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HomeMy WebLinkAbout034-1093-02-000 (2) Nk�sconsin P ,partment of Commerce SOIL AND SITE EVALUATION Page � Of 3 Divilion dlllftety and Buildings in accordance with Comm 85,Wis.Adm.Code Attach complete site plan on paper not less than 8%x 1 I inches in size. Plan must include,but County St.Croix not limited to:vertical and horizontal reference point(BM),direction and percent slope,scale or dimensions,north arrow,and location and distance to the nearest road. Parcel ID# D mLlof APPLICANT INFORMATION-Please print all information eviewe Date: Personal information you provide may be used for secondary purposes(Privacy Law,s.15.04(1)(m)). -3 Property owner: Property location Kurt and Elizabeth Christensen Gov't lot: NW 1/4 NE 1/4 S07 T 29 N, R15 E(orR Property owner's mailing address: Lot# Block# Subd.Name r csM# i <�? 877 Benoy Road tO NA- N 1� City/State/Zip Code Phone number: city Village own Nearest Road Hudson/Wisconsin/54016 715-386-6340 Springfield 110th Avenue El New Construction Use El Residential/Number of bedrooms Unknown Addition to existing building:NA 0 Replacement 0 Public or commercial-describe Code Design Flow Rate:Unknown-must be appropriate size for the contour and soil restrictions Parent Material:Glacial Till-ground moraine General Comments and Recommendations:Soils are somewhat poorly drained aqualfs or glossoboralfs underlain by clay loam. Redox features are the result of perching above the dense clay loam layer. A long narrow mound SAS is recommended for this site with 2.50 foot of sand fill. ON-SITE REQUESTED DUE TO A+0 SITUATION. SOIL DESCRIPTION REPORT Boring# Horizon Depth Dominant Redox Description Texture Structure Consistence Boundary Roots Soil Application Rate in. Munsell Color Qu.Sz.Cont.Color Gr.Sz.Sh. GPD/FT2 Pit I Eff4 1 Eff#2 Ap 0-10 l OYR 3/2 NA sil 2msbk mfr as 2f 0.5 0.8 Ground Btl 10-14 l OYR 4/3 fl d 7.5YR 5/8 sl w/cl Imsbk mfr gw if 0.4 0.6 Elev(ft.) 103.02 Bt2 14-16 7.5YR 4/4 m3p 7.5YR 5/8 scl Ifsbk vmfi as NA 0.2 0.3 Depth to C 16-20 5YR 4/4 m3p 7.5YR 5/8 scl massive limiting factor-in. 0 Remarks: Boring# Ap 0-5 10YR 3/3 NA sil 2fsbk mfr as 2f 0.5 0.8 Pn 2 E 5-7 1 OYR 4/3 NA sl 2fpl mfr gw 1 f 0.4 0.6 Bt 7-13 l OYR 4/4 f2d 7.5YR 5/6 sl w/cl l fsbk mfi gw NA 0.4 0.6 Ground Elev(ft.) C 13-18 5YR 4/4 m3p 7.5YR 5/8 scl massive 102.48 Depth to limiting factor-in. 0 Remarks: f CST Name: Eli M.Gottfried, Gottfried Environmental Signature:, ,� Tel.No.715-833-1400 Address: 124-1/2 Graham Ave. Eau Claire,Wl.54701 Date:22 July 2003 CST#221981 SOIL DESCRIPTION REPORT Propeqv owAer Christensen Parcel ID# Boring# Horizon Depth Dominant Redox Description Texture Structure Consistence Boundary Roots Soil Application Rate in. Munsell Color Qu.Sz.Cont.Color Gr.Sz.Sh. GPD/FTZ Pit 3 Eff#1 Eff#2 Ap 0-2 l OYR 3/2 NA sit 2fsbk mfr aw 2f 0.5 0.8 Ground E 2-7 1 OYR 4/4 NA sit 2fsbk mfr gw if 0.5 0.8 Elev(ft.) 103.02 Bt 7-10 7.5YR 4/4 f2d 7.5YR 5/8 sit w/cl 2fsbk mvfi as NA 0.5 0.8 Depth to C 10-14 10YR 5/4 m3p 7.5YR 5/8 sicl massive limiting factor-in. 7 Remarks: Boring# Horizon Depth Dominant Redox description Texture Structure Consistence Boundary Roots Soil Application Rate in. Munsell Color Qu.Sz.Cont.Color Gr.Sz.Sh. GPD/FTZ Pit 4 Eff#I Eff#2 Ap 0-7 l OYR 3/2 NA sit 2msbk mfr aw 2f 0.5 0.8 Ground E 7-10 l OYR 4/3 fl d 7.5YR 5/8 sit w/Cl 1 mpl mfr aw 1 f 0.2 0.3 Elev(ft.) 98.40' Bt 10-16 7.5YR 4/4 m2d 7.5YR 5/8 sid Imsbk mfi gw NA 0.2 0.3 Depth to C 16-19 7.5YR 4/4 m3p 7.5YR 5/8 cl massive limiting factor-in. 0 Remarks: Boring# Ap 0-8 l OYR 3/2 NA sil 2msbk mfr aw 2f 0.5 0.8 Pit 5 E 8-11 1OYR 4/3 fld 7.5YR 5/8 sit w/cl lmpl mfr aw If 0.2 0.3 Ground Bt 11-15 7.5YR 4/4 m2d 7.5YR 5/8 Sid lmsbk mfi gw NA 0.2 0.3 Elev(ft.) 97.80' C 15-18 7.5YR 4/4 m3p 7.5YR 5/8 cl massive Depth to limiting factor-in. 0 Remarks: Boring# Horizon Depth Dominant Redox description Texture Structure Consistence Boundary Roots Soil Application Rate in. Munsell Color Qu.Sz.Cont.Color Gr.Sz.Sh. GPD/FTZ Pit 6 Eff#1 Eff#2 Ap 0-7 10YR 3/2 NA sit 2msbk mfr aw 2f 0.5 0.8 Ground E 7-13 l OYR 4/3 fl d 7.5YR 5/8 sit w/cl 1 mpl mfr aw 1 f 0.2 0.3 Elev(ft.) 98.40' Bt 13-15 7.5YR 4/4 m2d 7.5YR 5/8 sid Imsbk mfi gw NA 0.2 0.3 Depth to C 15-20 7.5YR 4/4 m3p 7.5YR 5/8 cl massive limiting factor-in. 0 Remarks: CD �CD c p N `p' 0 P C 0 z .Q' 4 O O (p o :3 y — �r C O C' d � CD C -e V - - - - - - - - - - - - - O (A.