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HomeMy WebLinkAboutpitkin.eh.264522100004 (1991)�►. %�( �5 ora/ -moo-aQt�c: i ASPEN#PITKIN Q� ENVIRONMENTAL HEALTH DEPARTMENT �f INDIVIDUAL SEWAGE DISPOSAL PERMIT NO. PE OF PERMIT: Initial Construction ( )Emergency Use ( )Repair Work,(Pievious Permit 1 r installation ( )Use Permit as a result of Sale ( )Others ISSUED TO: ,) ( )Alteration of an existing system, (Previous Permit 1 ) DATE OF ISSUE ..� -2- / Owner �I (-J-mc.6� Zl / Home Phone ,&)-".J/ 8% Business Phone Mailing Address 96)( a922 / /J &AI. Agent 1� ���/i'jOn/`3/� Phone Mailing Address Sewage Disposal System Work to be performed by �% Qi This permit valid only for premises location by tho fell wing legal descriptions- -e �2- 7— �,eUf^0AG/1�� LOT SIZE _, ()'/I e eC--� , WINTER SUPPLY _ AVERAGE PERCOLATION RnTF.LQO /'J/ This Individual Sewage Disposal Permit is granted with regard to the following uset'���CC! Nsrsi,er oft Dodreoms Lofts_ Garbage Disposals_ / Dishwashers Clothes Washers CALCULATED AVERAGE DAILY WASTE LOAD GALLONS. THE NATURE. OF THE SYSTEM INCLUDED UNDER THIS PERMIT: ype of Tank or Treatment Units ` /vu ,l Tank Capacity _Callon Minimum cthod of Final Disposals C,;y.ltie leo &�P071 'AAfS101� 71L)!1f Absorptiop Area 9LY0 Square Feet Minimum cscrip_ion (including brand name, if any) of other equipment or appurtnancess "AJ e-OA16 )then Conditions or SpecificationssALL MAI -S'/ AfV 'SP�LJ���/+/r�N� / �l��G"N �./ 6)S' 0� - .1 SEEM //i/Si`fI t ffl�%Q/ll ��1cral�� � i � � �3' S y STAGES REQUIRING INSPECTION BY THE HEALTH DEPARTMENT: I� ( ))Before Excavation ( )Upon completion of excavation and prior to placement of gravel Before distribution aystem ootf absorsorption field kP rior to backfill of any component ( )Other, Specifyt Plans and specifications of the proposed sewage disposal system have been reviewed and are considered satisfactory. Permission is hereby granted to the owner or his anent to perform the work, indicated above in accordance with the Pitkin County Indivi ual Sewa;e Disposal Ro,vilations in effect on the date of issue. In addition to general provisions set forth on the reverse her -20i' this Permit is suthject to the following additional terms and c ditionst l Aspen/Pitkin Environmental Health Officer tTPROVED FOR ISSUE BY �' (title) Yhc ahnve individual acwa.lo disposal aystem installed by i", ix�en in::{,ectcd for use by a representative (.f the Ass -en vii .tn Envlronrk•nta 5C.F-E17-(icp•srtmcnt. The uwnor asaunoa ars ren)onsibility in case of failure or inadequacy of thio scw.,ga dispooa� aystem Co ple�o as -built drawing attached. DATE 01 F INAL INSPECTIOy3j �'�/ �r� � J�S n/Pi*in Environmental BY: Health C�i�et TITLE 130 South Galena treat Aspen Colo_raf o 81611 303/920-5070 4� ASPEN#PITKIN ^"\ ENVIRONMENTAL HEALTH DEPARTMENT APPLICATION FOR AN INDIVIDUAL SEWAGE DISPOSAL•PERMIT Name of OWNER Victor Gerdin PHONE 920-3781 /-1 -2-3- �)-o $ Address of OWNER P.O. Box 8979 Aspen, CO 81612 Name of APPLICANT Sal -.1e PHONE 920-3781 PERMIT TO BE: ( )Picked Up - K )Mailed to: TYPE OF PERMIT: (,)New Installation ( )Repair towner ( )Applicant ( )Emergency Use ( )Alteration NOT due to failure LOCATION OF PROPOSED SYSTEM: Legal Description 5 0+ in the NW4, NE -4 Sec. 22, T9S, R86W of the 6th P.M. (Shield O'Mesa) Lot NA Block _ NA