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HomeMy WebLinkAboutT15N R1W SEC 4 LT 42T15N, R1W, 5¢ction 4 Lot 42 #051-072-39 MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND HUMAN SERVICES Environmental Health Division 825 "L' Street, Anchorage, Alaska 99502, Telephone 264-4720 ON-SITE SEWAGE DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT Name DISTANCES ~ SEPTIC ADSORPTION ^dd~ess WELL , Phone(si PermgNo. ND. OrBed ms WELL I O~  BJoCk I Subdiv*sion Lo~ ~Z n/~ ~/A FOUNDATION I 3 ' AS-BUILT DIAGRAM (Show location of well, septic system, p~ope~y lies, foundation, TANKS T Manulacturer Capacgy in gallons TYPE OF SYSTEM : '~' ~ TRENCH ~ BED ~ W. DRA~N ~ OTHER FT Fill added above original grade Gravel depth beneath pipe Gravel length Gravel width WELLS ~ PRIVATE ~,,~ ~ OTHER (Identify) REMARKS: I cedily that thic inspe~ion was pedormed acco[ding Io all ~unicipal afld State guidelines in ellecI on ~is ~ /~/~ ~ 72-013 (3/85) 100 4o ~0 20 10 200 100 10.0 1.0 0.1 0.01 0.00i GRAIN SIZE - mm ~est I Z.+75- GRAVEL ~. SAN]] ~. SILT I Z CLAY 0°0 98.1 1.~ LL PI ]]10 Cc C~ 0 0 2.00 0.95 MATERIAL ]]ESCRIPTION 0,2128 0.87 USCS AASHTO 0 Filter Sand Pro~ec~ No.: G~-OG& PpoSect= Lot 41, T15N, R1W, Sec. 4 SP Remarks: · 'i It e~' $~nd o Loc~tion: $p~ing C~eek Pit ]]ate: 05/29/90 GRAIN SIZE ]]ISTRIBUTION TEST REPORT A-l-b GRAIN SIZE DISTRIBUTION TEST DATA Test No.: 2 Date: 05/29/90 Project No.: 89-086 Project: Lot 42, T15N, R1W, Sec. 4 =============================================================================== Sample Data Location of Sample: Sample Description: Filter Sand USOS Class: SP Liquid limit: 0 AASHTO Class: A-l-b Plasticity index: 0 Notes Remarks: Filter Sand Fig. No.: Mechanical Analysis Data Initial Dry sample and tare= 10!1.10 Tare = 272.10 Dry sample weight = 739.00 Tare for cumulative weight retained= 272.! Sieve 10 16 2O 40 60 !00 200 Cumu!. Wt. retained 388 90 511 O0 600 70 790 O0 914 !0 970 40 997 O0 finer 84.2 67.7 55.5 29.9 13.1 5.5 1.9 Fractional Components + 3 in. = 0.0 ~ GRAVEL = 0.0 ~ SAND = 98.1 FINES = 1.9 D85= 2.00 D60= 0.952 D50= 0.721 D30= 0.4198 D15= 0.26793 DIO= 0.21283 Cc = 0.8700 Ou = 4.4720 'tlamk taUS'! h,:,J.V~,:.l 4:i'{ .!,(:~!a~.t :',.?. C:c:)tlll].:'~.i'.~irfiE. l'F[..!=~:: Bc.?p'Lh 'Lc) 4Lop i (IN l=' I i::::E AND (:Jl;';:AV[~]. WILL [dZ~ZJIRE " , ......... o ADDITIONAL REQUIREMENTS: It is possible that the existing sand fill below the gravel can suffice as the 2 foot of native soil requirement above the groundwater table. An additional 2 foot layer of sand filter must be installed. Excavations left open overnight must be heated. The toe of the mound may come within 5 feet of the property line. A permenant groundwater monitoring tube must be installed to a minimum depth of 8 feet below ground level approximately half way between the mound and the creek. Ail material excavated from the existing subsurface disposal system must be removed and disposed of in an approved 80 ?8¸ ~0 20 10 0 200 100 10.0 1.0 0.1 0.01 0.001 8RAIN SlZ£ - mm %+75,. ~. GRAVEL ~'. SAND { Z GILT { Z CJ_R¥ 0.0 0,~ ~, 1 { i.9 0 PI 0 2.00 I 1)50 0o 72 0.420 0.2128 8.8? MATERIAL DESCRIPTION USCS AASHTO' Filter Stnd E~ A-l-b Project No.: 89-086 Ppoject: Lot 41, T15N, R1W, Sec. Loc~tton: Sp~tn9 Cpeek Pit 4 Remarks: ~' Filtep $~nd GRAIH SIZE DISTRI~UTIOH TEST REPORT GRAIN SIZE DISTRIBUTION TEST DATA Test No.: 2 Date: 05/29/90 PPo.~ect Ne.: 39-08~ Pro,ject: Lot Al, T15N. R1W, Sec. 4 Sample Data Location of Sample: Spring Creek Pit Sample Description: Filter Sand USCS Class: SP Liquid limit: 0 AASHTO Class: A-l-b Plasticity index: 0 Notes Remamks: Fi]ret Sand Fig. No.: 11 Mechanical Analysis Data Initial Dry sample and tare= 1011.10 Tare 272.10 Dry sample weight = 739.00 Tape fen cumulative weight retained= 272.1 Sieve Cumul. Wt. Percent retained ¢iner ~ 10 388.90 84.2 8 16 511.00 67.7 g 20 600.70 55.5 ~ 40 790.00 29.9 ~ 60 914.10 13.1 8 100 9?0.40 5.5 a 200 997.00 1.9 Fractional Components $ + 3 in. = 0.0 ~ GRAVEL = 0.0 % SAND 98. ~ fflNES = 1.9 085= 2.00 060= 0.952 050= 0.721 030= 0.4198 0!5= 0.26793 D10= 0.21283 Cc = 0.3700 Cu = 4.4720 Torn Fink, Mayor unicip lity of Anchor ¢ Department of Health and Human Services 825 "L" Street P.O. Box 196650 Anchorage, Alaska 99519-6650 February 15, 1989 Lou Butera, P.E. Eagle River Engineering Services P.O. Box 773294 Eagle River, Alaska 99516 Subject: Lot 42, Sec. 4, Tt5N, R3W Dear Mr. Butera: Based on our review of your recent permit application 8nd preliminary design for the subject lot, there appears to be several misunderstandings with respect to the guidelines provided in our November 1, 1989 letter. In this particular situation, you are proposing to construct a new mound system at the same location of an existing failed system. Since this type of installation is not routine, we believe that several precautions should be taken to ensure that the new system operates properly and in compliance with municipal code. We acknowledge that there may be several approaches to accomplishing a successful installation and we are receptive any alternative ideas or recommendations. In an effort to highlight our concerns and to clarify our previously established guidelines, we offer the following for your consideration: On October 11, 1989 this office conducted a field inspection of the subject property. A measurement made at the existing monitoring tube indicated top of gravel at 4 ft. 10 in. below ground level and depth to standing water at 4 ft. 5 in. below ground level. These measurements would appear to indicate that the system is in groundwater. "Kids Are Our Future" LOU Butera, P.E. February 15 1990 Page Two The as-built of the existing system indicates that the distribution piping within the bed is located 4 ft. 6 in. below ground level. The as-built further indicates that below the~distribution piping there is 6 in. of sewer rock followed by an 18 in. thick sand filter. Based on this information, it would appear that the total depth of the constructed system is approximately 6 ft. 6 in. below ground level. Your profile drawing indicates that the existing system is only 3 ft. below grade and that excavation and removal of contaminated material would only extend to this depth. This discrepancy needs to be resolved by either modifying your drawing to reflect as-built conditions or by field verifying that the as-built is in error and that the existing system only extends to a depth of 3 ft. Our previous recommendations regarding construction of the new system were based on the assumption that the total depth of excavation and removal of contaminated material would extend to a depth of 6 ft. 6 in. and that the ground water table is at an elevation of approximately 4 to 5 ft. below ground level. Our recommendations were also based on the requirements specified in the municipal code. AMC Section 15.65.060.3 requires that the bottom of an absorption field must be at least 4 ft. above seasonally high groundwater levels. AMC Section 15.65.077.A.1 requires that an elevated mound system be installed on a soil stratum of at least 2 ft. of unsaturated undisturbed native soil above seasonally saturated zones or bedrock. In meeting these requirements, a sand filter with the following characteristics must be installed: a. grainsize distribution meeting AMC 15.65.060.A.2.a b. sufficient thickness to provide a minimum 4 ft. vertical separation to seasonally high groundwater c. in place density of 85 - 95% In lieu of conducting field percolation and density tests, we will accept two grainsize analyses of the sand filter material. Lou Butera, P.E. February 15 1990 Page Three Our intent in requesting that a monitoring tube be installed adjacent to the proposed new mound is for the purpose of evaluating system performance and compliance with vertical separation requirements to groundwater. Given that the existing failed system had a useful life of less than ~ years, we think that periodic monitoring over 6 to 12 months of initial operation could provide some