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Figure V-1. Cumulative frequency distribution diagrams for each segment and season (Spring and Summer) showing 
the assessment curve (solid blue line) against the default reference curve (dashed black line). 
■ 1 ug/l 
10 ug/l 
§20+ ug/l 
Figure V-2. Example map graphics. Larger map shows the average chlorophyll a concentration (pg/L) in the tidal 
James River for summer 2006. Dots represent the locations of fixed stations. Inset shows the same data reduced to 
the assessment binary (grey=pass, black=fail). 
chapter v 
Chlorophyll a Criteria Assessment Procedures 
