LIST OF ILLUSTRATIONS 

 FIGURE PAGE 



76. Average Transparency of Santa Monica Bay, 

 June 1955 to August 1956, Based on 



Secchi Disc———— —— — 157 



77. Per Cent Light Transmitted at depth of 



5 feet for Winter Months (1955-56)— — - 159 



78 „ North-South Profiles of Light Transmission 

 at Orange County Sewer Outfall, 7,000 feet 

 offshore, December 19-20, 1955 — — -°-— — 160 



79. Comparison of Secchi Disc Readings with 

 Hydrophotometer Determinations of Percentage 



Light Transmission at a Depth of 5 feet 167 



80. Comparison of Secchi Disc Readings with 

 Average Light Transmission to Depth of 



Secchi Disc— — ——— — — — — ■ 168 



81. Drift Card Stations, September 8, 1955 182 



82. Drift Card Returns, September 8, 1955, Area I 184 



83. Drift Card Returns, September 8, 1955, Area I 185 



84. Drift Card Returns, September 8, 1955, Area II 187 



85. Drift Card Returns, September 8, 1955, Area II 188 



86. Drift Card Stations, September 29, 1955— 189 



87. Drift Card Recoveries Outside Santa Monica 



Bay, September 29, 1955, Areas I and II-— 191 



88. Drift Card Recoveries, September 29, 1955, 



Area II ■ — -— ~ 192 



89. Drift Card Recoveries, September 29, 1955, 



Area 111—=——=-——=——————— 193 



90. Drift Card Recoveries, December 29, 1955— — — 195 



91. Drift Card Returns, January 18, 1956-=— — -- 197 



92. Drift Card Returns, February 16, 1956- — —-—-- 199 



93. Drift Card Stations, February 22, 1956 — - —— 200 



94. Drift Card Returns, February 22, 1956, Area I— 201 



95. Drift Card Returns, February 22, 1956, Area II—-- 203 



96. Drift Card Returns, March 28, 1956 —————— 205 



97. Drift Card Returns, March 28, 1956 — =— ——- 206 



98. Drift Card Returns, March 28, 1956-=— —— 207 



99. Drift Card Returns, April 25, 1956 — =— — — - ■ 209 



100. Drift Card Returns, April 25, 1956 — — -- ■ ■ 210 



101. Drift Card Returns, May 23-24, 1956———— 213 



102. Drift Card Returns, May 23-24, 1956- ——=—= 214 



103. Drift Card Returns, June 19, 1956—— — - — 216 



104 o Drift Card Returns,, June 19, 1956 — — — - ———- 217 



105. Drift Card Returns, June 19, 1956 — ———-=— — - 218 



106. Drift Card Returns, June 29, 1956 — — — - — - 221 



107. Drift Card Returns, July 26-27, 1956- — — — -— 223 



108. Drift Card Returns, July 26-27, 1956 — — — - -— 224 



109. Drift Card Returns, August 9=10, 1956- — —=—=— 225 



110. Drift Card Returns, August 9=10, 1956==—=— — — - 226 



111. Drift Card Returns, August 9-10, 1956————- 227 

 112 „ Drift Card Returns, August 20-21, 1956 — — — -— 229 

 113. Drift Card Returns from Sludge and 



Effluent Outfall Stations, September 8, 1955=—--- 230 



