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<br />Table 6. U.S. Environmetal Protection Agency Rapid Bioassessment Protocol III metric values. MHBI <br />Modified Hilsenhoff Biotic Index, SC = scraper, CF = collecter-filterer, EPT = Insect orders, <br />Ephemeroptera, Plecoptera, Trichoptera. Abundance data is number/m2 for quantitative samples and <br />number per sample for qualitative samples. NC = Not calculated. * = unable to calculate. <br /> <br /> Riffle sample <br /> EPT: % contribution SH:abundance <br /> Total SC:CF Chironomidae dominant EPT (% shredders) <br />station Date richness MHSI ratio ratio taxon richness ratio <br />31-MILE-1 06/10/94 18 4.83 0.984 0.356 38.300 6 2.3 <br />31-MILE-1 06/10/94 18 4.83 0.984 0.356 38.300 6 2.3 <br />31-MILE-1 06/10/94 18 4.83 0.984 0.356 38.300 6 2.3 <br />CURRANT-1 06/10/94 16 4.37 0.125 0.585 50.300 7 1.3 <br />CURRANT-1 06/10/94 16 4.37 0.125 0.585 50.300 7 1.3 <br />CURRANT-1 06/10/94 16 4.37 0.125 0.585 50.300 7 1.3 <br /> ------ ------ ------ ------ ------ <br />Mean 17 4.60 0.555 0.471 44.300 7 2.0 <br />