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HomeMy WebLinkAbout1986-05-28 Septic System Design ReportS-P TESTING, G, INC. 951 KATYDID LANE ST. MICHAEL, MN 55376 497-3566 STEVE SHIRMERS May 28, 1986 Larry Higgins Dakota Avenue WC) Orono, Henn. Co., MN. Long 1-c K v 4/? S 16j'L1 This system is designed for a Type 1, four bedroom home and in accordance with the Minnesota Pollution Control Agency standards WPC 40 and local ordinances. The soils on this site are typical of SCS soils mapped - HbC - Hayden loam. This site has had the upper layer of soil removed. The soils indicate mottled soil at 24" to 48", (old mottling). With this being the wettest season and the borings had no standing water, it is my opinion that the water table is no longer present. A shallow system will need to be installed 18" deep with a minimum of 6" of cover over the rock. A pumping chamber will need to be installed and it iL recommended that the system be put under pressure, distribution be handled the same as a mound system. The supply line pipe must have back drainage to the pumping chamber. The power supply and switches must be located outside the manhole and pump- ing chamber in a weather proof enclosure. A warning device must be installed with a light and sound device, this is in case of a pump failure. (Mercury floats are a good method). This site has an existing failing system. The tanks may be used upon approval by the local inslector. The soils at a depth of 1�" have a percolation rate averaging 15.9 min/inch and are adequate for trea ing septic effluent. All neighboring wells are located more than 75' away from the proposed treat- ment area. The well on this site is more than 50' away. This system may need to have the water use lowered if the effluent raises above the rock. The inspection pipe should be installed in the rock layer above the distribution pipe. Keep all heavy equipment off of the proposed treatment area before and after construction as much as possible. The treatment area should be marked off before construction. With proper installation and maintanance, this system should have no problem in treating septic effluent effectively. It is recommended that the 2 years. Soil and Percolation Tests Septic System Design septic tanks be pumped every Steven B. Schirmers SBS/ds . } ( \t,p k$a !®o }}$ )�k a E . 0 f - a © a)) t �ZJ I). | ) . w-- z j o \ to o w � I Z o .i 5 d O _I W to W ✓ E I 1 � C r E ` dCD , I I Z I J I w w w w w F m 1 1 r E I,• _ d av 1 v 8 Q Z Ocr N �� u G �' a 4 3 2 - m W U 1 T1 bi v i -T f I Z g S'� o k 9= _ o w E Est �A U'•— Q �pY C ` O \ t v a f L$ 3 �Zi � G u n ° co 0 o w r OWF O In d � a Q.a o i 010 o e _ t r _•i � ° ♦a I '6 n � W O N \ 1 0 �• O in LG - � C � N N 0- p�:; 'd',4 E p J PH O Z �cvt s 3 saw — tL ti o 2 4 c E E + Q I�roll Igq N d 8 ° � x N o O2 QQ F Q 11{ 4 $ n r,o,E E n 0$ E `id z N N N O n s I 1 C J py1 • °ITi� Y V P 1n I F.. O 3 O N o p v O a �C EI 3 � �, a- ••- 10 N v wN .r 3 IT z a Z W L-13 Logs of Soil Borings Location or Project Larry Higgins Borings made by S-P Testing, Inc. Steve Schirmers Date 5-8-86 Classifiction System: AASHU USDA-SCS X j Unified ; Other Auger used (check two): Hand X or Power , Flight or Bucket x Depth, Boring number 1 Depth, Boring number 2 in feet Surface elevation 101.4 in feet Surface elevation 102.0 0 - 0 - TopsoOl -" d6brown loam Topsoil dark brown loam 1 - Brown clay loam 1 - Brown clay loam 6" - 1-1/2' Brown loam 1-1/2' - 2'2" 2 2 - 8" - 1110" Brown loam 2'-mottling Gray brown silty 2,2" - 21811 loam 3 3 - Olive brown loam w/traces of sand 3'4"-mottling 4 - 2'8" - 4'2" 4 Olive brown loam Olive brown strong 'oam 5 - w/traces of silty loam 5 - 6 - 402" 6' 6 - 4' - 6' 7 - 7 - 8 8 - End of boring at 6 feet. Standing water table: present at feet of depth, hours after boring. Not present in hole X Mottled soil: Observed at 2 feet of depth. Not present in hole Comments: End of boring at 6 feet. Standing water table: present at feet of