The Bridgeport evening farmer., 1911-10-24
E. H. DILLON & co.

Herring system If 1t were to build the new sewers now proposed, the two
 small trunk sewers for the East and West ends. He. was anxious to know if the two small trunk sewers in ques- tion. if built as suggested under the Herring plan, would be so constructed that eventually the city must adopt the pumping stations and interceptors said such was not the case. .
 Alderman Stewart asked the engi- neer to tell of the system used in oth- CT cities. He said that Boston used combined system, with interceptors, discharging into salt water at three points. but in the outskirts of the city a separate system is now under way which they rebuilt to make a separate system.
 New York has a combined system, said the engineer. The conditions are very peculiar there, said he, for the city is almost surrounded by water so that the separate system did not appear advantageous. But now with the cutting up of the city by the Subway system, the double system of sewage is being advocated. Philadel- phia used the combined system, sim- liar to that in use here under the Scofeld system, but it is now install ing a double system in it's outskirts.
 
 til recently, he said, and then it built a double system. Washington has combined system, and New Orleans 8 double system.
 Alderman Stewart asked about the oyster situation in Baltimore. Engf- neer Herring told him that the Balti- more people. as a matter of sentiment, did not want it known that they were discharging crude sewage into the Chesapeake Bay, and that the puri- fication of the sewage was ordered to protect the reputation of the seafood which was widely shipped. But MT. Herring added that it would have been cheaper for the city to buy up all the oyster beds than to install the process they are using.
 Alderman Mahoney was insistent that some relief be given to the South End Every rainfall leaves many streets and cellars flooded. he said, and he asked MT. Herring if he could suggest something that would help out conditions. MT. Herring said he believed his plan provided for the conditions in the South end. The Sec- ond district representative was insis- tent however and practically demand ed that something be done at once. MT. Herring said he would be glad to work for the city and straighten out conditions there if the city would like to have him.
 Alderman Paddock then brought up the question of cost, and MT. Herring went into the explanation already de- tailed, of the comparative cheap cost of the Herring system because to bury the sanitary drain does not require such a large excavation as to bury a combined drain, which would neces- sarily be of much greater propor- tions Mr. Herring also pointed out that storm water may be discharged into streams or shallow water w1th- out fear of pollution and for that req son these sewers are not necessarily carried far away while if they are polluted under the combined system with sanitary sewage. they must be into deep water. Thirdly, he said. the double system is cheaper if is attempted, because the matter to be treated is much less if the rain water is not mixed with the sanitary sewage.
 Alderman Paddock asked MT. Herring if in his opinion it would be absolute ly necessary for the city to install a J pumping system. Or if the city would be in his Judgment considered unheai- thy under its present system.
 'I am not a physician" replied the engineer. .I must ask to be excus- | ed from answering that question"
 MT. Herring then went on to say that odorless sewers are possible under all The drains must have smooth interior surfaces so that there | must be a flow of from and one half to feet per second.
 Alderman O'Neil asked if there was danger of the state. making the city | purify it's sewage before emptying it into the sound MT. Herring said he | knew that the State of Pennsylvana had compelled Philadelphia to purify l it's sewage.
 Alderman Paddock asked if he knew of any state that has forbidden it's cities to empty sewage into salt wa .er The engineer said he couldn't see much difference, but added that fresh water acts upon sewage more quick V than salt water Alderman Pad | lock then recalled the attempt that was talked of in the last legislature of which he was a member. to force he shore towns to purify their sew age.
 MT. Herring said that statistics com piled at the Chicago drainage canal showed that where three cubic feet ,f fresh water are efficient in ham, Hing sewage for a given quantity of people, there must be from four to i've cubic feet of salt water.
 Alderman DeForest asked how long ,efOre the city must install it's pump l ng stations.
 Assuming you are not forbidden O empty your sewage you needn't ,ump," replied MT. Herring.
 ''The determination of the pumping question, then, will rest upon whether we can stand the sewage or lot?" asked Alderman DeForest.
 Exactly" replied MT. Herring.
 Mir Herring spoke of Reading, Penn. 1e said that he knew of no fault find ng there except his own. The sys- em was installed but not wholly sat sfactory, when he was called in and lis firm designed a plan for the sedi- nentation and oxidation of, the sew Lge which the state board of health approved The typhoid in Philadel- ,hia is now about one-fifth what it vas. for the Philadelphia people get heir drinking water from the Schuyl- ill river into which the Reading sew ge flows.
 Alderman Primrose asked MT. Her ng's ideas on the project of with olding the sewage for outgoing tide, dr. Herring said if the flow is ample here would be no question of the arrying off of the sewage but the rouble would be in the tanks in : mich the sewage is held. If it takes I wo hours to discharge the tanks, then f he average period of retaining the ewage for the tide would be 10 hours Attorney Phelan asked MT. Herring the proposition of interceptors and 1 l jumping stations and other features | l f the system except the trunk sewers {