CONTENTS 
CONVERSION FACTORS, U.S. CUSTOMARY TO METRIC (STI) 
I INTRODUCTION. 
II MATERIALS AND METHODS 
1. General 
2. Bioassays Ustine Namera Solvds! og 
3. Bioassays Using Resuspended Natural Sediments 
iii! RESULTS: 
1. Bioassays letiac Mimerenl Soltds: 49 ¥6 
2. Bioassays Using Resuspended Natural Sediments 
IV. DISCUSSION. 
V CLASSIFICATIONS . 
VI SUMMARY AND CONCLUSIONS . 
LITERATURE CITED. 
APPENDIX - Analyses of Sediments. 
TABLES 
MES SSPECUESM ae |n sess eeee ie: fe 
Lowest fuller's earth concentration causing 100-percent 
mortality in a 24-hour exposure for five estuarine fish 
LCj9, LCsg, and LCog values determined for 24-hour exposure 
Of estuarine fushi 6! 0 Sui sth) ob ict On aes 
LCj}9, LCs5g, and LCgg values for white perch and spot, with 
increasing duration of exposure to fuller's earth 
Comparison of 24-hour LC values of fuller's earth and natural 
Patuxent River, Maryland, sediments 
FIGURES 
Twenty-four-hour concentration-mortality curves for six species 
of estuarine fish exposed to fuller's earth . 
Effect of fuller's earth on white perch, LCgg, LCsqg, and LC). 
Effect of fuller's earth on spot, LCog, LCs59, and LCj9 
Concentration mortality curves for white perch exposed to 
suspensions of fuller's earth for 12, 20, 24, and 48 hours. 
Concentrations mortality curves for spot exposed to suspensions 
of fuller's earth for 12, 18, 24, and 48 hours. 
LCj9 and LCsg values for white perch at 12-, 20-, 24-, and 48-hour 
exposures to suspensions of fuller's earth. 
LCjg and LCsg values for spot at 12-, 18-, 24-, and 48-hour 
exposures to suspensions of fuller's earth. 
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12 
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15 
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21 
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