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Home My WebLink Aboutpitkin.eh.264326402011 (1999)Permit # 99100 Aspen/Pitkin Environmental Health Department Permit for an Individual Sewage Disposal System 130 S. Galena St. Aspen, Colorado 81611 Phone 970-920-5070 / FAX 970-920-5074 Parcel ID # 2643-264-02-011 Type of permit New( ) Repair( ) Addition to House( X ) Name of Owner Judith Barnard & Michael Fain Street Address 0152 Buchanan Dr Property legal description Lot R-2 Starwood Size of lot 2.5 acres Total square footage of the house 6390 Water source Starwood Water # of bedrooms in house 4 # of offices, lofts & similar sized rooms in house Caretaker unit n/a # of bedrooms in caretaker unit Designed for what # rooms (list) Designed by Total square footage of the caretaker unit # of offices, lofts & similar sized rooms in caretaker unit FOUR (4) bedrooms Church & Associates, Inc. Permit information Mailing Address 4501 Wadsworth Boulevard, Wheat Ridge, CO 80033 Perc rate 28 mpi Profile hole depth 8 ft Depth to groundwater or bedrock Septic tank capacity 2275 gallons Absorption area .1926 sq ft Comments +8 ft Septic permit approved per compliance with the engineer design and specifications dated November 19, 1999 and revised Figure 3 showing detail of the three distribution boxes and distribution of 75 % of effluent to new field and 25 % to old field. Existing "gray water" system is to be abandoned. Existing black water system is to be enlarged by the addition of one 2000 -gallon single compartment tank and three gravelless chamber beds with a total of 64 units. Any changes must be approved by this department and the design engineer prior to them being made. Minimum horizontal distances between components of the system and physical features shall conform to the Pitkin County ISDS regulations. This department does not endorse any brand of products. The engineer must do a. final inspection of the installation and submit an as -built letter to this department. This department must also be called for an inspection with a minimum of 48 hours advanced notice. Permit approved by: ' 4 s< Date: ^/1 - — `/ Plans and specifications of the pro osed individual se age disposal system have been reviewed and are considered satisfactory. Permission is hereby granted to the owner or the agent to perform the work indicated in accordance with the Pitkin County ISDS Regulation in effect at the time of issue. This permit becomes invalid 6 months from the date that the permit was issued unless system construction has commenced or an extension has been approved in writing by the Department. As -built drawings must be included with this permit before the final approval will be issued. Installer: Final inspection approval: Date: v ASPENIP1 i 1 � ENVIRONMENTAL HEALTH DEPA �1tiENT APPLICATIO►I. )R INDIVIDUAL SEWAGE DISPOSi ,wjYSTEM 130 S. Galena St., Aspen Colorado 81611 JOB NAME Phone 970-920-5070/Fax 970-920-5039 CC= CCD7 .�/ F. I W. t Name of CWNER Owner's Mailing Address �� 2 � �'►'+' N � � � ,� ' Business '-hone: /v - 2S- S c, Home Phcne: 710 2s Primary Contact Person (ail communication regarding this permit will go through this person) Name 77AI Al Ygef Company 4W/07W47^,/ /4 G Contact Mailing Address 280 e. C040V G ;?4,r4cf eb $/62/ Business Phcne : f:;k7-. //`/ Call Phone: 3? - 102 Fax 970-1-27-3374 Parcel ID r (available from assessor's office at 920-5160 or at www.aspen.com/assessor� Street address of property 0162- 81 .1v mil1/a Arra - e'o Legal Description: Lot ,Block Fiiir,g Subdivision J isWrWAIu i Size of'et: acres. Type of proposed structure: Size of bldg. envelope: Total square feet of house SD of bedrooms in house 3 T of offices, lofts & similar sized rooms in house Z Caretaker Unit: Attached ( ) Detached ( ) Total area(sq. ft.) of caretaker unit NG�lc I of bedrooms in caretaker snit : of offices lofts and similar size rooms of caretaker unit Permit is for: New Home ( ) Repair due b failure ( ) Remodel/Addittonx Emergency use ( ) Water: Private well ( ) Sprang ( ) Stream ( ) Community/Public Water System ( ) If community system: Name of system The fee for a ISDS application is $330 for a permit that takes 6 hours or less for the department to approve. If approval takes longer than o hours, a rate of S55 per hour will be charged. The maximum fee is S1000. The basic fee of 5330 is due at the time of application. The remainder, if any, will be due in two stages: first, at the time of issuance of the !SDS permit: second, before final approval of the ISOS permit. Application for an individual sewage disposal system is hereby submitted. I hereby certify that the above information, is true and accurate and that I have provided true and accurate information on locations of all existing and proposed Neils, contour intervals, buildings, property lines, ditches, slopes, waterlines, springs, suction or irrigation lines, drinking water cistems, drain tiles, irrigation ditches, lakes, water courses, streams, floodplains, dry gulches, and existing septic systems. I hereby certify that any such features not shown on attached site map are not present. Issuance of the permit does not imply the approval of any other permit required for construction pursuant to Pitkin County codes. No construction may be undertaken until all approvals and permits have been obtained. The Aspen/Pitkin Environmental Health Department, Pitkin County and employees of these agencies will be held harmless should the individual sewage disposal system fail or malfunction. The permit to construct is issued on information submitted by the applicant or his/her representatives. The owner assumes full responsibility in case of failure of the system. Signature of applicant Received by Date �4-25=99 Receipt # �ZF�' Date ; December 20, 1999 Bill Poss & Associates Attn: Richard DeCampo 605 East Main Street Aspen, Colorado 81611 Associates. Inc. ENGINEERS & GEOLOGISTS Subject: Installation Observations, Barnard/Fain Residence 0152 Buchanan Drive R-2, Starwood Village Pitkin County, Colorado Job No. 11839 Dear Mr. DeCampo, As requested, we observed the installation of the onsite wastewater system (OWS) for the subject site on December 7, 1999. The system was designed under our Job No. 11839, dated October 18, 1999. The system includes the installation of a 2000 -gallon, single -compartment, pre -cast concrete septic tank, a pump in a Biotube vault in the existing 1250 -gallon tank, a distribution box, and four chamber -beds. The total infiltrative area, including the existing field, is 1558 SF. An as -built drawing is included as Figure 1. The pump, alarm, and Biotube vault are in place and wired. Harriman Construction activated the pumping system on December 15, 1999. The components of the OWS were installed in conformance with the plans and specifications. If there are any questions or if we can be of further service, please call. Sincerely, CHURCH and t�L Edward O. EOC/trp fir:•"'••'•v%A 7Y31Z( .g ��4NAt E� 2 copies sent copy to Harriman Construction, Inc., Attn: Tim Meyer, 409 Aspen ABC, Aspen, CO 81611 QENVER 4501 Wadsworth Boulevard Wheat Ridge, CO 80033 303.463.9317 Fax: 303.463.9321 CASTLE ROCK 303.660.4358 EVERGREEN 303.816.1455 r--1 alle� kl7 3 16 1 � w,.A rll_ -- -------- 41 4;4Z/ 7 8- -�-.2- 1-7 1 7 . /,U '2- AN ASPEN/PITKIN ENVIRONMENTAL HEALTH DEPARTMEovT ISDS DESIGN REQUIREMENTS -DEPARTMENT USE ONLY Name House Size (75 gpd, 100 gpd, or 130 gpd) #of Bedrooms, Similar Rooms accessible to baths in Main Residence # of Bedrooms, similar rooms w/ access to bath in ATTACHED caretaker # of Bedrooms & Similar Rooms w/ access to baths in DETTACHED caretaker Average Daily Waste Flow 600 # bedrooms X 2 people/br X 75 State Review Required? no Perc Rate 28 (T) 3 equals # of Perc Holes Required Design Flo w (Q) = # bedrooms X 2 people/bedroom X gpd X 1.75 Q= 1820 Minimum tank capacity 2275 gallons Absorption Area (A=: Q/5 X SQRT) A = 1926 sq. ft. of absorption area required 124 infiltrator units without reduction A maximum 30% reduction is allowed for use of deep gravel or gravelless chambered system. 1348 sq.ft. with reduction 87 infiltrator units with reduction AREA NEEDED FOR STANDARD ABSORPTION TRENCHES 642 1926 Total sq ft /3 =lineal ft of trench needed 130 4 11 642 lineal ft/assumed trench length of 60ft = # of 60ft trenches needed 10 # trenches minus 1 = rows of 6ft wide undisturbed soil between trenches 33 11 times 3 = total width of of 60" long field needed for just the trenches 60 10 times 6' = total width of 60' long field needed just for undisturbed soil 93 width of trench +width of undisturbed soil = total width needed 93 by 60 ft is the area needed for a standard absorption field in a trench configuration with no reductions taken and ASSUMING AN AVERAGE PERCOLATION RATE OF 28 SLOWER PERCOLATING SOILS WOULD REQUIRE MORE AREA. SETBACK FROM WELL SETBACK FROM POND, STREAM OR IRRIGATION DITCH # of feet = 165.6 # of feet = 115.6 SETBACK FROM DRY GULCH # of feet = 90.6 Remember: 8 feet of additional distance for each 100 gallons/day of design flow over 1,000 gallons/day should be added unless an RPE can verify that it is not necessary to prevent contamination. 1/20/99 Printed on Recycled Paper ASPEN/PITKIN ENVIRONMENTAL HEALTH DEPARTMEiv F ISDS DESIGN REQUIREMENTS -DEPARTMENT USE ONLY Name — House Size (75 gpd, 100 gpd, or 130 gpd) 130 #of Bedrooms, Similar Rooms accessible to baths in Main Residence 4 # of Bedrooms, similar rooms w/ access to bath in ATTACHED caretaker # of Bedrooms & Similar Rooms w/ access to baths in DETTACHED caretaker Average Daily Waste Flow 600 # bedrooms X 2 people/br X 75 State Review Required? no Perc Rate 28 (T) 3 equals # of Perc Holes Required Design Flo w (Q) = # bedrooms X 2 people/bedroom X gpd X 1.75 Q= 1820 Minimum tank capacity 2275 gallons Absorption Area (A= Q/5 X SQRT) A = 1386 sq. ft. of absorption area required 89 infiltrator units without reduction A maximum 30% reduction is allowed for use of deep gravel or gravelless chambered system. 