CALIFORNIA FISH AND GAME 129 



3. Correlate 1 and 2 with published or experimental data to esti- 

 mate the ratio between oxygen available and the oxygen demand. 



4. Conduct special studies to determine the dissolved oxygen and 

 oxygen demand, preferabl}' at times of low water and high tempera- 

 ture, in those areas where the above ratio is low^ 



5. Cooperate with industries to work out modified methods of dis- 

 posal in areas definitely polluted, resorting to legal action only when 

 absolutely necessary. 



In view of the many California industries discharging wastes of an 

 organic nature, the value of the above program in maintaining Cali- 

 fornia waters reasonably free from pollution should be obvious. It 

 will serve specifically as a basis for : 



1. Immediate action in polluted areas. 



2. Increased watchfulness in areas of potential pollution. 



3. Evaluating and dealing fairly with reported complaints of 

 pollution. 



4. Showdng the trend of pollution if the study is repeated in 

 later years. 



5. Progressive modifications in the pollution code. 



OIL POLLUTION 



In the past, the most troublesome source of pollution in California 

 waters has been from oil. Control of this type of pollution has been 

 particularly emphasized and as a result marked progress has been made 

 in the control of oil waste. However, continued watchfulness is essential 

 and inspections at wharves, shipyards, refineries, sewer outfalls, etc., 

 will be conducted at frequent intervals. 



OTHER POLLUTION WORK 



The following items will be given attention in addition to the gen- 

 eral program on organic wastes and oil pollution : 



1. Pollution from hydraulic mining, particularly in the Klamath 

 and Trinity District. 



2. Pollution from sawdust, etc., in lumber mill areas. 



3. Pollution from plants discharging toxic chemicals. 



4. Study of current literature on pollution control. 



5. Study possibility of special code to apply to fish hatchery 

 water supplies. 



6. Investigate specific complaints. 



7. Keep the importance of clean streams before the public through : 

 published articles; local newspaper accounts of control activities; 

 personal contacts; and through cooperation Avith otlier organizations 

 interested in abating, or having jurisdiction in regard to pollution. 



CONCLUSION 



It is to be hoped that conditions which have caused numerous 

 complaints, such as exist in the Eel and Klamath river districts and 

 others which may or may not have been brouglit to the attention of 

 the Division of Fish and Game, will be cleared up satisfactorily as 

 this study progresses. The task is not a simple one, and the writer 

 will appreciate receiving all data on which game Avardens, sportsmen 

 and others have definite information. 



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