Correction factors used to convert counts per minute at time of initial count to d/m/1 at time of Sample no. Depth © (m) 3 Initial count Date Hour c/m Decay factor* At time c/m W-1-513 " 514 " 515 " 516 " 517 " 518 " 519 0 5 25 50 100 200 300 5/16 " " " 5/17 " " 2317 " 2310 " 0005 " 0200 3, 636 5, 902 736 2, 030 431 147, 274 1.86 1.71 2.11 1.64 1,34 1,90 1.71 6, 760 9,410 1, 550 3, 330 580 280 469 W-2-520 " §21 " 522 " 523 " 524 "525 ' 526 0 29 48 72 96 145 293 5/17 " " " " 5/24 5/17 1635 1630 1757 1820 1815 1800 1808 4,499 3, 698 2, 743 1, 449 1, 092 108 361 1.02 1.01 1,06 1.04 1.05 1,04 1.05 W-3-527 0 5/18 1600 §25 1.00 " 528 " 529 " 530 " 531 "532 " 533 30 50 75 100 150 300 " " " " " " 1520 " 1540 1600 1500 " 354 437 497 9,498 791 4,320 1,00 1,05 1.05 1.03 1,01 1,01 collection. of d/m** CGollection Volume (1) d/m/1 22, 31, 5, 11, i, 300 000 120 000 910 924 1, 550 . 390 . 500 " " " . 490 . 900 63, 700 62, 000 10, 200 22,000 3, 820 1, 890 3, 100 4,600 3, 700 2,900 ‘1,500 1, 150 112 380 15, 200 12,210 9,570 4,950 3, 800 370 1, 250 . 900 " " " " " " 30, 24, 19, 9, 7, 525 1, 730 . 500 354 460 520 9, 800 800 4,400 1,170 1, 520 1, 720 32, 300 2, 640 14, 500 *Calculated from decay curves **Includes correction factor for self-absorption, geometry and backscatter (3.3), " " " " " " 400 400 100 900 600 740 2, 900 3, 460 2, 3, 3, 64, 5, 29, 340 040 440 600 280 000 ~9 p= Appendix Table G. Radioactivity of the water (particulate matter).