indication as to how successful the system is performing. We do not anticipate or recommend a long term monitoring program. If you have any questions please contact me at Sincerely,~ hn~Smith, P.E. Program Manager, On-site Services 343-4744· EAGLE RIVER ENGINEERING SERVICES Lou Butera, P.E. P.O. Box 773294 Eagle River, Alaska 99577 Telephone (907) 694-5195 January 22, 1990 Mr. John Smith, P.E. M.O.A./D.H.H.S 825 L Street Anchorage, AK 99501 Re: Lot 42, T15N, R1W, Sec.4 Dear Mr. Smith, We are applying for a permit to construct a septic system on the above referenced lot. Your letter dated 11/1/89, listed several of your concerns with our proposed design and I am asking for clarification of these concerns prior to permit issuance. What i' am concerned with is the requirement of a field percolation test of 5 - 60 minutes per inch requirement. From my technical literature, the graded sand filter material, in place and compacted to prevent settlement, will act to filter the wastewater after a biomat is formed on the filter surface requiring a maturity period. However, the result of a field perc test would be less than 5 min/lnch on a properly graded sand filter design. If sufficient silt is added to the mixture, I would be concerned with the potential for ~eachfie!d plugging at your required 95% compaction, I'n addition, the design and size of the leach area would have to be altered during construction if the percolation test showed greater than 5 min/inch. I~ the 95~ compaction ~equirement an arbitrary figure, and is in place compaction testing required on completed fill material? I am, therefore, ~equesting that our attached design be approved without a field percolatlon test requirement. In lieu of this; I would like to provide two gradation analysis on our filter sand layer material showing proper gradation and uniformity coefficients. I believe that this will satisfy the intent of the ordinance and will also result in an adequate system longevity. This is basically the procedure presently utilized in any bed system over a natural soil layer that percolates < 5min/inch. Attached os literature to support my statements. I would also question the requirement of a permanent ground water sampling point. Is my clients bed system to become the test grounds for all sand filters? I do not think the owners of this property would be willing to subject themselves to the risk of having to arbitrary shut down a leachfield based on unspecified ground water standards. There is also the possibility of residual contamination from the existing bed affecting test data. Mr. John Smith Page 2 If the Municipality does not consider the sand filter to be an adequate means of treatment, then monitoring should be required on all systems in very permiable soil layers with a sand filter. Thank you for your time and consideration. If you have any questions regarding this matter, please contact me at 694-5195. Sincerely, Louis A. Butera, N 89' Sg'W 3_...~0.00 ..4,,.___I ~ / ~ / xx~ OF CREEK ~ / % 2' TO 5' WIDE ~oo' b Iii~~ / ~ PON NEIGHBORING I / I X~//////~ t ," TEST HOLE N 89 58' 50 W 550.00 ~ -- · MONITOR TUBE N~HBORS WELL +100' ~ -- OL~NOUT NO KNOWN CURTAIN DRAINS sEP~C sY~ +~o' ~ WELL ~EMENT SEPTIC SITE PLAN LEGAL: LOT ~2 T15N, Rl W, SEC. 4 OWNER: H.U.D. PROPERTIES CONTRACTOR: N/A ~ _ /" ~ EACLE RIVER ENClNEER~' ~ERVICEX ¢,¢"¢~, ~ EAGLE RIVER, A~ 99577 ~ ~ (907) 694-5195 FAX: (907) 694-3297 Leachbed Profile RESEED W/ TOPSOIL ,~ E~fating Mounded . or¥.o~ 2' MINIMUM COVER graund / New Leechbed -{ Level L Ground Level Surrounding Leach Bed ,' .1'.' '.' '.* .' ".' ",' '' ' ' ' ' ' ' ' ' ' * * ', : ' ' ' ' ''.' ".' ".'''.' ';.'~'.' · . ** ** ** ** ..Remove to bottorn of ongmol leach.*~.**.****,*/ * . C'~'27'.-'.-~.'-.'.--~.'.---':~. rock and replace with 2' of sand "~:~.~-'~.~*~"~:" O~d I · ' .'.'',''-*'-''-' compacted to 85-95% denety '.''.'-'.''.'~-''.' Lecchfield-{ . 'j..' · . '... '... *. · . '. · . .~f-///~ ~,~./-/~ . ~:~.,(..~'~' ,Y' v,~'~'~';~c. '~-~ .' ' .~'............. ..'~.~.~.,~.,.......... .'..*..*..-..~T,~.::... 28"' Natura¢ Sell Rated (GW) ' ; Sand to be placed Ground Water Table Monitored must meet specifications S eve size % Passina #4 lOO #10 75-100 Vertical Scale 1" = 2' #so 5-~5 ~2oo o-15 CU -~ 4.0 · E.S. = ,25-1.0turn SEPTIC PLAN LEGAL: Lot 42 T15N, RlW, Sec, 4 OWNER: H.U.D. Properties CONTRACTOR: N/A ' . f -J-O~ ~ ~-~86JDATE,' 01/01/89J N./.S. A EACLE RZVER ENcZArEERINC SERVICES -P.O. Box 773294 EAGLE RIVER, AI~. 99577 (907) 694-5195 FAX: (907) 694-3297 SPECIFICATIONS FOR ON-SITE SEPTIC SYSTEM LEGAL: LOT 42, T15N, R1W, Sec.4 GENERAL The well and septic plan are for a single family residence only. The drawing and or site plan shall be a part of this specification. 3. All materials and workmanship shall meet the Anchorage Department of Health and State Department of Environmental Conservation requirements. 4. All soil tests are advisory to the design and are to be verified in the field by the engineer. 5. All excavations and depths are advisory and are to be verified or modified in the field by the contractor to meet Municipality of Anchorage, Department of Environmental Conservation requirements. It is the responsibility of the owner to obtain all necessary permits The excavation is to be exactly in the area shown on the site plan, any deviation requires engineer approval. It is always recommended that a surveyor locate the nearest lot line position and the location of any easements. EXISTING BED REMOVAL 1. The existing gravel ]eachbed is to be removed to the level at the bottom of the sewer gravel as designated by the engineer. This material is to be disposed of at the Municipal Landfill 'or decontaminated and properly buried. Estimate volume = 2? yards. SAND FILTER 1. A +2' sand filter layer is to be placed over the excavated bed area to provide +4' separation to ground water table. Sand fi]ten specifications are 'listed on profile drawing. Sand filter is to be placed in 1' lifts and compacted to prevent settlement. Sand filter material not meeting specifications will be subject to in place percolation testing. BED 1. The bottom of the bed shall be ]eve], plus or minus 1.5" 2. The new lift station is to replace the existing lift station that l~=~ supplies to the existing bed. 3. The bed gravel is to be covered with typar fabric material. 4. Soil or combination of soil and extruded board insulation to a depth of 4' or equivalent is to be placed over the leachfield. 5o The area over the bed is to be finish graded to prevent ponding of surface water runoff. As per drawing. 6. The septic tank and leachfield must not be closer, than 100' to any existing private well, 150' to any Class 'C" well, or 200 feet to any community well. RECOMMENDED LEACHFIELD DIMENSIONS TOTAL DEPTH = O' GRAVEL DEPTH = 6" BED LENGTH = 28' BED WIDTH= 24' Soil Rating : 85 Filter Bedroom Capacity = 3 Septic Tank Size = 1000 + Rating = 150 lift station ***NOTE: ***NOTE: ***NOTE: SAND FILTER REQUIRED DLJE TO PRESENCE OF GW LAYER. 500 GAL. ANCHORAGE TANK. LIFT STATION REQUIRED. WIRED TO M.O.A. CODE BY LICENSED ELECTRICIAN. °° allows for the aerobic decomposition of the wastewater. Temperature directly affects the rate of microbial growth, chemical reactions, adsorption mechanisms, and other factors that contribute to the stabilization of wastewater within the sand media. Proper selection of process design variables also affects the degree of purification of wastewater by intermittent filters. A brief discussion of those variables is presented below. 