Determination of Particulate Matter Emissions from the Wool Fiberglass Insulation Manufacturing Industry
This method is for the determination of particulate matter (PM) from wool fiberglass insulation manufacterers. Particulate matter is defined as any material that condenses at or above the filtration temperature in the method. This method is similar to Method 5 and differs in the use of sodium hydroxide (NaOH) impingers instead of water impingers and the rinsing procedures of the glassware following sample collection.
Samples are collected isokinetically from a source on a pre-tared (to a constant weight) glass fiber filter containing no organic binders maintained at a temperature of 120 ± 14°C (248 ± 25°F). A Method 5 train consisting of a heated probe, heated filter, and series of impingers. The first two impingers are filled with 100mL of 0.1N NaOH, the third impinger is left empty, and the fourth impinger is filled with 200-300g of silica gel.
The filters used for sample collection must be dessicated for at least 24 hours at a contant temperature (20 +/- 5.6°C) and pressure to a constant weight (less than or equal to a 0.5mg weight change to the nearest 0.1mg) and pre-tared prior to use. The filter must have a 99.95% efficiency on 0.3 micron dioctyl phthalate smoke particles.
Once the sample has been collected, the filter is removed and placed in a petri dish. If it is necessary to fold the filter, make sure the PM is on the inside of the fold. This is container 1. Container 2 differs from Method 5 and consists of a water rinse of the probe, probe assembly and front half of the filter holder. There is no brushing of PM into this water rinse. Container 3 consists of an acetone rinse of the probe, probe assembly and front half of the filter holder plus the brushing of the PM from the glassware into the rinse. Container 4 consists of the silica gel which is weighed to determine the moisture content of the stack gas. Container 5 consists of the contents of the impingers which are measured and then combined. Three 0.1N NaOH rinses of the impingers and connecting glassware are also added to Container 5.
At the laboratory, the filter is dessicated to a constant weight. The amount of PM on the filter is equal to the weight change from the pre-sampling weight and the final constant weight of the filter post-sampling. The volume of Container 2 and 3 are measured, evaporated to dryness at ambient temperature and pressue, and dessicated for 24 hours to a constant weight. The contents of Container 5 are measured for total organic carbon (TOC) using a nondispersive infrared analyzer. First total carbon is determined then total inorganic carbon. TOC is equal to the difference between the total carbon and total inorganic carbon. The sum filtered PM and condensed PM is equal to the total PM for the sample.
(EPA 40CFR Part 60 Appendix A)