970 sq.ft. with reduction 63 infiltrator units with reduction AREA NEEDED FOR STANDARD ABSORPTION TRENCHES 462 1386 Total sq ft /3 =lineal ft of trench needed 8 462 lineal ft/assumed trench length of 60ft = # of 60ft trenches needed 7 # trenches minus 1 = rows of Eft wide undisturbed soil between trenches 24 8 times 3 = total width of of 60" long field needed for just the trenches 42 7 times 6' = total width of 60' long field needed just for undisturbed soil 66 width of trench +width of undisturbed soil = total width needed 66 by 60 ft is the area needed for a standard absorption field in a trench configuration with no reductions taken and ASSUMING AN AVERAGE PERCOLATION RATE OF 28 SLOWER PERCOLATING SOILS WOULD REQUIRE MORE AREA. SETBACK FROM WELL SETBACK FROM POND, STREAM OR IRRIGATION DITCH # of feet = 165.6 # of feet = 115.6 SETBACK FROM DRY GULCH # of feet = 90.6 Remember: 8 feet of additional distance for each 100 gallons/day of design flow over 1,000 gallons/day should be added unless an RPE can verify that it is not necessary to prevent contamination. 1/20/99 Printed on Recycled Paper 8 0 cQrv-i,gbnQ November 19, 1999 ENGINEERS & GEOLOGISTS Bill Poss and Associates ATTN: Les Rosenstein 605 East Main Street Aspen, Colorado 81611 Subject: Revised OWS Upgrade Design, Barnard/Fain Residence Lot R-2, Starwood Subdivision 0152 Buchanan Drive Pitkin County, Colorado Job No. 11839 Dear Mr. DeCampo, As requested, we are providing this revised Onsite Wastewater System (OWS) upgrade design for the subject site. The revision is for a relocation of the OWS based on additional percolation tests from our October 18, 1999 design report. This letter should be used as an addendum to our original design. This letter includes three revised figures - Figures 2 through 4; a percolation table - Table 1; and a pump curve. The original Figures 2 through 4 should be removed to avoid confusion. SITE CONDITIONS The property is located in a rural residential area in Pitkin County, where OWS are required. The proposed drain field area has a 20% slope to the southwest, and a cover of native grass with clusters of scrub oak. The main residence has an existing gray water and black water OWS as indicated on Figure 1. The existing "black water" system consists of a 1250 -gallon septic tank, a dosing siphon in a 500 -gallon tank, and an equivalent 597 square foot (SF) "deep gravel' trench OWS. The three -feet of "deep gravel' allows a 30% increase of the 459 SF of the field. The existing OWS was permitted in 1993. There is also a "gray water" OWS for washing machine facilities, which will need to be abandoned, as the entire sewage treatment will be directed through one system. The residence is served water by the local water district. PROPOSED CONSTRUCTION The existing residence has greater than 6000 square feet (SF) and will be remodeled to have a total of 4 bedrooms. We have sized the OWS based on 4 bedrooms and 1040 Gallons Per Day (GPD) using Aspen/ Pitkin Environmental Health Department (APEHD) loading of 130 gallons per day per person. The sewage loading with a peaking factor of 1.75 is 1820 GPD. This loading includes a dishwasher and garbage grinder. We are proposing to abandon the existing gray water OWS, and upgrade the existing "black water" OWS to accommodate the entire residence. SUBSURFACE CONDITIONS We performed supplementary percolation tests at the locations indicated on Figure 2. Percolation tests indicate percolation rates of 15 to 40 minutes per inch (MPI), in holes P-7 through P-9. The average percolation rate is 28 MPI. A profile test pit was excavated at the location indicated on Figure 1. Subsurface conditions exposed consist of 1 foot of sandy clay topsoil root zone underlain to 8 feet by very stiff sandy clay, which was reddish brown to brown. No free water or evidence of a seasonal high water table was observed in the test pit. DENVER 4501 Wadsworth