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Home My WebLink AboutLot 14John Wells Block 5 Lot 14 #014-261-26 Not eligible for Health Authority Approval because Pit Well does not meet code Municipality of AYichorage e K .e t ` PA. Gia I'.XJfi50 • Anchom r., 9 .F&%(907)3A3.&2(X) a t Alnska 9!I,iIJ fif:�() •Telephone (J07) 343�S:S01 • 1'az lSX)7):ii.9�fi^(X) 47(X) llmgaw Strecl • Mkhomgc, Alaska EM07 s • r . Mayor Mark Be#ich "'' 'mmni.org I3uilding Safety Division May 18, 2005 Cindy Ellis Watkins Engineering P.O. Box 110443 Anchorage, Alaska 99511 Subject: Waiver Request for John Wells Block 5 Lot 14 Waiver Request WR#: 050030 Parcel ID # 014-261-26 HA/Permit # Dear Cindy Ellis: Your request for a waiver of the required 100 feet horizontal separation from the absorption field and septic tank to private well has been approved. The approved separation distance is 90.0 feet. This waiver applies to Lot 14 Well to Lot 6 Septic Tank and absorbtion field only. This waiver approval applies to the existing absorption field and septic tank to private well separation only. Any future upgrade to the on-site wastewater disposal system will require all separation distances be met or another approval from this department. If there are any further concerns or questions regarding this waiver, please call our office at 343-7904. Sincerely, J Goodall lull Engineer On -Site Water R Wastewater Program Community, Security, Prosperity Municipality of Anchorage Development Services Department • Building Safety Division On -Site Water and Wastewater Program 4700 Bragaw Street P.O. Box 196650 Anchorage, AK 99519-6650 www.ci.anchoragc.ak.us (907)343-7904 Waiver Review Worksheet WR#:050030 PID#:014-261-26 HA/Permit# HA050205 Date Received: May 18, 2005 Legal Description: John Wells Block 5 Lot 14 Engineer. Cindy Ellis Watkins Engineering P.O. Box 110443 Anchorage, Alaska 99511 Applicant: Darwin Sprinkle Waiver Requested: Lot 14 Well to Lot 6 Septic Tank and Absorbtion Field, 90 foot Horizontal Separation Criteria: Geology Points: A. Water Table 7.23 B. Soil Sorption 3.47 C. Permeability 2.51 D. Water Table Gradient 2.90 E. Horizontal Separation 2.6 Total:.. _ _ 18.711 Waiver is Granted: X Waiver Is not Granted. List Conditions or Reasons for above: Date: 5118/05 By: Joe Goodall Name of Reviewer Rec#: 67838 Amount: $1M Date Paid: 5/1812005 State of Alaska: Separation Distance Waiver Guidelines for S.C.R.O. (State of Alaska Memorandum to District Office Engineers dated January 3,1985) Waiver Request for. John Wells Block 5 Lot 14 Parcel I D#: 014-261-26 Waiver Request Number WR#: 050030 Waiver Requested: Lot 14 well to Lot 6 Septic Tank and Absorbtlon Field, 90 foot Horizontal Separation Engineer Cindy Ellis IIA050205 Septic Tank Data The septic tank on John Wells S/D Block 5 Lot 6&15 was installed in 1982. The permit was issued by the Onsite department however the tank was placed 90' away from the well located on Lot 14. The tank and leachfield installed in 1982 that encroached three wells has been in existence for over 20 years. Watkins Engineering took water samples for each of the encroaching wells. And all three tested with- in Municipal standards. Well Data John Wells S/D Block 5 Lot 14 does not have a well log to be found. However Watkins Engineering during their Health Authority Inspection determined water samples tested to be 0 coliform, 0 mg/I nitrates, and elevated other bacteria. Lot 14 well is a pit well and does not meet health standards because well head is not protected and does not have an approved sanitary seal. Because of this Watkins Engineering determined