6.3,4.1 Media Size and Distribution The successful use of a granular material as a filtering media is depen- dent upon the proper choice of size and uniformity of the grains. Fil- ter media size and uniformity are expressed in terms of "effective size" and "uniformity coefficient." The' effective size is the size of the grain, in millimeters, such that 10% by weight are smaller. The unifor- mity coefficient is the ratio of the grain size that has 60% by weight finer than itself to the size which has 10% finer than itself. The ef- fective size of the granular media affects the quantity of wastewater that may be filtered, the rate of filtration, the penetration depth of particulate matter, and the quality of the filter effluent. Granular media that is too coarse lowers the retention time of the applied waste- water through the filter to a point where adequate biological decomposi- tion is not attained. ~oo~fi~ne ~_a~med.ita .li~i~ts_ the _quantity of waste, water tha~may_be successfully filtered, and will lead to early filter ~lOgging. This is due to the low hydraulic capacity and the existence ~f capillary saturation, characteristic of fine materials. Metcalf and Eddy (15) and Boyce (16) recommended that not more than 1% of the media should be finer than 0.13 mm. Many suggested values for the effective size and uniformity coefficient exist in the literature (10)(17)(18)(19) (20). gecommended f~,l~e~medta, effe~ive~s.ize~:range from-a minim~ o~.~ _O~2~5~m~p._~.~app~oxima-te]Y..- 1.,.5 mm.. Uniformity coefficients (UC) for intermittent filter media ~6rmally Should be I~S than 4.0.~ Granular media other than sand that have been used include anthracite, garnet, ilmenite, activated carbon, and mineral tailings. The media selected should be durable and insoluble in water. Total organic matter should be less than 1%, and total acid soluble matter should not exceed 3%. Any clay, loam, limestone, or organic material may increase the initial adsorption capacity of the sand, but may lead to a serious clogging condition as the filter ages. Shapes of individual media grains include round, oval, and angular con- figurations. Purification of wastewater infiltrating through granular media is dependent upon the adsorption and oxidation of organic matter in the wastewater. To a limiting extent, this is dependent on the shape 117 of the grain; however, it is more dependent on the size distribution of the grains, which is characterized by the U¢. The arrangement or placement of different sizes of grains throughout the filter bed is also an important design consideration. A homogeneous bed of one effective 'size media does not occur often due to construction practices and variations in local materials. In a bed having fine media layers placed above coarse layers, the downwar~attraction of wastewater ~ not as great due tO the lower a~ount of cohesion of the water in the larger pores (21). The coarse media will not draw the water out of the fine media, thereby causing the bottom layers of the fine material to remain saturated with water. This saturated zone acts as a water seal, limits oxidation, promotes clogging, and reduces the action of the fil- ter to a mere straining mechanism. ~:.uge~medi.~ with a UC of less than 4.0 minimizes this problem. The media arrangement of coarse over fine appears theoretically ~o be the most favorable, but it may be difficult to operate such a filter due to internal clogging throughout the filter. 6.3.4.2 Hydraulic Loading Rate The hydraulic loading rate may be defined as the volume of liquid ap- plied to the surface area of the sand filter over a designated length of time. Hydraulic loading is normally expressed as gpd/ft~, or cm/day. V~lues of recommended loading rates for intermittent sand filtration vary throughout the literature and depend upon the effective size of sand a~d the type of_ wastewater. They normally range from 0.75 to 15 gpd/ft~ (0.3 to 0.6 m3/~Z/d). 6.3.4.3 Organic Loading Rate The organic loading rate may be defined as the amount of soluble and insoluble organic matter applied per unit volume of filter bed over a designated length of time. Organic loading rates are not often reported in the literature. However, early investigators found that the perfor- mance of intermittent sand filters was dependent upon the accumulation of stable organic material in the filter bed {14)(21). To account for this, suggested hydraulic loading rates today are often given for a particular type of wastewater. Allowable loading rates increase with the degree of pretreatment. A strict relationship establishing an organic loading rate, however, has not yet been clearly defined in the literature. 118 6.3.4.4 Depth of Media Depths of intermittent sand filters were initially designed to be 4 to 10 feet; however, it was soon realized at the Lawrence Experimental Station (21) that ~ost_o~,_~he.~pu~fJ.ca~1_o~,~,wastewater occurredwithln t~he top.~o~12~in~. (23 to 30 cm) of the bed. Additional bed depth did no~rove the wastewater purification to any significant degree. Most media depths used today range from 24 to 42 in. (62 to 107 cm). The use of shallow filter beds helps to keep the cost of installation low. Deeper beds tend to produce a more constant effluent quality, are not affected as severely by rainfall or snow melt (22), and permit the removal of more media before media replacement becomes necessary. 6.3.4.5 Dosing Techniques and Frequency Dosing techniques refer to methods of application of wastewater to the intermittent sand filter. Jlajj~g.~ ~termittent filters is critical to t~he..perfomn)a~ce .q~ the P~oces~? Th6 '~{em must be designed to insure uniform distribution of wastewater throughout the filter cross-section. Sufficient resting' must also be provided between dosages to obtain aerobic conditions. In small filters, wastewater is applied in doses large enough to entirely flood the filter surface with at least 3 in. (8 cm) of water, thereby insuring adequate distribution. Dosing frequency is dependent upon media size, but should be greater with smaller doses for coarser media. Dosing methods that have been used include ridge and furrow application, drain tile distribution, surface flooding, and spray distribution meth- ods. Early sand filters for municipal wastewater were surface units that normally employed ridge and furrow or spray distribution methods. Intermittent filters in use today are often built below the ground sur- face and employ tile distribution. The frequency of dosing intermittent sand filters is open to considerable design judgement. Most of the earlier studies used a dosing frequency of 1/day. The Florida studies investigatged multiple dosings and concluded that the BOD removal efficiency of filters with media effective size greater than 0.45 mm is appreciably increased when the frequency of loading is increased beyond twice per day (23). This multiple dosing concept is successfully used in recirculating sand filter systems in Illinois (24), which employ a dosing frequency of once every 30 min. 119 121 TABLE 6-7 DESIGN CRITERIA FOR BURIED INTEP. MITTENT FILTERS Item Design Criteria Pretreatment Hydraul i c Loading A11 year Seasonal Me di a Material Effective size Unif. Coeff. Depth Underdrai ns Materi al Sl ope Bedding Venting Di str, i buti on Ma teri al Bedding Venting Dosing Minimum level - sedimentation (septic tank or equivalent) <1.0 gpd/ft2 <2.0 gpd/ft2 Washed durable granular material (less than 1 percent organic matter by weight) 0.50 to 1.00 mm <4.0 {<3.5 preferable) 24 to 36 inches Open joint or perforated pipe 0.5 to 1.0 percent Washed durable gravel or crushed stone {1/4 to 1-1/2 in.) Upstream end Open joint or perforated pipe Washed durable gravel or stone (3/4 to 2-1/2 in~) Downstream end Flood filter; frequency greater than 2 per day 124 equilibrium conditions are obtained. When filters are designed for facilities with seasonal occupation, hydraulic loading may be increased to 2.0 gpd/ft2 (0.08 m3/m2/d) since sufficient time will be available for drying and restoring the infiltrative surface of the bed. The effective size of media for subsurface filters ranges from 0.35 to 1.0 mm with a UC less than 4.0, and preferably less than 3.6. Finer media will tend to clog more readily, whereas coarser media may result in poorer distribution and will normally produce a lower effluent quality. Distribution and underdrains are normally perforated or open-joint pipe with a minimum 4-in. {lO-cm) diameter. The distribution and underdrain lines are surrounded by at least 8 in. of washed durable gravel or crushed stone. For distribution lines, the gravel or stone is usually smaller than 2-1/2 in. (6 cm) but larger than 3/4 in. (2 cm), whereas the size range of the gravel or stone for the underdrains is between 1- 1/2 to 1/4 in. {3.8 to 0.6 cm). Slopes of underdrain pipe range from 0.5 to 1%. With dosing, there would be no requirement for slopes on distribution piping. Proper dosing to the filter is critical to its successful performance. The dosing system is designed to flood the entire filter during the dos- ing cycle. A dosing frequency of greater than two times per day is rec- ommended. Details on design and construction of dosing chamber facili- ties appear in Chapter 8. 