� ^� o W CND -s a m CL to _ - - - - - ;K- CD � - - - - - CD ` 0 Q O CD - Co - -4s,- - - - - - - - - - - O - �- iD a� � o O � Q (Cnnw S' m � c� o � 0 v' - co Z = 0 cn a w_ CD ca m C 'a m CD 0 w Q °m 00 wcn � Q NN) -0 O CD oCDC ti nV, � N CD N � Q .. X � � II O -. 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CROIX COUNTY,WISCONSIN Creation Date Historical Date Map# Sales Area Application# Permit# Permit Type 02/17/2005 00 0 Tax Address: Owner(s): O=Current Owner, C=Current Co-Owner KURT CHRISTENSEN O-CHRISTENSEN, KURT 847 WYLDWOOD LN HUDSON WI 54016 Districts: SC=School SP=Special Property Address(es): '=Primary Type Dist# Description '2765 110TH AVE SC 2198 GLENWOOD CITY SP 1700 WITC Legal Description: Acres: 2.600 Plat: 10-047-MEADOW WOODLAND LOTS 1/3 034-05 SEC 7 T29N R15 PT NW NE MEADOW WOODLAND Block/Condo Bldg: LOT 002 ('05)LOT 2 Tract(s): (Sec-Twn-Rng 401/4 1601/4) 07-29N-15W NW NE Notes: Parcel History: Date Doc# Vol/Page Type 02/27/2006 819301 EZ-U 01/19/2005 785238 10/047 PLAT 2008 SUMMARY Bill#: Fair Market Value: Assessed with: Use Value Assessment Valuations: Last Changed: 06/15/2007 Description Class Acres Land Improve Total State Reason AGRICULTURAL G4 2.600 450 0 450 NO Totals for 2008: General Property 2.600 450 0 450 Woodland 0.000 0 0 Totals for 2007: General Property 2.600 450 0 450 Woodland 0.000 0 0 Lottery Credit: Claim Count: 0 Certification Date: Batch#: Specials: User Special Code Category Amount Special Assessments Special Charges Delinquent Charges Total 0.00 0.00 0.00 LEGAL ST. CROIX COUNTY,WISCONSIN OLD TXSCR02 REAL ESTATE TOWN OF SPRINGFIELD COMPUTER NUMBER 034-1014-30-000 Parcel Number 07.29.15.99 OWNER NAME: First DANIEL G &PAMELA J Last SCHMIT PROPERTY ADDRESS: Hse# 1/2 PD--Street Name-- Type SD Apartment SECTION 7 TOWN 29N RANGE 15W %160 '/.40 Line Description Line Description TOTAL ACREAGE 40.000 PLAT LOT BLK 01 SEC 7 T29N R15W SW NE 40A 15 02 16 03 17 04 18 05 19 06 20 07 21 08 22 09 23 10 24 11 25 12 26 13 27 14 28 F1-General, F4-Prev. Parcel, F5-Next Parcel, F7-Valuations, F8-History, F10-Exit ' SAFETY AND BUILDINGS DIVISION commerce.wi.gov Integrated Services Bureau 13 East Spruce Street ■ Chippewa Falls,WI 54729 INSPECTION REPORT www.commerce.state.wi.us/sb Department of Commerce (715)726-2544 Date of Inspection: April 21, 2003 Plumber Name and Address: Project Name: Christensen Unknown Use: Residential Legal Description: NW, NE, 07, 29, 15W Site Number: Certified Soil Tester Name and Address: Subdivision: NA Eli M. Gottfried, CST 221981 Municipality: Town of Springfield 124 '/2 Graham St County: St, Croix Eau Claire Wil 54701 Plan Transaction Number: 1006007 Owner Name and Address: Sanitary Permit Number: Kurt& Elizabeth Christensen 877 Benoy Rd Wastewater Flow: 450-600 gpd Hudson WI 54016 Persons Present: E. Gottfried (715) 874-6280 An onsite soils verification was conducted at the above referenced site as per district policy for all sites with less than four inches of unsaturated soil below the bottom of the A horizon. The intent of this investigation is to confirm initial observations by the certified soil tester (CST) relating to the presence or absence of redoximorphic features in the A horizon and/or subsoil. In-situ soil texture, structure, and consistence factors were also reviewed as they relate to wastewater