United States Stove Company 7700, Manual

Page: 61 / 175

Client: QC inc. Date: March 6, 2011
Project No. Page 11 of 13
V
.
SAMPLING METHODS
V.A. PARTICULATE SAMPLING
Particulates were sampled in strict accordance with EPA Method 5G-3. This
method uses two identical sampling systems with 47 mm diameter filters. The
dryers used in the sample systems are filled with “Drierite” before each test
run.
VI. QUALITY ASSURANCE
VI.A. INSTRUMENT CALIBRATION
VI.A. (1). DRY GAS METERS
At the conclusion of each test program the dry gas meters are checked
against our standard dry gas meter. Three runs are made on each dry gas
meter used during the test program. The average calibration factors obtained
are then compared with the six-month calibration factor and, if within 5%, the
six-month factor is used to calculate standard volumes. Results of this
calibration are contained in Appendix D.
An integral part of the post test calibration procedure is a leak check of the
pressure side by plugging the system exhaust and pressurizing the system to
10” W.C. The system is judged to be leak free if it retains the pressure for at
least 10 minutes.
The standard dry gas meter is calibrated every 12 months by an appropriate
calibration laboratory. The process involves sampling the train operation for 1
cubic foot of volume. With readings made to .001 ft
3
, the resolution is .1%,
giving an accuracy higher than the ±2% required by the standard.
VI.A.(2). STACK SAMPLE ROTOMETER
The stack sample rotometer is checked by running three tests at each flow
rate used during the test program. The flow rate is checked by running the
rotometer in series with one of the dry gas meters for 10 minutes with the
rotometer at a constant setting. The dry gas meter volume measured is then
corrected to standard temperature and pressure conditions. The flow rate
determined is then used to calculate actual sampled volumes.