6.3.6.2 Free Access Filters (Non-Recirculating) Design criteria for free access filters are presented in Table 6-8. Hydraulic loading to these filters depends upon media size and waste- water chara~teristic~.oSeptic tank effluent may be applied at rates up to 5 gpd/ft (0.~ m~/m~/d), where~s a higher qualil~v pretreated waste- water may be applied at rates as high as 10 gal/d ft~ (40 cm/d). Selec- tion of hydraulic loading will also be influenced by desired filter run times (see Section 6.3.8). Higher acceptable loadings on these filters as compared to subsurface filters relates primarily to the accessibility of the filter surface for maintenance. Media characteristics and underdrain systems for free access filters are similar to those for subsurface filters. Distribution is often provided through pipelines and directed on splash plates located at the center or corners of the sand surface. Occasionally, troughs or spray nozzles are 125 6.3.8 Operation and Maintenance 6.3.8.1 General Intermittent sand filters require relatively little operational control or maintenance. Once wastewater is applied to the filter, it takes from a few days to two weeks before the sand has matured (2)(28). BOD and SS concentrations in the effluent will :~f~llY drop rapidly after maturation. Depending upon media, size, rate of application, and ambient temperature, ~..c~a%~qn~m~y take from 2 weeks up to 6 months to .d_develop. Winter start-u~~hj~]j~'66 ~v6ided since the biological growth on the filter media may not properly develop (14). As discussed above, clogging of the filter eventually occurs as the pore space between the media.grains begins to fill with inert and biological materials. Once hydraulic conductivity falls below the average hydrau- lic loading, permanent ponding occurs. Although effluent quality may not initially suffer, anaerobic conditions within the filter result in further rapid clogging and a cessation of nitrification. Application of wastewater to the filter should be discontinued when continuous ponding occurs at levels in excess of 12 in. (30 cm) above the sand surface. A high water alarm located 12 in. (30 cm) above the sand surface serves to notify the owner of a ponded condition. ince buried filters cannot be easil, y 'serviced, the media size is rmall lar e and hydraulic application rates are low {usually less i!~an 2 ~n./dg[5 cm/d]). Proper pretreatment maintenance is. of paramount !!importance. Free access filters, on the other hand, may be designed i ndi cates ~wlth finer media and at higher application rates. Experience ~ntermittent sand filters receiving septic t~.nk influent will clog ~'.that ' · .... ,- ~n --~ 150 days for effective s~zes of 0.2 mm .and_O..6 mm, respectively {2). Aerobically treated effluen, t can be appmieo a~ ln approxlm~bumy ~ ~,,~ . ~ the same rates for up to 12 months if suspended sol~ds are under 50 mg/1 {2)(23). Res'ults with reci-rculated filters using coarse media {1.0 - 1.5 mm) indicate filter runs in excess of one year (27). 6.3.8.2 Maintenance of Media Maintenance of the media includes both routine maintenance procedures and media regeneration upon clogging. These procedures apply to free access filters only. The effectiveness of routine raking of the media surface has not been clearly established, although employed in several studies (2)(14)(21)(24). Filters open to the air require weed removal as well. Cold weather maintenance of media may require different meth- ods of wastewater application, including ridge and furrow and continuous 136 flooding. These methods are designed to eliminate ice sheet develop- ment. Use of insulated covers permits trouble-free winter operation in areas with ambient temperatures as low as -40° F (2). Eventually~ filter clogging requires media regeneration. Raking of the surface will not in itself eliminate the need for more extensive reha- bilitation (2)(14). The removal of the top layer of sand, as well as replacement with clean sand when sand depths are depleted to less than 24 to 30 in. (61 to 76 cml, appears to be very effective for filters clogged primarily by a surface mat. This includes filters receiving aerobically treated effluent (2). In-depth clogging, however, often prevails in many intermittent filters requiring oxidation of the clog- ging materials. ~_Resting of the media for a eriod of ' ~e very effective'T ...... · . __ P.. t~me has proven to ~lPo~^. ~]~ ~ n. re~torlng ~lt~r hydraulic conductivit 2 - _~-.p:rux~ee ~real;men~ may a/so nrove ,n ~ ~ ...... ~_~ )'. ~Y surT~c~ent data are available on long-term application of th~s oxidizing agent. 6.3.8.3 Other Maintenance Requirements The successful operation of filters is dependent on proper maintenance of the pretreatment processes. The accumulation of scum, grease, and solid materials on the filter surface due to inadequate pretreatment results in premature filter failure. This is especially critical for buried filters. Grease traps, septic tanks, and other pretreatment processes should be routinely maintained in accordance with requirements listed in other sections of this manual. Dosing chambers, pumps, and siphons should receive periodic'maintenance checks as recommended in Chapter 8. If electronic sensing devices are employed to warn owners of filter ponding, these devices should also be periodically checked as well. 6.3.8.4 Summary The maintenance and operational requirements for buried, free access and ~ec~culating filters are summarized in Tables 6-10, 6-11, and 6-12. Kou~ne maintenance requirements have not been well documented for in- termittent filtration onsite, but visits should be made four times per year to check filters and their appurtenances. Based on a meager data base, unskilled manpower requirements for buried filter systems would be less than 2 man days per year for examination of dosing chamber and appurtenances and septic tank. Free access filters may require from 2 to 4 man days per year for media maintenance and replacement and examin- ation of dosing chamber, septic tank, and appurtenances. Additional .,137 Tom Fink, Mayor Municipality of Anchorage Department of Health and Human Services 825 "L" Street P.O, Box 196650 Anchorage, Alaska 99519-6650 343-4744 April 5, 1990 Lou Butera, P.E. Eagle River Engineering Services PO Box 773294 Eagle River, Alaska 99577 Subject: Waiver Request for T15N R1W Section 4 Lot 42 Waiver #WR8900047, Permit ~SW900066, PID ~051-072-39 Dear Mr. Butera: The request for a waiver of the 100 foot separation of a septic tank to a surface water has been approved. The approved horizontal separation distance is 90 feet. This waiver approval applies to the existing septic tank to surface water only. Any future upgrade to the septic tank will require all separation distances be met or another approval from this department. If 343-4744. Si ce ly, Robert W. Robinson Civil Engineer On-site Services there are any questions, please call this office at Program Manager On-site Services RWR/lm Tom Fink, Mayor ] un cip lity of Anchor ¢ Department of Health and Human Services 825 "L" Street P.O. Box 196650 Anchorage, Alaska 99519-6650 November 1, 1989 Lou Butera, P.E. Eagle River Engineering Services P.O. Box 773294 Eagle River, Alaska 99516 Subject: Lot 42, Sec. 4, T15N, R3W Dear Mr. Butera: Based on our field investigation and the information which you have provided this office, it is apparent that the existing wastewater disposal system encroaches on the required 4 Ft. vertical separation between the bottom of the absorption field and the seasonally high groundwater table. In your letter, dated October 2, 1989, you recommended that~ a replacement absorption field be installed directly over the existing failed absorption field. Based on our understanding of your proposal and the physical characteristics of the lot, we believe that it is possible to construct a new absorption field in the same location as the existing failed absorption field. The following guidelines should be used in preparing your design of the new absorption field: 1. The entire basal bed area of the existing absorption field must be excavated to its original depth and all contaminated material must be removed and disposed of in a proper manner. 