depth, hours after boring. Not present in hole X Mottled soil: Observed at 3'4" feet of depth. Not present in hole Comments: L-13 Logs of Soil Borings Location or Project Larry Higgins Borings made by S-P Testing, Inc. Steve cchirmers Date 5-8-86 Classifiction System: AASHU ; USDA-SCS X ; Unified ; Other Auger used (check two): Hand X , or Power , Flight or Bucket X Depch, Boring number 3 Depth, Boring number in in feet Surface elevation 102.0 feet Surface elevation 0 - 0 - Topsoil dark brown loam 1 - 1 •- 0 - 1-1/2' Brown clay loam 2 - 1-1/2' - 2' 2" 2 - 3 - Brown loam 3 - 4 - 2'2" - 4'-mottling 4 - Olive brown loam 5 - 4' S' 5 - Olive brown sandy silty loam 6 - 5' 6' 6 - 7 - 7 - 8 - 8 - End of boring at 6 feet. Standing water table: present at feet of depth, hours -after boring. Not present in hole X Mottled soil: Observed at 4 feet of depth. Not present in hole Comments: End of boring at feet. Standing water table: present at feet of depth, hours after boring. Not present in hole Mottled soil: Observed at feet of depth. Not present in hole Comments: PERCOLATION TEST DATA SHEET Percolation test readings made by Steven B. S c h i r me r s on 5- 9- 8 6 starting at 1: 4 8 A.M. 1 WWI Tat hole location Larry Higgins , Hole numbct 1 Date bole was prepared 5 - 8 - 8 6 Depth of hole bottom 18 Diameter of hole 6 inches Soil data from test hole: Depth, inches 0 - 6" 6" - 18" Method of scratching -idewali Knife Soil texture Toposil dark brown loam Brown clay loam Depth of gravel in h atom of hole 2 inches 5:0Op. m. Date and hour of initial water filling 5 - 8 - 8 6 , Depth of uu al water fillip, 12 aches above hole bottom Method used to maintain at least 12 inches of water depth in hole for at least 4 bouts _ —nma t-ic s i ohnn , Maximum water depth above bole bottom during test_ 6 inches Time Time interval, rr.inutes Measurement. inches Drop in water level, inches Percolation We. minutes per inch Remarks f' :48 2:03 6 5 6 16.0 15 n i n 7. " 18.'_. 0 7 2:21 2 : 3 6 13 16 -� ■ --- ■ Percolation rate - 17 • 2 m nums per inch. PERCOLATION TEST DATA SHEET i Percolation test readings made by Steven B. SchirnPrs oR 5-9-86 sjAning49 pm wl i) Test hole location Larry H i qg i n s , Hole numbct 2 , Date hole was preps 5 — 8 — R 6 Depth of hole botto*n 18 inches, Diameter of hole 6 inches Soil data from test hole: Depth, inches 0 — 8" 8" — 18" Method of scratching sidewall K n i f P Soil texture Topsoil dark brown loam Brown clay loam Depth of gravel in bottom of hole 2 i �':OOp. m. Date and hour of inival water filling 5 — 8 — 8 6 , Depth of initial water filling 12 inches above bole bottom Method used to maintain at least 12 inches of water depth in hole for at least 4 hours Automatic siphon , Maximum water depth above hole bottom during test 6 —jnches - Time Time interval, minutes Measurement. inches Drop in water level, inches Percolation rate, minutes per inch Remarks 1 : 3 8 prefi11 6 H N M N N N N 11 N N Percolation tau - 20 . 0 minutes per Inch. PERCOLATION TEST DATA SHEET Steven B. Schirmers 00 5-9-86 � Vim.; Percolation test readings madc by carting 1 : 51 �wq Test hole Larry Higgins , Hole number 3 , Date tole was prepared 5 - 8 - 8 6 Depth of hole bottom 18 inch-s, Diameter of hole 6 incM. Soil data from test hole: Depth, inches Soil texture 0 - 18" Topsoil dark brown loam Method of scratching sidewalk Knife Depth of gravel in bottom of hole 2 inches 5:OOp. m. Date and tour of initial water filling S - A -A 6 Depth of initial water filling, 12 inches above tole bottom Method used to maintain at kast 12 inches of water depth in hole for at least 4 Automatic siphon , Maximum water depth above hole bottom 4urW test 6 inches Time Time int:rval, minutes Measurement, inches Drop in water level, inches Percolation rate, minutes per inch Remarks 1:38 prefill 6 1:51 2:06 6 1-1/2 10.0 15 min 2:09 2:24 1-3/8 10.9 " 2:25 2:40 " 10.6 6 Percolation rate - minutes per itch. 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