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018-2017-10-000 (3)
W Wisconsin SOIL EVALUATION R T #1804 Department of Commerce in accordance with Vdm. ode Page 1 of 3 Division of Safety and Buildings Steel's Soil Service, Inc. Attach complete site plan on f l~ ounty p pa mot the x inc es in size. Plan ust ~ St. Croix include, but not limited to: verti nta fer p nt (BM), An percent slope, scale or dimensions, north arro ion nd di to nearest road. P reel I.D. ~7 Please pn on ~RO1X COUNT`( R ewed Date Personal information you provide may be used for secondary purposes rivao~ - s. 15.04 Z Property Owner Property Location French Homes, Inc. Govt. Lot na SW1/4, NW1/4, S35, T29N R17W Property Owners Mailing Address Lot Block # Subd. Name or CSM# P.O. Box 350 na Croix Hills City State Zip Code Phone Number City E] Village ❑ Town Nearest Road Roberts WI 54023 715-718-2929 Hammond 190Th St ❑ New Construction Use: ® Residential / Number of bedrooms 4 Code derived design flow rate 600 GPD ❑ Replacement ❑ Public or commercial - Describe: na Parent material Silty sediment and underlying reddish sandy loam till Flood plain elevation, if applicable na ft. General comments Mound Design, system elevation 101.85ft based on contour line elevation 100.1 Oft. No deviation from site and recommendations: area with out first contacting soil tester due to poor soil conditions + Qe F 1-1 Boring # Ground surface elev. 100.20 ft. Depth to limiting factor 19 in. ® Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots GPD/ft2 in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. 'Eff#1 'Eff#2 1 0-10 10yr3/2 none A 2msbk mfr cs 1vf .6 .8 2 10-19 10yr4/4 none scl 2msbk mfr gw na .4 .6 3 19-48 10yr4/4 c2d 7.5yr5/6 scl 2msbk mfr na na .4 .6 ❑ ❑ Boring # ® Ground surface elev. 100.20 ft. Depth to limiting factor 15 ✓ in. Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots GPD/ft2 in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 'EM ~-4- 1 0-9 10yr3/2 none I 2msbk mfr a 1vf .6 .8 2 9-15 10yr4/4 none scl 2msbk mfr gw na .4 .6 3 15-27 10yr4/4 f2d 7.5yr5/6 scl 2msbk mfr gw na .4 .6 4 27-48 10yr4/4 c2d 7.5yr5/6 scl om mfr na na .0 .0 i * Effluent #1 = BOD? 30 < 220 mg/L and TSS >30 < 150 m * Effluent #2 = BOD5 <_30 mg/L and TSS <_30 mg/L CST Name (Please Print) Sig re: CST Number David J. Steel - 248956 Address Steel's Soil Service, Date Evaluation Conducted Telephone Number 994 200th St. Baldwin, WI 54002 11/22/2005 715-760-0347 SBD-8330 (R.07/00) L '.Prdpertyowner French Homes, Inc. Parcel ID# Pending Page 2 of 3 [-3]Boring # ❑ Ground surface elev. 98.20 ft. Depth to limiting factor 15 " in. ® Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots GPD/ft2 in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 1 0-9 10yr3/2 none I 2msbk mfr cs 1Vf .6 .8- 2 9-15 10yr4/4 none sCl 2msbk mfr gw na .4 .6 3 15-28 10yr4/4 f1d 7.5yr5/6 scl 2msbk mfr gw na .4 .6 4 28-48 10yr4/4 c2d 7.5yr5/6 SCI om mfr na na .0 .0 F-1 Boring # ❑ Ground surface elev. ft. Depth to limiting factor in. ❑ Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots GPD/ft2 in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 i ❑ Boring # ❑ Ground surface elev. ft. Depth to limiting factor ❑ in. Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots GPD/ft2 in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 Effluent #1 = BOD5> 30 < 220 mg/L and TSS >30 <150 mg/L * Effluent #2 = BODS < 30 mg/L and TSS <30 mg/L The Department of Commerce is an equal opportunity service provider and employer. If you need assistance to access services or need material in an alternate format, please contact the department at 608-266-3151 or TTY 608-264-8777. S131IY8330 (R.07/001 Steel's Soil Service. Inc. STEEL'S SOIL SERVICE INC. 3 of 3 David J. Steel French Homes Inc. 994 200'x' St. CST-POWTSM SWl/4,NW1/4,S32,T29N,R17W Baldwin, WI 54002 Lic. #248956 Town of Hammond, St Croix Co. Direct 715-760-0347 Croix Hills Lot,1 Fax 715-684-3449 This soil evaluation was conducted to satisfy a zoning requirement, it may or may not be suitable for your use. The location of this test may or may not be as shown, as permanent lot lines were not established at the time the soil test was conducted. Legend N 1" = 40' I ♦ = Benchmark Ele. 100.00 ft l Top of 3/4" pvc pipe 2 Z~O • = Alt Benchmark Ele. 99.85 ft ❑ Top of 3/4" pvc pipe = Borings Boring Elevations B 1 = 100.20 ft B2 = 100.20 ft B3 = 98.20 ft l~Ja/ F-~ ~`O r B4 = 0.00 ft ILI tiI r~ ~0 S/6 0 ~k O EUP IC~ .zoo Y \100''-igg\173-030\Cadd\FINAL PLAT\FINAL PLAT_pe.dwg, 8/17/2006 1:18:19 PM, 1:200 SONVI 0311V-OW 4/L 1S3M.LH80N 3H1 30 3NI1 1S3M (HI80N) Y8 40'£ L9Z M „09,4£.00 N - ,L,LS H,L06i ZS'90£ l _ U m - - - - u ,09'90£1 M „09,4£.00 N " .ZS'90£1 ,00I08 ,ZS'8L9 A f oo D' s o f r o V/ H .04 oil z o V oo r o _ o aA --,80SbS-- oo N D A Ow\ _ m I f r O C~ _a O N 7ACcm cn 01- Zf7 pN1 m V I Z O, N -v N (n I--s D (II (A '1 N m A w I I I Q O N A N O F0 O D m V! 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Parcel 35.29.17.1131 018 - TOWN OF HAMMOND Current X ST. CROIX COUNTY, WISCONSIN Creation Date Historical Date Map # Sales Area Application # Permit # Permit Type 10/27/2006 00 0 Tax Address: Owner(s): O = Current Owner, C = Current Co-Owner O - FRENCH HOMES INC FRENCH HOMES INC PO BOX 350 ROBERTS WI 54023 Districts: SC = School SP = Special Property Address(es): Primary Type Dist # Description " 1918 66TH AVE SC 0231 BALDWIN-WOODVILLE AREA SP 1700 WITC Legal Description: Acres: 3.530 Plat: 11-014-CROIX HILLS 1STADDN 018-06 LOTS9/15 SEC 35 T29N R1 7W PT SW NW FKA OL 2 CROIX Block/Condo Bldg: LOT 010 HILLS NKA CROIX HILLS 1ST ADDN ('06) LOT 10 (3.530AC) Tract(s): (Sec-Twn-Rng 40 1/4 160 1/4) 35-29N-17W SW NW Notes: Parcel History: Date Doc # Vol/Page Type 10/27/2006 837504 PLAT 01/17/2006 816514 WD 10/25/2004 777851 2681/415 WD 05/17/2002 679355 1893/347 WD more... 2008 SUMMARY Bill Fair Market Value: Assessed with: 0 Valuations: Last Changed: 07/19/2007 Description Class Acres Land Improve Total State Reason RESIDENTIAL G1 3.530 30,600 0 30,600 NO Totals for 2008: General Property 3.530 30,600 0 30,600 Woodland 0.000 0 0 I Totals for 2007: General Property 3.530 30,600 0 30,600 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 .TON . ]Hl J 3NI~ lS3M Z M 4405b2.00 N _A7 - 6Z rrl A&(Z 14 z , ,00'09 ,Z5'8l~ o Cur W I W C m 417" C) v O Z 0) 0) U, o (D cn m C.nl il > F C/) ,00 L M ,99,L2.00 N' n -rl ~ Gd N 4-11 cn 114 m z Z Z Cl~ (.n oD p N O cr; u l i o N D .C/) Co. 71 z ~ z No r N . z 07 D 71 _ z - - cn;l: c(n • cS~ j m N ~o W '00.09 L _ °D ~ I W ~ M .,52, L2.00 N 00 Ln LO U) 01--l Va. LO i zcP`\ cn (A i I 71 E ca M z 00 a '0 00 00 46 ~0)° (n i ~I o > 00 N I ~ I LZ, t~.