2. AMC Section 15.65.060.3 requires that the bottom of an absorption field be at least 4 Ft. above seasonally high groundwater levels. AMC Section 15.65.077.A.1 requires that an elevated mound system be installed on a soil stratum of at least 2 feet of unsaturated undisturbed native soil above seasonally saturated horizons or bedrock. In order to "Kids Are Our Future" LOU Butera, P.E. 'November 1, 1989 Page Two satisfy these requirements, construction of a sand filter will be necessary to achieve the required vertical separation from groundwater. The bottom two feet of filter material must be placed and compacted to 95 percent maximum density and must be field verified to have a percolation rate between 5 and 60 minutes per inch. A monitoring tube must be installed adjacent to the absorption field which will facilitate sampling and testing of the effluent as it enters the groundwater. It is understood that issuance of a permit will be contingent upon review and approval of the final design documents. Since the existing wastewater disposal system is not in conformance with Alaska Department of Environmental Conservation regulations or municipal code, this office cannot proceed .with the issuance of the separation distance waiver which you have requested. We will review your waiver application in conjunction with your design submittal for upgrading the system. If you have any questions or concerns, please contact me at 343-4360. Sincerely, ~ ~ Program Manager, On-site Services EAGLE RIVEP uF;N ,I. t F ING SERVICES ::;17P 7 1989 P.o. Box 773294 Eagle River, Alaska 99577 r~ E C E I ~,~ ED Telephone (907) 694-5195 Mr. John Smith P.E. Department of Health & Human Services 825 "L" Street Anchorage, Ak 99502 RE: Lot 42 T15N R1W Sec. Dear Mr. Smith, On behalf of my client, H.U.D. properties, I am submitting the information necessary for your determination of a waiver of separation distance, septic tank to surface water, to 90' for the above referenced property. The septic system was installed in 1983 as shown on the attached report. The tank is located slightly up gradient (5%) of the pond and has an outlet depth of 4~'. As the tank was installed in 1983 I would assume that caulder type couplings where utilized. Soil in the area is a GW type down to a 5' water table depth. The pond was excavated in a small creek that according to file records was constructed with MOA approval to allow 100' distance to the leachbed. The pond is approximately 9' deep and discharges into the creek. The pond bottom is gravel. The owner would like to retain the pond for its aesthetic value and is hereby applying for this minor variation of separation. If you have any questions or any further concerns please call me at 694-5195. Sincerely, Louis Butera, P.E. attached: Site Plan Inspection Report oro~e Recordin~ ~lstrtc~ ~'~ e~cept es indicated here~' t~ is the responslbltit~ of the o~ner ~o determine ~he existence of easements, covenonts, or cirCUmstanCes sh~id lhe recorded subdivision plot. under no onv data here~ be used f~ consJruCti~ boundary or tence lineS. Date Drown by: >tat filin~ no: pr epored by A R~cHARL) p. HA~KINS REGtSTEREO PROFESSIONAL ,L. ANO suRVEYOR P.O. BOX 1105'EAGLE RtvER,AL. ASKA PH. 694.?..37i 99577 EAGLE RIVER ENGINEERING SERVICES  Lou Nutera, P.E. P.O. Box 779294 Eagle River, Alaska 99577 Telephone {997) 694-5195 October 2, 1989 Mr. Robbie Robinson Municipality of Anchorage 825 L Street Anchorage, Ak. 99501 RE: Lot 42, T15N, R1W, Sec. 4 MUNICIPALITY OF ANCHOP, A,GE DEPT. OF HEALTH & ENVIRONMENTAl. PROTECTION OCT 6 t989 RECEIVED Dear Mr. Robinson, At your request we have excavated ad3acent to the septic tank on the above referenced lot to determine additional information for waiver of tank to pond distance. The 'tank was found to be in good condition with caulder couplings on the inlet pipe and no indication of leakage or frost damage. The manhole lid was sealed with a ramneck gasket to provide additional protection. The water table level 10' distance from the tank was found to be at 4' This ground water level is 35" below the bottom of leachbed gravel elevation as determined through the monitoring tube. As this is less than 4' separation, I am recommending to H.U.D. that the leachfie!d be replaced. The only available replacement area is directly over the old leachbed, as the lot is surrounded by a creek on 3 sides. The old leachbed appears to be in good condition in 85 gravel and has not been in use for some time. Is it possible to excavate out the leach pipes etc., and place 2' of filter sand material over the old bed with a new leach bed over the sand layer? We still request the waiver to the old tank to pond distance. There is nothing in my inspection that indicated leakage or a structural problem with tank location. Please continue to process our waiver application. If you have any questions or any further concerns please call me at 694-5195. Sincerely, Louis Butera, P.E. ~? · .~ . , ~r~% MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION ENVIRONMENTAL ENGINEERING DIVISION 825 L Street - Anchorage, Alaska 99501 Telephone 264-4720 ON-SITE SEWAGE DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT NAME P~tONE ~AILING ADDRESS LEGAL DESCRIPTION LOCATION NO. OF BEDROOMS DISTANCE TO: ] /5 J ~ ~ Z Manufacturer Material No. of compartments ~ ~ Liq. capacity in gallons inside length Width Liquid depth O ~ ~ Manufacturer/~ Material Liquid capacity ]n gallons ~ Well 2 Foundation Nearest lot line PERMIT NO, ~,~ ~ No. of lines Length of each I Total length of lines Trench width Distance between lines ~ ~ ~ Top of tiJe to finish grade Material beneath tile Total effective absorption area ~ Type of crib Crib diameter Orib depth ~ ~ Total effective absorption are~ O~ ~ ~' Class ~2~..~~,.,:D~ler. ~ -~ ~~ Dista0cetolotline PERMITNO. ~ DISTANCE TO: Building~pdation Sewer lin~ ~ ~ ~ Septic tank( ~ ~ Absorption/(~area(s) OTHER PIPE MATERIALS INSTALLER · [ ~ )D lev. 3178) Legal Description: Type of Soil Absorption System Is: Trench: Drainfield: Maximum Number of Bedrooms: , ~_..M_uNICIPALITY Of ANCHORAGE.~-~ ' . ,1 Department! '~ Health and Environmenta~ '!rotection ~ · '', . 