Document jBZNEDwzK5RGVZRZqEqvgxayZ

COMMISSIONER OF HEALTH Stanley H. Osborn, M.D., C.P.H. (Copy) BUREAU OF SANITABI ENGINEERING Warren, J. Scott, S.B. Director STATE OF CONNECTICUT DEPARTMENT OF HEALTH Ilartford Mr. Peter H. Mortensen 91 Nott Street Wethersfield, Conn. Dear Mr. Mortensen; Through the cooperation of yourself and the Standard Oil Company, we ran three tests involving the' steaming of two trucks and subsequent filling with drinking water. We are enclosing for the information of your committee tabulations of the results. , The first test was made on one of your trucks on February 13. This truck had been carrying kerosene prior to the steaming. After steaming, the truck was drained, filled with water, disinfected and emptied. It was then refilled a second time with cold water, /ifter this, it was drained again and filled a third time with cold water. After the first filling, there was a decided chlorine taste as would be expected. After the second filling, there was a faint kerosene taste.. After the third filling, there was no taste and even after storage for some time in the lab oratory, there was no taste, and the odor disappeared rapidly after standing in an open container. Our sanitary engineer who made the test: reported that the water was readily drinkable from both the second and third fil3.ings. The bacteriological analyses showed no dangerous types of organisms. The other two tests were made on a truck carrying leaded gasoline on February IS. Two separate compartments in the truck were used. On one test, tile compartment was steamed, filled with water and disinfected and drained. After this, it was flushed out and refilled. At that time the water m s allowed to stand in the com- . partment for four hours, after which the tank was again drained and partially refilled a third time. As noted in the table which is headed "A", the water after the first filling and disinfection had a chlorinous taste as would be expected. After the second filling, the water had a faint oily taste although the water was drinkable. This oily taste and odor seemed to disappear on standing in the laboratory. After a four hour contact in the truck, the water had a distinct gasoline taste and odor although it was still drinkable. The water as noted after a short contact in the truck in connection with the third filling had no taste and odor. ' N5305 The other compartment was filled without chlorination. This test is indicated by the tabulation headed "B " . After steaming, the truck was filled and then , drained. It was then refilled. The water after the first filling had a faint oil taste. After the second filling, it had only a veiy faint oily taste. It was then drained and refilled a third time. After the third filling, it had no taste or odor after short standing in the truck. However, after standing for four hours in the truck following this third filling, the water picked up a gasoline taste and odor. This taste and odor disappeared upon further standing in an open container. The water was drinkable'at all times. The test indicated that the chlorine tended to accentuate the taste and. odor but we feel that chlorination is necessary. Hr. Peter R. Mortensen -- March 4, 1942 ti s were ictory, showing the absence of any dangerous types of organisms. We found that practically no lead was picked up by the water standing in the truck which had previously contained leaded gasoline where the water stayed in the truck a relatively short time. However, after thc water had stood in the truck for four hours it would pick up some lead. Where the water in the tank was not subjected to chlorination, this lead amounted to 0.16 parts per million. In the truck where the water in the tank was chlorinated , the lead in the water after four hours standing in the truck was 0.3 parts per million. This difference nay not have been due to the effect of the chlorine. It might have been due to variation in the condition of the two compartments. The amounts of lead indicated are not high enough to constitute a health hazard under the conditions of use that would prevail. We are, however, interested to know if the water were allowed to stand for still longer periods in trucks which had formerly carried leaded gasoline, If there would be