Agenda - 05-15-2001-9b - Laserfiche WebLink

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U.$. DEPARTMENT bF AGRICt]LTGRB ',NATURAL RESOURCES CONSEFLVATIgN SERVICE SANITARX FACILITIES Endaote -- SAN;TARP $ACILITIBS .,,~ PAG8 2 OF 3 10/30/00 This report shows Chn degree sad kind o! nail limiCaCiaaa ChaC affect septic tank abaorpCioa fie].da, sewage lagaos~, and eaaitary landlilla. The 1~mi.Cationa are considered "slight" i! soil properties sad ^ite leatuxea generally are favorable for the indicated use sad limitations are minor and easily overcome: "Moderate" i! soil pmpertiea or site leaCurCa are aoe favorable for the indicated use and special piaaairuj deal minimise Cho lin+i.taCions; " ~ ~• or maiateaaace is anedad Ce overcemn er end Severe" i! sail properties or vita features are eo imlaverable or ao difficulC to overcome chat special design, 8lgailicanC iacreasee is consCruction caeca, sad possibly iacreaaed maiatenaace era required. This reporC also ahgwe the suitability v! the aoiln for use as daily cover for landfill#. A racing a! "Good" iadicakea that soil properties and siCe leaCUree are favorable !or the use and good performance sad low mainteaaace can be~ expected: "Fa1r" indicates Chat sail preperciea and site fnaCurea are awderaCely lavorabla for the use acid one or more sail properties er cite leaturea make Cho nail leas desirable Clears the soils rated •Good": aAd rpoo;• in~vatea thaC one er morn soil prop~rCies ar site !encores era unfavorable for the use and avers . properties requires special deal °~g Cho unfavorable ga, e%t;a ma1aC°~+°~+^a• Or cesCly alteration. SEPTIC TANK 1-AS08.PTION PIELCS are arena is which OfflueaC !rem a•aepCic Cask is disCribtrCed late t17e soil thrCUgh . subsurface kilea ar perloraced pipe. only that part o! the soil between depths o! 2s to 71 iaohea is evaluaCed. The ratiage are bane on sail properties, site features, and observed poor,,,=^~e o! the aoila.• Permeability, a high warns Cable, depth to bedrock ox Co a cemented pan, and !loading affect absorption of the e!lluenC. and bedrock ex a Cem~t~ pgn iaCerfere with installation. UasaCislacCory performance o! eepCic Cask abaozpti~onslielda, including excessively slow absorption o! effluent, surfacing o! efflueaC, and hillside seepage, can affect public health. Groundwater can be polluCed i! highly permeable sand and gravel or fractured bedrock is leas than 4 feeC beloar Cho base of Cho absorption field, if slope is exceaeive, ar i! Cho wafer Cable is near the aurfaca. There moat be unsaturaCed soil material beneath the absorption held Ce lilCer the efllueat effectively. Many local ordlaancea require ChaC this material be a! a certain thiclazeas. sEWAG8 LAGObNS are shallow ponds c~tructed to hold sewage while aerobic bacteria decompose the solid sad liquid wastes. Lagoons should. have a nearly level floor surrounded by cut slopes or embanl®eACS o! compacted soil. Lagoons generally era desigand Co hold the sewage within a depth o! Z co 5 lest.- Nearly impervious soil material !or Clre lagoon floor and aides is required Co minimize seepage and c6aCaminaCioa of ground wafer. This report gives ratings !or the natural. soil ChaC makes up the lagoon floor. The 9ilrfaoe layer and, generally, 1 or Z feet of soil, material below Che eurlace layer are rxcavaCed Ca provide material !or the embaa)anenCa.- The ratiaga are based oa soil prapexCies, eiCe feaCUrCS, and observed performance of•the soils. 'Considered in C21e ratings era slope, ps~+~= iliCy, a high water Cable, depth to bedrock or to a cemeaCed pea, !1 , la E7CCC9aivn ae ~~g rge stones. sad coatetrC 4! orgaaiC maCter. epage dun Co rapid pewability o! Chn soil or a wafer table Chat is high enough Co salsa Cho level o! sewage in the lagoon causes a lagoon Co fvactiori+~atialaGCorily. PolluCioa results if seepage is exeeasive or if lloodwaCar overtopa the lagoon. A high coaCeaC o! organic maCCer is dntrimeaCal Ca proper luuetioairng et Cho lagoea because it inhibits aerobic activity. Slope, bedrock. sad cemaaCed pans eaa cause conatructiea preblesma, and large atones can hinder compaction o! the lagoon floor: ~T~Y LANDFILLS are areas where solid waste is disposed o! by burying LC in soil. Thorn are tae types of landfill, trench and area. Ia a Creacp landfill, the waste is placed is a Creech. IC is read with a thin la ap compacted, sad covered daily ynr o! soil excavated at the site. is as area landfill, Cho waste is placed in aueceasive layers as Cho surface o! Cho soil. The waeca is spread, compacted, sad coveted daily wiCh a Chia layer o! soil form a source away from the site. sorb types of load;ill muaC be ably to bear heavy veKicya,ar Craffic. BoCh Cypes iavelve a risk of grouadwatar pollution. Base of exaavaeioa and revegeCatioa aced Co be coaaidered. The rakiaga 1a Ch1a repoz~C are based