825 h' Street, Anchorage, AK. >9501 ' ~ ~ * * * HANDWRITTEN PERMIT * * * Permit ~~ WELL AND/OR 0N-SITE SEWER PERMIT Mailing Addres · D~ Applic~t: ~__ s. Location: ~ F %[ 1~ ~ ~O~D Phone Nu~er: ~%~-O%05 Seepage Bed: Holding Tank quired Size of LENGTH DEPTH Soil Rating(sq.ft/br) the Soil orption system GRAVEL DEPTH ' WIDTH The length dimension is the length(in feet) of the trench or drainfield. The depth of a trench or pit is the distance between the surface of the ground and the bottom of the excavation(in feet). There is no set width for trenches. The gravel depth is the minimum depth of gravel between the outfall pipe and the bottom of the excavation(in feet). * * REQUIRED SEPTIC(HOLDING) TANK SIZE = ~'~-~ GALLONS Permit applicant has the responsibility to inform this department during the installation inspections of any wells adjacent to this property and the number of residences that the well will serve. * * * TWO(2) INSPECTIONS ARE REQUIRED * * * Backfilling of any system without final inspection and approval by this department will be subject to prosecution. Minimum distance between a well and any on-site sewage disposal system is 100 feet for a private well or 150 to 200 feet from a public well depending upon the type of public well. Minimum distance from a private well to a private sewer line is 25 feet and to a cor~munity sewer line is 75 feet. Well logs are required and must be returned to this department within 30 days of the well completion. Other requirements may apply. Specifications and construction diagrams are available to insure proper installation. * * * PERMIT EXPIRES DECEMBER 31; 1 9 8 3 * * * I certify that: (1) I am familiar with the requirements for on-site sewers and wells as set forth by the Municipality of Anchorage. (2) I will install the system in accordance with codes. (3) I understand that the on-site sewer system may require enlargement if the residence is remodeled to include more that 3 bedrooms. ALASKA ,iUIROFImE FITAL COIqTROL $1 l dlCl $, IF1C. SPECIFICATIONS FOR ELEVATED BED ALTERNATIVE WASTEWATER TREATMENT SYSTEM- LOT 42, SECTION 4, T15N R1W 1.0 GENERAL 1.1 THE DRAWINGS, SHEETS 1 THRU 5, SMALL BE A PART OF THIS SPECIFICATION. 1.2 ALL MATERIALS AND WORKMANSHIP SHALL MEET THE REQUIREMENTS OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION PERMIT. 1.3 ALL EXCAVATIONS AND DEPTHS ARE ADVISORY AND ARE TO BE VERIFIED OR MODIFIED IN THE FIELD BY THE ENGINEER. 1.4 IT IS THE RESPONSIBILITY OF THE OWNER TO OBTAIN ALL NECESSARY PERMITS OR EASEMENTS. A) BED WILL BE 5 FT. FROM PROPERTY LINE NOT 10 FT. B) TO POSITION SEPTIC SYSTEM ON LOT REQUIRES THE REROUTING OF STREAM AND WAIVER TO THAT EFFECT. 2.0 THE LIFT STATION 2.1 THE STOCK MATERIAL FOR THE LIFT STATION SHALL BE EITHER GALVANIZED STEEL (ASTM A-4444-76), OR ALUMINUM CULVERT, CAPABLE OF BURIAL TO 10 FT. 2.2 THE 24" PIPE FOR THE LIFT STATION SMALL MAVE A WELDED WATER TIGHT BOTTOM OF THE SAME THICKNESS AND COMPOSITION AS THE CULVERT. 2.3 ALL PENETRATIONS OF THE LIFT STATION SHALL BE WELDED AND WATER TIGHT. ALL WELDS SHALL BE CLEANED OF SLAG. WELDS ON GALVANIZED STEEL WILL BE SPRAYED WITH ZINC RICH PAINT OR COATED WITH BITUMASTIC. THE BOTTOM 2' OF THE INTERIOR SHALL BE COATED WITH BITUMASTIC PAINT. 2.4 THE TOP CAP SMALL BE RAIN TIGHT AND SECURELY FASTENED WITH SCREWS. 2.5 ALL ELECTRICAL FITTINGS AND CONNECTIONS IN THE LIFT STATION SMALL MEET THE REQUIREMENTS FOR A WATER TIGHT SERVICE. 2.6 THERE SMALL BE A HIGH LEVEL ALARM SET AT THE LEVEL OF THE SOIL PIPE FROM THE SEPTIC TANK. THE BUZZER SHALL BE LOCATED NEAR THE ELECTRICAL CONTROL PANEL OR IN A LOCATION DESIGNATED BY THE HOMEOWNER. 2.7 THE SUMP PUMP SMALL BE CAPABLE OF DELIVERING 10 GPM AT A HEAD OF 20 FEET. 2.8 THE SUMP PUMP SMALL BE SUSPENDED NOT LESS THAN 6 INCHES OFF THE BOTTOM OF THE LIFT STATION WITH A CMAIN OR NYLON LINE. 3.0 SEEPAGE BED 3.1 THE GRAVEL FOR THE BED SHALL BE SCREENED TO THE SIZES INDICATED. 3.2 THE SAND SMALL MAVE AN EFFECTIVE SIZE OF 0.4 TO 0.6 MM AND A UNIFORMITY COEFFICIENT OF NOT MORE THAN 4. 3.3 THE BERM AROUND THE SEEPAGE BED SHALL BE CONSTRUCTED OF IMPERMEABLE MATERIAL, AND ON A SLOPE OF 1 FOOT VERTICAL PER 2.5 FOOT HORIZONTAL. 3.4 THE BOTTOM OF THE EXCAVATION SHALL BE RAKED WITH THE BACKHOE BLADE TO INSURE THAT THE BOTTOM MAS NOT BEEN COMPACTED DURING EXCAVATION. THE BOTTOM ELEVATION SHALL BE PLUS OR MINUS 2". 1200 [[Jest 33rd Avenue, Svil¢ ~ · Anehor(l§¢, Alaska 99503 · {907) 276 1361 3.5 IF INSULATION IS REQUIRED THE INSULATION SHALL BE DOW EXTRUDED BLUE STYROFOAM INSULATION BOARD OF THE THICKNESS SHOWN ON THE DRAWINGS. 3,6 THE TOP AND SIDES OF THE BED SHALL BE PLANTED WITH A WHITE CLOVER AND RED FESCUE MIX. 3.7 THE SEPTIC TANK OR BED MUST NOT BE CLOSER THAN 100 FEET FROM THE CREEK. BY .......................... DATE ............... SUBJECT ......................................................................... ALASKA ENVIRON ~.E~TAL · ,, CONTROL SERVIC /INC. ].220 West 25th Avenue Suite H ANCHORAGE, ALASKA 99503 276-1361 279-2917 CALCULATED BY. DATE CHECKED BY. DATE SCALE i · i : i i :, "'"'i ~' b'~ '~:"' !i ilz .i!.....i i ..i..... ~ -~ ' } '" ""} :,i"" } ~. ~ "'~'""i" ~ ..~... ~ .~....;~ ~ _. ALASKA ENVIRONMENTAL ,,. CONTROL SERVI0~-~INC. 122o west 2§th Avenu~ Suite B ANCHORAGE, ALASKA 99503 276-1361 279-29:17 'LIF~ SHEET NO. CALCULATED BY DATE CHECKED BY DATE SCALE ALASKA ENVIRONMENTAL CONTROL SERVICF~'qNC. 1220 West 25th At ~e ANCHORAGE. ALASKA 99503 Phone 276.136! CHECKED BY DATE i ii::: NOTES 1URETHANE FOAM SHOULD BE APPLIED TO A DEPTH OF 4 FEET · BELOW GROUND SURFACE AT A THICKNESS OF I INCH, 2,iCOAT BOTT.OH 2 FEET~ INSIDE .WITH BITUHASTIC PAINT. 3,: USE ]~/4"' OR ]~'FLEX BLE HOSE TO FIT PUMP. 4._ S.EB $PECI, FICATIONSFOR HATERIAL5. ' ·LIFT STATION : ....... ~.,~,,~ ; :GROUND~ X~ ::' ~ N~EHA4 BO · ; : ' ~ "'FILLET ~E'LD ..... : ~,.~ ALL ~OU~ .... ~"! ~ ~u~ ~o~sa F "'~"' ~'' : : I ~' ~ '.~'~ I i*t~9~ ,'~ ALL AROUND I ~i~'..~ _;;[h~ ~ METAL PL~IE .METAL CAP WITH J 2"URETHANE FOAM :,FI. LLET WELD .yALL AROUND "'(To 4"COUPLING L1 I,~'/N PT NIPPLE ~ ./'~ ivlUNICIPALITY OF ANCHORAGE [] PERCOLATION "~--?"~, ' DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTIO.._N ,, TEST LEGAL DESCRIPTION: ~-' (FEET) 1 2 8 9 10 11- 12- SLOPE IF YES, AT WHAT DEPTH? SITE PLAN Gros~ Net Depth [o Reading Date Time Time Watee Drop PERCOLATION RATE _ {minutes/inch) TEST RUN BETWEEN . FT AND ____---. F pERFOHM~U~ : F''~I ' · ' , .... SOILS LOG [] PERCOLATION TEST LEGAL DESCRIPTION: ~-' 5- 6~ ? 8 9- 10- 11- 12- 13- 14- 15- 16- 17- 18- 19- 20- SLOPE SITE PLAN WAS GROUNO WATER y~*' ~ ENCOUNTERED? ~/ Op IF YES, AT WHAT ~ E DEPTH? Gross Net Depth to Net Reading Date Time Time Water Drop (chert A, NO, 1457-E · PERCOLATION RATE (minutes/inch) TEST RUN BETWEEN , FT AND , FT COMMENTS ~ ~ J ~ATER WELL RECORD STATE OF ALASKA DEPARTMENT OF NATURAL RESOURES Division of GeologicDI 81 Geophysicol Surveys Drilling Permit No. LOCATION OF WELL (Please complete either le, lb or lc.) A.D.L. NO. ( :J rd_ __of__of__of-- · ~{.~ SE} ~- W[~ Ic~.JDISTANCE ANO DIRECTION FROM ROAO INTERSECTIONS 3. OWNER OF WELL: Ad6ress: Surface ~.{) ft. ~ -- ~:¥'~ ]?i ~:.[~:/ ~ :~/~, ~':' :'¥~!;J '~: '~{~ 7. USg?~Domestic ~ Public Supply ~ Test Well ~ Other: ~o. s~z~c w~..~w~: .. / / ~ Above or ~ Below lend *urface Malerlal: ~ Neat Cement~ther:,. ~ S.b~. ~ Jet ~ Centrific.[ ~ Other Signed: ~ ~: ,~'~.~' z~:~-'~*;'~/'~ /J : '~ ~::;'~;' f'~ ~'>~ BILL SHEFFIELD, GOVERNOR March 16, 1983 [] 437 E. STREET SECOND FLOOR ANCHORAGE, ALAS[<A 98501 (807) 274.2833 P.O, BOX 615 KODIAK, ALASKA 99818 (807} 488-3350 P.O. BOX 1207 SOLDOTNA, ALASKA 98669 (907) 282-5210 P~O. BOX 1709 VALDEZ, ALASKA 99686 (907) 855~98 P,O. BOX 1064 WASILL~, ALASKA 99687 (907} 375-5038 Mr. Jerry F. Yoo 2221Muldoon Road, #20 Anchorage, Alaska 99504 RE: Unnamed stream tributary to Peters Creek Dear Mr. Yoo: In response to your comments and request, we have no objection to your plan to rechannel the above creek. We understand that it may by intermittent in nature, does not contain fish and has something like a 1/2 x I foot depth and width dimension. As advised, our concern is that excessive sedimentation from the rechannelization not occur, at least enough to violate Peters Creek water quality, reference 18 AAC 70.020 of the Water Quality Standards. To prevent an adverse impact on Peters Creek I recommend that you excavate your alternate channel first, leaving an earthen plug at the Peters Creek and upstream end. First remove the Peters Creek end plug of the new channel and next the plug between this channel and the exist- ing channel. The final steps will be to plug the existing stream where the new channel begins and secondly where it previously discharged into Peters Creek. The last stage will consist of filling in the old channel. I see no problem particulary if the soil is primarily gravel, as you described. Should you have any question or problems please do not hesitate to call or write. Sy~vi o ~/. Cyr EnVironmental Field Officer SJC/mr PO~. vH 6-650 ANCltORAGE, ALASKA 99502-0650 (907) 264-4111 TONY I<NOWI ES MA YOR DEPARIMENTOF HEALTH AND ENVIRONMENTAL PROTECTION March 16, 1983 Jerry+~i~oO % Alaska Environmental Control Services 1200 West 33 Avenue, Suite B Anchorage, Alaska 99503 Subject: T15N R1W Section 4 Lot 42 Elevated Bed System Your recent memo outlined the designs, specifications and procedures for an elevated mound bed wastewater disposal system proposed on the above property. The elevated system and lift station are well designed and certainly meet with our approval.. This will serve as our letter of intent to issue a permit for on-site sewage disposal system. There are several conditions, however, that this office would require, namely: (1) p o a e t m i t t c . (2) Provide this office with a topography map of the subject lot and the general vicinity. ~%~ (3) Provide this office with information on any adjacent or. nearby residence, wells, septic tanks and drainfields.