SEWAGE DISPOSAL 



CESSPOOL 



43 



In many places, the creamery will be required to purify its 

 sewage before allowing it to enter the town sewer or before dis- 

 charging it into public streams. For that purpose a cesspool 

 or a septic tank is used. 



The cesspool may be utilized if the subsoil is of a loose, sandy, 

 or gravelly nature. The cesspool consists of a htle dug in such 



Vonf Pt'pe 



FIG. 8. Catch Basin. 1 



soil of a size sufficient to hold several days' sewage. It should 

 be walled up with stones not too closely fitted together and the 

 top covered tight with planks and earth. The sewage water 

 will seep away between the stones into the surrounding loose 

 subsoil and thence gradually disappear. As this subsoil becomes 

 clogged with suspended particles from the sewage, it gradually 

 decreases in efficiency as a filter. Then a second cesspool is 

 often dug, the sewage being conducted from one to the other 

 through a tile placed some distance from the bottom of each pit. 

 The cesspool is hardly to be recommended, as it has too many 

 possibilities for danger through contamination of well water. 

 But if used, it should be located at least 400 or 500 feet from 

 the well. 



1 Bulletin 46, Minn. Dairy and Food Dep. 



