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14 1:-.A <br />Atherton Island Home Owners' Association <br />Box 11 * Atherton Island <br />StocLton, California <br />At Mrs. Bud Klein <br />Gentlemen; re Atherton Island bwimming rool <br />We are contactiug all swimming pool operators, and listing items <br />needing correction or repair prior to the onset of heavy pool usage. <br />The following items will require attention and correction at the <br />above named pool; <br />Computed pool capacity and filter bed area reveal <br />that the filters and circulation system fail <br />to provide an o hour turnover of pool water, as <br />provided by the 4aws and Regulations aelatin to <br />bwiwming Pools. <br />Two surface skimmers nave been installed. current <br />standards require one skimmer for each 500 square <br />feet oi pool surrace area. Two additional skinners <br />should be installed at locations which take advantage <br />of natural skimming action of prevailing winds. <br />The main drain of the pool should be connected to <br />the recirculation system. The skimmers are to be <br />capable of circulating at least 50 percent of the <br />recirculation capacity. <br />Provide a chlorinator that meets the requirements <br />of section 7806. <br />No provision has been made to prevent back siphonage <br />from the pool through the make-up line and valves <br />into the domestic water supply. Provision must be <br />made to conform with Section 7797. <br />Provide depth marLcrs on both upper edge of pool wall <br />and on edge of pool depth at points of maximum depth, <br />minimum depth, and break point depth, and at no more <br />than 25 foot intervals. Marker numerals are to be <br />a minimum height of four inches. <br />Hose bibs in pool area are to be equippeu with <br />vacuum breoLers. <br />There appears to be a teak in the pool piping, <br />causing an excessive amount of nalre-up water to l)4. <br />aueteu daiy. This situation adci,.; to the difficulty <br />of maintaining the required chlorine residual of <br />0.4 parts per million and the required water clarity <br />anu an albalinity of from 0H 7.2 to 8.4.