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An Alternative to EPA Method 9 AFRL - page 4 / 30

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29 Oct 02

Capt Calidonna

Current Method

“Ringleman” Number

Calibration run

Observers must estimate the opacity

25 Black; 25 White

Within +/-7.5% for an individual reading

Absolutely correct 26% of the time

Samples range from 0 to 100% at 5% increments

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