application rates. Other site conditions such as percent and direction of slope, landscape position, land surface contour length, and surface water hydrology may also be noted and their effects are factors considered in the recommendations and conclusions portion of this report. A typical soil profile could be described as follows: East Lot 00-02" 10YR 3/3 sil, 2m-cgr, mfr, aw. 02-06 10YR 3/3 sil, 2msbk, mfr, as. 06-08" 10YR 3/2 sil, 2msbk, mfr, as. 08-12" 10YR 4/4 sil, 2msbk, mfr, cw, w/c3f 10YR 416 and 5/3 rmfs. 12-15° 7.5YR 4/4 sil, 1 csbk, mfr, w/f2f 7.5YR 4/6 rmfs. Free water seepage through macro pores at 8 inches after prolonged rainfall. West Lot 00-08" 10YR 3/3 sil, 2msbk, mfr, aw. 08-10" 10YR 3/3 and 10YR 4/4 sil, wmsbk, mfr, cw. 10-16" 10YR 4/4 sil, 2msbk, mfr, cw, w/c3f-d 10YR 4/6, 5/8, 6/3, and 5/3 rmfs. Free water seepage through macro pores at 8 inches after prolonged rainfall. If a mound system is designed to overcome limitations of a high level of seasonal soil saturation and slow permeability, the linear loading rate should not exceed 4.0 gpd/ft and the basal wastewater application rated should not exceed 0.2 gpd/ftz. The additional basal area will partially compensate for the gentle land slope and prevent wastewater leakage at the mound toe. At least 30 inches of sand lift is recommended when applying septic tank effluent to the distribution cell of the mound to ensure proper treatment. The longest portion of the mound must be orientated along the contour. The mound shall be constructed to divert surface water around the mound structure as much as possible. In addition, an up slope drainage ditch should be considered if it is determined that surface or subsurface hydrology is improved by intercepting water and diverting it away from the mound site. Page 2 of 2 Christensen Site— 110`h Ave April 21, 2004 If there are any questions regarding this report, please contact me. Mroy G. J ky, Wast ter Spe list Ljansky @c mmerce.state.wi.us E-mail 715/726-2544 Voice 715/726-2549 Fax cc: MCounty ❑ Plumber ® CST ❑ Owner ❑ Other Safety and Buildings 4003 N KINNEY COULEE RD commerce.Wi.gov LACROSSE WI 54601-1831 i ■ TDD#:(608)264-8777 ��O �' www.commerce.state.wi.us/sb Department of Commerce www.wisconsin.gov Jim Doyle,Governor Cory L.Nettles,Secretary June 11,2004 CUST ID No. 42258 ATTN:POWTS Inspector ELI M GOTTFRIED GOTTFRIED ENVIRONMENTAL ZONING OFFICE 124 1/2 GRAHAM AVE ST CROIX COUNTY SPIA PO BOX 1645 1101 CARMICHAEL RD EAU CLAIRE WI 54702-1645 HUDSON WI 54016 CONDITIONAL APPROVAL PLAN APPROVAL EXPI4ES: 06/11/2006 Transaction ID No 1006007 SITE: Kurt&Elizabeth Christensen Site ID No 684627 T Pleass�rtv�a 110TH Ave Site Ale Town of Springfield, St Croix County NW 1/4,NE 1/4, S7,T29N,R15W (gyp rs Lot 5(Proposed4.ets��- N� �� LpIt�TID�VS .alll /17 Z FOR: Object Type: Soil Saturation Determination Regulated Object ID No.:962040 The submittal described above has been reviewed for conformance with applicable Wisconsin Administrative Codes and Wisconsin Statutes. The submittal has been CONDITIONALLY APPROVED. The owner,as defined in chapter 101.01(10), Wisconsin Statutes, is responsible for compliance with all code requirements. The following conditions shall be met during construction or installation and prior to occupancy or use: 1. Approval is hereby granted pursuant to Comm 85.60(2),Wis.Adm.Code to estimate the depth to seasonal soil saturation based on an interpretative determination. This approval and determination negates the requirement in Com 85.30(2)(b),Wis.Adm. Code to designate the ground surface as the highest level of saturation when redoximorphic features are less than 4 inches below the bottom of the A horizon. 2. At least 30 inches of sand lift on top of a 6 inches minimum of unsaturated in-situ soil for adequate treatment and dispersal is required. 