Filing NA Subdivision S h i e 1 d 0 'M e s asize of Lot 5.0 acres TYPE OF STRUCTURE: (X)Single Family Dwelling ( )Other: Do you plan any further Additions to the residence? ( )YES ( )NO No. of bedrooms 3 No. of Lofts No. of Garbage Disposals 1 No. of Automatic Dishwashers I No, of Automatic Clothes Washers 1 WATER SUPPLY: (X) Private Well, Depth to be fi P t a r m i rp@ )Public, Name of System ( )Spring ( )Stream or Creek TYPES OF INDIVIDUAL SEWAC£ DISPOSAL SYSTEM PROPOSED: (X)Septic Tank/Absorption Field ( )Aeration Plant/Absorption Field ( )Composting Toilet ( )Incineration Toilet ( )Mound (')Recycling, potable use ( )Recycling, other use ( )Vault Privy ( )Other: The initial site inspection must be arranged with the Aspen/Pitkin Environmental Health Department (925-2020. 8:30-9:30 a.m.) before a permit can be issued. The individual sewage disposal permit must be issued before a building permit can be obtained. FINAL INSPECTION APPROVAL MUST BE GIVEN BY THE ASPEN/PITKIN ENVIRONMENTAL HEALTH DEPARTMENT PRIOR TO BACKFILLING ANY PORTION OF THE SYSTEM. Application for an individua; pewage dis sa1 permit is hereby submitted. The undersigned acknowledges that the above information is true and that false info to will 1 validate the application and any subsequent yermit. Signature of Applicant ` DATE G G (This application becomes. invalid/12 months from the above date.) NOTE: PLOT PLAN must be filed with this application. Please locate the following items by measured distances: Z. Property lines and dimensions. 2. Proposed and existing water wells on subject property and adjacent property. 3. Domestic water service lines. {. Proposed and existing buildings, driveways, and other . structures. S. Streams, lakes, ponds, irrigation ditches, and other water courses. 6. Proposed and existing individual sewage systems on subject property. SUBMIT A REVISED PLOT PLAN PRIOR TO CONSTRUCTION IF INSTALLATION IS TO BE CHANGED FROM ORIGINAL PLAN. The undersigned hereby acknowledges receipt of this individual sewage disposal permit a pli ation and a permit fee in the amount of S ��� , Receipt Number Date Fee Received by k.4 C Administrativo officer 130 South Galena Street Aspen, Colorado 81611 303/925=2020 1� PITKIN COUNTY ENVIRONMENTAL HEALTH Field Test Data Sheet on Percolation Test PROPERTY OWNER PHONE MAILING ADDRESS LEGAL DESCRIPTION OF PROPERTY ��d N LOCATION OF TEST HOLES Three (3) test holes required per system ^ N A Test Hole Depths (24" minimum) J ci Diameter of Test Holes Water remaining after 8 hour soak `+ TEST HOLE No -1 Drop Time TEST HOLE No. 2 Drop TimeDrop Z7/ 1-. �' �S TEST HOLE No. 3 Time � b - 'SS 5 cD a 2 2=1 -kms L Percolation Rate Each Hole Average Rate. .��p� j.`► \ �SI1� �DD Comments on soil or site: e7 QVA,,"-\ gb Signature � Date SCNMUESER %- --DON MEYER INC. June 25, 1991 Mr. Bob Nelson Pitkin Co. Environmental Health 130 S. Galena Aspen, Co. 81611 RE: Gerdin ISDS Dear Bob: ui urana Avenue, Suite z -t Glenwood Springs, Colorado 81601 (303) 945-1004 (303) 925-6727 Fax (303) 945-5948 `JUN 2 8 1991 ENVIRONMENTAL HEALTH ASPEN/PITKIN Schmueser Gordon Meyer performed 3 inspections of the Gerdin ISDS and I am writing this letter to certify that the system was Installed per SGM Plans and Specifications. As you will recall, we originally designed the ET bed to