~2AIR SAMPLING DATA- FRED AIR SAHPLE Fred 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 DATE AT END DAYS FRO END uuc/ng AT uuc/,ae AT END OF COLLECTION (PPG DATE) OF COLLECTION TO Ist COUNT Ist COUNT OF COLLECTION 7-1 7-2 7-3 7-4 Ta5 7-6 7-7 7-8 7-9 710 7-11 7-12 7-13 7-14 7-15 7-16 7-17 7-18 21,6 20.9 19.9 18,5 17.9 18,0 17,8 17,0 16,0 14,8 13.9 13,1 30 29 28 27 26 25 11,0 6.5 11,0 39.6 19,9 12,5 22,1 32,4 26,1 919 12,8 10,0 76,2 6,65 6.47 5,6 8,70 29.5 200 250 410 1500 330 390 730 490 240 65 62 220 4800 420 ‘400 150 140 1400 23 22 13,1 5.80 270 280 7-23 7-24 33 32 3.58 4.18 7-26 7-27 7-28 7-29 7-30 7-31 30 29 28 27 26 25 7-19 7-20 7-21 7-22 7-25 , 24 21 31 14 6,44 - 3.83 8.65 17.6 12,0 10.2 14.3 680 240 240 260 Instrument failure 72 550 1000 260 150 150