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V Los Angeles, April 13, 1951 7334- MEMORANDUM To: R. L* A. On Tuesday, April 10th, received ’phone call from Water Service Foreman John Snorf after lunch stating that Mr. Doyle of the Water Company had just informed him that the Health.Department’s report on water sample taken from the lower side of the settling basin near Charleston Reservoir had indicated that the water at this source was not potable. I asked Mr. Snorf to investigate conditions at the settling basin and wells to see whether he could determine what caused the unfavorable report and to call me back later in the day. After talking to Mr. Adamson it was decided that I would call the Health Department at Las Vegas and discuss the matter with them but before doing so contacted Mr. W. H. Johnson, who was in the Los Angeles office at the time, and he requested that I give him an opportunity to talk to them the next morning - April 11th, before discussing it with the Health Department. No contact was therefore made with the Health Department on April 10th. Later in the afternoon on April 10th Foreman John Snorf called me and stated that he could find no evidence of any condition which would indicate possibility that contamination had entered through any of the openings at the settling basin or at any point at the Wells. I told him that I would call him the first thing in the mornihg and tell him what had been decided to do about the situation. On Wednesday morning, April 11th, I called Mr. Snorf about 9:00 A. M. and requested him to procure a good clean 50-gallon drum and make a concentrated chlorine solution, using perchloron which he could secure from the local store and send bill to me, and feed the chlorine solution into the upper portion of the settling basin continuously until further advised and at the same time taking con­tinuous series of tests, with the little tester which he has, at the lower end of the settling basin and to keep the concentration of chlorine flowing into the reservoir at a range from 2/lOths to A/lOths parts per million. He was requested to keep a man on the job 24-hours a day to see that the concentration of chlorine in the water did not exceed the arrangement stated above. In accordance with my request, Mr. Snorf made the necessary arrangements and introduction of chlorine into the settling basin was started before noon on Wednesday March 11th and men were assigned to observe the concentration of chlorine in the water continuously 24-hours per day.