3. The basal soil application rate shall be 0.2 gpd/ft^2,and the linear loading rate 4.0 gpd/foot. 4. Chisel plowing to a depth of 12 inches immediately prior to sand placement is required to improve vertical water movement into the soil solum that is weakly structured and slowly permeable. 5. Landscaping up slope of the mound shall be incorporated into the mound design to divert surface water drainage around the mound system. 6. Perimeter side slopes on the mound shall be at least 4:1 rather than the standard 3:1 slope ratio. 7. Up slope surface water diversions are required to ensure the mound areas down slope remain a dry as possible. 8. This approval shall remain valid unless the site is altered in such a way that the depth to soil saturation would change of if saturated conditions were observed for seven consecutive days at depths less than 3 feet below the infiltrative surface of the POWTS distribution component. 9. This approval in no way relinquishes the use of color patterns to estimate the depth to high groundwater on any other parcels or portions of parcels. 10. A copy of this approval letter and attachments must accompany the mound system plans for this site. t ELI M GOTTFRIED Page 2 6/11/04 A copy of the approved plans,specifications and this letter shall be on-site during construction and open to inspection by authorized representatives of the Department,which may include local inspectors.If plan index sheets were submitted in lieu of additional full plansets,a copy of this approval letter and index sheet shall be attached to plans that correspond with the copy on file with the Department.All permits required by the state or the local municipality shall be obtained prior to commencement of construction/installation/operation. In granting this approval the Division of Safety&Buildings reserves the right to require changes or additions should conditions arise making hem necessary for code compliance.As per state stats 101.12(2),nothin in this review g rY P P g shall relieve the designer of the responsibility for designing a safe building,structure,or component. Inquiries concerning this correspondence may be made to me at the telephone number listed below,or at the address on this letterhead. Sincerely, Fee Required$ 100.00 Fee Received$ 100.00 Balance Due $ 0.00 Leroy G. sky, Wastewater Specialist Integrated Services Bureau (715)726-2544 Voice (715)726-2549 Fax Ijansky@commerce.state.wi.us 1 t GOTTFRIED ENVIRONMENTA44 CF/ � • 124 Graham Ave. Eau Clare WI 54701. 715-833-1400 � F telephone: 715-833-1400; fax: 715-833-1381;email: elicstm(u,sbcglobal.net -19` O INTERPRETATIVE REPORT `4 « , P.O.W.T.S. • May 7, 2004 10 ® 6 ® 0 7 r � Conditionally Proper owner: Kurt and Elizabeth Christensen APPKVVED Legal Description: NW NE 07 29 15W DEPARTMENT OF COMMERCE Springfield, St. Croix County D DINGS SEE CC(4RESP04bENCE INTRODUCTION On 22 July 2003, a soil test and evaluation was conducted by this soil tester on the property described above. The soil test was done in response to a request by the property owner, Elizabeth Christensen, as part of the development of this parcel for residences. The proposed lots noted in this report are part of a parcel of land originally encompassing approximately 30 acres. In a previous interpretive report, approximately 20 acres of this land was assessed for the placement of mound type septic systems. On 21 July 2003, an approval of the interpretive report for the north 20 acres was issued(Transaction number# 888116). It is the intention of the property owners, Kurt and Elizabeth Christensen,to subdivide this south 10 Acre (approximate)portion of land into 2 parcels. Each parcel is intended to have 1 residence. This portion of land lays immediately south of lots 3 and 5 of the original CSM. RATIONAL FOR THE INTERPRETIVE REPORT High and low chroma features in the soil as compared with matrix soil colors are