<div class="chunk-title">Sec. 22-225. - Well screens.</div>
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            <p class="incr0">
               (a)
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               The well, if constructed to obtain water from an unconsolidated rock formation, shall
               be equipped with a screen that will adequately prevent the entrance of formation material
               into the well after the well has been developed and completed by the well contractor.
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               (b)
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               The well screen shall:
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               (1)
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               Be of a standard design and manufactured specifically for the purpose of well construction.
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               (2)
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               Be of steel, brass, bronze, or plastic and shall be of a strength to withstand satisfactorily
               chemical and physical forces applied to it during and after installation. Plastic
               wall screens shall:
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               a.
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               Have an accurate uniform gauge;
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               b.
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               Have a minimum wall thickness and tolerance which meets or exceeds requirements for
               Schedule 40 thermoplastic water well casing pipe for nominal sizes three inches and
               smaller;
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               c.
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               Have a minimum wall thickness and tolerance which meets or exceeds requirements for
               SDR 17 thermoplastic water well casing for nominal sizes greater than three inches;
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               d.
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               Be constructed with keystone-shaped NSF approved plastic wire or rings surrounding
               pipe or calibrated slots cut in pipe base;
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               e.
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               Be installed in wells without interference from formational material or other objects
               that may cause physical damage during emplacement; and
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               f.
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               Be approved by federal, state and municipal agencies having requirements applicable
               to well construction.
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               (3)
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               Be designed to permit the optimum development of the aquifer with minimum head loss
               consistent with the intended use of the well. The openings shall be designed to prevent
               clogging and shall be free of rough edges, irregularities or other defects that may
               accelerate or contribute to corrosion or clogging.
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               (4)
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            <p class="content2">
               Be provided with such fittings as are necessary to seal the top of the screen to the
               casing and to close the bottom; if the screen is installed inside the casing, a lead-packer
               seal or other approved device shall be used to seal the screen, or screen extension
               to the casing.
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            <p class="historynote0">
               (Ord. of 8-9-93, Â§ V(f))
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