Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for London County Council]
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Table 5. Particulars as to the working of the Septic Tanks.
No. | Name of town or district. | Name or number of tank. | Dates between which the tank was in use. | Length of time during which the tank was used. | Rate of flow of sewage through the tank. | Quantity of sewage passed into the tank. | Quantity of sludge left in the tank. | Percentage of moisture in the sludge left in the tank. | Percentage reduction in the amount of sludge effected by septic action. |
---|---|---|---|---|---|---|---|---|---|
Weeks. | Gallons per day. | Gallons. | Tons. | ||||||
47 | York | Closed | 21 April, 1889 to 81 Aug., 1901 | 123 | From 13,000 to 40,000 | 14,500,000 | |||
Open | 26 June, 1900, to 12 Mar., 1901 | 89 | 182,000 to 318,000 | 106,000,000 | 390 cubic yards. | 89.3 |