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response factor is within 5 percent of the RFNMO calculated during the initial performance test (Section 5.2.4). Use the daily response factor (DRFNMO) for analyzer calibration and calculation of NMO concentrations in the sample tanks.

5.4 Sample Tank and ICV Volume. The volume of the gas sampling tanks used must be determined. Determine the tank and ICV volumes by weighing them empty and then filled with deionized distilled water; weigh to the nearest 5 g, and record the results. Alternatively, measure the volume of water used to fill them to the nearest 5 ml.

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C=TGNMO concentration of the effluent, ppm C equivalent.

C.-Calculated condensible organic (conden-
sate trap) concentration of the effluent,
ppm C equivalent.

Ccm-Measured concentration (NMO analyzer)
for the condensate trap ICV, ppm CO2.
C-Calculated noncondensible organic con-
centration (sample tank) of the effluent,
ppm C equivalent.

Ctm-Measured concentration (NMO analyzer)
for the sample tank, ppm NMO.
F=Sampling flow rate, cc/min.
L=Volume of liquid injected, ul.

M-Molecular weight of the liquid injected, g/
g-mole.

mc=TGNMO mass concentration of the efflu-
ent, mg C/dsm3.

N=Carbon number of the liquid compound in-
jected (N=12 for decane, N=6 for hexane).
P=Final pressure of the intermediate collec-
tion vessel, mm Hg absolute.
Pb-Barometric pressure, cm Hg.
Pu-Gas sample tank pressure before sam-
pling, mm Hg absolute.

P=Gas sample tank pressure after sampling,
but before pressurizing, mm Hg absolute.

P=Final gas sample tank pressure after pressurizing, mm Hg absolute.

T=Final temperature of intermediate collection vessel, K.

Tu Sample tank temperature before sampling, K.

T=Sample tank temperature at completion of sampling, K.

T=Sample tank temperature after pressurizing, K.

V=Sample tank volume, m3.

V1 =Sample train volume, cc.

V1 =Intermediate collection vessel volume,

m3.

V1 =Gas volume sampled, dsm3.
n=Number of data points.
q=Total number of analyzer injections of in-
termediate collection vessel during anal-
ysis (where k-injection number, 1 . . . q).
r=Total number of analyzer injections of
sample tank during analysis (where
j-injection number, 1. . . r).

X1 =Individual measurements.
X=Mean value.

p=Density of liquid injected, g/cc.
→ Leak check period, min.

AP-Allowable pressure change, cm Hg.

6.2 Allowable Pressure Change. For the pretest leak check, calculate the allowable pressure change:

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Concentrations by Total Combustion Analysis: A Comparison of Infrared with Flame Ionization Detectors. Paper No. 75-33.2. (Presented at the 68th Annual Meeting of the Air Pollution Control Association. Boston, Massachusetts. June 15-20, 1975.) 14 p.

2. Salo, Albert E., William L. Oaks, and Robert D. MacPhee. Measuring the Organic Carbon Content of Source Emissions for Air Pollution Control. Paper No. 74-190. (Presented at the 67th Annual Meeting of the Air Pollution Control Association. Denver, Colorado. June 9-13, 1974.) 25 p.

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