the elevated bacteria is coming from the out of code pit well with no sanitary seal. The condition of this pit well was notified to the health department and should be investigated further by the health department. Other well logs in the area shows there is a confined aquifer with an impermeable layer of blue clay and hardpan at 40 ft to 140ft. Using averages and Lot 18 well log determined 83 feet of impermeable layer. State of Alaska: Separation Distance Waiver Guidelines for S.C.R.O. (State of Alaska Memorandum to District Office Engineers dated January 3,1985) Waiver Request for. John Wells Block 5 Lot 14 Parcel I D#: 014-261-26 Waiver Request Number WR#:050030 ,,:,v;::Ver'dve Xk Waiver Requested: Lot 14 Well to Lot 6 Septic Tank and Absorbtion Field, 90 foot Horizontal Separation Engineer Cindy Ellis IIA050205 Water Table Depth of well: 152 Depth of septic system: 8 144 Distance from the bottom Point Clean Gravel of the system to the highest value 1 water table in feet 1.5 Sand w/ Small Amt of Clay 0 0 8 1 17 2 24 3 30 4 40 5 85 6 100 7 290 8 1000 9 10 ' Straight line Interpolation is permitted between any two values Soil Sorbtion Soil Type Point Value Clean Gravel 0 Fractured Rock 1 Course Clean Sand 1.5 Sand w/ Small Amt of Clay 2.5 Silt 3.5 Clay and Sand Equal 4.5 Clay 6 Points ,.,, 7.23 Points 3.47 X12.5+r 114.5+r; 1.5+r 44 1j 0 + (144, 0 + r 11 0 + r 11 0 + r11 0 0.6 + 2.6 + 0.3 + 0 0 + 0 + 0 + 0 'Use the predominant soil type but values can be averaged for a mixture Permeability Soil TvPe Polnt Value Ciay(will channel) 0 Silt and Sandy Clay 2 Clayey Sand 3 Fine Sand 1.5 Sandy Gravel 1 Fractured Rock 0.9 Course Sand (30 grit) 0.4 Clean Gravel 0 Points 2.51 f 34 L 44, 3 +f 83 144, 3 +r 44 1 .4 + 144) 1 +(-1-44—) 1 +r 144, 1 + l 144, 1 + f l 144) 1 0.71 + 1.73 + 0.08 + 0.00 0.00 + 0.00 + 0.00 + 0.00 •Use the predominant soil type but values can be averaged for a mixture Gradient 2.9 %Slope Points value -30% 0.3 Separation -20% 0.7 slopes toward well -10% 1.2 25 -5% 2 1 0% 2.9 }' fiat 5% 4.5 5 10% 6 slopes away from well 60% 7 •If the gradient is unknown, assume the worst case Horizontal Horizontal Point Separation Value In Feet 0 0 25 0.7 50 1 75 2 100 3 150 5 200 6 300 7 Points ,.,, 2.90 Points ,,,, Pflj •Linear Interpolation between two point value is acceptable. Horizontally means straight line distance to the well not the contaminate travel distance to water table which may be greater. Conclusion: Grant Waiver Total Points:l 18.7111 a.I Ir if WWII ail rt e 1 A �r.,L7 iTT, _ - -±� • r'.. I le . Xf♦! /I�' ('"'. y � {Y t"[) -'0.•r I s fir\ ;, � 'ti' �' • � N+r .• �;:! t �^ �� 1 .•�� fIz `J� ,d a a C,�-• d j:, IN ♦ 1f• r• r 1 s rF14 � n.' Al//♦♦ 1 a...,yy 1-'�'".'LS«.e/ i ( �'f' . /` ,�•.. . _ . • \_. 1.� q',.• tea.. r. '.� DATE: May 18, 2005 TO: FILE oa e MUNICIPALITY OF ANCHORAGE Building Safety Division s err MEMORANDUM IS • FROM: Joe Goodal4ite Engineer II, Water Wastewater Program SUBJ: JOHN WELLS BLOCK 5 LOTS 6&15 THE FOLLOWING WAIVERS WERE DONE WITH HEALTH AUTHORITY APPROVAL NUMBER HAO50205: (WR050029) - LOT 15 WELL TO LOT 15 SEPTIC TANK, 55 FEET HORIZONTAL SEPARATION DISTANCE. AND LOT 15 WELL TO LOT 5 SEPTIC TANK, 90 FEET HORIZONTAL SPARATION DISTANCE. (WR050030) - LOT 14 WELL TO LOT 6 SEPTIC TANK AND ABSORBTION FIELD, 90 FEET HORIZONTAL SEPARATION DISTANCE. (WR050031) - LOT 16 WELL TO LOT 15 SEPTIC TANK, 70 FEET HORIZONTAL SEPARATION DISTANCE. MONDAY 5/16/05, CINDY ELLIS, DAN ROTH AND I MET TO RESOLVE THE WAIVER ISSUES. I HAVE BEEN AUTHORIZED BY DAN ROTH TO APPROVE THE ABOVE WAIVER ASSOCIATED WITH THE HEALTH AUTHORITY APPROVAL HA050205