Laserfiche WebLink
y 24, 1977 <br />»letion <br />igs were <br />^ 17. <br />• the <br />;hs. A <br />no <br />lies <br />ordance <br />lent of <br />the City <br />bottom <br />ilade to <br />itural <br />Two <br />of the <br />fully <br />hes over <br />ght with <br />day. An <br />to <br />id soils <br />the <br />og of <br />uvium <br />from <br />1 till <br />-foot <br />silty <br />the 4- <br />lluvium <br />ayey <br />ot depth <br />nderlain <br />ion <br />: - ■ <br />i . <br />a. <br />I i 1 <br />Ea..- /i. . • . - -> .a. - <br />77-045 <br />Brauer ^ Assoc., Inc.-3-February 24, 1977 <br />Percolation tests indicating the soil absorptivities <br />minutes per inch (mpi) are as follows. <br />in <br />Test # <br />Surface <br />Elevation <br />Soil at <br />Test Depth <br />Rate <br />Cmpi) <br />Lot 5 P-1 <br />P-2 <br />P-3 <br />P-4 <br />P-5 <br />P-6 <br />101.4 <br />102.2 <br />98.4 <br />99.3 <br />96.5 <br />96.5 <br />Silty <br />Silty <br />Silty <br />Silty <br />Silty <br />Silty <br />Sand <br />Sand <br />Sand <br />Sand <br />Sand <br />Sand <br />(SM) <br />(SM) <br />(SM) <br />(SM) <br />(SM) <br />(SM) <br />42 <br />17 <br />16 <br />14 <br />9 <br />9 <br />Lot 4 P-7 . <br />P-8 <br />P-9 <br />P-10 <br />P-11 <br />P-12 <br />106.6 <br />105.7 <br />103.9 <br />102.7 <br />99.0 <br />97.1 <br />Silty <br />Silty <br />Silty <br />Silty <br />Silty <br />Silty <br />Sand <br />Sand <br />S«ind <br />Sand <br />Sand <br />Sand <br />(SM) <br />(SM) <br />(SM) <br />(SM) <br />(SM) <br />(SM) <br />25 <br />20 <br />20 <br />23 <br />17 <br />22 <br />The average percolation rate for the six tests taken in Lot <br />S then is^lS mpi. The average of the six percolation tests <br />taken in, Lot 4 is then 21 mpi. <br />RECOMMENDATIONS: <br />You have indicated that 3-bedroom single family dwellings <br />are proposed for the lots. <br />Based on the results of the soil borings and the percolation <br />tests, it is our opinion that s°ii> water table, installa- <br />absorptivity conditions encountered “T®. fi^d Is^^ <br />tion of individual sanitary systems with a drain field <br />the soil absorption unit for each of the lots. <br />A minimum of 200 square feet of absorptive trench per bedroom <br />win ^required oS each lot. based.on the <br />the proposed 3-bedroom homes, a minimum of 600 square teet <br />of abL?ptive area will be required. It is our opinion that <br />the underlvine soils are in a state somewhat drier than <br />normal and during periods of normal conditions, percolation <br />rates may be somewhat higher. For this reason, we would <br />^ecoLend a minimum of 800 square ll-incHfor each lot. This requirement could be met by four 30 inuh <br />wide trenches, 80 lineal feet in length each, with 7-foot <br />center to center spacing. <br />■i -I <br />Ml <br />I <br />77-04' <br />Brauci <br />Power <br />the St <br />tered, <br />surfac <br />suppor <br />nient. <br />the ho <br />soils <br />excava <br />1ikely <br />tion. <br />are en <br />buildi <br />GEN!:R,4 <br />It has <br />projee <br />these <br />DMR/CGK <br />I h# content of Lkilj rtpofi i * d sui.por <br />«rt malie no reptesenuiion and assuf