be located on a different site within the property. During final construction, a more suitable site was located and we have attached the following "redlined" plan which identifies the new location of the bed. The map attached serves as an as built drawing of the system installed. To reiterate, this letter is certifying the system installation as well as transmitting the revisions made to the ISDS. I hope this information serves its intended purpose. If you have any questions or comments, please don't hesitate to call. Sincerely, SCHMUESER GORDON MEYER, INC. Jere ey S. Simonson, P.E. cc: Victor Gerdin �p0� �v S. S/ W 26152 2 i \� WN • \�\ 0 Al ,( i"U SCHMUESER GORDON MEYER INC. April 11, 1990 1V 1QI lu /1V GI 1U 1 -- L Glenwood Springs, Colorado 81601 (303) 945-1004 (303) 925-6501 Fax (303) 945-5948 W4 Mr. Victor Gerdin P.O. Box 8979 Aspen, CO 81612 RE: Proposal For Professional Services Fbr Individual Sewage Disposal System (ISDS), Old Snowmass Creek Dear Victor: This letter is being written to provide a letter of propsal for engi- neering services to design an ISDS for the above mentioned location. It is my understanding that the proposed residence will be a 3 -bedroom house with 2-1/2 baths. We have received the information that you have sent us which includes a topo map of the property and the field test data sheet on the percolation test performed by the Pitkin County Environmental Health Department. Using these two items, along with the bedroom count in the home, we will be able to provide you with a design for a sewage disposal system. On a preliminary review of the information, it appears the system will be of an evapo-transpiration (ET) type system. Depending upon the swelling potential of the on-site clays, it is still uncertain whether or not the system will need to be lined or an unlined ET system. We would propose to do this scope of work for a fee of between $500 and $750. I have attached a standard contract used by SCM with its clients. Please sign both copies and return one copy to us for our files. If you have any questions or comments, please do not hesitate to call. Sincerely, SCHMUESER GORDON MEYER, INC. i� i� ,1 Je S. JSS.l�c/998 Enclosures 'E t Simonson, P. E. PITKIN COUNTY ENVIRONMENTAL HEALTH Field Test Data Sheet on Percolation Test 1 / PROPERTY OWNER C�QI �d' ^� PHONE MAILING ADDRESS �^� 5�— LEGAL DESCRIPTION OF PROPERTY LOCATION OF TEST HOLES Three (3) test holes required per system Test Hole Depths (24" minimum) Diameter of Test Holes Water remaining after 8 hour soak Average Rate �n / \l U � ( 0b v'^ V I V �i = c , l IJ —.-�-- `I k �h 1154 Comments on soil or site: G . C 7 QAN \cam' Date' %" 1 Signature' I' `L 100 rti P . . . . � x ' ' � NE CORNER I / 1 Ir I / o +13l 5' 'o 7 / t 136. 1 '\ g0• � 7 � - ,� CV S\ 135.0' I pQ ,1 0 ' / h Z NW CORNE: SECTION 22 N8112'45" w \ \ + 123.3 � I 353 •24 Z'TS \ \ \ \ 25' CLASS 160 PVC PIPE FROM DOS/ G TANK T SCRUB OAK J DISTRIBUTION BOX. (SLOPE LYNE f OM DIST. B�X BACK 06 \ \ \ TO DOSING TANK) ) / ! } 130.2' 4- 126.8' 4 ' SOLID WALL P1 E / °, / ASTM 27)29 FROA f HO I P _ TO SEPTIC TANK. \\\ �!