~0 N N Z0,4 00 N Z I~ V' / w t' 00 CO C,4 c l ~ nr. i (A ~ D~ W Wisconsin Department of Commerce SOIL AND SITE EVALUATION Page Of Division of SafAty and Buildings in accordance with Comm 85, Wis. Adm. Code Attach complete site plan on paper not less than 8 '/2 x 11 inches in size. Plan must include, but I County St. Croix not limited to: vertical and horizontal reference point (BM), direction and percent slope, scale or D dimensions, north arrow, and location and distance to the nearest road. Parcel ID # APPLICANT INFORMATION - Please print all information ``y Reviewed By: Date: Personal information you provide may be used for secondary purposes (Privacy Law, s. 15.04(i)(m)). Property owner: Property location Troy French - French Homes Gov't lot: SW 1/4 NW 1/4 S35 T29 N, R17© Property owner's mailing address: Lot # Block # Subd. Name or CSM# P.O. Box 350 ' O NA Croix Hills City / State / Zip Code Phone number: city Village Nearest Road Roberts / WI/ 54023-0350 715-718-2929 Hammond ow 190th St. El New Construction Use ❑ Residential/Number of bedrooms 31.5 Addition to existing building: NA ❑ Replacement ❑ Public or commercial - describe - NA Code Design Flow Rate: 4,725 gallons/day Parent Material: Glacial Till - ground morraine General Comments and Recommendations: Soils are somewhat poorly drained Alfisols underlain by dense glacial till. This is an A+0 mound site. Redox features are the result of perching above and within the dense glacial till. Taxonomic classification: Aquic Glossoboralf 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/FT' BHP Eff# 1 Eff42 1 Ap 0-6 I OYR 3/2 NA sil 2msbk mfr aw 2vf 0.6 0.8 Ground Ap-d 6-11 1OYR 2/2 NA sil impl mfr aw lvf 0.4 0.6 Elev (ft.) Bt 11-15 IOYR 4/4 mld 7.5YR 5/8 sicl 1msbk mfr cw NA 0.2 0.3 92.32 Depth to 2C 15-40 7.5YR 4/4 c2d 7.5YR 5/8 gr scl massive limiting factor- in. 0 Remarks: Bt horizon - very dense Boring # Ap 0-7 1 OYR 3/2 NA sil 2fgr mfr aw 2vf 0.6 0.8 BHP Ap-d 7-9 IOYR 3/2 fld 7.5YR 5/6 sil Impl mfr aw lvf 0.4 0.6 2 Btl 9-11 IOYR 4/4 NA sil 2msbk mfr aw lvf 0.6 0.8 Ground Elev (ft.) Bt2 11 -13 1OYR 4/4 fld 7.5YR 5/8 sicl impl mfr cw tvf 0.4 0.6 97.80 2C 13-35 7.5YR 4/4 m2d 7.5YR 5/6 gr scl massive Depth to limiting factor- in. Remarks: Btl - small amount of clay CST Name: Eli M. Gottfried, Gottfried Environmental Signature: to- llG' Tel. No. 715-833-1400 Address: 124-1/2 Graham Ave. Eau Claire, WI. 54701 Date: 31 May 2006; 15 June 2006 CST # 221981 SOIL DESCRIPTION REPORT $ Property owner French, Troy Parcel 1D# lot 1 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 BHP 3 EMI Eff#2 Ap 0-7 1 OYR 3/2 NA A 2mgr mfr as lvf 0.6 0.8 Ground Elev ft.) Ap-d 7-9 IOYR 3/2 fl d 7.5YR 5/6 A lmpl mfr cw lvf 0.4 0.6 95.80 Btl 9-12 7.5YR 4/4 fld 7.5YR 5/6 A lmsbk mfr gw NA 0.2 0.3 Depth to Bt2 12-18 7.5YR 4/4 m2d 7.5YR5/6 sicl Imsbk mfr limiting aw NA 0.2 0.3 factor- in. 2C 18-38 7.5YR 4/4 C2d 7.5YR 5/8 scl massive 0 Remarks: BtI -clay bridging 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/FV BHP4 EMI E02 Ap 0-7 IOYR 3/2 NA A 2msbk mfr as Ivf 0.6 0.8 Ground Ap-d 7-11 IOYR 3/2 fl d 7.5YR 5/6 A lmpl mfr as lvf 0.4 0.6 Elev (ft.) _ 99.05 Bt l 11-18 1 OYR 4/4 fl d 7.5YR 5/6 A 2msbk mfr cw NA 0.6 0.8 Depth to Bt2 18-20 7.5YR 4/4 m1d7.5YR 5/8 sicl Imsbk mfr gw NA 0.2 0.3 limiting factor- in. 2C 20-35 7.5YR 4/4 C2d 7.5YR 5/8 scl massive 0 Remarks:Bt horizon - Mn and clay bridging Boring # Ap 0-7 I O.YR 3/2 NA sil 2msbk mfr as 1 of 0.6 0.8 BHPS Ap-d 7-9 10YR 3/2 fld 7.5YR 5/6 A 1mpl mfr aw lvf 0.4 0.6 Ground Btl 9-12 7.5YR 4/4 NA A 2msbk mfr gw lvf 0.4 0.6 Elev (ft.) 99.80 Bt2 12-17 7.5YR 4/4 fld 7.5YR 5/6 sicl lmsbk mfr gw NA 0.2 0.3 Depth to 2C 17-28 7.5YR 4/6 m3p 7.5YR 5/8 scl massive limiting factor- in. 0 Remarks: This pit is located on lot 2; BtI horizon has clay bridging Boring # Ap 0-7 l OYR 2/2 NA A lmsbk mfr aw 2vf 0.4 0.6 Pit 6 Ap-d 7-12 1OYR2/2 NA A Impl mfr aw lvf 0.4 0.6 Bt 12-15 l OYR 4/4 m 1 d 7.5YR 5/8 sicl 1 msbk mfr cw NA 0.2 0.3 Ground Elev (ft.) 2C 15-25 7.5YR 4/4 c2d 7.5YR 5/8 gr scl massive 93.80 Depth to limiting factor-in. 0 Hand dug, shallow pit; Btl horizon has clay bridging Boring # Ap 0-7 1 OYR 2/2 NA A 1 msbk mfr aw 2vf 0.4 0.6 Pit 7 Ap-d 7-12 1OYR 2/2 NA sil imp] mfr aw lvf 0.4 0.6 Bt 12-18 1OYR4/4 mId7.5YR5/8 sic] ]msbk mfr cw NA 0.2 0.3 Ground Elev (ft.) 2C 18-22 7.5YR 4/4 c2d 7.5YR 5/8 gr scl massive 93.80 Depth to limiting factor- in. 0 hand boring w/ 5" auger and spade; Ap-d = plow pan Boring # Ap 0-8 10YR 3/2 NA sit 2msbk mfr as 1 of 0.6 0.8 Pit 8 Ap-d 8-10 IOYR 3/2 fl d 7.5YR 5/6 sit lmpl mfr aw lvf 0.4 0.6 Ground Btl 10-13 7.5YR4/4 NA sit 2msbk mfr gw lvf 0.4 0.6 Elev (ft.) Bt2 13-17 7.5YR 4/4 fl d 7.5YR 5/6 sicl lmsbk mfr gw NA 0.2 0.3 99.80 Depth to 2C 17-30 7.5YR 4/6 m3p 7.5YR 5/8 set massive limiting factor- in. 0 BHP 8 is located on lot 4; clay coats in Btl horizon; very dense in 2C 0 X (h~ ° .o o a c E U FEE ~r m= N C/ N O N N V O E CL LUG? o 0)o vino O C no o~Z E cm (D o a) co 0 lLJU)m Ea l- \ ma, u > C .Q m W n a n 0 N 4.5 a A - o CV co cl~ all 0) O L _0 ~ J II g o \ O S a M; 11 I H mi 11 [ V7 ul LLl U O / \ 6 I / I I / / c i J V M N M O J O V7 U~ Q m V' / tl O \ I , ~ I \ A \ i' J I i o \ 0 0 16 I p ~ / / - ` N C C m 3 N m N m> y 3N N C> 7 pINL~ ~'O^.N o y - O I ~t-n~nrv~La°in rn Q.N. L U L F C N tT , O m t/1 N C \ yMCO Nt N m"O L-E J_- _:Ei n C N Y C 8 _ N m U L N d' C d -p O m CU a) E Y u°ti m c~ri o `t Qm 3 \ n y m mm ami c'd-o~ a`~ \ CL N nj n'C co z N C m m m 1~i c 2 \ n 4- 0 Z v ~ L d f HIOO;'iW Z•O o rn o m A ~ A i' Safety and Buildings 13 E SPRUCE STREET commerce.wi.gov CHIPPEWA FALLS WI 54729 tin ■ TDD (608) 264-8777 ' n . www.commerce.wi.gov/sb/ www.wisconsin.gov v epartment of Commerce RECEIVED Jim Doyle, Governor Mary P. Burke, Secretary AU G 17 2006 August 03, 2006 ST. CROIX COUNTY CUST ID No. 42258 Inspector ELI M GOTTFRIED GOTTFRIED ENVIRONMENTAL ZONING OFFICE 124 172 GRAHAM AVE ST CROIX COUNTY SPIA PO BOX 1645 1101 CARMICHAEL RD EAU CLAIRE WI 54702-1645 HUDSON WI 54016 CONDITIONAL APPROVAL PLAN APPROVAL EXPIRES: 08/03/2008 Identification Numbers Transaction ID No. 1275364 SITE: Troy French - French Homes Site ID No. 713333 Town of Hammond, St Croix County Please refer to both identification numbers,` SW 1/4, NW 1/4, 535, T29N, R17W above in all carrps .cadence with the agency- Lots: 1, 2, and 8 Subdivision: Croix Hills Subdivision FOR: Object Type: Soil Saturation Determination Regulated Object ID No.: 1077636 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. If the Interpretive Determination Report was accompanied with a plan and an expiration date is shown on this letter, the expiration date only applies to the plans for the design, not to the decision on the Interpretive Determination Report. The following conditions apply to private onsite wastewater treatment system (POWTS) design and installation: GENERAL CONDITIONS 1. Approval is hereby granted pursuant to s. Comm 85.60(2), Wis. Adm. Code, to estimate the depth to seasonal soil saturation based on an interpretive determination process. Approval of the interpretive determination negates the requirement in s. Comm 85.30(2)(b), Wis. Adm. Code to designate the ground surface as the highest level of soil saturation when redoximorphic features are less than 4 inches below the bottom of the A horizon. 2. The estimated highest level of prolonged soil saturation approved under this determination is six inches below grade. At least 30 inches of sand lift on top of six inches of unsaturated, in-situ soil is required for adequate treatment and dispersal. 3. The basal soil application rate for the mound shall be < 0.20 gpd/sf, and the linear loading rate <4.5 gpd/ft. Down slope toes will be designed using a> 4:1 ratio rather than the traditional 3:1 to ensure more than adequate basal area is available. 