2004-06-29_PERMIT FILE - C1981038 (4)

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Section ~o. 2.2.4 Revision No. 0 Date "lay 1, 1977 ?age 7 of 17 • When t::e fi'_ter is aligner and the faceplate is in place, the your wing nuts ~re t':ntened lust enough to prevent leaic- :ce. Excessive tightening ma• cause the filter to stick to the gasket and result in permanent damace to the gasket. The entire motor assembly (sampler) is rotated and lower=d to its normal operati:.g cosition, Figure 4.2. 4.2 Operational Checks 4.2.1 Flow-Rate Measurements with Rotame*_er Equipped Sampler - :4ake flow-rate measurements while the sampler is at no real operatir.c temperature. This requires a warmup time of at least 5 minutes before a valid measurement can be obtained. Connect the rotameter to the sampler, using the same tubi::c as was used *_o calibrate, and place or hold ir. a ver- tical position at eye level. Read the widest part of the float. IIse the calibration chart to convert the reading to • cubic .~:eters ger minute rounded to the nearest 0.03 m3/min., see Figure 2.12. Flow rates are measure~~ at the beginning and end of each SamD ling p2rlOd. addltiOn~ meaSUT°_ment5 at different tlme5 dur1.^.g t:lE Sdmpl'_ng pEr1Od 3y C' required 1n special instances, such as i.^. those cases when nonlinear leading on the filter occurs. For example if the sampler is located near a source which only operates for a s eci`ic period over the total 24-hour sampling period, fl w measurements should be taken at the end of the specific ceriod. Precauticns to be taken wh.~r. making flow-rate measure- ments include: 1. after connecti^_, the utameter to the sampler, ob- serve for at least one T~~nute _~ore `.a}:ino a r=_=ding. I_° a _radual charge in LlOW _3L2 15 ;b52rved do not ta;:e a .~ading until. ecuiiibriw-n is reac::ed. racual c:^.ar..:e •++ii.l • usually be observed •,ahe:: the r~tametar is at a substsnt.ially differer.*_ temperature _rcm the sampler e_<haust s'r and may require 2 to 3 minutes to eQ Ul'. :br3te.