\•\ \ °w DITR/BUT/ON BOXO• / ✓ / (SLOP 0I/4" ERF ETA BED / UNj/ \ �n SEE DE TA <^\ 8UlLDING ENVELOP \\ 4" ID WALL729 15-\\ AS 01 SLP ! l/4" \ MIN.) i 1 INLET 7 OUTLETS DISTRIBUTION Box EXIS77NG GRADE J, 3' i 2:1 SLOPE ` RNISHEO GRADE PROVIDE SWALE TO DIVERT - RUN -OFF AROUND E.T. BED AIR VENT SEE DETAIL BOTTOM OF BED TO BE--' CONSTRUCTED IN NATURAL GROUND, BELOW TOPSOIL LO Pr NA g S£TB C LINE SW CORNER EL. 100' Sl TE PLAN SCALE 1" = 50' 30' 6' T" WASHED SAND -1 BOTTOM OF BED SHALL BE LEVEL 0. 1 t, SCARIFY BEFORE PLACING ROCK 6' SECTION A -A 6Atl�d SCALE: 1"= 3' = LEVEL ALARM AAO CpAAECTIOV B1Y 4"PLC SLOPE 6 "/FT. MW 4W7F LME FROM ACY.SE COA11EL7S 7D AAXM VENT SYSTEM 5'AM 100 x-'11 .2 0j R, / p0 hAU6,C Ar 1�,tvi? br KD IOOQ GALLON - So• C NGRETE SEPT/C TANK 50OW KJ\% 05.7' / LINE SANDY TO OIL VARIES FROM 6" A CENTER TO 2" AT DGES SE CORNER UNDERGROLAO CABLES FOR PLAW B ALARM CONTROL 20" DIA. RWR PIPE PA4 PUAPAG NAM' B4FFL£ /000 GALLON COAL SEP 7C MW T YPICAL INS TALLATION I UnIE SErEALK5 f -TA 06V @' WIVE K 161' L.471Jb- N SANDY TOPSOIL VARIES FROM 6" AT CENTER A I TO 2" AT EDGES 5T Dom SITE 1 � p 12 R8 'Tb 4 l v� I 1'S 18 ►� gSPEf 1 1 is7'. RF'NEDK,T v L' N MONASTERS 21 1i I -I' / 27 26 25 .v: I' VIG►NITi MAP SCALE I = 1.5 MILES O .'15 I.S 'S M!LES -4" PVC (ASTM 2729 SLOPE 0%FT. (TYP. 13" OF 1/2" TO 2-1/2" CLEAN ROCK 3' MIR4F1 FABRIC OR 4" OF STRAW 2:1 SLOPE __ - 4" .SOLID WALL ASTM 2729 SLOPE O"/FT 4" SOLID WALL PVC ASTM 2729 DISTRIBUTION BOX (SLOPE R 1/4" PER FT. MIN.) FrFl Ll �UINA� ALLOW EXTRA CABLE ON POWER PPE 8 FITTINGS FOR B ALARM CABLES 70 R£MO VE Paw 115 tri B PIPING W/O D/SCOANECTMG WRMG /5 AMP CA4CUIT Yon Vtl1� /5 AMP C/RCUT BREAKER FO/j BREAKER FOR PUMP X/6-2 COADUC70R CORD ALARM 4' PLC : C1 PIPE 70 70 FLCA ALARM CONTROL SOLID GROUND CI PPE, PLAW ON UNDERGROUND BURNED CABLE BETWEEN N BOTi."DOF PIPE MA/0 B GROUT EXA4TMG EITHER ROLN) OR FLAT SJ ELECTRO MODEL TANK ALERT /1 PLUS WASE AAGLE PJGGY ✓5/0.5 PVC BUU M S/ ELECTRO SYSTEMS) BACK FL04T 3W17VH ----- M£RSSLE EFFLUENT ALARM BOX -: PUNP (BY HYDROMA770 LOCATED NII COA4CRETE BLOCK TAAK CL7[O EAP OLll11G IAMY /V,gMLL 4"101A. HOLE -- N HOUSE 7AMCBDT7AM TANKS. PUMP 8 CONTROLS PT4-2 COAVU 70R CABLE W/ GROUND WIRE LSE I/2-2 CONDLCIOR W/ GROLNO F OVER 60' - a116-3 C0AVUC7UR LORD TO PIAMW STRAN RELEF ,t'14-2 LOAC&CIOR CABLE FOR ALARM CONTROL TO ALARM FLOAT W0WWRE CEL AK MA BREAKERR PAA W/R/NG CONNECT/ONS FOR ALARM BOX & AWS -1 LEVEL CONTROL ALARM AAO CpAAECTIOV B1Y 4"PLC SLOPE 6 "/FT. MW 4W7F LME FROM ACY.SE COA11EL7S 7D AAXM VENT SYSTEM 5'AM 100 x-'11 .2 0j R, / p0 hAU6,C Ar 1�,tvi? br KD IOOQ GALLON - So• C NGRETE SEPT/C TANK 50OW KJ\% 05.7' / LINE SANDY TO OIL VARIES FROM 6" A CENTER TO 2" AT DGES SE CORNER UNDERGROLAO CABLES FOR PLAW B ALARM CONTROL 20" DIA. RWR PIPE PA4 PUAPAG NAM' B4FFL£ /000 GALLON COAL SEP 7C MW T YPICAL INS TALLATION I UnIE SErEALK5 f -TA 06V @' WIVE K 161' L.471Jb- N SANDY TOPSOIL VARIES FROM 6" AT CENTER A I TO 2" AT EDGES 5T Dom SITE 1 � p 12 R8 'Tb 4 l v� I 1'S 18 ►� gSPEf 1 1 is7'. RF'NEDK,T v L' N MONASTERS 21 1i I -I' / 27 26 25 .v: I' VIG►NITi MAP SCALE I = 1.5 MILES O .'15 I.S 'S M!LES -4" PVC (ASTM 2729 SLOPE 0%FT. (TYP. 13" OF 1/2" TO 2-1/2" CLEAN ROCK 3' MIR4F1 FABRIC OR 4" OF STRAW 2:1 SLOPE __ - 4" .SOLID WALL ASTM 2729 SLOPE O"/FT 4" SOLID WALL PVC ASTM 2729 DISTRIBUTION BOX (SLOPE R 1/4" PER FT. MIN.) FrFl SAND 4" PVC (ASTM 2729) ° PERFORATED PIPING ROCK 4" TEE, DO NOT GLUE 4" AIR VENT SEED TOPSOIL STRATA - MIRAFI FABRIC ROCK MOUNDED N ABOVE PIPE PERFORATIONS STRATA ., AIR VENT DETAIL - SCALE 1"= P -O" OR EQUAL 4" PERFORATED PVC b ASTMO"I - SLOPE O"/FT. (TYP.)Np' F_ �o AIR VENT (2 REO D) e SEE DETAIL EVAPO - TRANSP/RA TION BED DETAIL SCALE.