4. Distribution cell orifice density shall be < 6 sf/orifice. 5. Chisel plowing to a depth of 12-16 inches immediately prior to sand placement is required to improve vertical water movement into the soil solum. 6. Special landscaping (drainage swale) up slope of the mound and/or of the up slope toe of the mound shall be incorporated into the POWTS design to prevent surface water from concentrating along the up slope edge of the mound and to divert surface water drainage away from the system. 7. This approval shall remain valid unless the site is altered in such a way that the depth to soil saturation would change or if saturated conditions are observed for seven consecutive days at depths less than 3 feet below the infiltrative surface of the POWTS distribution component. l F i INTERPRETIVE REPORT. RECEIVED JUL 3 1 2006 Gottfried Environmental SAFETY & BUILDINGS 124 Graham Avenue Eau Claire, WI. 54701 715-833-1400; 715-833-1381 fax 1275364, for: Troy French French Homes Inc. P.O. Box 350 Roberts, WI. 54023 715-718-2929 Site: SW NW 35 29 17W Croix Hills subdivision Hammond, St Croix County f Table of Contents Table of Contents 1 INTRODUCTION 3 RATIONAL FOR THE INTERPRETIVE REPORT 3 GEOLOGICAL HISTORY 4 DESCRIPTION OF THE SITE 5 Lots 2, 6, 7, 8, 9 5 Locations of Proposed Mounds: 5 Lot 2 ...........................................................................................................s............................ 5 Observations: 5 Lot 2 Discussion: 6 Soil Structure 6 Redoximorphic Features: 6 High Groundwater: 6 Drainage: 6 Lot 6 7 Observations: 7 Lot 6 Discussion: 7 Soil Structure 7 Redoximorphic Features 7 High Groundwater: 7 Drainage: 7 Lot 7 7 Observations: 7 Lot 7 Discussion: 8 Soil Structure 8 Redoximorphic Features: 8 High Groundwater: 8 Drainage:..... ' 8 Lot 8 9 Observations: 9 Lot 8 Discussion: 9 Soil Structure: 9 Redoximorphic Features: 9 High Groundwater: 9 Drainage: 9 Lot 9 9 Observations: 9 Lot 9 Discussion: 10 Soil Structure: 10 Redoximorphic Features: 10 High Groundwater: 10 Drainage: 10 Lots 1, 3, 4 (portion) 10 1 Locations of Proposed Mounds: 10 Lot 1 10 Observations: 10 Lot 1 Discussion: 11 Soil Structure 11 Redoximorphic Features: 11 High Groundwater: 11 Drainage: 11 General Comments Relating to All Four Sites 12 Drainage class 12 Topographic Considerations 12 Local Hydrology 12 Aquic Moisture Regime 13 Tillage 14 EXPLANATION FOR CURRENT SOIL CONDITIONS 14 DISCREPANCIES BETWEEN SOIL TESTS 15 CONCLUSIONS 15 PROPOSALS 16 3. The distribution cell must be designed very long and narrow with a linear loading rate less than or equal to 4.5 gpd/ft. This may limit the number of bedrooms and / or occupancy that can be serviced on the site 16 4. The basal soil application rate must less than or equal to 0.3 gpsqft per day 16 5. At least 2.50 feet of ASTM C-33 sand must be used under the laterals 16 6. Chisel plowing must be employed under the absorption area down to a depth of 12 inches 16 7. Maximum hole spacing in laterals must be 30 inches 16 8. Slopes down-slope of the mound must be 1:4 rather than the traditional 1:3. This increases the toe absorption area 16 9. The area upslope of the proposed SAS must be provided with a constructed waterway to divert water around the mounds, unless the mound is to located at - or near - the crest of the topographic high. The purpose of the waterway will be to prevent water from being trapped in the mounds. Alternatively, the mound can be constructed so that the "J" slope is wider in the center of the mound so that water is diverted to either side 16 REFERENCES 21 2 GOTTFRIED ENVIRONMENTAL 124 Graham Ave., Eau Claire, WI 54701; 715-833-1400 telephone: 715-833-1400; fax: 715-833-1381; email: elicstm(a,sbcglobal.net INTERPRETATIVE REPORT 14 March 2006; Revised 19 July 2006 based on the recommendations of Leroy Jansky, Wastewater Specialist for the State of Wisconsin Proper owner: French Homes Inc. Legal Description: SW NW 35 29 17W Hammond, St. Croix County INTRODUCTION From 1 December to 6 December 2005, soil evaluations were conducted by me on the property described above. The soil evaluations were done in response to a request by the soil tester, Mr. David Steel of Steel Soil Testing Services, in order to determine the suitability f the evaluated lots for the construction of on-site wastewater treatment systems. The sites in question all displayed redoximorphic features within 4 inches of the Ap horizon. This feature, according to Wisconsin Administrator Code, does not allow for the construction of a standard POWTS. Instead, it requires that it be determined that seasonal saturation does not extend into the Ap horizon. It is the intention of the property owner(s), French Homes Incorporated, to subdivide this 40 Acre (approximate) portion of land into 18 lots. Of the 18 lots, 5 have been reviewed as A+0 mound sites. 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 3 r f ~ 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 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." 4 The St. Croix River has its origin in the Northern Highlands and its resistant Precambrian rock. 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 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 SWl/4 of the NW '/4 of Section 35, 29N, R17W, Hammond Township, St. Croix County. All land lays east of 190th Street, and south of County Road J. The proposed subdivision it is composed of an approximately 1400 feet long hill laying approximately East-West. The hill is composed of soils which are primarily silt loam underlain by sandy clay loam glacial till. The hill appears to be a terminal moraine. The evaluated sites are located on the north facing portion of the land area and extend west and slightly north, following the hill slope. Initially there were 5 sites to review. Several more sites, located on the west portion of the hill were added, evaluated and designated suitable for A+0 mounds (see plot plan). Lots 2, 6, 7, 8, 9 Locations of Proposed Mounds: Lot 2 - South portion of the proposed subdivision, bordering 190th Street Lot 6 - North-central portion of lot, approximately 630 feet east of 190th Street Lot 7 - North-central portion of lot, approximately 800 feet east of 190th Street Lot 8 - Central portion of lot, approximately 1000 feet east of 190th Street Lot 9 - South portion of lot, approximately 1200 feet east of 190th Street Lot 2 Observations: Soils as observed: silty loam underlain by sandy clay loam and sandy loam - Typic Glossoboralfs Soils as reported in the literature: Typic Glossoboralfs Slope/Aspect as determined on site: 4% south-southwest. Depth to bottom of Ap horizon: 9 inches Depth to limiting factor: 7 inches Soils in the Ap horizon had moderate structure and many fine roots. Few fine worm channels 5 ~ ~ y I were present in both the Ap and the Bt horizons. Soil colors in the Ap horizon were dark brown (1 OYR 3/2). Soil density became apparent in the C horizon (glacial till parent material) at a depth of 21 inches (approximate). Redox features were faint in the bottom of the Ap horizon. This is designated as Ap-d in the soils report. Soils in this horizon (Ap-d) were platy in structure. E and Bt horizons displayed