Boulevard Wheat Ridge, CO 80033 CASTLE ROCK 303.660.4358 303.463.9317 Fax: 303.463.9321 EVERGREEN 303.816.1455 n RECOMMENDATIONS Revised OWS Upgrade Design Job No. 11839 Page 2 We recommend the installation of a septic tank and three chamber -type drain field beds installed at the locations presented on Figure 2 to expand the existing OWS. The OWS design is based on an average sewage load of 1820 GPD and a percolation rate of 28 MPI. The existing OWS has effective area totaling 540 fC. This drain field will be used in conjunction with the proposed fields. We recommend the installation of one 2000 -gallon single -compartment, concrete septic tank to be placed in front (up -gradient) of the exist- ing 1250 -gallon septic tank and dosing tank. A duel effluent pumping system should be installed in the dosing tank to replace the dosing siphon. Two `new' distribution boxes are to be placed as indicated on Figure 2 to distribute effluent to the existing distribution box and the proposed drain fields. Three gravelless beds should be installed, the two beds of `A' having 2 rows of 11 chambers and the `B' bed having 2 rows of 10 chambers. The required area for a drain field for the proposed residence would be 1926 SF. The equivalent area of the existing black water drain field is 540 SF, which was subtracted from the 1926, resulting in a required area of 1386 SF. A 30% reduction of the 1386 SF area was taken for use of chambers, result- ing in a required area of 970 SF. It is proposed to add 970 SF of drain field in three chamber beds. DRAIN FIELD PREPARATION Vehicular movement over the drain field area during construction should be kept at a minimum to avoid compaction of the receiving soils. Dump trucks and rubber -tire backhoes are to be kept out of the field excavation. We recommend the bottom of the bed be scarified with a pick, shovel, or backhoe bucket teeth prior to the addition of dispersal gravel. LIMITATIONS An OWS design should be installed by a contractor who is experienced in its installation. Our layout, design and recommendations are based on data submitted. If subsurface conditions different from those described in this report are encountered, we should be notified to evaluate the effect on the proposed OWS. If the health department makes modifications to this design, we should be contacted to evaluate the impact on the performance of the OWS. The county and our firm must be contacted upon completion of the OWS. All construction is to be in accordance with the ISDS regulations. Pipe type and size, burial requirements, septic tank construction, and other specifications, which are not depicted in our report, are to conform to the requirements of the ISDS regulations. The installer of the system is to have demonstrated knowledge of the APEHD ISDS regulations and requirements. CHURCH & Associate O0 REG' 1. o . • 9� o Roger J. Shafer, P.E. RJS/trp AtE� 3 copies sent Fax copy to: 970.920.5070, Attn: Nancy Fed Ex copy to: Tim Meyer 280 East Cody Lane Basalt, CO 81621 Duplex Effluent Pumping System Slope Ground Away from Riser Inlet Tee Patents # 4,439,323 & 5,492,635 Foreign Patents Pending /--PVC Riser with Grommets (bond to tank adopter with recommended adhesive) Fiberglass Gosketed Lid with Stainless Steel Bolts Discharge Assembly PVC Splice Box with Cord Grips Flexible Hoses (2) Conduit to Effluent Discharge Control Panel — Conduit Seal Tank Adapter (cost or bolted)---\\ Level Control Liquid Level v I 4.VT-- Float Assembly