- 1"= 10' CLEAN-OUT DETAIL GENERAL NOTES.- 1. OTES:1. All materials, installation practices, setback requirements, etc., shall comply with the Pitkin County Individual Sewage Disposal System Regulations. 2. The ET. bed shall be constructed so that the bottom is level t/-0. 1 inches. Place bed in natural ground," no portion of the bed shall be placed in fill. J. Provide adequate surface water diversion to assure that runoff does not enter the evapo-transpiration bed. 4. Stone shall be 1/2" to 2-1/2" screened rock. 5. Sand shall be 0.5 to 1.0 mm effective size with a uniformity coefficient of 4 or less. 6. The recommended bed seeding is blue gross at 4 to 6 /bs/100 sq.ft All other areas disturbed by construction shall be reseeded with native grasses to prevent erosion. 7. The location of the bed may be adjusted in the field to better fit the sife, provided all setbacks are met. 8. Piping in system shall be slandard perforated sewer pipe. ASTM 2729 -Sewer and Drain Leachfield Pipe. 9. 4" PVC tees should not be glued to enable observations of water level in system and to remove excess salts accumulation or surplus water, if necessary. 10. Use risers as needed to bring septic tank access hatch within 6" of finished grade. 11. Cast iron pipe of equal strength or other pipe properly supported to prevent failure by settling shall extend from tank for a distance of at least five feet (5 J from the inlet and outlet ends. 12. The Contractor and Owner shall take whatever measures are necessary to assure that (o) septic tank and sewer lines are completely water tight, and (b) the system is to heinstalled to prevent freezing of all pressure and gravity sewer lines. 13. The Pitkin County Environmental Health Department and the Engineer shall be notified when construction commences and kept abreast Of the construction progress so that sufficient inspection can be performed to assure conformance with these plans. Provide o minimum of 48 hours notice to each. DESIGN CALCULATIONS ------------------- 1. 3 BEDROOM HOME, ASSUME 2 PERSONS/BEDROOM AND 75 GPCD. 2. DETERMINE FLOW.• ' Q = (2)(3)(75) = 450 GPD 3. SEPTIC TANK SIZE FOR 3' BEDROOMS = 1000 GALLONS 4. ALLOWABLE LOADING RATES., DESIGN FOR COMBINATION ABSORPTION/EVAPO-TRANSPIRATION METHOD OF EFFLUENT DISPOSAL. PERC TEST RESULTS: 100 MPI, FOR PERC > 60 MPI USE A LOADING RATE = 0.20 GALLONS/S.F./DAY EY,APO-TRANSPIRATION: USE STANDARD E7- RATE FROM 32 PAN OF 0.135 GALLONS/S.F./DAY 5. DETERMINE BED SIZE: FOR ABSORPTION: Q = (ARE4)(L.R.)1(1.95 - (0.055)(L.R•)) FOR EVAPO-TRANSPIRATION: Q = 0.135(AREA) 6. COMBINE EQUATIONS AND SUBSTITUTE Q(ABSORPTION) + Q(ET) = 450 A(L.R.)/(1.95 - (0.055)(L.R.)) + 0.135(A) = 450 A = 1889.60 S. F. USE A 30' X 63' BED SIZE, EFFECTIVE AREA = 1890 S.F. dill - USE 45TH BO PLC ALLOW EXTRA CABLE ON POWER PPE 8 FITTINGS FOR B ALARM CABLES 70 R£MO VE Paw PiMIP S P~ N TANK B PIPING W/O D/SCOANECTMG WRMG 24" DIA. RISER PIPE 2" CL /60 PLC 70 MOUJD, SLOPE TO DRAIN BACK TO TANK 4' PLC : C1 PIPE 70 SOLID GROUND CI PPE, PLAW ON DRILL/A. HOLE BETWEEN N BOTi."DOF PIPE MA/0 B GROUT EXA4TMG NoLar HOLE TANK ALERT /1 PLUS SYSTEM FLOAT (BY f M S/ ELECTRO