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HomeMy WebLinkAbout002-1029-20-000 r P Safety and Buildings 13 E SPRUCE STREET commerce.Wl.gov CHIPPEWA FALLS WI 54729 Contact Through Relay isconsin www.commerce.wi.gov/sb/ www.wisconsinsingov Department of Commerce Jim Doyle, Governor Richard J. Leinenkugel, Secretary September 17, 2009 CUST ID No. 30021 ATTN: POWTS Inspector JAMES K THOMPSON ZONING OFFICE A.C.E. SOIL AND SITE EVALUATIONS ST CROIX COUNTY SPIA 340 PAULSON LAKE LN 1101 CARMICHAEL RD OSCEOLA WI 54020 HUDSON WI 54016 CONDITIONAL APPROVAL PLAN APPROVAL EXPIRES: 09/17/2011 Identification Numbers OoZ -/az 9- /0'doo Transaction ID No. 1688798 W SITE: Vriezland 11 LLC Existing 36.8 Acre Parcel Pleas s Site I De 749818 Cth E & 250TH St e refer to both identification numbers, above, in all correspondence with the agency. Town of Baldwin, St Croix County SW 1/4, NW 1/4, S14, T29N, R16W FOR: Object Type: Soil Saturation Determination Regulated Object ID No.: 1233852 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. Only those object types listed above have been approved; other submittals such as plumbing and those listed below under Also Submit, may be required. The following conditions shall be met during construction or installation and prior to occupancy or use: 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 6-13 inches below grade. At least 30 inches of sand lift on top of 6 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. 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. 5. Landscaping up slope 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. 6. 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. 7. 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. 8. A copy of this approval letter and attachments must accompany the mound system design for this site for purposes of plan approval and sanitary permit issuance. 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. JAMES K THOMPSON Page 2 9/17/2009 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. Any local requirements shall be complied with. This plan has not been generally reviewed for compliance with fire code requirements, including those for fire lanes and fire protection water supply, so contact the local fire department for further information. In granting this approval, the Division of Safety & Buildings reserves the right to require changes or additions, should conditions arise making them necessary for code compliance. As per state stats 101.12(2), nothing in this review shall relieve the designer of the responsibility for designing a safe building, structure, or component. The Division does not take responsibility for the design or construction of the reviewed items. 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 $ 240.00 Fee Received $ 240.00 Balance Due $ 0.00 Leroy Gky, RPSS, P WS Was ater Specialist Integrated Services Bureau WiSMART code: 7633 (715)726-2544, Friday, 7:00 a.m. To 3:30 p.m. leroy.jansk-y@wisconsin.gov SAFETY AND BUILDINGS DIVISION corn merce.wi.gov , Integrated Services Bureau 13 East Spruce Street INSPECTION REPORT Chippewa Falls, WI 54729 www.commerce.wi.gov/sb i s c o n sin (715) 726-2544 Department of Commerce Richard J. Leinenkugel, Secretary Date of Inspection: July 9, 2009 Plumber Name and Address: Project Name: Vrieze Unknown at this time. Use: Residential Legal Description: SW, NW, 14, 29, 16W Site Number: 749818 Subdivision: Vriezkland II Certified Soil Tester Name and Address: Municipality: Town of Baldwin James K. Thompson, CST 3602 County: St. Croix 340 Paulson Lake Lane Osceola, WI 54020 Plan Transaction Number: 1688798 Sanitary Permit Number: na Owner Name and Address: John Vrieze (Vriezland II, LLC) Wastewater Flow: 450-600 gpd 110 E. Third St. Persons Present: Jim Thompson New Richmond, WI 54017 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. Near CST B-2 the soils conditions were found to be as follows: 00-04" 10YR 3/2 sil, 2mgr, dsh, aw. 04-07" 10YR 5/3 sil, 2msbk parting 1fpl, dsh, as. 07-16" 10YR 5/3 sil, 2msbk, dsh, cw, w/f3f 10YR 5/6 rmfs. 16-24" 5YR 4/4 sl till, 1csbk, dh, w/c3d 7.5R 5/8 and 6/2 rmfs. 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 4.5 gpd/ft and the basal wastewater application rated should not exceed 0.2 gpd/ftz. In addition, on sites with slopes less than 3 percent, the down slope toe slope ratio should be increase to more than 3:1. 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 required 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. If there are any questions regarding this report, please contact me. Leroy G. Jansky, PSS, Wastewater Specialist cc: ❑ County ❑ Plumber Ieroy.jansky(cDwisconsin.gov E-mail ❑ CST ❑ Owner 715/726-2544 Voice 715/726-2549 Fax ❑ Other 2163 Wisconsin Department of Commerce SOIL EVALUATION REPORT ~e..r ._....Tpage 1 of 4 Division of Safety and Buildings in accordance with Comm 85, Wis. Adm. Co~ A.C.E. Soil & Site Evaluations Attach complete site plan on paper not less than 8'/2 x 11 inches in size. Plan must County i O~ St. Croix include, but not limited to: vertical and horizontal reference point (BM), direction and r1 percent slope, scale or dimensions, north arrow, and location and distance to nearest road. U at I.Duk)N pfF01~1029-10 -000 Please print all information. `~%i gy Date Personal information you provide may be used for secondary purposes (Privacy Law, s. 15.04 (1) (m)). ~y Property Owner Property Location Vriezland II, L.L.C. - John Vrieze Govt. Lot SW 1/4 NW 1/4 S 14 T 29 N R 16 W Property Owner's Mailing Address lot # Block # Subd. Name or CSM# 110 East Third Street Existing 36.87 Acre Parcel City State Zip Code Phone Number I City J Village 0 Town Nearest Road New Richmond WI 54017 (612) 750-8203 Baldwin Co. Hwy. E ,r New Construction Use: Residential / Number of bedrooms 3 Code derived design flow rate 450 GPD J Replacement J Public or commercial - Describe: Parent material Glacial Till Flood plain elevation, if applicable Na General comments and recommendations: Site meets requirements for approval of A+0" mound as field verified by Onsite Wastewater Specialist Leroy Jansky 7/09/09. See Interpretive Report for design recommendations a Boring # I Boring V1 Pit Ground Surface elev. 98.72 ft. Depth to limiting factor 13" in. Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots GPD/ft' in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 1 0-6 10yr3/2 none sil 2fgr ds as 2fmc 0.6 0.8 2 6-13 10yr4/4 none sil 2fsbk ds cs 2fmc 0.6 0.8 F54 13-17 10yr5/4 f2f 7.5yr5/8 sil 1 msbk dsh cw 2fm 0.4 0.6 17-26 7.5yr4/6 m2d 7.5yr5/8 sl 1msbk mfr cw 1f 0.4 0.7 26-41 7.5yr4/4 m2d 7.5yr5/8 sl 1 csbk mfr - 1 f 0.4 0.7 H#2 parts to 1thinpl when disturbed. Boring # J Boring f~ Depth to limiting factor in. Soil Application Rate Pit Ground Surface elev. 98.49 ft. Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots GP5-1w in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 1 0-4 10yr3/2 none sil 2fgr ds as 2fmc 0.6 0.8 2 4-6 10yr5/3 none sil 2fsbk ds cs 2fmc 0.6 0.8 [q521 6-14 10yr5/4 f2f 7.5yyrr5/8 sil 2fsbk dsh cw 2fm 0.6 0.8 14-21 7.5yr4/6 m2f10yrrr6/2& fsl 1msbk mfr cw 1f 0.2 0.6 -38 7.5yr4/4 mm2d 1yy0yr/6/2& sl Om mfr - if 0.2 0.6 H#2 parts to 1thinpl when disturbed. S' coats observed on ped faces in H#3 & 4. 10yr6/2 sand grains observed on cleavage plains in H# 5. * Effluent #1 = BOD? 30 < 220 mg/L an TSS >30 < 1 0 mg/L * Effluent #2 = BODS < 30 mg/L and TSS < 30 mg/L CST Name (Please Print) Signatur . CST Number James K. Thompson y.--- 3602 Address A.C.E. Soil & Site Evaluations Date Evaluation Conducted Telephone Number 340 Paulson Lake Lane, Osceola, WI 54020 6/17/2009 715-248-7767 Property Owner Vriezland II, L.L.C. - John Vrieze Parcel ID # 002-1029-10 -000 Page 2 of 4 3] Boring # - Boring p' Pit Ground Surface elev. 98.38 ft. Depth to limiting factor 8" in. Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots P in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 1 0-3 10yr3/2 none sil 2fgr ds as 2fmc 0.6 0.8 2 3-6 10yr3/2 none sil 2fsbk ds as 2fmc 0.6 0.8- 3 6-8 10yr5/3 none sil 1 fsbk ds as 2fmc 0.4 0.6 4 8-17 10yr5/3 f2f 7.5yr5/8 sil 2msbk ds cw 2fm1c 0.6 0.8 5 17-26 7.5yr4/4 f2d 7.5yr5/8 sl 1 msbk dsh cw 2fm 0.4 0.7 6 26-36 5yr4/4 m2d 7.5yr5/8 & sl Om dh - 1fm 0.2 0.6 m2d 10 6/2 H#2 & 3 part to ltinpl when disturbed. 10yr6/2 sand grains observed on cleavage plains in H# 5. 4] Boring # Boring *fl Pit Ground Surface elev. 97.36 ft. Depth to limiting factor 6" in. Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots PD in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 1 0-4 10yr3/2 none sil 2fsbk ds as 2fmc 0.6 0.8 2 4-6 10yr5/3 none sil 2fsbk ds cs 2fmc 0.6 0.8 3 6-18 7.5yr4/6 f2f 7.5yr5/8 fsl 1 msbk mfr cw 2fm 0.2 0.6 4 18-32 7.5yr4/4 m2d 7.5yr5/8 sl Om mfi - if 0.2 0.6 F 5-1 Boring # Boring Pit Ground Surface elev. 97.54 ft. Depth to limiting factor 12" in. Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Stricture Consistence Boundary Roots PD in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 1 0-4 10yr3/2 none sil 2fgr ds as 2fmc 0.6 0.8 2 4-12 10yr4/4 none sil 2fsbk ds cs 2fmc 0.6 0.8 3 12-19 10yr5/4 f2d 7.5yr5/8 sil 1 msbk dsh cw 2fm 0.4 0.6 4 19-24 7.5yr4/6 m2d 7.5yr5/8 sl 1msbk mfr cw 1f 0.4 0.7 5 24-32 7.5yr4/4 m2d 7.5yr5/8 sl 1 csbk mfr - if 0.4 0.7 T H#2 parts to 1thinpl when disturbed. * Effluent #1 = BOD 5> 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. SBD-8330 (R.07/00) A.C.E. Soil & Site Evaluations ` Property Owner Vriezland II, L.L.C. - John Vrieze Parcel ID # 002-1029-10 -000 Page 3 of 4 6 ] Boring # - Boring iei Pit Ground Surface elev. 98.85 ft. Depth to limiting factor 11" in. Soil Application Rate F Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots GPDM in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 1 0-6 10yr3/2 none sil 2fgr cis as 2fmc 0.6 0.8 2 6-8 10yr3/2 none sil 2fsbk ds as 2fmc 0.6 0.8 3 8-11 10yr5/3 none sil 2msbk ds as 2fmc 0.6 0.8 4 11-17 10yr5/3 f2f 7.5yr5/8 sil 2msbk ds cw 2fm1c 0.6 0.8- 5 17-26 7.5yr4/4 f2d 7.5yr5/8 sl 1 msbk dsh cw 2fm 0.4 0.7 6 26-33 5yr4/4 m2d 7.5yr5/8 & sl Om dh - 1fm 0.2 0.6 m2d 1 r6/2 H#2 & 3 part to lthinpl when disturbed. 10yr6/2 sand grains observed on cleavage plains in H# 5. Boring # -I Boring F-1 J Pit Ground Surface elev. ft. Depth to limiting factor in. Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots P in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 Borng # -I Boring F-1 _I Pit Ground Surface elev. ft. Depth to limiting factor in. