Percent Monthly and Cumulative Percent Contamination Recovery Rate Calculated per USP <1116> on Microbial Counts of Active Air Sampling in Classified Area Grade B
| Month | # of Samples Tested per Month | Cumulative # of tested samples | # of Contaminated Samples per month | Cumulative # of Contaminated Samples | Monthly % Recovery Rate | Cumulative % Recovery Rate |
|---|---|---|---|---|---|---|
| Jan | 5 | 5 | 4 | 4 | 80.0 | 80.0 |
| Feb | 4 | 9 | 1 | 5 | 25.0 | 55.6 |
| Mar | 2 | 11 | 0 | 5 | 0.0 | 45.5 |
| Apr | 5 | 16 | 2 | 7 | 40.0 | 43.8 |
| May | 4 | 20 | 3 | 10 | 75.0 | 50.0 |
| Jun | 5 | 25 | 2 | 12 | 40.0 | 48.0 |
| Jul | 5 | 30 | 1 | 13 | 20.0 | 43.3 |
| Aug | 4 | 34 | 0 | 13 | 0.0 | 38.2 |
| Sep | 4 | 38 | 1 | 14 | 25.0 | 36.8 |
| Oct | 5 | 43 | 2 | 16 | 40.0 | 37.2 |
| Nov | 6 | 49 | 1 | 17 | 16.7 | 34.7 |
| Dec | 5 | 54 | 0 | 17 | 0.0 | 31.5 |