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b. Media - 40 inch mtoimum %:eptI-1 of saod and :0 -GLaimi,m depth
<br />gravel over under drain
<br />•
<br />p Effective sand size 0,3 to 0,5 mil, d. Gravel graded and olaced
<br />eft iro; ' i ' as per Sec, 7802, e, 12 inches freeboard above sand
<br />f, Sight glass on wase 0,.. v3, 1....g... Air release valve at
<br />high point of filter. L.., n. :',de;-,uate facilities 1,4 -Co. 1.olage control
<br />for adding coagula5ing chemicals ahead of filter4-
<br />Filter Dining valved for separate filter backwashicg and filtration,
<br />2. SE:. 7803 - DIATOMACEOUS EARTH FILTER
<br />a, Filter rate - two gom/sq, ft., maximum of two and c.ne half (24-)
<br />gpm/sq, ft, if continuous feeding of filter aid maerial provided for, -
<br />Pools 2000, 3q, ft, or more and heavily used tools must have continuous
<br />feeding of filter airl 'Aatc:cial at a minimum rate ot 0,1 a ds/o, ft.
<br />of filter area ove:• 2 21 1 hour period. Individual 1_.cim-filter units
<br />not allowed on poola 2000, sq0 ft, or more,
<br />Materials adequate to withstand normal use,
<br />Provision for convenient filter cleaning,
<br />Pressure-type units num must deliver full recatrec presure at 60
<br />feet head lo3s and sixty- nerceat (60%) or morE of 1.1ch '7!apatty at
<br />70 feet head loss,
<br />3, aEc, 7804-OTHER FILTERS (Sufficient factual date shah T !)e.
<br />Lhe Health Deoartment fc.r acuroval 'r C C;rOj1 1
<br />M. SEC- 77Th-JADING POOL- CAPCITY
<br />Yaximum depth at deep noint, 18'' at side walls, 1,
<br />`Jater recirculated at two-hour or loss turnover rate_ E7031,
<br />sidual of at least OJI DDM at all tims whi:n ii
<br />Main drain for discharging pool water provided,
<br />N, SUPPLY
<br />No direct connection of water system with pool wzler, cNc hose f:Liling or
<br />direct make-up unless protected by vacuum breake0,
<br />Convenient hose bibs equipped to V B,.s to enablE bosnp-. doin of pool area
<br />SE3, 7199
<br />3, Water system under permit or from source approved by te Hual .ch Deoartment,
<br />If water supply from well, sanitary construction rt,ust i.eet 1ealth Departmeqt
<br />approval,
<br />Guarded jet angle drinking fountains provided at all pools, except where
<br />provided in adjacent living quarters. SEC, 7798,
<br />E.H. -12
<br />9/61
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