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142 Mr. Glynn asked if the company expected to get enough water to supply water to the hospital for an indefinite period. Mr. Crocker said that the contract with the govern- ment called for a supply of three hundred gallons of water a minute, and they can pump eleven hundred gallons a minute. They are pumping 700,000 gallons of water per dayfor the N. E. Chemical Co. in Woburn now, and the water level has not been changed at all. Mr. Kimball asked what the speed of the pump was, and Mr. Crocker said that it had 1750 rev- olutions per minute. There is very little noise, though, and one could not tell from the outside whether or not the pump was in operation. Mr. Glynn asked if the wells were already driven, and Crocker said that the wells were driven and the motors and pumps were ordered, but not in. He said that the delay had been a very serious question with them. The men were thrown out of work. Mr. Glynn asked if the motor was connected through to the pump with a shaft, and he replied in the affirmative. The Chairman asked if the pump could be moved back, as the Zoning Law calls for a twenty foot set back. Crocker said that the only way to remedy the situation would be to run an underground shaft. Mechani- cally that would not be very good, and it would mean taking the matter up with Washington. The wells are located where they are because of the strata underneath. Mr. Glynn said that this would no doubt take a considerable amount of water from the underground water. Mr. Crocker said that 85% of the fresh water was underground, and the amount that these wells will take is really very samll. He said that his company was perfectly sure that it could supply all the water for the Metropolitan district without going forty miles away from Boston. Mr. Glynn asked if the question of locating the well twenty or twenty-five feet away from where it is now would make any difference, and Mr. Crocker said that it would. In Bedford they found a great deal of clay and sand. It is a question of the strata, and where you can get the best water. They analyzed the water before they took the contract, and the government also analyzed it and found it satisfactory. Mr. Glynn asked if he meant to state that it was just in this one spot that this particular strata was. Mr. Crocker said that he did not know just how many spots they had tested, but there were a great many. They did not find the proper strata on the Linehan land, hear where the pumps are to be located. He said that it was possible, however, that if they went down ten feet more they might find just what they wanted. Mr. Glynn asked the size of the apperture inside the cement. Mr. Crocker said that the casing tapered from 52" down to 48"; that is all excavated, then a screen 20" across goes in; outside the screen broken gravel is filled in. The well itself goes down thirty feet, and the construction of the well is quite complicated. 1