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P ies Xa% C oA M / /“( DEER (HUGEL) LAKE â€" 1989 SECCHI DISCâ€"CHLOROPHYLL a SELFâ€"HELP PROGRAM The following report presents the results of your volunteer monitoring of Secchi disc visibilities and chlorophyll a concentrations to provide an indication of the recreational water quality of Deer Lake. The transparency of the water as indicated by the Secchi disc readings and the density of suspended microscopic aquatic plants, called algae, as indicated by the chlorophyll a concentrations, are averaged for the sampling season and compared with the 4 degrees of water quality. LEVEL 1 chlorophyll a concentrations 0â€"2 ug/l, excellent water quality LEVEL 2 chlorophyl1l a concentrations 2â€"5 ug/l, good water quality LEVEL 3 chlorophyll a concentrations 5â€"10 ug/l, fair water quality LEVEL 4 chlorophyll a concentrations 10+ ug/l, poor water quality A good sampling program was conducted on Deer Lake in 1989, with sampling conducted on 8 occasions. The results of the monitoring are presented below. Table 1 Secchi disc (m) and chlorophyll a (ug/L) data collected from Deer Lake, 1989 Date Station 1 Station 2 $.D. Chloro a §.D. Chloro a s9/o7/17 1.70 10.8 2.0 7.6 89/07/30 2%30 4 .0 2.3 9.7 89/08/13 2.50 11.8 2.0 12.5 s9a/os/27 1.75 3.9 1.5 4 .0 s9/09/10 1. 60 8.5 1.5 11.8 s9/o9/24 1.50 5.3 1.3 7.5 s9/10/09 1.75 1.8 1.5 3.5 89/10/23 ems seâ€"= 1.9 5.9 Average 1.87 6.59 1.% 7.81 â€" &7 f i 6eR | â€" . + 8 o ‘ 1¢8 bi:g* in C ) 2l * t