10 



PILING 



As in the case of sawed lumber and timber, all piling to be treated in the same 

 cylinder charge shall be approximately of the same moisture content. In loading 

 piling for cylinder charges the following classes of material shall be treated, each 

 by itself: 



1. Green or freshl}- cut piling. 



2. Piling water stored for thirty (30) days or more. 



3. Partially air seasoned piling. 



4. Thoroughly air seasoned piling. 



Any further separation or segregation of material shall be optional with the creosoting 

 company. 



Inspection of Materi.\l Before Treatment 



Before the material is loaded on tram cars for treatment the inspector shall be 

 given full opportunity to examine it and to check the cubiture records of the plant 

 for each cylinder charge, and these records shall be open for his inspection at all 

 times. 



Thermometers and Gauges 



All the treating cylinders of the creosoting company which are used on work 

 covered by this specification shall be provided with tlie following accurate instruments: 



1. Recording Thermometers. 



2. Recording Pressure Gauges. 



3. Recording Vacuum Gauges, or combination recording pressure and vacuum 

 gauges. 



4. Indicating Mercurial Thermometers as a check against the Recording Ther- 

 mometers. 



5. The creosoting company shall also provide accurate maximum reading ther- 

 mometers for use by the inspector from time to time in checking the recording 

 and indicating thermometers. 



The inspector must check the recording and indicating thermometers at freciuent 

 inter\'als. This may be done by placing a maximum reading thermometer at some 

 point on the charge which will bring it as near as possible to the thermometer which 

 is to be checked. When the charge is removed from the treating c>-linder after treat- 

 ment the maximum reading shall be read and this reading checked against the maxi- 

 mum temperatures recorded by the cylinder thermometers. Should there be a variation 

 greater than five (5) degrees Fahr. in the readings of the instruments, necessary 

 adjustments must be made. 



CREOSOTE OIL 



The oil shall be a distillate of coal-gas or coke-oven tar. It shall comply with 

 the following requirements: 



1. It shall not contain more than i% water. 



2. It shall not contain more than 0.5% of matter insoluble in benzol. 



3. The specific gravity of the oil at 38° C. compared with water at 1.5.5° C. shall 

 be not less than 1.04. 



4. The oil shall contain from 5 to 10% tar acids. 



