REPORT OP THE PISH AND GAME COMMISSION. 



133 



The Southern Pacific Company has installed concrete traps 10 by 15 

 by 60 feet at San Luis Obispo, Watsonville Junction, San Jose, and San 

 Francisco, and these are in successful operation. The San Francisco 

 installation cost about $4,000, but we have been unable to ascertain 

 the cost of the others. The Western Division has built two new traps 

 in the West Oakland yards during the year past, at a cost of about 

 $1,500, which they propose to enlarge to about four times the present 

 area. The monthly pay roll of the trap tenders at present is $110.67. 



Fig. 82. Pump for waste oil recovery in oil trap of the Southern Pacific at West Oakland. 



Photograph by A. M. Fairfield. 



Numerous analyses have been made of the discharges from the various 

 chemical plants and the larger tanneries to determine whether or not 

 they contain substances injurious to fish or plankton. This work has 

 not been completed and we are not prepared, therefore, to submit a 

 statement or opinion. Beginning July 1, 1916, the work of investiga- 

 tion and prevention of water pollution will be under the supervision 

 of W. H. Shebley, Superintendent of Hatcheries, and will be handled 

 under his direction throughout the state and without reference to 

 districts. 



Respectfully submitted. 



(Signed) A. M. Fairfield, 



Deputy and Assistant. 



