field Project Manager
PEDCo Environmental, Inc.
*Contact through E. Mullin
Ed Hanks, Project Officer
U.S. EPA
Research Triangle Park, North Carolina 27711
(919) 541-5474
62
-------
Boston:
New York:
Baltimore-Washington;
Local Operators
Bioassay Systems Corp.
100 Inman St.
Cambridge, Massachusetts 02139
(617) 661-6888
William R. Davis, Jr.
3148 Clark Lane
S. Plainfield, New Jersey 07080
(201) 756-3549
Mike Korzemba
(201) 699-9746
Abdelhamid Boilberhane
5700 MacArthur Blvd., N.W.
Washington, D.C. 20016
(202) 362-2127
Sayah Nedjar
American University
Box 181 - Eagle Station
Washington, D.C. 20016
(301) 736-0396
63
-------
NORTHEAST CORRIDOR REGIONAL MODELING PROJECT
CONTINUOUS NON-METHANE ORGANIC COMPOUND
DATA COLLECTION
PN 3489
0 SITE LOCATIONS °
BOSTON
Ml
M2
M4
M5
North Easton Post Office
Rte. 138 and Main Street
North Easton, MA
Medfield State Hospital,
Medfield, MA
Victory Field
Watertown, MA
Boston Edison Substation
Berman Avenue
East Boston, MA
NEW YORK
N6
N7
N8
N2
Lower and Range Streets
Linden, N.J.
Faulty Memorial Hall
New Jersey Institute of Technology
Warren and Summit Streets
Neward, N.J.
Hudson Co. Park
Bayonne, N.J.
Meteorology Building
Cook College, Nichol Ave.
New Brunswick, N.J.
N10 Maintenance Building
Prospect Park
Brooklyn, N.Y.
64
-------
N12 Steinway Post Office
4304 Broadway
Long Island City, N.Y.
BALTIMORE-WASHINGTON D.C.
B3 Read St. and Guilford St.
Baltimore, MD
B5 Guilford St. and 22nd St.
Baltimore, MD
B6 Woodward and Franklin Sts.
Essex, MD
W2 Near Camp Upshur
on St. Rte. 646, 5 mi SE of
Nokesville, VA
W3 Aurora Hills Community Center
735 18th St. South
Arlington, VA
W5 West End Library
N.W. 24th and N.W. L. Street
Washington, D.C.
W9 Fort George Meade
Rec. Veh. Storage Compound
Fort George Meade, MD
65
-------
APPENDIX B
HOURLY AVERAGE REPORTS
NOTE: ALL TIMES ARE RECORDED IN EASTERN STANDARD TIME (EST)
66
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