considered as indicators of seasonal saturation in the State of Wisconsin. Department of Commerce Comm 81.01 (118) states: "High groundwater"means zones of soil saturation which include perched water tables, shallow regional groundwater tables or aquifers, or zones that are seasonally,periodically or permanently saturated. Comm 81.01 (119) further defines evidence of seasonal saturation in the soils: "High groundwater elevation"means the higher of either the elevation to which the soil is saturated when observed as a free water surface, or the elevation to which the soil has been seasonally or periodically saturated as indicated by the highest elevation of redoximorphic features in the soils. At least 36 inches of soil separation is required between the bottom of the soil absorption system and the redoximorphic soil features in most types of soils (Table 83.44-3, Department of Commerce). Where this does not exist, an above ground SAS must be constructed(i.e. mound or 1 r . T • , At-Grade). The initial determination of this site has found the site to be unsuitable for mound type septic systems (Soil Absorption System), as per WAC Comm 85.30(2)(a) and(b). This code section mandates that: 1. Redoximorphic features be used as an indicator of seasonal saturation in the soils. 2. Redoximorphic features appearing at depths of within 4 inches of the bottom of the A horizon shall be interpreted as seasonal saturation occurring at ground surface ("Unless determined otherwise...,the highest elevation of seasonal soil saturation shall be the ground surface where redoximorphic features are present within 4 inches of the bottom of the A horizon.") Although Comm 85.30(2)(b) mandates that redoximorphic features within 4 inches of the A horizon be interpreted as seasonal saturation to ground surface, Comm 85.60(2)(a) allows for an interpretive determination of the soil conditions and depth to seasonal saturation should this condition exist. This section states in part: "A written report by a certified soil tester evaluating and interpreting redoximorphic soil features ... may be submitted to the department in lieu of high groundwater determination data. The written report shall conclusively demonstrate that the existing soil morphological features or color patterns are not indicative of current conditions of periodic soil saturation." This is the basis for the current report. GEOLOGICAL HISTORY The subsurface formation in St. Croix County consists of the Prairie Du Chien Group (dolomite and sandy dolomite). Depth to bedrock ranges from 0 - 15 meters (Brown, B.A. (1988)). This formation is of Ordovician origin(Paleozoic era 425 mya). Dolomite appears to have been laid during the early Ordovician period, while the sandstone was laid during the late part of the period (Paull, R.K. and Paull, R.A. (1977)). Glaciation of St. Croix County occurred many times during the history of the earth, although the most recent glaciation, during the Pleistocene epoch(approximately 1 million to 10,000 years before present), is the most apparent. There were several stages of glacial advance, the most recent being the Wisconsinan stage. This was the result of the advance of the Superior Lobe and, from this, the Chippewa Lobe (Martin, L. (1965). The Physical Geology of Wisconsin. University of Wisconsin Press, Madison, Wisconsin). St. Croix County appears to be part of the geographical province of the Western Upland. As noted by Paull et al (Paull, R.K., R.A. Paull (1977) Geology of Wisconsin and Upper Michigan. Kendall /Hunt Publishing Company, Dubuque, IA), "The Paleozoic rocks ... are the retreating erosional edges of marine sediments that once extended across the Northern Highland.... Late Cambrian seas washed over the Precambrian erosional surface to deposit more than 1,000 feet of sandstone, with minor amounts of interbedded dolomite." The St. Croix River has its origin in the Northern Highlands and its resistant Precambrian rock. 2 ! 'The loess deposits in St. Croix County appear to be the result of the westerly winds carrying fine textured soils easterly to the eastern bluffs of the river and beyond. The soils observed on site suggest that the area has been influenced by glaciation. Soils appear to be loess (fine-textured, wind blown soil), underlain by glacial till. The glacial till present as parent material in the subsoil of the Christensen site is most likely the result of deposit from the Superior Lobe (Chippewa Lobe) material. Loess, present as soil of the Ap horizon, may be the result of the influence of the wind-blown fines of the St Croix River floodplain. DESCRIPTION OF THE SITE The parcel of land under investigation lays in the NW 1/4 of the NE '/4 of Section 7, T29N, R15W, Springfield Township, St. Croix County. All land lays south of 1 l oth Avenue, east of County Road D and west of 280th Street. Lot 1 — South of established lot 5 The proposed mound site is located in the southwest corner of the proposed lot. The slope on this site is 3.6%to the west and northwest. The mound is sited at a high elevation of the site, although not the highest. Soils are composed of silt loam underlain by clay loam and sandy clay loam. Soil survey maps for the area indicate that the taxonomic classification of soils on site is Typic Glossoboralf(Freeon series). The soils are further described as having a sandy loam parent material. Lot 2 — south of established lot 3 The site proposed for the mound septic system has similar soils to that in the vicinity of lot 1. However, no sandy loam parent material was observed, although soil maps classify this area as Freeon series soil. It is possible that this soil tester did not dig deep enough to find the coarse material. The slope on this proposed lot is 4%to the west. LOCAL HYDROLOGY As noted on the accompanying plot plans,the proposed dispersal sites have a slope ranging from 3.6 to 4%. The land slopes from the east to the west. General surface flow appears to be west towards the Eau Galle River, based on the topographic map for the area. Local subsurface flow presumably also flows west towards the river. Regional flow may be west towards the St. Croix River. The topographic maps consulted for this report do not indicate any wetland areas in the immediate vicinity of the proposed mound dispersal systems. No naturally occurring areas of standing water were observed in the area of the proposed mound POWTS. There are however, areas of converging slopes north and south of the proposed mound sites. These areas of r 1 'AM converging slopes drain to the west. SOIL MAPPING OF THE AREA Direct soil mapping of this area by this soil tester indicates that, taxonomically, this soil is an Aquic Glossoboralf. Aquic Glossoboralfs have a boric temperature regime with elluvial and illuvial horizons which are saturated at some time during the year(as evidenced by the redoximorphic features). Soil series maps for this area characterize this area however as Typic Glossoboralf. The profile is described as being slightly acidic, suggesting that the profile is aged. The aging may be due to a greater than average amount of water movement through the soil. Specifically, soils in this area are mapped Freeon(FnB). According to the St Croix County Soil Survey book, native vegetation for this area was primarily white pine, red oak, and hard maple. According to the National Audubon Society Field Guide to North American Trees (Eastern Region), (copyright 1998, Chanticleer Press Inc.,NY,NY), white pine grows in well-drained soils. Red Oak(also known as Scarlet Oak and Black Oak), grows in upland ridges and slopes. Maple grows in upland moist soils. All 3 types of trees therefore, appear to grow in well-drained or moderately