Check Valve (optional) Vault Inlet Ports Flow Inducer (2) CSI Effluent Pump Drain Port Filter Cartridge Bictube® Pump Vault v� • 0-0 Orenco Systems® Incorporated 814 AIRWAY AVENUE SUiHERUN, OREGON 97479-9012 TELEPHONE: (541) 459-4449 FACSIMILE- (541) ACSIMILE(541) 459-2884 EDW -TD -6 JOB NO. 11839 FIGURE 4 • CHURCH & Associates, Inc. 11/19/99 Pump System Design Criteria EM Design Flow Rate 30.0 Distributing Valve Model (# of Zones) none T_MMMWMM�MMMMMMMMMMM 02—an MMMMMWUMMMK=MMMMMMMM mmm mm b��-Rmm mml\Nmm = M�MKN�OMMMMMMMM� 1� MMS INMM\ mmmmm mmmmm �►v0►V�IM Lift to Distribution Point MMMKM MMM W M 0MMM1 MMMME mL -MLU- MMMME NM-Mk1 MMMMM 20.0 feet Discharge Assembly Size .-...-m� 1.25 Transport Line Size 2.00 inches Pipe Class?Schedule 40 Transport Length 30 feet Flow Meter none 'Add-on' Head Loss 0 Friction Head Losses: Head Loss in Transport Pipe 0.5 feet Head Loss through Discharge Assembly 4.5 feet Head Loss through Distributing Valve 0.0 feet Head Loss through Flow Meter 0.0 feet Size Pump for: DESIGN FLOW RATE 30.0 TOTAL DYNAMIC HEAD 25.0 .. No. 11839 200 w 150 0 100 r 50 P30 15 - 6 stage �Mmmikqlwmmmmm MMMMM�vMMM�M GO Hertz 115/230 Volt A IM MMMMM®MMONM�� EM MOMMM MMW 'Available in 11 5V or 230V �MMMM MMMMI WMmmm�i T_MMMWMM�MMMMMMMMMMM 02—an MMMMMWUMMMK=MMMMMMMM mmm mm b��-Rmm mml\Nmm = M�MKN�OMMMMMMMM� 1� MMS INMM\ mmmmm mmmmm �►v0►V�IM NOWNi. = MWMNMEWWWLW�MM MMMMM M001qqM MMMM' MMMMM MMMMM ft`'MMM MMMMM MMMmm mok,�mm MMMMMMMMMMMM1b\.MM1kMELWMMMM0 MMMMM MMMMM MM0ft MMMMM MMMMMMMMMM.UMkN=MMMMN' MMMKM MMM W M 0MMM1 MMMME mL -MLU- MMMME NM-Mk1 MMMMM M�MMMMMMMMM�MMMMWUMMMMMI IN MMMM--..-M� ..-.--..■. mm�MMM.. N�MMMM-.-..-. .-...-m� 0. 0 10 20 30 40 50 Net Discharge, GPM 0 00 E PROFILE: TABLE 1 - PERCOLATION TEST RESULTS R-2, STARWOOD VILLAGE DATE OF TEST: 11-18-99 Pitkin County, Colorado IF -4 Aoc-; finn 0 -1' Topsoil, Root Zone 1'- 8' Clay, Sandy, Very Stiff, Moist, Red/Brown NO GROUND WATER WAS ENCOUNTERED WITHIN THE EXCAVATION 7 AVG. INTERVAL DEPTH TIME DEPTH DEPTH CHANGE, PERC. HOLE HOLE NUMBER OF HOLE, INTERVAL, START, END, (INCHES) RATE PERC. (INCHES) (MINUTES) (INCHES) (INCHES) MPI (MPI) RATE, 17 IMPI1 7 21 30 12.00 16.50 4.50 7 1.75 17 12.75 30 16.50 19.00 2.50 12 30 30 16.00 17.00 1 1.00 30 11.50 13.50 2.00 15 14.50 15.25 0.75 30 13.50 15.50 2.00 15 15 8 24 30 11.25 13.00 1.75 17 2.50 12 30 13.00 14.75 1.75 17 12.75 13.75 30 14.75 16.00 1.25 24 30 30 16.00 17.00 1 1.00 30 30 9 26 30 10.2.5 12.75 2.50 12 30 12.75 13.75 1.00 30 30 13.75 14.50 0.75 40 30 14.50 15.25 0.75 40 40 NUMBER OF HOLES: 3 AVG PERCOLATION RATE (MPI): 28 Remarks: Holes presoaked 8 hours prior to data collection Job No. 11839 3.08 ACRES 152 BUCHANAH DRIVE STARWOOD SUBDIVISION PITKIN COUNTY, COLORADO BED A: 2 CHAMBERS X 10 CHAMBERS IN LENGTH BED B: 2 CHAMBERS X 6 CHAMBERS IN LENGTH BED C: 2 CHAMBERS X 5 CHAMBERS IN LENGTH JOB NO. 11839 t DISTRIBU- BOX- BUCHANAN DRIVE - - r EXISTING GRAY WATER SYSTEM EXISTING TANK WITH DOSING SIPHON EXISTING 1250 -GALLON SEPTIC TANK WITH EFFLUENT PUMPING SYSTEM ADD ONE 2000 -GALLON SINGLE COMPARTMENT PRE -CAST CONCRETE SEPTIC TANK EXISTING<,f RESIDENCE n § NEW GRAY WATE JC_" PVC OUTLET PIPE AUTO COURT `N%"% RETAINING WALL-.. _ E RETAINING WALL 100 SCALE 1 " = 40' I P-4 TO BE ABANDO D {jJ - 1 C _ _... J F -U _ __ �- g ...