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SAMPLE VERTICAL HEXAVALENT <br /> LOCATION STRATA PHENOL OIL CHROMIUM ARSENIC ZINC COPPER <br /> MOUTH SURFACE 0 46 0 0.01 0 0.09 <br /> MOUTH NEAR BOTTOM .007 3 0 0.01 0 0012 <br /> MOUTH BOTTOM MUD 0 245 0 0.05 0 QIOg <br /> AT RAFT SURFACE 0 0 0 0.01 0 0.07 <br /> AT RAFT NEAR BOTTOM .007 0Q 0 0 0 0.11 <br /> AT RAFT BOTTOM MUD .007 838 0 O.o4 0 0.05 <br /> ABOVE RAFT SURFACE 0 0 0 0.01 0 0.09 <br /> NEAR FAR BANK <br /> ABOVE RAFT NEAR BOTTOM 0 0 0 0.01 0 0.15 <br /> NEAR FAR BANK <br /> ABOVE RAFT BOTTOM MUD 0 165 0 0.01 0 0.09 <br /> NEAR FAR BANK <br /> THE BOTTOM MUD SAMPLES WERE FILTERED THROUGH FILTER PAPER, AND THE ANALYSES WERE <br /> RUN ON THE FILTRATE. THE LISTED RESULTS, THEREFORE, REPRESENT CONCENTRATIONS IN , <br /> WATER IN EQUILIBRIUM WITH THE MUD. <br /> AS CAN BE SEEN, CONCENTRATIONS OF PHENOL ARE PRACTICALLY NEGLIGIBLE, WITH HEXA- <br /> VALENT CHROMIUM AND ZINC ABSENT IN EVERY SAMPLE. CONCENTRATIONS OF ARSENIC FOR MOST <br /> OF THE SAMPLES MEET THE U. S. PUBLIC HEALTH SERVICE DRINKING WATER STANDARD FOR THE <br /> RECOMMENDED LIMIT OF 0.01 MG/L, AND NO SAMPLE EXCEEDS THE MANDATORY LIMIT OF 0.05 <br /> MG/L. <br /> CREOSOTE, INCLUDED IN THE OIL ANALYSIS, IS HEAVIER THAN WATER, HENCE THE HIGH <br /> CONCENTRATIONS OF OIL IN THE BOTTOM MUDS. As CAN BE SEEN, OIL WAS ABSENT FROM THE <br /> WATER SAMPLES NEAREST THE LOG RAFTS. THE RELATIVELY LARGE CONCENTRATIONS OF CREOSOTE <br /> IN THE BOTTOM MUDS MAY BE LARGELY A RESULT OF PAST DEPOSITS WHEN PROCESS WASTES WERE <br /> DISCHARGED TO THE SLOUGH. <br /> THE CONCENTRATION OF COPPER IN ALL SAMPLES WAS REASONABLY CONSISTENT, AND IS VERY <br /> ROUGHLY 30 TIMES HIGHER THAN OTHER DELTA WATERS. THIS IS NOT TO SAY THAT THIS IN- <br /> CREASE IS SOLELY DUE TO THE LOG RAFTS. WATER QUALITY CRITERIA INDICATES A LIMIT OF <br /> 0.02 MG/L FOR COPPER IN FRESH WATER AS BEING DESIRABLE FOR FISH AND AQUATIC LIFE, BUT <br /> IT ALSO INDICATES THAT CONCENTRATIONS RANGING FROM 0.1 MG/L TO 1 .0 MG/L ARE NOT TOXIC <br /> TO MOST FISH. THE CONCENTRATIONS OF COPPER IN MORMON SLOUGH DO NOT APPEAR TO BE <br /> DAMAGING, AS EVIDENCED BY THE PREVIOUSLY MENTIONED WARM WATER FISHERY. THERE IS NO <br /> RECORD OF A COPPER-CAUSED FISH KILL IN MORMON SLOUGH. <br /> LEGAL ASPECTS <br /> THERE APPEARS TO BE LITTLE DOUBT THAT THE BOARD HAS CONTROL OR JURISDICTION OVER <br /> THIS SITUATION. ALTHOUGH THE CREOSOTE SLICKS CAUSED BY THE LOGS ARE NOT A WASTE DIS- <br />