faint redox features. Redox features increased in intensity, size and frequency as depth increased. No redox features were observed in the root channels or in the worm channels of the Ap horizon. Soils remained moist throughout the profile. No saturation was observed. Lot 2 Discussion: Soil Structure: Soil colors as noted were l OYR 3/2 in the Ap horizon in the area of the proposed drainfield. This suggests that, at least in the Ap horizon, there is not an anoxic soil regimen. The lack of redoximorphic features and the light (1 OYR 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 on lot 2. In the platy Ap-d and E horizons, faint redox features were present. Although platey, the grade was weak, indicating that water movement, would be impeded but not prevented, from moving vertically. No redox features were observed in the upper portion of the Bt horizon. Structure in this area of the profile was moderate blocky. In the lower portion of the Bt horizon, redox features were observed. Structure here was weak. The C horizon was composed of massive sandy clay loam with distinct to prominent redox features. This horizon is geomorphically disconnected from the horizons above (lithologic discontinuity) and represents a glacial till parent material. The soils above are probably of loess origin. Redoximorphic Features: Redoximorphic features were faint in the Ap-d and E horizons, absent in the upper portion of the Bt horizon, and present again in the lower portion of the Bt horizon and in the 2C horizon below. This suggests that there are 2 factors contributing to the presence of redoximorphic features. In the upper layer, the appearance of redox features may be a reflection of poor farming. practices and poor soil stewardship. In the lower horizons, the redox features are a true indicator of seasonal saturation. Redox features in this lower horizon gradually increase in intensity and spatially. This suggests that anaerobic conditions gradually increase in the lower horizons. No redox features were observed in the worm channels or in the root channels in the Ap horizon. High Groundwater: No puddled or massive soils were observed in the area of the proposed SAS on lot 2. However, shallow wet soils were observed in the area of BHP 4, located at an elevation of 92.40' (5 feet lower in the land topography than the proposed SAS). Here, vegetation confirmed the wet soil conditions. In addition, this area was not farmed, indicating poor drainage. This soil pit, located 142 feet downslope of the cell of the proposed A+0 mound displayed redoximorphic features in the Ap horizon. Elevation, therefore, strongly influences the presence of seasonal saturation on this site. Drainage: Drainage in the area of the proposed mound system is moderate. The 4% slope and simple, uniformed slope suggests that there is adequate water movement away from the drainage area. 6 Lot 6 Observations: Soils as observed: silty loam underlain by sandy clay loam and sandy loam - Oxyaquic Glossoboralfs Soils as reported in the literature: Freeon (FoB) - Typic Glossoboralfs (old designation for this soil series) Slope/Aspect as determined on site: 5% north. Depth to bottom of Ap horizon: 8 inches Depth to limiting factor: 6 inches Lot 6 Discussion: Soil Structure: Soil colors as noted were 10YR 2/2 in the Ap horizon in the area of the proposed drainfield. This suggests that, at least in the Ap horizon, there is not an anoxic soil regimen for the 1" 6 inches. The lack of redoximorphic features in the first 6 inches of the Ap horizon in this layer suggests that the soils are not saturated for more than 7 consecutive days. However, the lower part of the Ap horizon (designated Ap-d) was platy and displayed faint to distinct redox features. Structure in the Ap horizon was moderate for all the pits observed on lot 6 at 0 - 6 inches. Structure in the Ap-d and E horizons was weakly platey. Water movement, would be impeded but not prevented, from moving vertically in this horizon. Redoximorphic Features: Redoximorphic features were distinct in the bottom of the A horizon as well as in the Bt horizon and increased in intensity and number the further down the profile. There was a small and discontinuous E horizon on the pits on lot 6. BHP's 1 and 3 lacked the E horizon. Absence of an E Horizon in BHP's 1 and 3 may have been due to plowing. The distinct, continuous redoximorphic features and the increase as one descends in the profile suggests that there is a seasonally high water table on this lot. This, in turn, suggests that anaerobic conditions may exist into the Ap horizon and within 6 inches of the surface during the wetter times of the year. High Groundwater: No puddled or massive soils were observed in the area of the proposed SAS. However, shallow very wet soils were observed in the area of BHP 4, located at an elevation of 94.10' (4.4 feet lower in the land topography than the proposed cell of the SAS). Here, vegetation confirmed the wet soil conditions. This soil pit, located 110 feet downslope of the cell of the proposed A+0 mound displayed redoximorphic features in the Ap horizon. Elevation, therefore, strongly influences the presence of seasonal saturation on this site. Drainage: Drainage in the area of the proposed mound system is moderate. The 5% slope and simple, uniformed slope suggests that there is adequate water movement away from the drainage area for a part of the year. Lot 7 Observations: 7 Soils as observed: silty loam underlain by sandy clay loam and sandy loam - Oxyaquic Glossoboralfs Soils as reported in the literature: Freeon (FoB) - Typic Glossoboralfs (old designation for this soil series) Slope/Aspect as determined on site: 5% north-northwest Depth to bottom of Ap horizon: 9 inches Depth to limiting factor: 6 inches Lot 7 Discussion: Soil Structure: Soil colors as noted were IOYR 3/2 in the Ap horizon in the area of the proposed drainfield to a depth of 6 inches. This suggests that, at least in the Ap horizon, there is not an anoxic soil regimen. The lack of redoximorphic features and the light (I OYR 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 the 3 pits observed on lot 7. Structure was weak in the platy Ap-d horizon from 6 to 9 inches. No E horizon was observed. The E horizon may have been eliminated as a result of plowing. No localized compaction (as a result of wheel traffic) was observed at the 0 to 6 inch depth. This may be a reflection of tillage. Evidence of compaction due to wheel traffic was evident in the platy Ap-d horizon. Density in the C horizon (parent material - glacial till) was observed, as was distinct to prominent redoximorphic features. Redoximorphic Features: Redoximorphic features were faint to distinct in the Ap-d horizon, distinct in the Bt horizon, and prominent in the lower part of the Bt horizon and the massive 2C horizon. This suggests that there is a gradual increase in the amount of time that water remains at a given depth. This, in turn, suggests that anaerobic conditions gradually increase as one descends down the profile. The presence of redox features in the Ap-d horizon and the continuous nature of the redox features descending down the profile suggest that seasonal saturation