~\ (4) Would require a thirty(30) day stabilized groundwater monitor test after the diversion of the creeks and prior to the construction of the proposed bed system. (5) (6) Provide this office with the proposed ~ocation of the water supply well on the subject lot. ~%%~ %-%~'~'~ Provide additional information on the origin and outfall of the "underground stream" shown on the upper left ha~d corner of Sheet 1 of 5 attached to your memo.~%[~x~ Jerry Hill March 16, 1983 Page Two We can foreseeno problems in granting the variance of five(5) feet setback from the lot line provided there are no limiting conditions shown in #3 above. Should you require any additional information or have further questions, please call this office at 264-4720. Sincerely, Robby Robinson Environmental Engineering Program Manager RWR/ljw POUCH 7-005 March 11, 1983 Jerry Yoo 222I Muldoon Road # 20 Anchorage, Alaska 99504 Re: Letter of Non-objection Dear Mr. Yoo: As per our conversation this date the Division of Land and Water Management has no objection to your diversion of that spring stream which passes through your property, Lot 42, Section 4, Township i5 North, Range 1 West, Seward Meridian. This letter does not relieve you of the responsibility of checking with Fish & Game or Department of Environmental Conservation regarding their regulations. Sincerely, Meg Hayes District Manager By: Bill Wright Assistant Engineer March 11, 1983 BILL SHEFFIELD, GOVERNOR Mr. Jerry Yoo 2221Muldoon Road #20 Anchorage, Alaska 99504 Dear Mr. Yoo: Re: Spring Drainage - Lot 42, Section 4, T. 15 N., R. 1 W., S.M. As per our conversation of 11 March 1983 the spring tributary to Peters Creek at the referenced location is not known to contain fish. Therefore no permit is required from the Alaska Department of Fish and Game to reroute the spring on your property. We recommend that you contact the Alaska Department of Conservation regard- ing their permitting requirements. Sincerely, Don W. Collinsworth, Commissioner o.2 BY: Donald O. McKay Habitat Biologist Habitat Division Telephone 344-0541 MUNICIPALITY O F ANCHORAGE Department of Health & Human Services DIVISION OF ENVIRONMENTAL SERVICES 343-4744 Parcel I.D. # CERTIFICATE OF INSPECTION FOR HEALTH AUTHORITY APPROVAL OF ON-S TE SEWER AND WATER FACILITY FOR SINGLE FAMILY DWELLING 1. GENERAL INFORMATION (Must be completed prior to submittal) (a) Legal Description (include lot, block, subdivision, section, townshi p, range) Lot 42, T15N, R1W, Sec. 4 Location (address or directions) NHN Hellava Road (b) Property owner Secretary of HUD Telephone: (home) N/A Business563-3333 Mailing Address 640 W. 3'6th Ave., Suite 1, Anchorage, Ak. 99503 (c) Lending Institution Mailing Address N/A Telephone N/A (d) Real Estate Corn pany and Agent Address ' ' Telepnone (e) Vlail the HAA to the following address: (or check here ID, if hold for pick up%) List contact person and day phone number below: .-. Pickup by the Engineer. ~"~' ' 2. TYPE OF RESIDENCE · ' -- ' · Single-Family ~ Number of bedrooms 3 3. WATER SUPPLY ndividual Well ~ Community [] Public [] Note:,., f.com unit rWell systei31i, must, h~ve.written,.c0nfir~atio,.o..f, r0m the Stat"e Depart~l~en.t of Envi,ron~en;ta!;; "COhsei'v/]'tibh"~tte~tihg t6 tH'leg'alit~, and'staTus, t ' ...... 4. SEW.'~GE DISPOSAL ..~. < ........ -.. -,.,, :- .... _ ............ ~ On~site~, -- Public [] ': 'Community [] *:': ;' Holding Tank · n t we s Stem ·must have wr tten conf rmat on from the State Oepartmen~of. EuV~,r,?n.~?.m,I- Note f commu y y .. . . Conservation attestlngto thb legailty and status. 72-025 :Rev. 7/88) Page 1 Of 2 :HJOM %J(~)U!~U9 leUO!SSeJ, oJd eq~. u! SUO!SS!LUO JO sJoJJe JoJ elq!suodseJ lou s! eB~Joqouv jo Xi!l~d!o!u nlAI eqJ. 'pensq s! eleo!J.!l.J@o 'e eJoJ. eq e~.ep ez,q'eue Jo suop, oedsu! lonpuoo lou op SHHC] j.o see,~oldL.u3 's~.UeLUeJ!nbeJ e~.'els pue leJepe~, u!e:Ueo XJ.s!l~es o~. Jep.~o u! suo!lnl!l, su! 6u!puel J!eq~. pue seuJoq J.o sJeseqoJnd o~..~sel. Jnoo e se s!q:l seop SHHQ eq/ 'eNs'elV J.o elelS eql u! Jeeu!l~ue leUO!SSajoJd luapuedepu! ue/~q eAoq~ B qd~Jl~e,md u! u@^!15 suo!lmueseJdeJ eq~. uodn/~lUO pes~q p@l.~o!J.!Jeo leAoJddv .~l!Joqlnv q~.lBeH senss! (SHHQ) seo!^Je$ ueuJnN pu~ q~.leeH J.o ~.uemlJ~dea eb'eJoqouv j.o ,~1.!led!o!u n ~ A. WEL~ATA : Well Classification MUNICIPALITY OF ANCHORAGE (MOA) Health Authority Approval (HAA) CHECKLIST - FEBRUARY 1984 343-4744 Legal Description: Well Log Present (Y/N) /V Date Completed ' ~- ,~- "' ,~3 Yield Total Depth ~ ~' · Cased.t.o ~o / Depth of Grouting ~",/.~ Static Water Level ,4, ¢~.~,,,',-, ¢- / / Pump Set At ~ Casing Height Above Ground ~ .2. ''/ Sanitary Seal on Casing (Y/N) Electrical Wiring in Conduit (Y/N) /v Depression Around Wellhead (Y/N) SEPARATION DISTANCES FROM WELL: To Septic/Holding Tank on Lot /'¢'zZ ; On Adjoining Lots To Nearest Edge of Absorption Field on Lot /"~'" ; On Adjoining Lots To Nearest Public Sewer Line '"""/~ To Nearest Public Sewer Cleanout/Manhole To Nearest Sewer Service Line on Lot '~g' / Water Sample Collected by ~",~-,,,-.,~.c ,- ; Date ~/~,,/x~ Water Sample Test Results ~'.,/,~,.... .~ ~¢ /¢// /-,.-,~.¢¢_ ., 4:~,;~ If A, B, C, D.E.C. Approved (Y/N) ~',¢ ¢~,.~ Comments B. SEPTIC/HOLDING TANK DATA' Date Installed /~)£3 Size /~-'¢ Standpipes (Y/N) ,)" Air-tight Caps (Y/N) Depression over Tank (Y/N) ,,v' Pumping/Maintenance Contact on File (Y/N) To Water-Supply Well /~ / To Property Line To Water Main/Service Line No. of Compartments ,Y Foundation Cleanout (Y/N) Date Last Pumped ~//'87 ; for '~/'~ Holding Tank High-Water Alarm (Y/N) SEPARATION DISTANCES FROM SEPTIC/HOLDING TANK: To Building Foundation To Disposal Field /-5~ / To Stream, Pond, Lake or Major Drainage Course Temporary Holding Tank Permit (Y/N) '~'/'~ /.7 / Comments 72-028 (Rev. 7/88) Front Page 1 of 2 C. ABSORPTION FIELD DATA Soils Rating in Absorption Strata Date Installed /P ,~ Width of Field ,2-~, / Square Feet of Absortion Area Depression over Field (Y/N) ,'~ Results of Last Adequacy Test .'~'~ Type of System Design Length of Field ~'P' / Depth of Field Gravel Bed Thickness Statndpipes Present (Y/N) Date of Last Adequacy Test SEPARATION DISTANCE FROM ABSORPTION FIELD: To Water-Supply Well / To Building Foundation · '~ ~'/ Lot To Water Main/Service Line r~,*" To Stream, Pond, Lake, or Major Drainage Course To Driveway, Parking Area, or Vehicle Storage Area Comments To Property Line /'~ / To Existing or Abandoned System on ; On Adjoining Lots f' ~' ' To Cutback (if present) D. LIFT STATION Date Installed Size in Gallons "Pump On" Level at ~' '/ High Water Alarm Level at Tested for .,.~,'/,4, Meets MOA Electrical Codes (Y/N) Comments Dimensions --.~'~'¢ ,.~'~/"¢"' Manhole/Access (Y/N) "Pump Off" Level at Vent (Y/N) Pumping Cycles during Adequacy Test. - /--¢/'~ ~ .¢'", **Check Permitted Bedroom Rating Against HAA Request** I certify that I have checked, verified, or conformed to all MOA and HAA guidelines in ef,feo, t*om;t,b,e date of this inspection. ,,~;;.; L'~ /',.