N.J. Admin. Code § 7:27B-1.9

Current through Register Vol. 56, No. 19, October 7, 2024

Section 7:27B-1.9 - Preparation for sampling

(a) Each filter is assigned a control number for identification. The filter is dried in an oven at 220-230 degrees Fahrenheit, cooled in a desiccator to room temperature and then weighed on an analytical type balance to the nearest 0.1 mg. The cycle shall be repeated as many times as necessary to attain a constant weight, which is then recorded. The filter is then placed in a pyrex ** glass filter holder with the openings sealed with clean rubber stoppers.

** Trade name.

(b) The internal surfaces of the nozzles, probe, hose cyclone, impingers and all connecting glassware shall be cleaned and dried. The openings shall be sealed with clean rubber stoppers.

(c) The drying tube shall be filled with sufficient Drierite ** or silica gel to remove the moisture from the gas stream being sampled. Normally, 200-300 grams will serve the purpose. The drying tube plus the desiccant is weighed to the nearest gram, sealed immediately with clean rubber stoppers and marked for identification. The total weight is recorded.

(d) Assemble the sampling train (after selecting the proper sampling nozzle) in accordance with the drawing (Appendix 1).

(e) Place 100 ml. of distilled water in the Greenburg-Smith impinger (E[1]). Place crushed ice around the impinger(s) prior to the start of the test run and add more ice as necessary during the test runs.

(f) Check the sampling train for leaks before each run by plugging the nozzle and pulling a 15-inch mercury vacuum. A leakage rate of no more than 0.02 CFM is acceptable.

(g) Activate the heating systems of the probe, hose, cyclone and filter so that the internal gas is at the proper temperature (7:27B-1.5(b) through (d)) .

N.J. Admin. Code § 7:27B-1.9