may be a factor on this site extending up to (and perhaps including) the Ap horizon. However, no redox features were observed in the worm channels or in the root channels in the Ap horizon. A High Groundwater: No puddled or massive soils were observed in the area of the proposed SAS. However, shallow wet soils were observed in the area of BHP 4, located at an elevation of 93.80' (4.3 feet lower in the land topography than the proposed SAS cell). Here, vegetation confirmed the wet soil conditions. This soil pit, located 100 feet downslope of the cell of the proposed A+0 mound, displayed redoximorphic features in the Ap horizon. Elevation, therefore, strongly influences the presence of seasonal saturation on this site. Drainage: Drainage in the area of the proposed mound system is moderate. The 5% slope and simple, uniformed slope suggests that there is adequate water movement away from the drainage area. 8 Lot 8 Observations: Soils as observed: silty loam underlain by sandy clay loam and sandy loam - Typic Glossoboralfs Soils as reported in the literature: Freeon (FoB) - Typic Glossoboralfs Slope/Aspect as determined on site: 6% north-northeast. Depth to bottom of Ap horizon: 8 inches Depth to limiting factor: 8 inches Lot 8 Discussion: Soil Structure: Soil colors as noted were 10YR 3/2 in the Ap horizon in the area of the proposed drainfield. 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 on lot 8. No E Horizon was present in BHP's 2, 3, and 4, probably as a result of deep plowing. In BHP 1 an E horizon was present. This horizon had a characteristic platey structure. The structure was weak, allowing for water movement. Overall, structure in the A horizon for all the its appeared to be unaffected b P Y plowing, displaying good structure and observable macropores. There was also evidence of biological activity - worm channels and extensive roots in the Ap horizon. Field traffic (farm machinery) did not appear to have compacted soils or destroyed structure in the area of the proposed mound. No puddled or massive soils were observed in the area of the proposed SAS, in spite of the tendency for fine-textured soils that have been plowed to puddle. Redoximorphic Features: Redoximorphic features were distinct, although few, in the horizon immediately below the Ap horizon. Intensity and number of redox features increased lower in the soil profile in each of the pits, suggesting a gradual increase in the amount time that water remains at a given depth. This, in turn, suggests that anaerobic conditions gradually increase in the lower horizons. No redox features were observed in the worm channels or in the root channels in the Ap horizon. High Groundwater: Shallow wet soils were observed in the area of BHP 4, located at an elevation of 94.50' on Lot 9. This pit was approximately 95 feet north of the 98.70 contour line. Here, vegetation confirmed the wet soil conditions. Elevation, therefore, strongly influences the presence of seasonal saturation on this site. Drainage: Drainage in the area of the proposed mound system is moderate. The 6% slope and simple, uniformed slope suggests that there is adequate water movement away from the drainage area. Lot 9 Observations: Soils as observed: silty loam underlain by sandy clay loam and sandy loam - Oxyaquic Glossoboralfs Soils as reported in the literature: Freeon (FoB) - Typic Glossoboralfs (older designation - currently designated as Oxyaquic Glossoboralf). Slope/Aspect as determined on site: 5% north-northeast. 9 Depth to bottom of Ap horizon: 7 inches Depth to limiting factor: 7 inches Lot 9 Discussion: So 11 Structure: Soil colors as noted were IOYR 2/2 in the Ap horizon in the area of the proposed drainfield. This suggests that this may be a wet area and that drainage is poor. Structure in the Ap horizon was moderate for all the pits observed on lot 9. Only the Backhoe pit designated as BHP 1 displayed an E horizon. In the E horizon platey structure was observed, although the platyness was weak. This suggests that water movement, would be impeded but not prevented, from moving vertically. Neither BHP2 nor BHP 3 showed an E horizon. This is most likely due to the degree and depth of plowing. No puddled or massive soils were observed in the area of the proposed SAS. Redoximorphic Features: Redoximorphic features were faint to distinct in the Ap and Bt horizon and increased in intensity and number the further down the profile. This suggests that there is a gradual increase in the amount time that water remains at a given depth. This, in turn, suggests that anaerobic conditions gradually increase in the lower horizons. Redox features were observed in the worm channels and the root channels in the Ap horizon. High Groundwater: Shallow wet soils were observed in the area of BHP 4, located at an elevation of 94.50' on Lot 9. This pit was approximately 95 feet north of the 98.70 contour line. Here, vegetation confirmed the wet soil conditions. Elevation, therefore, strongly influences the presence of seasonal saturation on this site. Drainage: Drainage in the area of the proposed mound system is moderate. The 5% slope and simple, uniformed slope suggests that there is adequate water movement away from the drainage area. Lots 1, 3, 4 (portion) Locations of Proposed Mounds: Due to the unsuitability of lots 6, 7, 9 for mound systems, lot 1 and a portion of lot 3 and 4 has been designated for construction of mound systems. These mounds will service the residences to be located on lots 6, 7, 9. See accompanying plot plan. Lot 1 Observations: Soils as observed: silty loam underlain by sandy clay loam and sandy loam - Typic Glossoboralfs Soils as reported in the literature: Typic Glossoboralfs Slope/Aspect as determined on site: 4% to 4.5% north-northeast. Depth to bottom of Ap horizon: 9-11 inches Depth to limiting factor: 7 inches Soils in the Ap horizon had moderate structure and many fine roots. Few fine worm channels 10 were present in both the Ap and the Bt horizons. Soil colors in the Ap horizon were dark brown (IOYR 3/2). Soil density became apparent in the C horizon (glacial till parent material) at a depth of 18 inches (approximate). Redox features were faint in the bottom of the Ap horizon. This is designated as Ap-d in the soils report. Soils in this horizon (Ap-d) were platy in structure. Bt horizons displayed faint redox features. Redox features increased in intensity, size and frequency as depth increased. No redox features were observed in the root channels or in the worm channels of the Ap horizon. Soils remained moist throughout the profile. No saturation was observed. Lot 1 Discussion: Soil Structure: Soil colors as noted were IOYR 3/2 in the Ap horizon in the area of the proposed drainfield. This suggests that, at least in the Ap horizon, there is not an anoxic soil regimen. The lack of redoximorphic features and the light (10YR 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 on lot 1 and proposed mounds associated with lot 1 (pits on lots 2, 3, 4). In the platy Ap-d horizon, faint redox features were present. Although platey, the grade was weak, indicating that water movement, would be impeded but not prevented, from moving vertically. No