No preview available
HomeMy WebLinkAboutPlansRegrade above leach field to direct all. surface flow away from field. Proposed .._. Infiltration Area INSPECTION PORT (TYP) Well with 100' Radius 48 QUICK4 INFILTRATOR UNITS SCR SEWER PPE • Water Line New force main sewer, 1 Purecor or HDPE SDR17 continuos, 3 ft bury depth, encase in 4" sewer pipe 1 O'each side of water line crossing from well. Provide positive slope from pump to distribution box Approx Property Boundary New Concrete pump pit with lift pump Existing Septic Tank 1 Existing Leach Field, unknown extents, disconnect from septic tank, leave for future exploration ti QRAF131C SCALE DI FEET 1 Site Pian SCALE,: 1 " 100' Double or Bidirectional Clean—Out w/Removable Cap as per local code. 8"tyP•_ 4" SDR 35 Sewer Pipe (min. Slope = 2Z) 6" Cl. 6 Bedding Graded Level Compact Base to 95% Modified Proctor Density Note; Tank is existing, volume to be verified that 1250 gallons exists, this detail is provided in the event new tank is required or secondary tank is used as pump vault 4.00 Finish Grade Conc. Cover (Typ) 20"0 Riser Sections Inlet Invert shall be at least 3" Higher than the Outlet Invert (Typ) 4" SDR 35 Sewer Pipe_ To Distribution Box (min. Slope = 2%) These drawings have been prepared for the then identified on the design sheet titleblock. Unless these drawings bear a signed engineers seal, they may be used only at owners sole risk. Electric by others, recommend high level alarm float with 7 - alarm on box or in house r Stub old 4" line to old leach field into pi, cap 14" min. Zabel Outlet Filtr or approved equ'l Concrete vault, optional manhole or secondary septic tank can be used, install same as septic tank details Plumbing details for connection type and service aspect to be determined between owner and contractor ypical Concrete --Detail SCALE: N.T.S. D High level alarm 3' Min .5' Min Force main, continuous piece of HOPE or Pure cor, 1" minimum 48" Concrete Manhole Cone Supported on Concrete Block Concrete Block as necessary 4' SDR 35 Sewer Pipe to Trenches 6' Concrete Distribution Box -may■��1.=f 24" Approx 8 Hole Conc. Distribution Box w/ Baffle. Bed on 6" Cl. 6 Base Course Compact Base to 95% Modified Proctor. Standard 48" MH Section w/Cover supported on concrete blocks. 5 1.f. 4" SDR 35 Pipe, or SCH 40, adapt to force main From Pump Tank cap Install Tracer Pipe. Wire with Install Polylok Equalizer at Inlet of Each Feeder Pipe. 4" SDR 35 Sewer Pipe Quick4 Infiltrator Units (typ) Stub Pipe Into Infiltrator Unit and secure with screws Quick4 End Cap Unit (typ) 6' min. (tyP) To Last Infiltrator Trench Distribution Box Plumbing Detail SCALE: 1" = 2' Quick4 Infiltrator Trenches Shall be 1 Unit Wide x 12 Units Long in 4 Trenches for a Total of 48 Units Stub 4" SDR 35 Sewer Pipe into Infiltrator Unit and secure with screws. /\ /..//ice` ,%. .a This ISDS design is proposed to serve a single family residence with up to 4 bedrooms. Wastewater demands are based on a residence with up to 4 bedrooms serving up to 1.5 occupants per bedroom for a maximum occupancy of 6. Assuming an average daily residential sewage demand of 70 gpd per resident. The calculated Average Daily Waste Flows are as follows: Residence Average Daily Waste Flow: 6 occupants x 70 gpd/occupant = 420 gpd Total Design Average Daily Waste Flow = 1.50 x Total Average Daily Waste Flow: 1.5 x 420 gpd = 630 gpd Minimum recommended concrete septic tank size Residence = 1250 gallons Percolation testing was performed by Colorado River Engineering Inc. as follows: Percolation Rate 1: 51 min/inch Percolation Rate 2: 33 min/inch Percolation Rate 3: 29 min/inch Use Worst case (conservative planning) = 51 min/inch The required absorption area (A) for a normal gravel type leach area is calculated using the following formula: A = Design flow x -"Ave. Percolation Rate 5 Therefore, A = 630 x V38 5 A = 831 sf Garfield County allows a maximum reduction of 50% of the required leaching area for a graveless type design in a Trench configuration. This is a Trench configuration, Therefore the required Area = 831 sf x 0.5 = 415 sf Required number of Infiltrator Units = 4151 15.5 = 27 units Required number of Infiltrator Quick4 Units = 27 x 1.5625 = 41.8 units The Trench configuration shall be 4 Trenches, each being 12 units long for a total of 48 units (12% factor of safety). Minimum Horizontal Setbacks: Setback from Wells: 100 ft Setback from Creek: 50 ft The above designed ISDS shall be installed satisfying all minimum setbacks and design stanuards as aescribed by Garfield County ISDS regulations and according to all manufacturers specifications and recommendations. The contractor shall notify the engineer of construction time schedule and will be required to have engineer inspect prior to burying underground improvements. All structures are served by private water well. NOTE: The Septic Tank shall be inspected on an annual basis to monitor the solids loading within the tank. Finished Grace existing Grade Backfill with Exccvated Soils (See Infiltrator irstallation instructions) 1. • w - i r,1 I[ l [l ih, Nom iiiiti'1 i 'iLirA1i! e 1l r •, \/\\�/\t%. /�, /7,` ` /� %/ ///>/// /// /// ��/{�://i`/j'/l //>//://>\Y /. i • The Outlet Filter should be removed and cleaned each time the tank is pumped. The installation of plumbing shall also be subject to the corresponding building codes. Construct at 2' depth below existing ground Scarify Excavated Leaching Surface (Keep Heavy Equipment Out of Excavated Area). Entire Leaching Bed Surface to be Level Within 0., feet. 10 gpm min Pumps, float switch on when within 6" of inlet pipe, low level float within 1—foot of floor This Drawing Not Valid Unless Latest Revision Initials Are Hdwritten Typical Infiltrator® Side Section Detail Original Drawing Preparation De' rriptio Ry rate Approved Date By Date Drawn CM 5-29-09 Checked Approved Client Appd, SCALE: N.T.S. 4" PVC Inspection Port Install in Irrigation Valve Box. 4" Notch to be Cut Infiltrator and secured with screws (Locations as per Site Plan) COLORAD 41/F ENGINEERING 11CORPORATrn PO Box 1301 Rifle, CO 81650 Tel 970-625-4933 Fax 970-625-4564 CLIENT Blair Residence 407 Groff Lane SILT, CO PROJECT Blair Residence ISDS SHEET TITLE ISDS FILE M:1CREjobliiles\797- Blair\ISDS.dwg SHEET NO. 1 Revision