~' . .,. Signed ~~ '~" ~' ' ' '"' Company ~'C/--~-F ~*,'.~ ,, · ' Date MOA ReceiptNo, ~_o'~(~ ¢:,~7.~~ 'z, (~-_~,~.~, ~ ReceiptNo, Date of Payment 7 --'~ '-~ ¢'''} Waiver Fee: $ Amount: $ / ? ~-.~,---~'2(' ) Date of Payment 72 026 (Rev. 7/88) Back Page 2 of 2 .3eaJ ' 3UH 27 :90 0~£E, HTL-.-filHCHORfi~GE 907 ~'Td 9E,45 P.4/5 NORTHERN~a~"'~"'""~ ~1~ LABORATORIES, . Eagle PO. Box Attn: r,~oui.~ Butera R~port Date: 06/27/90 Date Arrived: 06/21/90 Date Sampled: 06/21/90 Time Sampled; 1~00 collected By: ~/~H B~_dow D~te~:t4<;n Limit bi, ~t. ed in Result Be~oW .Requ!c~tory Min, Above Regalatory Max. B~ow D~t~utlon Limit Allchorage OpcratLons Manager ¸1. MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION DIVISION OF ENVIRONMENTAL HEALTH CERTIFICATE OF INSPECTION FOR HEALTH AUTHORITY APPROVAL OF ON-SITE SEWER AND WATER FACILITY 264-4720 Application Date GENERAL INFORMATION (a) Legal Description (include lot, block, subdivision, section, township, range) Location (address or directions) (b) Applicant Name ..~¢.~-v'Z~.~ V~ ~J.~.~ Telephone: Home . Applicant Address "~-0, '"~ ~"~ t~ 0 "~-~J,- 5 ~--d~.~, ~.. I'~ Business (c) Applicant is (check one): Lending Institution []; Owner/builder []; Buyer []; Other [] (explain); (d) Lending Institution Address (e) Real Estate Company and Agent Address Telephone Telephone (f) Mail the ~I~¢S~NI~R~ER~fI'~J address: 17034 Eagle Ri~er Loop Road No. 204 Eagle River~ AlasKa ¥~/J TYPE OF RESIDENCE Single-Family I~ Multi-Family [] Number of Bedrooms '~ Other WATER SUPPLY , · Individual Well'~ Community [] Public [] ; " Note: If community well system, must have written confirmation from the State Department of Environmental Conservation attesting to the legality and status. 4. SEWAGE DISPOSAL Onsite~ Public [] Community [] Holding Tank [] Note: If community well system, must have written confirmation from the State Department of Environmental Conservation attesting to the legality and status. Page 1 of 2 72-025 (11~84) ENGINEERING FIRM PROVIDIN NSPECTIONS, TESTS, FILE SEARCH, D.~r~.'AND INFORMATION As certified by my seal affixed hereto and as of the validation date shown below, I verify that my investigation of this Hea~th Authority Approval shows that the on-site water supply and/or wastewater disposal system is safe, functional and adequate for the number of bedrooms and type of structure indicated herein. I further verify that based on the information obtained from the Municipality of Anchorage flies and from my investigation and inspection, the on-site water supply and/or wastewater disposal system is in compliance with all Municipal and State codes, ordinances, and regulations in effect on the date of this insp_ection. S & S ENGINEERING ~ ~'~-~ --~__~. Name of Firm 170~ ~._j~ ,,_.__, .... Telephone Address Eagle River, Alaska Date DHEP APPROVAL Approved for '~'~e~bedreoms bY ~d---_~ ~. "~.~,~ Conditional Approved Disapproved Terms of Conditional Approval Date CAUTION The Muncipality of Anchorage Depar[ment of Health and Environmental Protection (DHEP) issues Health Authority Approval certificates based solely upon the representations given in paragraph 5 above by an independent professional engineer registered in the State of Alaska. The DHEP does this as a courtesy to purchasers of homes and their lending institutions in order to satisfy certain federal and state requirements. Employees of DHEP do not conduct inspections or analyze data before a certificate is issued. The Municipality of Anchorage is not responsible for errors or omissions in the professional engineer's work. Page 2 of 2 72-025 (11/84) WELL DATA 'r?O .~,=~o~ClPALITY OF ANCHORAGE (MO~q · O~ h~.%~)~'a~ALTH AUTHORITY APPROVAL (.AA) ~C~~ CHECKLIST - FEBRUARY 1984 ~ -n~ 264-4720 ~ ' Legal Description' L~ ~/~.~,21Vvz ~. Y ,.~, ~ If A, B, C, D.E.C. Approved (Y/N) Date Completed Cased to /~- ' Well Classification Well Log Present ~N) Total Depth Static Water Level Casing Height Above Ground Electrical Wiring in Conduit ~;~N) Separation Distances from Well: To Septic/Holding Tank on Lot To Nearest Edge of Absorption Field on Lot To Nearest Public Sewer Line /"'///,~z Cleanout/Manhole Depth of Grouting Pump Set At Sanitary Seal on Casing (~N) Depression Around Wellhead (Y/I~ Water Sample Collected by ,-~ ~ ~.~ -L.~L~,~.~.I,,'-/~ ; Date Water Sample Test Results Comments X,',//.~.~. )//~c,~ /~,~' ; On Adjoining Lots to¢/'¢' ; On Adjoining Lots /oc, To Nearest Public Sewer To Nearest Sewer Service Line on Lot ~---~ B. SEPTIC/HOLDING TANK DATA Date Installed ~ Size ~ No. of Compartments ~-' Standpipes~(~N) Air-tight Caps ~1) Foundation Cleanout (~N) Depression over Tank (Y/~[~ Date Last Pumped ~/,~'/-~ Pumping/Maintenance Contract on File (Y/N) Holding Tank High-Water Alarm (Y/N) Separation Distances from Septic/Holding Tank: To Water-Supply Well To Property Line To Water Main/Service Line Course ; for Temporary Holding Tank Permit (Y/N) To Building Foundation / ~'/ To Disposal Field ! ,-~/ To Stream; POnd, Lake, or Major Drainage Comments Page I of 2 72-026(11/84} C. ABSORPTION FIELD DATA Soils Rating in Absorption Strata /~,o ~2~/,.~.~.. Date Installed ~,/~ ,?/~ ~.. Width of Field __ ~c¢ ! Square Feet of Absorption Area Depression over Field (Y,~ Results of Last Adequacy Test Type of System Design Separation Distance from Absorption Field: To Water-Supply Well To Building Foundation Lot To Water Main/Service Line To Stream/Pond/Lake/or Major Drainage Course To Driveway, Parking Area, or Vehicle Storage Area Length of Field Depth of. Field Gravel Bed Thickness ~'o- Standpipes Present C/N) Date of Last Adequacy Test To Property Line /~ / To Existing or Abandoned System on ; On Adjoining Lots To Cutbank (if present) Comments D. LIFT S'rATION ~ ~ Date Installed 7~ ~- ~e3.% Dimensions ~/.~ X Size in Gallons ~ L~O Manhole/Access ~N) "Pump On" Level at ~ I. ~ "Pump Off" Level at High Water Alarm Level at ~ ~na~¢~ ~T~/~ CF ~c~r ~nt (~ Tested for /-~ ~V~¢% ~ ~m Pumping Cycles during Adequacy Test. Meets MOA Electrical Codes (Y/N) ~ ~/m¢~¢¢ /~ %~1~ ~, Comments ~ ~~ ~ ~~ ~ ~ ** Check Permitted Bedroom Rating Against HAA Request ** I certify that I have checked, verified, or conformed to all MOA and HAA guidelines in effect on the date of this inspection. Signed Date ~ S & S ENGINEERING ,~,", ~ '~.. Come__Ce ~tv~~~: ~A No. ~ ~¢ ~ ........ R E~gl~ Rlver~ Alaska g95~7 / ece~p[-i~o. ~~_oo ~ Date of Payment ~[ ~ / %~ Amount: $ (~ ~ Page 2 of 2 72-026 (11184) FOLD Subject: Lot 42; S~ction 4; TI5N; RIW Lift station alarm inSt~atiOn and lift ~tation pump on-off level adjustment To: Steve Morris Municipality of Anchorage Department of Health and Human Services MESSAGE ROBERT A. SHAFER, P.E. 694'2979 HEALTH AUTHORITY APPROVALS EXCAVATING I CIVIL ENGINEERING WORK ARRANGED / ADEQUACY TESTS I SOIL TESTS WATER & SEWER LINES & MAIN EXT. ON SITE INSPECTIONS DATEOFMESSAGE FeSruar~ 16, SIGNATURE OF ORIGINATOR TITLE OF ORIGINATOR Engineer I 9 871 ROUTING SYMBOL FOLD Th~ alarm was installed inside th~ house, The alarm float was ~5o installed and the system was tested. The alarm level ~ roughly 61" down. The pump off level remained at 87" down. The new pump on level is now at 66" down. The capacity between on-off level is approximately 41 ga~ons. MUNICIPALITY OF ANCHORAGE DEPT. ©E HEALTH & $ & S ENGINEERING ENVIRONMENTAL PROTECTION 17034 Eagle R~ver Loop Road No. 204 R vo ,, l.sk. ' ;FEB 1 ? 1987 RECEIVED REPLY PATE OF REPLY SiG~N A~T:R ~O~R [~p L i~[ ~ ROUTING SYMBOL From: JTITLE OF REPLIER RETAINED BY ADDRESSEE APPLI¢"~NT FILLS OUT UPPER HA[~'"ONLY Address Zip C6de Phone Address ~ Zip Code June 1975. ~ Community For wells drilled prior to that date, give well depth (attach log if available}. U Public Utility ~//r>~//~ When Connected to Public Utility: ~ Holding Tank //~ 7/~ / s- NOTE: THE INSPECTION FEE MUST ACCOMPANY EACH RE~EST BEFORE ~OCESSING CAN BE INITIATED. Field Notes: I o ~-J;~ ~-~1 ~ ~ ~ ~ , ~ ~ t '-AL~ OF ANCHO~GE ~ ~ - ~ ~'~O~J '~ ~., ( } CONDITIONAL APPROVAL* h' ' ~ Well TO Absorption Area Well Log Received ~ ~ ~