§ 16.15.190. Water, wastewater, and solid waste.  


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  • A.

    Potable water shall be provided from a source approved by the department. The water supply shall be adequate for the purposes of the facility and shall meet the standards of 18 AAC 80.

    B.

    Samples of pool water shall be collected at least monthly while the pool is in use, at a point near the outlet of the pool, and at any other points designated by the department. The department may increase the frequency of pool water sampling if necessary to assure that the pool water meets the standards of this section.

    C.

    Routine samples collected under B. of this section may not:

    1.

    Contain more than 200 bacteria per milliliter, as determined by the standard (heterographic) agar plate count at 35 degrees C; or

    2.

    Show positive test (confirmed test) for coliform organisms in any of the five 10 milliliter portions of a sample, or when the membrane filter test is used, show positive test (confirmed test) for more than zero coliforms organisms per 100 milliliter.

    D.

    Samples of pool water shall be collected and examined in accordance with the American Public Health Association's Standard Methods for the Examination of Water and Wastewater, 16th Edition, 1985.

    E.

    If a sample of pool water tests positive for pseudomonas or other pathogens, the pool shall be closed until sampling shows that the water is free of the pathogen.

    F.

    Samples of pool water shall be examined by a laboratory approved by the department.

    G.

    If chlorine is used as a disinfectant, the level of free chlorine shall provide a molecular hypochlorous yield of not less than 0.3 mg/l. The yield shall be determined either mathematically or by using the graph in Table E of this subsection.

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    TABLE E

    FREE CHLORINE LEVELS 16.15.190.png

    To determine correct free chlorine dosage at a measured pH:

    1.

    Find the measured pH on the horizontal axis of the graph;

    2.

    Follow the corresponding vertical line up to where it crosses the curved 0.3 mg/l line; and

    3.

    From this point, draw a horizontal line to the axis and determine the minimum free chlorine dosage required.

    To determine if a sample at a specific pH and free chlorine level meets the standard:

    1.

    Read horizontally from the free chlorine level determined by testing;

    2.

    Read vertically from the tested pH;

    3.

    If the point where these lines cross is below the line of the curve, the sample does not meet the minimum standard and the free chlorine dosage shall be increased or the pH lowered; and

    4.

    If the point where these lines cross is on or above the line of the curve, the sample meets the standard.

    H.

    In addition to the requirements of G. of this section, the following requirements apply to the level of free chlorine:

    1.

    Chloramines may not exceed one-half of the total chlorine level;

    2.

    Chlorinated isocyanurates and cyanuric acid shall not be used;

    3.

    Only solution feed systems shall be used, but erosion feed systems and manual feed systems shall not be used;

    4.

    Gas chlorinators shall feed no more than three pounds of chlorine per 10,000 gallons of pool volume in a 24-hour period; and

    5.

    Mechanical means shall be used to dispense pool chemicals and disinfectants that are added routinely; chemicals shall only be applied directly into the pool by hand during an emergency to super-chlorinate or otherwise adjust pool water quality; hand application shall only occur when the pool is closed to bathers.

    I.

    The pH of pool water shall be kept between 7.0 and 8.0 when bathers are in the water.

    J.

    Alkalinity shall be kept between 50 and 200 mg/l and shall be measured at least once a week.

    K.

    Pool water shall not cause corrosion or scaling of the pool. Total hardness shall be kept between 100 and 1,000 mg per liter. Calcium hardness shall be at least 70 percent of the total hardness. The saturation index shall be within plus or minus 0.5.

    L.

    The wastewater system shall comply with 18 AAC 72. The sanitary sewer serving the pool and auxiliary facilities shall discharge to a public sewer system whenever possible.

    M.

    Solid waste shall be conveyed, stored, and disposed of in a manner which minimizes the development of odor, prevents waste from attracting and harboring vermin, and otherwise complies with 18 AAC 60. Any incinerator used by the facility shall comply with 18 AAC 50.

(AO No. 99-11, § 6, 2-9-99)

Editor's note

The document described in 16.15.145 may be obtained from the American Public Health Association, 10 15 Fifteenth Street, N. W., Washington, D.C. 20005. The document may be reviewed at the Anchorage Health Department.