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Home My WebLink AboutBENBECCA Lots 1-15 S-8128 MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION Environmental Health Division CASE REVIEW WORKSHEET ~ -~'~ ''~ ~ CASE NUMBER: ~ ~"~9 ~' '"' DATE RECEIVED: I COMMENTS DUE BY: S-8128 ~~7 April 25, 1985 I May 17, 1985 SUBDIVISION OR PROJEC~ TITLE: Lots 1 - 15 Bending Birch Subdivision PUBLIC WATER AVAILABLE ( )(~') PUbLiC SEWER AVAILABLE COMMUNITY WATER AVAILABLE ~'/,?_~ -' , . . / 71-014 (Rev, 5/83) DEPT.'eF ENV IRON MENTAL CONSERVATION ANCHOI~E/WESTERN DISTRICT OFFICE 437 "E' STREET, SUITE 303 ANCHOiII~E, ALASKA 99501 BILL .SHEFFIELD, GOVERNOR 274-2533 Mr. To~en Spurkland, P.E. 203 W. ~5th Avenue "C" Suite ~ Anchorage, Alaska 99501 March 14, 1985 SUBJECT: Bending Birch Subdivision', Lots 1-15 ChugiaX, Alaska (8521-DA-126) Dear Sir: We ha~ reviewed the plans and specifications for the subject project. This l~tter constitutes the permit required by A.S. 46.03.720(a) for approw~l of sewerage systems. It should be remembered tnat final approval will necessitate the submission of En~neer As-Built Plans. This will conseouentiy manoate tnat a orivate profe:ional engineer conauct basic inspection of this oro3ect so as to De able Im sign off on as-built plans. Arranoement fo~ t~is inspection work is the responsibility of the aeveloper. Any future expansion of subject projec~. will require aoditional approval from this office. Sincerely, Environmental Engineer SWE/ms~ _CONSULTING ENGINEER 203 W. 15th AVE '°C" SUITE 203 ANCHORAGE, ALASKA 99501 TELEPHONE: (907) 279-391G LOG OF' TEST HOLE NO. LOT' ~: 1B.1ENI~IN~ 'E~II~'C..I-% DATE: LOCATION: TEST PIT LOGGED BY MATERIAL DESCRIPTION CONSULTING ENGINEER 203 W. 15th AVE "C" SUITE 203 ANCHORAGE, ALASKA. 99501 TELEPHONE: (907) 279-39;~ LOG OF TEST HOLE NO. DATE; .. LOCATION= TEST PIT LOGGED BY= MATERIAL DESCRIPTION CONSULTING ENGINEER 203 W. 15th AVE 'C' SUITE 203 ANCHORAGE, ALASKA 99501 TELEPHONE: (907) 279-3916 LOG OF TEST HOLE NO. LOT ~, '~ENDtNG DATE= LOCATION: TEST PIT LOGGED BY~ LO~ ~'1"~. -..- MATERIAL DESCRIPTION o~~c~ CO.__NSU LTING ENGINEER 203 W. 15th AVE "C" SUITE 203 ANCHORAGE, ALASKA 99501 TELEPHONE: (907) 279-3916 LOG OF TEST HOLE NO. LOT 14 ~.ENI)IN& 'lS~lACH DATE: LOCATION: TEST PIT LOGGED BY: ~0~ BOT~.g:~-~.. .... MATERIAL DESCRIPTION ~CONSULTING ENGINEER 203 W. 15th AVE "C" SUITE 203 ANCHORAGE, ALASKA 9~a01 TELEPHONE: (907) 279-391- LOG OF TEST HOLE NO. 5 D~TE~ LOCATION: TEST PIT LOGGED BY: ~O~ ~U'['~.1:r~A ..... MATERIAL DESCRIPTION Spurkland Engineering 203 W 15th #203 Anchorage, AK 99501 279-3916 BENDING BIRCH SUBDIVISION Supplemental Bid Specifications (Preliminary-subject to change by Engineer) Sewer Line a. Ail main sewer line to be 8" Class 50, Ductile Iron pipe with o-ring bell and spigot "Tyton" type joints, properly bedded and backfilled. (Class C bedding). Tolerance from established line and grade not to exceed 0.03 feet. b. Manholes to be type A, 48" diameter with a 25" access diameter. Precast concrete or poured in place concrete type. c. Pipe laying to proceed uphill. Native materials may be used for bedding above the spring line of the pipe when properly compacted to 95% density. d. Cleanout at East end of sewer line to be installed as per AWWA C-151. e. System may be subject to pressure testing to' be provided by contractor as an extra charge. Sewer Connections a. 4" service connect stub to be installed for each lot, 5' inside lot line with location marked with a 2x4 post. b. Acceptable pipe is Ductile Iron with. Tyton joints, cast .iron with Ty-seal joints, cast iron with "Romax" no-hub joints. Minimum slope 1/4" per foot. c. Construction and materials for connects shall be as specified in the 1985 AWWA Design Criteria for Sanitary Sewer Sections 33.01 - 33.03. Septic Tank a. 10,750 gallon-2 compartment, 8' diameter septic tank' approved by State D.E.C. and Municipal codes. be outlet. c. Mechanical couplings to be installed on inlet and Two 4" stand pipes .to be installed for cleanout. d. Tank to be ~roperly bedded and backfilled. If high water table is encountered appropriate anchoring may be necessary as designed by engineer as extra charge. LIFT ~TATION a. A lift station to be instal, led of poured in place Class A-3 concrete or pre fab corrosion resistant steel with a 3000 .gallon storge capacity.below