a decided increase in the amount of lead absorbed. I have discussed this with Mr. H. 0. Hobbs and Mr. William Hannan of the Standard Oil Company and they have agreed to cooperate with us on a further test next Wednesday. In connection with this test, we will follow out the ame pro cedure as outlined on test "A" at their plant except that after the first filling and disinfection, we will refill the truck with city water and then allow.the water to stand in the truck overnight. This will give us additional data on any desirable limits for contact between the water and the trucks. liter we make this test, we would like then to drain the truck and fill it once' more, possibly allowing it to stand another four hours. This-would give us information as to whether the amount of lead dissolved will decrease as the reftilings continue. . I am sending copies of this letter and the tabulations to Doctor Burgdorf, health officer of Hartford, end to Mr. Caleb M. Saville of the Metropolitan District of Hartford, xrho was represented by Mr. Centner at the meeting we held. Very truly yours, (Signed) Warren J. Scott Director Bureau of Sanitary Engineering W J S VAH Enes.3 cc: Dr. Burgdorf Mr. Saville S; : Approx. Time for Each Operation 150 min. 5 min. 65 min. 20 min. 25 min. 5 min. TABULATION OF PROCEDURE FOLLOWED IN TEST CLEANING OF FUEL OIL TRUCK ' OWNED BY PETER H. MOETBNSEN. TJETHERSFIELD COMPARTMENT CAPACITY. 1550 GALLONS. .COMPARTMENT PREVIOUSLY CARRIED KERO PERSONS PRESENT: PRB. R. R McDONALD. AN) I. A. F A R N M M OF IITFD. CITY HEALTH ': ' AND MR, PETER. MORTENSEN . Operation Ta s~bg A Samples following Each Operation Odor Color Res. Chlor. Steamed with high pressure Jenny 185 C. and 10Q#/sq.in. Condensate drained Compartment filled from street hydrant and disin fected with about 13 oz. of I-ITH or 4-0- p.p.m. Allowed to stand 1 hour Decided Chlorinous disinfectant Compartment emptied tS Compartment filled with cold water and emptied. Faint kerosene Kerosene Compartment filled with cold, water None None Sample for Laboratory None Faint Hydro carbon 10 O.T.Red .O.T. 0.1 p.p.m O.T. 0.0 p.p.m. 0.0 p.p.m. F.0.A..Almquist February 13, 194-2- Bacteriologica organisms of t ' "A" TABULATION OF PROCEDURE FOLLOWFIb-XN TEST CLEANING QF COMPARTMENT MO.6 OF GASOLI TRUCK OF STANDARD-OIL COMPANY OF NEW YORK IN HARTFORD COMPARTMENT CAPACITY 250 GALLONS. TRUCK iiAD CARRIED LEADED GASOLINE 220,000 MILE PERSONS PRESENT: PR. A.L. BURGDORF, HEALTH OFFICER: IIP. TO. HANNAN,STANDARD OIL CO. OF APPR0X, TIME fe OPERATION 'r 4 t: . |< 20 m m . OPERATION Steamed with low pressure SAMPLES TASTE , F0I,LOWING OPERATION ODOR COLOR LEAD RES. CHLOR. iE, 5 min. 55 min. 10 min. Flushed with hose and hot water * Filled with cold virater 3 oz, Decided Faint HTH added and allowed to stand disinfec chlorine 30 min. tant Emptied tank O.T. Red 5 min. Flushed with cold water 55 min. A hrs. 1' >i' |f-.15 min. Refilled with cold Faint Faint water and allowed to oily oily stand 30 min. Sample to lab. None Very faint hydrocarbon Water allowed to stand A hrs. Distinct Distinct in tank. gasoline gasoline Sample to lab. Distinct Distinct di aagreeable Hydrocarbon Tank partly refilled. None None 0 30 j\ \ - j*K.Sherman fU f*; February IS, 194-2 jKs/DAT Flush water . 0.35. . <.01 0.3 No tas cuickl Taste for 2A Bacter showed isms. ( "B" TABULATION Of PROCEDURE FOLLOWED IN TEST CLEANING OF COMPARTMENT NO. 5 OF GASOL TRUCK OF STANDARD OIL COMPANY OB NEW YORK IN HARTFORD COMPARTMENT CAPACITY 250 GALLONS. TRUCK HAD CARRIED LEADED- GASOLINE 220,000 MIL PERSONS PRESENT: DR il,L,BURGDORF,IRAI.TK OFFICER; MR.WI,!, FJvNNAN,STANDARD OIL CO- OF N vAPPROX TIME . 'OF OPERATION OPERATION SAMPLES ! FOLLOWING OPERATION TASTE ODOR COLOR LEAD ItFS.CHLO $'20 min. . if 5 m n 55 min. V4-0 min. 5.0 min. Steamed with low pressure Flushed with hose and hot water. Filled with cold water and allowed Faint oily None to stand 3 0 min. - Emptied and refilled with cold water. Tank emptied, flushed, refilled and allowed to stand 10 min. Sample to lab. Very faint oily None None None . None Faint Hydrocarbon o c.oi ;U hrs iy 'S-V, fi ly ,v.'*}; L.K.Sherman lks/dat Tater allowed to stand 4 hrs. in Distinct tank. 'gasoline Sample to lab.' Feb. 18, 1942 Distinct gasoline Distinct hydrocarbon 15 0 . 1 6