well-drained soils. In relation to their tendency to grow in wetlands or histic soils, the 3 are classified as facultative plants (red, silver maple), or non-wetland plants (white pine). As noted in the CST Soil and Site Evaluation, clay loam and silty clay loam was encountered in all pits in the vicinity of the proposed mound soil absorption systems. Depth to these layers varied from 7 to 11 inches. SIGNIFICANCE OF REPORTED SOIL CONDITIONS AND SURFACE WATER FLOW General surface water flow in the area may be primarily vertical for the first 7 inches (approximately) as a result of the relatively permeable upper horizons. Permeability is moderately slow in the subsoil and is most likely perching above the dense silty clay loam subsoil layer. Soil structure may have been impacted as a result of extensive cultivation of these sites, although moderate structure is present in the Ap horizon. Alternatively,the plowing and tilling may have loosened and aerated soils that may have otherwise been compacted as a result of farm machinery traveling over the sites. Platey structure was observed in the subsoil (E horizon), although the structure was weak. The effects of compaction may be present in the Bt horizon. Also present in the Ap horizon, and slightly into the subsoil, were worm channels, suggesting that the upper horizon was aerated enough to support aerobic organisms. Roots and root channels were also present in the 0 to 6" range of the soil profile. Soil colors as noted by this soil tester were 10YR 3/2 from 0-8" (approximately) in the areas of the proposed drainfields. This suggests that, at least in the Ap horizon,there is not an anoxic soil regimen. The lack of redoximorphic features and the light(IOYR 3/2) colors in the Ap horizon in this layer suggests that the soils are not saturated for more than 7 consecutive days. Structure in the Ap horizon was moderate for all the pits observed. In the E horizon platey structure was observed. Although platey,the grade was weak, indicating that water movement, 4 would be impeded but not prevented, from moving vertically. The abrupt appearance of redox ' features in the soil profile suggests that when dense soil conditions are encountered, water remains for a significant period of time. High chroma redox features were encountered in the subsoil starting at 10 to 13 inches. Although not reported on the soil report, low chroma regions (areas of iron depletions)were also observed. No puddled or massive soils were observed in the area of the proposed SAS's to a depth of 7 inches. However, dense, moist firm soils were present. This situation must be addressed in the overall design and construction of the dispersal cell. Close inspection of the Ap horizon did not indicate the presence of redoximorphic features. This suggests that although there is not an A+4 situation, there is adequate depth in the A horizon (approximately 7 inches)to maintain a suitable distance between the bottom of the SAS and the limiting factor and thus to allow for the placement of a mound SAS as per code. HISTIC SOILS Keys to Soil Taxonomy (1994) defines a histic epipedon as follows: "... It consists of organic soil material ... if the soil has not been plowed. If the soil has been plowed, the epipedon normally has a high content of organic matter ... The histic epipedon either has aquic conditions for some time in most years or has been artificially drained." The Keys to Soil Taxonomy defines aquic conditions as: "those [soils] which currently experience continuous or periodic saturation and reduction.... Saturation is characterized by zero or positive pressure in the soil-water and can generally be determined by observing free water in an unlined auger hole." In neither auger holes nor shallow hand-dug pits was standing water observed in the epipedon. In addition, soil colors in the epipedon were not