SYSTEMS) T-7 SW33 LATER N SUB- ----- M£RSSLE EFFLUENT . .. . • -: PUNP (BY HYDROMA770 /000 GALLON Ca%C SEPWB" COA4CRETE BLOCK TAAK CL7[O EAP OLll11G IAMY /V,gMLL 4"101A. HOLE -- B"ABOVE 7AMCBDT7AM TANKS. PUMP 8 CONTROLS SAND 4" PVC (ASTM 2729) ° PERFORATED PIPING ROCK 4" TEE, DO NOT GLUE 4" AIR VENT SEED TOPSOIL STRATA - MIRAFI FABRIC ROCK MOUNDED N ABOVE PIPE PERFORATIONS STRATA ., AIR VENT DETAIL - SCALE 1"= P -O" OR EQUAL 4" PERFORATED PVC b ASTMO"I - SLOPE O"/FT. (TYP.)Np' F_ �o AIR VENT (2 REO D) e SEE DETAIL EVAPO - TRANSP/RA TION BED DETAIL SCALE.- 1"= 10' CLEAN-OUT DETAIL GENERAL NOTES.- 1. OTES:1. All materials, installation practices, setback requirements, etc., shall comply with the Pitkin County Individual Sewage Disposal System Regulations. 2. The ET. bed shall be constructed so that the bottom is level t/-0. 1 inches. Place bed in natural ground," no portion of the bed shall be placed in fill. J. Provide adequate surface water diversion to assure that runoff does not enter the evapo-transpiration bed. 4. Stone shall be 1/2" to 2-1/2" screened rock. 5. Sand shall be 0.5 to 1.0 mm effective size with a uniformity coefficient of 4 or less. 6. The recommended bed seeding is blue gross at 4 to 6 /bs/100 sq.ft All other areas disturbed by construction shall be reseeded with native grasses to prevent erosion. 7. The location of the bed may be adjusted in the field to better fit the sife, provided all setbacks are met. 8. Piping in system shall be slandard perforated sewer pipe. ASTM 2729 -Sewer and Drain Leachfield Pipe. 9. 4" PVC tees should not be glued to enable observations of water level in system and to remove excess salts accumulation or surplus water, if necessary. 10. Use risers as needed to bring septic tank access hatch within 6" of finished grade. 11. Cast iron pipe of equal strength or other pipe properly supported to prevent failure by settling shall extend from tank for a distance of at least five feet (5 J from the inlet and outlet ends. 12. The Contractor and Owner shall take whatever measures are necessary to assure that (o) septic tank and sewer lines are completely water tight, and (b) the system is to heinstalled to prevent freezing of all pressure and gravity sewer lines. 13. The Pitkin County Environmental Health Department and the Engineer shall be notified when construction commences and kept abreast Of the construction progress so that sufficient inspection can be performed to assure conformance with these plans. Provide o minimum of 48 hours notice to each. DESIGN CALCULATIONS ------------------- 1. 3 BEDROOM HOME, ASSUME 2 PERSONS/BEDROOM AND 75 GPCD. 2. DETERMINE FLOW.• ' Q = (2)(3)(75) = 450 GPD 3. SEPTIC TANK SIZE FOR 3' BEDROOMS = 1000 GALLONS 4. ALLOWABLE LOADING RATES., DESIGN FOR COMBINATION ABSORPTION/EVAPO-TRANSPIRATION METHOD OF EFFLUENT DISPOSAL. PERC TEST RESULTS: 100 MPI, FOR PERC > 60 MPI USE A LOADING RATE = 0.20 GALLONS/S.F./DAY EY,APO-TRANSPIRATION: USE STANDARD E7- RATE FROM 32 PAN OF 0.135 GALLONS/S.F./DAY 5. DETERMINE BED SIZE: FOR ABSORPTION: Q = (ARE4)(L.R.)1(1.95 - (0.055)(L.R•)) FOR EVAPO-TRANSPIRATION: Q = 0.135(AREA) 6. COMBINE EQUATIONS AND SUBSTITUTE Q(ABSORPTION) + Q(ET) = 450 A(L.R.)/(1.95 - (0.055)(L.R.)) + 0.135(A) = 450 A = 1889.60 S. F. USE A 30' X 63' BED SIZE, EFFECTIVE AREA = 1890 S.F.