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b, Media 20 inch rainimum ciop6a of sand L .1101 inch i!iinlimum deTAIn
<br /> gravel" over under drain,
<br /> c. Effective sand size 0,3 to 0..5 mm,, Gravel grp(Jerl and olace(l
<br /> e, i2 freeboar;� above sl-:.nd
<br /> as per Sec. (802,
<br /> _kA -
<br /> f,; Sight glass, on WLil� _,� t, g.. Air r(?, e a�,,e v.-ai ve- at
<br /> high poln-c of fiii'er, y&h> fac.DAtie, w?.th Ios:�ge cont-i.-O".
<br /> for adding coagula-.Aog zhemica.!.s auhe-ad of filter,
<br /> i. Filter niDing valved for sp,)arate filter backwashing, and i-i.ltration
<br /> 2. SE-d� 7803 - DUIOMACEOUS EARTH FDETZ
<br /> a, Filter rate - two gor./sq, ft.. , maximum of two and -,ae llr--ilf (21-)
<br /> gom/sq, ft. if continuous feeding of filter aid ma',_erial nrovide.-I
<br /> b,. Pools 2,000 sq. ft, or miore and heavily used o0ols -,fiust have --ontInuOub
<br /> feeding of filter al.,,, A a minimum rate oi' 0,1 JS/bq, ft-
<br /> of
<br /> t-
<br /> of filter area over _ Lij hour neriod, Individual 1zkJ_ai-f-'(._'J,er units
<br /> not allowed on pools 2 ,000 sq, ft. or more,
<br /> c, Materials adequate to i-rithstand normal use,
<br /> d, Provision for convenient filter Cleaning,
<br /> e, Pressure-type units T)umT) roust deliver full reqiAr-_c- 011'essUll, at 60
<br /> feet head loss and sixty iercent (60%) or more of i.Ach caA)acity at
<br /> 70 feet head loss.
<br /> 3, 7304-01�HER FUTFIRS (Sufficient facWall date be
<br /> the Haalr'h Deoartment fc!- a-,.ii)r-oval -r
<br /> M SE' 77 F)CIL- "APUITY (]AL7,
<br /> Pj,aximwii -denf.li at -iecn )oint, 19" at 3-ilde walls, 1.211
<br /> `Tater recirculated at two-riour or 'loss turnover rate, S E,
<br /> Chlorine residual of at least 0.4 T)T)T,.i at all tirties Vn(�ri in UfZ-;e '
<br /> 4- Main drain for Hscln-arging pool wa-i�er orovided,
<br /> .7 7797-WATER SUPPJ:i
<br /> 11 No direct, connection of water system with pool water... (No hose filling or
<br /> direct, make-up unless protected by vacuum breaker),
<br /> 2, Convenient hose bibs equipped to V B, Is to enable hosing doom of nool area.
<br /> SEC, 7199
<br /> 3 1.4ater system under ne7"it or from source approved by tl-,e Ilealth Department,
<br /> if water supply from ,1,0.1 ,.3anitar.,� construction must �,cet Health Departmerif
<br /> aoproval,
<br /> L Guarded jet an,,.,,,le -drinking fountains provided all Pools, except where
<br /> provided in ad.-acent. "Living quarters, SEC , 7798,
<br /> H, -12
<br /> 9/61 -4-
<br />
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