those characteristical of organic soils (IOYR 2/2). Vepraskas (1996) points out 3 possible redoximorphic conditions: 1. Redox depletions around macropores and redox concentrations within the matrix; 2. Redox concentrations around macropores and redox depletions within the matrix; 3. Combination of the 2 conditions. Each of the 3 conditions has a unique etiology. Condition 1 will occur, according to Vepraskas, in situations where there is perching above a dense and slowly permeable layer. Such appears to be the condition described on the site outlined in this report. However, redox depletions were not observed in the macropores in the Ap horizon, in spite of the fact that the structure was strong and the pores were therefore large. CONCLUSIONS No redoximorphic features were observed for at least 7 inches of the Ap horizon in any of the pits evaluated. The soils in this upper 7 inches appeared to be well aerated with the presence of roots and worm channels. Water movement therefore appears to take place in this upper layer. 5 r r. There does not appear to be a condition of ponding for any significant period of time in this upper layer. Redoximorphic concentrations appeared in the soils gradually, starting at approximately 7 inches (faint) and increasing in intensity(prominent) at lower depths. The faint redox concentrations may have been accompanied by redox depletions in the macropores Y p although this was not observed. Given the dark soil colors of the Ap horizon, if redox depletion was present, it would have been visible. In the lower horizons, depletions may have been masked by the more reduced matrix colors. Slopes were approximately 4%, suggesting that water does move laterally away from the site. PROPOSALS This soil tester feels that mound systems on these sites would adequately provide effluent treatment and dispersal as long as the follows design conditions are implemented: 1. The construction of the soil absorption system must be in the area designated on the plot plans. 2. Areas lower in the landscape must not be used for soil absorption systems. I 3. The distribution cell must be designed very long and narrow with a linear loading rate less than 4.0 gpd/ft. This may limit the number of bedrooms and/or occupancy that can be serviced on the site. 4. At least 2.50 feet of ASTM C-33 sand must be used under the laterals for proposed lots 1 and 2. 5. Maximum hole spacing in laterals must be 30 inches. 6. Slopes around the mound must be 1:4 rather than the traditional 1:3 to increase the toe absorption area. 7. The area upslope of the proposed SAS must be provided with a constructed waterway to divert water around the mounds. The purpose of the waterway will be to prevent water from being trapped in the mounds. If you have any questions regarding this report, please feel free to contact me at the above address and/or telephone number. Sincerely, Eli M. Gottfried Registered Sanitarian(80806), CST (221981), Licensed Designer(13 10) 6 I - REFERENCES 1. Brown, B.A. (1988) Bedrock Geology of Wisconsin,University of Wisconsin— Extension, Madison Wisconsin. 2. Martin, L. (1965). The Physical Geology of Wisconsin. University of Wisconsin Press, Madison, Wisconsin 3. Paull, R.K. and Paull, R.A. (1977) Geology of Wisconsin and Upper Michigan. Kendall/Hunt Publishing Company, Dubuque, IA. 4. National Audubon Society Field Guide to North American Trees (Eastern Region): (1998) Chanticleer Press Inc.,NY,NY 5. Soil survey of St Croix County(1978). United States Dept of Agriculture Soil Conservation Service and Research Division of the College of Agriculture and Life Sciences, University of Wisconsin. 6. Soil Survey Staff,U.S. Department of Agriculture (1994) Keys to Soil Taxonomy Sixth Edition, United States Department of Agriculture, Soil Conservation Service. 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