- ...... _... _..... — — L_ — — 90��- — — 961 SF OF INFILTRATIVE AREA IN 4 GRAVELLESS BEDS OWS AS -BUILT DRAWING WITH INFILTRATORS/CHAMBERS. FIGURE 1 3.08 ACRES 152 BUCHANAN DRIVE STARWOOD SUBDIVISION PITKIN COUNTY, COLORADO BED A: 2 CHAMBERS X II CHAMBERS IN LENGTH BED B: 2 CHAMBERS X 10 CHAMBERS IN LENGTH DISTRIBUTI BOX BUCHANAN DRIVE r 'NEW' DISTRIBUTION BOX _ t Mm EXISTING GRAY WATER SYSTEM TO BE ABANDO D ..... .. ... "I','"', .... ... .. . UTILIZE EXISTING TANK WITH ADDED J 1 i�. I� EFFLUENT PUMPIMG SYSTEM EXISTING 1250 -GALLON SEPTIC TANK ADD ONE 2000 -GALLON SINGLE COMPARTMENT PRE -CAST CONCRETE SEPTIC TANK I RETAINING WALL I ^ AUTO COURT i EXISTING. kk' RESIDENCE r�- I NEW GRAY WATE ",4" PVC OUTLET PIPE FIELDS TO FOLLOW GARAGE TOPOGRAPHIC CONTOUR 4" PVC LINE;_' r 110 I k `+c 3 w r 'y TO NEW' SEPTIC TANK L-` NOTE: RETAINING WALL CLEANOUT TO BE 100 PLACED OUTSIDE _ ROFILE PIT I -- ......................_..... .. RESIDENCE IF NOT _ PRESENTLY EXISTING P" P -o D DIS BUTTON BOX - - J - - 90��. - - 10 MIN ADD 992 SF OF INFILTRATIVE AREA IN 3 GRAVELLESS !- LOCATION OF PROPOSED OWS BEDS WITH INFILTRATORS/CHAMBERS. 1 " = 40' REVISED FIGURE 2 JOB NO. 11839 TYPICAL PLAN VIEW - N.T.S. GRAVELLESS CHAMBER 3' BY 6.25' BED A 6' 3' 4" SCHEDULE 35 PERFORATED 4" SCHEDULE 35 PVC I PVC PIPE SUSPENDED ACCORDING TO OBSERVATION/VENT PIPE MANUFACTURER SPECIFICATIONS (PIPE INSTALLED LEVEL) TYPICAL CROSS-SECTION - N.T.S. 4" SCHEDULE 35 PVC BSERVATION/VENT PIPE WITH CAP r -BACKFILL 4' MAX 0 • • EXTENT OF EXCAVATIO CALCULATIONS AND SPECIFICATIONS DESIGN CRITERIA STRUCTURE - 4 BEDROOMS, >6000 SF LOADING - 130 GAL/DAY/PERSON TOTAL LOADING - 1040 GPD PERCOLATION TEST - 28 MPI AREA - (1.75 X Q XRT)/5 = 1926 SF ADJUSTED EXISTING AREA = 540 SF ADDITIONAL AREA NEEDED = 1386 SF REDUCTION FOR USE OF CHAMBERS - 30% TOTAL AREA - 970 SF . 11839 1.5 -MIN. sm THREE TOTAL BEDS 4" SCHEDULE 35 PERFORATED PVC PIPE HUNG ACCORDING TO MANUFACTURER SPECIFICATIONS GRO�NO W GRAVELLESS CHAMBER 3' BY 6.25' BED SPECIFICATIONS NUMBER OF BEDS - 3 BED A-2 CHAMBERS WIDE X 11 CHAMBERS IN LENGTH BED B-2 CHAMBERS WIDE X 10 CHAMBERS IN LENGTH TOTAL NUMBER OF CHAMBERS - 64 CHAMBERS TOTAL AREA - 992 SF DRAIN FIELD DETAILS EFFLUENT INLET _ (1/8" PER FOOT DROP) r— ISTRIBUTION BOX 6' IN / EFFLUENT LINE TO ADDITIONAL 'A' BED LEVEL MANIFOLD TYPICAL DISTRIBUTION BOX - N.T.S. 3' APPROX.- PLAN PPROXIPLAN VIEW Z I_4 OUTLET ROX. CONCRETE DISTRIBUTION BOX 4" SCHEDULE 35 PVC PIPE F -INLET -OUTLET INLET OUTLET VIEW VIEW * MINIMUM OF SEVEN OUTLETS NEEDED TREATMENT UNIT SPECIFICATIONS TOTAL CAPACITY - 1.75 X Q X (30 HOURS/24 HOURS) = 2275 GALLONS RECOMMENDATION - ADD 2000 GALLON SINGLE COMPARTMENT PRE -CAST CONCRETE SEPTIC TANK. TO BE FOLLOWED BY EXISTING 1250 GALLON SEPTIC TANK AND DOSING TANK. ADD EFFLUENT FILTER TO OUTLET OF EXISTING 1250 GALLON SEPTIC TANK AND ADD PUMP TO REPLACE DOSING SIPHON. REVISED FIGURE 31 TO 8" APPROX. 1' APPROX. -OUTLET INLET OUTLET VIEW VIEW * MINIMUM OF SEVEN OUTLETS NEEDED TREATMENT UNIT SPECIFICATIONS TOTAL CAPACITY - 1.75 X Q X (30 HOURS/24 HOURS) = 2275 GALLONS RECOMMENDATION - ADD 2000 GALLON SINGLE COMPARTMENT PRE -CAST CONCRETE SEPTIC TANK. TO BE FOLLOWED BY EXISTING 1250 GALLON SEPTIC TANK AND DOSING TANK. ADD EFFLUENT FILTER TO OUTLET OF EXISTING 1250 GALLON SEPTIC TANK AND ADD PUMP TO REPLACE DOSING SIPHON. REVISED FIGURE 31 i rw- ;r„1 associates WS EAS' VA. S*AEET ASPEN COIOAADOB'r, r rE 1391 925- M ME 1 *f M: DO16N vevm oPf' PRWN6 PAGKABE f -01s :P9iF71T:8ET : : : FQ!T9:PRO6Rfrb : : %?ZEf'4�i: PAvbpihfS : :-:.}zan: CoN4tWWioa A7f ei4 :Ahlbl$ : e- v •J», 9•:9 •:'fR Dom' J sARNARvMAIi 152» STA WDDO SAIDIVI610N M7KW cow f, cO ORAM KEYPLAN