redox features were observed in the upper portion of the Bt horizon in several pits. Structure in this area of the profile was moderate blocky. In the lower portion of the Bt horizon, redox features were observed. Structure here was weak. The C horizon was composed of massive sandy clay loam with distinct to prominent redox features. This horizon is geomorphically disconnected from the horizons above (lithologic discontinuity) and represents a glacial till parent material. The soils above are probably of loess origin. Redoximorphic Features: Redoximorphic features were faint in the Ap-d horizon where present, absent in the upper portion of the Bt horizon, and present again in the lower portion of the Bt horizon and in the 2C horizon below. This suggests that there are 2 factors contributing to the presence of redoximorphic features. In the upper layer, the appearance of redox features may be a reflection of poor farming practices and poor soil stewardship. In the lower horizons, the redox features are a true indicator of seasonal saturation. Redox features in this lower horizon gradually increase in intensity and spatially. This suggests that anaerobic conditions gradually increase in the lower horizons. No redox features were observed in the worm channels or in the root channels in the Ap horizon. In profiles where structure remained moderate subangular blocky, redox features appeared gradually starting with faint features in the upper part of Bt horizon. This indicates that the Ap horizon is aerated and that anaerobic conditions begin gradually and increase as one descends down the soil profile. High Groundwater: No puddled or massive soils were observed in the area of the proposed SAS's on lot 1. Drainage: Drainage in the area of the proposed mound systems is moderate. The 4% slope and simple, uniformed slope suggests that there is adequate water movement away from the 11 drainage area. General Comments Relating to All Four Sites Drainage class: The soil survey manual notes that the drainage class for the soils on this site is "moderately well-drained." In agricultural terms, this is defined as "Soils that have periods of excessive wetness that adversely affect planting or harvesting operations or that reduce yields of some field crops." However, fields classified as moderately well drained are still capable of producing significant crop yields. This site has been used for corn production, indicating that the soils drain well enough for cultivation during a part of the year. No artificial drainage is used on this site. The areas established as mound sites all had grown corn in previous years. Non-agricultural definitions for drainage class deal with depth to high groundwater. The Soil Science Manual from the University of Minnesota (Burgess Publishing) defines moderately well drained as depth to high groundwater of greater than 3 feet. It further states "No mottles in the upper B horizon, gray mottles in lower B." All designated mound sites were free of gray redox features within 4 inches of the Ap horizon. No standing water was observed in the backhoe pits. The soils described in the areas of the proposed A+0 mounds are located in the highest or close to the highest points on the land on the north and northeast portion of the proposed subdivision. Therefore, they are elevated above a permanent water table. It should be noted that the drainage class designation is based on slopes as well as depth to groundwater and textural classes. Thus, it is possible to have a site located on a high point on the landscape, have poor texture and structure, but have a "well-drained" classification if slopes are steep enough. Topographic Considerations: All proposed mound sites are located on either convex or straight slopes. None of the 6 A+0 sites (lot 2, 4 on lot 1, lot 8) are located on concave slopes or in waterways. Therefore, they are not located in areas where water can congregate. In addition, no sites are located in designated wetlands. Local Hydrology: As noted on the accompanying plot plans, the proposed dispersal sites have slopes ranging from 4% to 6%. Local waterways exists on the property, although not in the area of the proposed A+0 mounds. The Rush River flows north-south and lays approximately 1 mile east of the proposed subdivision. The Kinnickinnic River is approximately 2 miles west of the site and flows approximately east-west. Subsurface regional flow (groundwater flow) is most likely west towards the St. Croix River. On-site observations agree with the site description as noted in the NRCS publication, Soil Survey of St. Croix County, Wisconsin (USDA publication) and the soil data reported on the web site http://websoilsurvey.nres.usda.gov. Soils are classified as Typic Glossoboralfs in the Soil Survey published in 1972. However, the NRCS has redesignated these soils as Oxyaquic Glossoboralfs. Typic 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 12 features). Oxyaquic Glossoborlafs have a similar profile to the Typic soils, but are darker in the Ap horizon and have an Aquic moisture regime. 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). The publication notes that this soil type "consists of gently sloping and sloping, moderately well- drained soils." The publication goes on further to describe the lower part of the profile as becoming "saturated with water for long periods of time." Although not observed, significant redox features in the lower part of the subsoil indicate that this is a saturation does take place at some time during the year and that this condition persists for extended periods of time. Aquic Moisture Regime: "Keys to Soil Taxonomy" (6`h Edition, 1994) notes that "The Aquic moisture regime signifies a reducing regime in a soil that is virtually free of dissolved oxygen because it is saturated by groundwater or by water of the capillary fringe." The text continues, "It is not known how long a soil must be saturated to have an Aquic moisture regime, but the duration must be at a least a few days because it is implicit in the concept that dissolved oxygen is virtually absent. Because dissolved oxygen is removed by respiration of micro- organisms, roots, and soil fauna, it is also implicit in the concept that the soil temperature is above biologic zero for some time while the soil is saturated." In another portion of the publication, 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 characteristic of organic soils (1 OYR 2/2). As noted previously, the placement of the A+0 mounds are on the highest or near the highest grounds on the site. Therefore, a high water table is not an issue on these sites. In addition, the mounds are sited on sloping sites, away from areas of water congregation. The presence of a capillary fringe, common where there is a large discrepancy between hydraulic conductivities between horizons (typically, coarse textured soil overlain by a much finer textured soil) is not found on these sites. Biological activity appears to be high as evidenced by the number of root channels and worm channels. Oxygen depletion appears not to be a phenomenon in the upper horizons as indicated . 