the septic tank outlet invert. Ac- cess to lift station to be thru a lockable steel manhole type cover. b. Two wastewater pumps to be provided to operate in alternating fashion. Each pump to have a capacity of 100 G.P.M. at a total lead of 40 feet with inlets capable of passing 3" spheres. Each pump shall have an individual intake with wet well floor designed to avoid turbulance near the intake. c. Submersible pumps and motors shall be designed and supplied by the same manufacturer, specifically for effluent sew- age use including totally submerged operation during a portion of each pumping cycle. .The motor shall be of squirrel-cage type design without.brushes or other arc producing mechanisms. d. Suitable Anchorage Water and Wa~tewater approved shut- off and check valves shall be placed on the discharge line of each pump. The check valve shall be located between the shutoff valve and the pump. Check valves shall be suitable for the material being handled, and at an elevation higher than the maximum wet well level. Valves shall be capable of Withstanding normal pres- sure and water hammer, and be of the sprint'and level type 'to allow manual back flushing of pumps. e. Mercury switch type level controls shall be used to control sump level. To .control automatic operation of pumps, three mercury switch level controls shall be supplied. Two of these controls act to close circuit for on-off operation at se- lected levels required and to oper'ate alternator for alternation of pump on each cycle of operation. A third control acts as override and closes circuits of override to operate.both pumps together. A fourth control acts at.high water'level to close circuit of alarm.system. f. Control Cabinet of Specifidation NEMA 4 enclosure shall be furnished. For single phase pumps the control panel shall include - contractors' for each pump, circuit breakers for each pump, and H-O-A switches for each pump, and an alternating relay circuit. g. The high water alarm shall include an alarm bell or alarm horn and to be supplied in separate enclosure mounted 8" high. Includes a warning light and silencing switch. Force Main a. 4' Ductile Iron pipe, Class 52, installed with 10' minimum burial depth properly bedded and backfilled. b. Type II Continuity straps to be installed on each joint in accordance with M.O.A. standard specifications for water systems. Continuity test to be made on completed system. c. Pressure testing by contractor is required. d. ~orce main to spill into a type "A" manhole exiting from which will be the leach.field header. Septic Leach Field a. Leach field to.be installed as per Municipal and State codes with levels taken from engineer established benchmark with deviation from level not to exceed 3" per 100' ih length of trench. b. A 4" P.V.C. ASTM - 3034 header pipe to exit manhole to supply the trench system leach field. Each trench leach pi~e will tee into header with a drop in elevation from header. · c. Trenches are 5' wide, 4' total 'depth with 2' of gravel under leach pipe and 4' of mounded soil cover (over completed trench). There are 21 wide trenches, 75' long and spaced 6' apart (trench wall to trench wall). d. Trenches to be excavated so that no machinery is run on the trench bottom and septic rock is to be placed from the side so as not to compact trench bottom. e. Septic rock is to be 1/2" to 2 1/2" screened gravel specified sewer drain rock. Washed gravel is preferred if availa- ble. trench. A filter fabric material is to be placed over completed g. All M.O.A. construction standards and State D.E.C. guide- lines ~are applicable to the construction of septic leach area. h. The elevation of the trenches may be changed upon final construction survey. This would possibly change total depth of trench to 3' and 1' additional mounded cover required. General Unless otherwise noted here in, on the plan or'by written notice from the engineer all sewer system installation will be as required by AW-WU. 1985 Design Criteria for Sanitary Sewer, M.O.A. 1984 Standard Specifications Division 50, 1983 State of Alaska D.E.C. Wastewater Disposal Regulations 18-AAC 72, M.O.A. Waste- water disposal ordinance and code, latest editions of the Uniform Mechanical Code, Uniform Plumbing Code and National Electrical Code. All work subject to inspection and approval of engineer. ,/l I , I|' I ! !