MARCH 18, 1992 - Laserfiche WebLink

Home Browse Search

~)nlv Those $1alemenls Below Thai Have Been Marked Are To Be Considered For This Soils Invoslloall011,. ., ~he Olhor Slalemenls Are To Be Disreaarded Because Tbev Do Nol ADDle/. (.. ) This silo may be considered lot a subsurface Irench absorplion tleld syslom. Tho Ironch bollom mlJ$l bo JlLJJ~3sJ 2.'LJ~LI~ abovo any layer wilh a loading tale el loss Ihan 0.25 gpd/sq. II. or groaler Ihan 1.2 gpd/sq, fl. Il Iho design daily Ilow' is less Ihan 450 gallons, or il lhe lronch Eollom Is al Ioas130 inches above any layer willr a loading tale BI less Iban 0.25 gpd/sq, t1., a gravily Ilow Irickle Iced syslem may bo conslrucled. I~ lite design daily Ilow is equal Io or grealer Iban ,450 gallons and il lbo Irencb bollom is wilbin 30 inches BI a layer wilb a loading tale BI 0.25 gpd/sq, fl., Ihen a melhod BI dosing, such as pump assisled dislribullon or allernating fields musl bo used because o! lbo proximily of lbo Irencb bollom Io Ihis layer. Any absorplion lield designed wilb a lolal Irench lenglb BI more Ihan 500 lineal leel musl ulilizo pump assislod dislribulion In order Io enhance dislribulion BI Ihe ellluenl. II lite Irench bollom is wilbin 24 inches BI a layer wilb a loading rale BI 1.2 gpd/sq. I1., Ihen pressure dislribulion musl be used. Doplb Io layer wilh a loading tale BI less Ihan 0.25 gpd/sq, fl.: Doplh Io layer wilb a loading tale o! more Ihan 1.2 gpd/sq. Il.: Deplb Io I. ayor wilb a loading tale BI 1.2 gpd/sq. I1.: (:/~L) 'JlJhe seasonal hiah waler ab e can be owererf o a deplh of al least 34 inches below Ihe surfaco, hen Ihls si o may be considered for a subsurface Irench absorplion field syslom. The Irench bollom musl bo ~[ Ioasl 24 incho~ above Ihe seasonal high waler lable aller inslallalion BI lhe drainage syslem. The Ironcb bollom musl also bo ~3LLo~15L?~I_jQC,~ above any layer wilh a loading tale BI less Iban 0.25 gpd/sq. 11. or groaler Iban 1.2 gpdlsq, fl. II Ihe design daily flow' is less Ihan 450 gallons, or il lbo trench bollom Is al Ioas130 inches above any layer wilb a loading rale leSs Ihan 0.25 gpd/sq. I1., Ilion a gravily flow Irickle Iced syslom may bo conslrucled. II lbo design daily Ilow is equal Io or grealor Ihan 450 gallons, and il Iho Ironch bollom is wilhin 30 inches el a layer wilh a loading tale BI 0.25 gpdlsq. 11., Iben a melbod BI dosing, such as pump assisled dislribulion or allornaling fields musl be used because BI Ibe proximily BI lbo Ironcb bollom Io Ibis layer. Any absorplion lield designed wilb a Iolal Irench lenglh of more Iban 500 lineal 1ool musl bo dosed using pump assisled dislribulion in order Io enhance dislribulion BI Ihe ellluenl. II lbo Ironcb bollom is wilbin 24 inches of a layer wilb a loading rale BI 1.2 gpd/sq. I1., Ilten pressure dislribulion musl be used. Doplh Io layer wilh a loading tale o! less Iban 0.25 gpcl/sq. I1.: Doplb Io layer wllh a loading tale BI more Iban 1.2 gpd/sq. I1.: Deplb Io layer wilb a loading tale of 1.2 gpd/sq. I1.: ( ) The poor filleting qualilles BI Ibeso sand lexluros ;,'vilbln lite soil profile can allow Improperly trealod ellluonl Io baler and conlaminale lhe ground waler unless a pressure dislribulion syslem is used. (/~ ) Surfaco diversions arb required Io remove Ihe excess sudaco waler lrom Ihe proposed soplic area. ( ) Subsurface drainage, perlmelor drainage, and surface diversions are required I~) ~emovo Iho excess surlace and subsudaco waler Item lire proposed seplic area. ( ) This silo may be considered Ior an .elovaled sand rebuild because Ibe deplb Io lbo seasonal blgl'J waler lablo and limiling layer Is grealer Iban 20 inches, and Ibe slope is less Ihan 6 percent. ( ) II lite seasonal high waler can be lowered lo a deplb BI more Ihan 20 inches, Ibis silo may bo considered lot an elevaled sand mound. (... ) This silo Is ~ Ior any subsurface syslem because BI lbo presence of a Ilmlllng layer wllhla 34 Inches of Iho soil surface. (..) This silo Is unsulled for any on-silo sewage disposal syslem because ( )[Of Flooding/Pending]; ( )[Of Posillon In The Landscape (Flood Plain or Some Olhor Topograpbic Posillon)]; ( )[OI The Presence O! A Limiling Layer Wilhin 20 Inches Of Tho Soil Sudace]; ( )lei Slopes Grealer Than 15 Percenl]. IA comblnalion of a limiling layer wilhin 34 Inches and a slope grealer titan 6 percenl]. An allernale silo should be selecled. Any syslem recommendalions Included In Ihls repod are based on lhe slope, posilion In landscape, deplh 1o any Iimiling layers and soil prolile descriplion at each silo. Consideralions such as lhe size o! area available, Iol conliguralions, nocessap/selback and soparalion dislanceso feasibilily el adilicial drainage,