13 by the lack of reduced or oxidized areas in the channels. Tillage: Tillage can both aerate soil and cause anoxic conditions in the soil. In the short term, tillage will break up soil clumps, freeing trapped nutrients and exposing more of the soil to the air. This, in turn, will cause more breakdown of organic material. In the long run, tilling the soil will break soil peds and destroy soil structure, thus destroying macropores that will contribute to aeration and water infiltration. In addition, the physical action of moving a heavy piece of machinery across the land, especially in wet weather, will compact fine-textured soil. The soils on site appear not to have been negatively impacted by tilling. On all proposed parcels, the soils of the epipedon were moderate structured, subangular blocky, indicating that tillage had not adversely affect the structure. As noted in the soil reports and in the body of this report, subsoils were present which had platy structure. In some cases, the platyness was due to natural causes (resulting in an E horizon). In some cases, the plantiness was found in the lower part of the A horizon (Ap-d), suggesting that this was the result of plowing (plowpan or plowsole). EXPLANATION FOR CURRENT SOIL CONDITIONS The proposed subdivision lays on a hill which lays in a general east-west direction. Slopes are approximately 5 to 8% throughout. Given the size, slope, aspects and underlying parent material, the subdivision appears to be part of a terminal moraine. During the many days that I have worked on this site, there has always been a moderate to strong wind from the southwest to the northeast. This is not unusual, since the majority of our weather pattern is the result of prevailing westerly winds with either moisture being carried from the south to the north (low pressure) or arctic winds (high pressure) coming from the northwest. These winds, as well as the relatively direct exposure of the south slope to the sun, may account for a more well developed soil profile on the south face of the moraine as opposed to the north face of the moraine. This, in turn, may account for more A horizon on the south slope relative to the north facing slope. Farm practices may also play a role in the soil development on this site. If a more southerly exposure has resulted in more soil development and an earlier warm-up of soil on the south facing slope, then these soils are less prone to "damage" from tillage at an earlier time in the spring than the soils on the north-facing slope. It is generally accepted that fine-textured soils are more prone to structural damage if plowed when wet or frozen. To prevent this, a different planting schedule would have to have been implemented on this site so that the south slope was plowed and seeded at least a week or 2 before the north face. Alternatively, the north facing slope should have been minimally tilled. These practices were not used on this site. As a result, soils on the north face are shallower with less structure than the soils on the south face. However, as the slope is directed more in a southerly or westerly direction, as in the case of lot 1, soils are more closely aligned with the soil forming factors and environmental conditions of the south facing slope. Thus lot 1 has soils which are more well-developed than lot 9. This being said, lot 1, as well as lot 8, display soil conditions that will require additional fill and 14 specialized geometry to accommodate the limitations in the soil. These sites have soils that have a compacted lower Ap horizon (Ap-d) which is weakly platey. This Ap-d horizon, unlike the soils further east, does not display distinct redoximorphic features. Some faint 7.5YR 5/6 redox features were observed, but these features were not continuous with redox features in the lower portion of the soil profile (horizons Btl and Bt2). The platiness may be related to the effects of farm machinery. Structure below the Ap-d horizon is moderate blocky with few redoximorphic features. As noted on the accompanying soil tests, it is proposed that lot 1 be used to support 4 mounds. These mounds will service lots 9, 7, 6, and 1. Lot 2 will have its own mound system, as will lot 8. It is not readily apparent why lot 8 has more well-developed soil than the soils found on lots on either side of it. Soils in the area of lot 1 appear suitable for mound types of septic systems, albeit with A+0 soil horizons. As one moves east on the north portion of the slope, soils become less suitable to support mound systems. Soils on lots 6, 7, and 9 are unsuitable for any type of on-site septic system. Soils on lot 8 appear suitable for a mound system. All lots on the south slope of the proposed subdivision are suitable for mounds. DISCREPANCIES BETWEEN SOIL TESTS Where soil tests were done by me, Mr. David Steel and Mr. Leroy Jansky, differences may exist in the report of soil features. These differences may be related to the time of year when the tests were conducted (summer versus winter), time of day (morning versus afternoon), observer interpretation, angle of pit. In the case of the evaluations made by me versus Mr. Steel, the final evaluations made by me on this site were conducted in June. Soils were dry and free of frost. Lighting was good. Due to time constraints placed on Mr. Steel, many of his evaluations had to be conducted during the late fall when the angle of the sun was not ideal and the soils were cold. CONCLUSIONS A combination of cultural (i.e. farming practices) and environmental factors may have been at work in the creation of soil conditions found on this proposed subdivision. However the soils developed though, it is apparent that soils on lots 6, 7, and 9 are unsuitable for mound type of septic systems. No redoximorphic features were observed for at least 9 inches of the Ap horizon in any of the pits evaluated. The soils in this upper 9 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. 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 9 inches (faint) and increasing in intensity (prominent) at lower depths. The faint redox concentrations may have been accompanied by redox depletions in the macropores although this was not observed. Slopes in all the proposed A+0 sites were gentle and either convex or straight. The A+0 mounds were not located on concave slopes. Water movement will be away from the mounds and will radiate outward. 15 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 systems must be in the area designated on the plot plans. 2. Areas lower in the landscape must not be used for soil absorption systems. 3. The distribution cell must be designed very long and narrow with a linear loading rate less than or equal to 4.5 gpd/ft. This may limit the number of bedrooms and / or occupancy that can be serviced on the site. 4. The basal soil application rate must less than or equal to 0.3 gpsqft per day 5. At least 2.50 feet of ASTM C-33 sand must be used under the laterals 6. Chisel plowing must be employed under the absorption area down to a depth of 12 inches 7. Maximum hole spacing in laterals must be 30 inches. 