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_3_ pipes to handle and resulted in a backup into basements throughout the • community. In contesting this theory, t!ie residents cited the explosive nature of the surge of sewage, possibility chat the storm sewers might be running into the sewage lines, as wall as t:le suspicion that the mud, which • constituted a bulk of the seepage into their homes, might have originated in a construction site in the Industrial Park, as possible grounds for dispute. Those residents from 29th Avenue a.uestioned the reoccurrence of backup of sewage into their basements again on May 12 when there was no rain. Mr. Dulgar told them that incident; was caused by limbs of trees in the sewage pipes which resulted in a backup of the flow of sewage into the line which serves 29th Avenue, There was also some discussion of a similar occurence on June 6, 197+. Councilman Stauffer left the meeting temporarily at 8:35 P.M. The Street Department and Fire Department were commended by some of the resi- dents for their quick response to calls from the residents during the emergency. Only one voiced criticism of response made by City officials. Mr. Swanson demanded proof that the water from the drain tiles was the cause of the mishap before the City should undertake the expensive task of enforcing restrictions against diverting ground water into the sanitary system. Mr. Anderson agreed that the problem might be caused by such diversion and suggested that all drain tile lines should be "cemented up'.. In response to the remarkes from the residents, Mr. Dulgar noted the observation made by the Supt. of Public Works in his memo of April 29th that at 2:00 A.M. April 28th, when the sanitary system should have been receiving a minimum of • flow from household use, the flow in the lines had not subsided at all, which Mr. Hamer and Mr. Dulgar felt provided proof that the excess flow was caused by rain runoff through the drain tiles into the sanitary sewer lines. The City Engineer explained the positioning of the sewer and sanitary lines down 29th Avenue N.F. and Highway 8 and said there is no place where the two systems are connected. The Mayor illustrated the manner in which the lift station at 37th Avenue N.F. operates and said the station was turned off during the crisis to prevent any further pumping of sewage towards 34th Avenue N.E. The Manager told of plans for closed circuit televising of some sewer lines and rodding of sanitary sewer lines which should detect a break in the sewer lines which could have caused infiltration into the sewage lines. Mr. Comstock and Councilman Sundland confirmed that such a project would soon have to be undertaken in any event to meet the requirements of the Metro Waste Commission under the regulations imposed by the Federal government whereby all communities will be required to ascertain their inflow and infiltration into the sewage lines to eliminate any material except sewage being transported to the Pigs Eye Sewage Center for treatment. The inability of both the Roseville and Minneapolis sewage lines to handle the flow from St. Anthony during the heavy rainstorm on the 27th was also presented as an addition to the problem for St. Anthony. 40 Councilman Stauffer returned to the meeting at 9:25 P.M.