Table A-5. Comparison of means of organic matter 
determinations by collection date. 
14 July | 27 Aug. 
Sample 
collection 
dates 
(1973) 
17 June [meena leer | 001 | p<0.001 | p<0.001 
28 June p<0.001 | p<0.001] p<0.001 
14 July p<0.001 N.S. 
Dias 4 seen le leat tio asi N.S. 
1ST s) 0) (A oe ee oe |e nene | Fon eC 
omparison not significant. 
1Comp t significant 
Table A-6. Inorganically bound cations in artificial 
and natural sediment. 
Element Hydrite-10 Fuller's earth Patuxent silt 
X + S.E.x 
(N = 13) 
Zn 56) O20) 
Cu AVA Ole 
Fe 2100.0 + 94.0 
Mn 2300.0 + 260.0 
Pb <10.0 
Co <4.0 
Ni <4.0 
Cd 1.0 
Cr <3.0 
Hg <0.2 
lExtraction by 0.075 N HC1-H»SO, and analysis by atomic 
absorption spectroscopy. Values are milligram kilogram. 
2analysis not made. 
38 