8. Slopes down-slope of the mound must be 1:4 rather than the traditional 1:3. This increases the toe absorption area. 9. The area upslope of the proposed SAS must be provided with a constructed waterway to divert water around the mounds, unless the mound is to located at - or near - the crest of the topographic high. The purpose of the waterway will be to prevent water from being trapped in the mounds. Alternatively, the mound can be constructed so that the "J" slope is wider in the center of the mound so that water is diverted to either side. If you have any questions regarding this report, please feel free to contact me at the above address and/or telephone number. Sincerely, -6, 'W A Eli M. Gottfried Registered Sanitarian (80806), CST (221981), Licensed Designer (1310) I 16 r yi i,''if-~F' ~°seC•~ '~yk:- r ,f ..n m ~Y7 r r.} ' tart. ~ rt r }t t .4 i s « j fix 4n c'C r $r r' ~ ~ XX Attachment 1 - Aerial map for the French Homes Inc development. Arrow points to approximate locations of mounds on lots 2, 6, 7, 8, 9. 17 -'fit y ' f• / T 1 ~ _ - i 4• .t. l .S.S 140 _ r;rf i fJ i Attachment 2. Topographic map showing the approximate locations of the sites. Note that none of the sites lay in a waterway or in an area of converging slopes. In addition, no designated wetlands are evident on the map. 18 French Homes - Sample mound plan view with linear loading rate of 4.5 for a 4 bedroom residence Dimensions and Footprints for gravel, sand, and fill i fill X ft. sand Gravel Area U ft. W ft. I. Bed (Cell): Dimensions: 133 ft. x 4.5 ft. Sand: x = 8.82 ft. (based on 3:1 slope) w = 16.44 ft (based on 4:1 slope) u = 10.12 ft (based on 3:1 slope) Overall sand footprint = 170.23 ft x 29.26 ft Volume of sand: 623 cubic yards. THIS VOLUME IS FOR ESTIMATING PURPOSES ONLY. Fill: J = 10.16 ft. I =18.82 ft. V = 13.12 ft. Overall fill footprint = 166.88 ft. x 32.98 ft. Installer: Sand amount is an estimate only. Please check this figure and compare it to similar sites that you are familiar with. 19 GOTTFRIED ENVIRONMENTAL Diversion Ditch - Sample C B 1311 -radient to blend into - - - Z atural landscape S T W X -Y o B B B 5:1 slope all around ditch except stormwater outlet from ditch. Stormwater to be diverted around south end of mound soil absorption system. DIVERSION DITCH DETAIL NOTE THAT THIS DIAGRAM REPRESENTS/20F THE DRAINAGE DITCH A= 1 ft. B=5ft. C=80 ft. D = 1 ft. Grade Elevations: Trench Elevations: S=104.90 ft. S=103.06,A=1.Oft,B=13.75 ft,D=1.84 ft. T = 104.90 ft. T = 103.23 ft. W = 104.90 ft. W = 103.40 ft. X = 104.90 ft. X = 103.56 ft. Y = 104.90 ft. Y = 103.73 ft. Z = 104.90 ft. Z = 103.90 ft., A = ].Oft., B = 5.0 ft, D = 1.0 ft. The bottom of the trench should be smoothed so that water flows evenly from the center to the end. Total drop from the center of the diversion ditch to the end is 10 inches. Drop is 1/8" per ft. 20 REFERENCES 1. Brown, B.A. (1988) Bedrock Geology of Wisconsin, University of Wisconsin- Extension, Madison Wisconsin. 2. Keys to Soil Taxonomy (1994) 6 h Edition. Soil Survey Staff, U.S. Department of Agriculture. Pocahontas Press, Inc. Blacksburg, Virginia. 3. Martin, L. (1965). The Physical Geology of Wisconsin. University of Wisconsin Press, Madison, Wisconsin 4. Paull, R.K. and Paull, R.A. (1977) Geology of Wisconsin and Upper Michigan. Kendall/Hunt Publishing Company, Dubuque, IA. 5. National Audubon Society Field Guide to North American Trees (Eastern Region): (1998) Chanticleer Press Inc., NY, NY 6. 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. 7. Soil Survey Staff, U.S. Department of Agriculture (1994) Keys to Soil Taxonomy Sixth Edition, United States Department of Agriculture, Soil Conservation Service. Pocahontas Press Inc., Blacksburg, Virginia. 21 ~'01 IiIIr+efueml.quv SAFETY AND BUILMNCS DIVISION' Integrated Services Bureau 13 East Spruce Street +~++Onsn INSPECTION REPORT Chippewa Falls, w1-54729 www.commerce.wi. ov/sb tile0artment of Commerce (715) 726 2544 Date of Inspection: June 7, 2006 Plumber Name and Address: Project Name: French NA Use: Residential Legal Description: SW, NW, 35, 29, 17W Site Number: 713333 Subdivision: Croix Hills Soil Tester Name and Address: Municipality: Town of Hammond Ii M. Gottfried, CST 42258 County: St. Croix O Box 1645 au' Cla re, WI 54702-1645 Plan Transaction Number: 12753 171roy Sanitary Permit Number: NA ame and Address: French Wastewater Flow: 300-600 gpd PO Box 350 Persons Present: Owner, E. Gottfried, D. Roberts, WI 54023 Steel, R. Yarrington 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. Soil data verified is as follows: BHP-4 00-07"_ 10YR 3/2 sill-2csbk. mfr,_aw.___ 07-11" 10YR 3/3 sil, 2msbk parting to pl, mfr, as, w/ f1d 5YR 4/6 rmfs. 11-19" 10YR 4/4 sil, 2msbk, mfr, cw, w/ c3d 10YR 5/3 and 5/6 rmfs. 19-24" 7.5YR 4/4 sl, 1 msbk, mfr w/c3d 7.5YR 5/6 and 10YR 5/3 rmfs. BHP-1 00-05" 10YR 3/3 sil, 2msbk, mfr, aw. 05-09" 10YR 3/3 sil, 2csbk, mfr, as, w/ f1 d 5YR 4/6 rmfs. 09-12" 10YR 4/4 sil, 2mpl, mfr, cw, w/ c2f 10YR 5/3 and 5/6 rmfs. 12-16" 10YR 4/4 sil, 2msbk, mfr w/. c2f 10YR 5/3 and 5/6 rmfs. BHP-1A 00-08" 10YR 3/3 sil, 2csbk, mfr, cw. 08-09" 10YR 3/2 sil, 2fpl, mfr, as, w/ f1 d 5YR 4/6 rmfs. 09-13" 10YR 4/2 sil, 2mpl, mfr, cw, w/ c2d 10YR 5/3 and 5/6 rmfs. 13-18" 10YR 4%3 sil, 2m-cpl, mfr, cw, w/ f2d 10YR 5/3 and 5/6 rmfs. 18-24" 10YR 4/3 sil, 2msbk, mfr w/. f2d 10YR 5/3 and 5/6 rmfs. BHP at intersection_ of Lots 1. 2 and 3 13, /Z) Similar to BHP-4 c3d Fe conc in the lower A horizon. Five to six inches of A horizon w/o rmfs. Subsoil below the A horizon has has rmfs. Page 2 of 2 June 7, 2006 Troy French site Lot 8 On lot 8 at a location approximately midpoint along the proposed system contour and 15 ft up slope conditions were noted to be acceptable to a depth of 15 inches (0-8" 10YR 3/3 sil, 8-15" 7.5YR 4/4 grscl with no rmfs). Lot 9 On lot 9, on the far west end of the proposed system contour the upper 7 inches of the A horizon had no rmfs but the lower 3 inches did have rmfs as Fe concentrations. The subsoil was a 10YR 4/4 scl with f2f 10YR 516 rmfs. The east side of lot 8 might be used for part of the system for lot 9. Lots 10. 12,14, and 16 'dad k, A, Soil conditions on the north side of the proposed subdivision were.also reviewed, although this area is not part of the interpretative determination for lots 1-9. The pits;evaluated all had greater.than A+4 conditions. Briefly, lot 10 had A+6", lot 12 had A+16", lot 14 had A+ 11", and lot 16 had A+10". General The use of a common off lot (lot 1) area for installation of a common mound or separate mounds would be acceptable with county approval (for a common system). Other sites appear acceptable for long and narrow mounds with appropriate depths of sand fill. Final landscaping should be as per the recommendations of the certified. soil tester so that surface and. near surface groundwater water does not interfere with proper mound operation. Mound locations on lots 8 and 9 need to be worked out carefully since the east part of lot 9 is not suitable for a mound. Soil application rates for those sites with A+0 conditions should be 0.2 gpd/ft^2 and linear loading rates should be no more than 4.5 gpd/ft. If there are any questions regarding this report, please contact me. Loy-G-. sky,_W er-Sp list cc: ousty__ Ljansky@ ommerce.state.wi:us E-mail ST ❑ O Owner ❑ Owner e~ 715/726-2544 Voice 715/726-2549 Fax ❑ Other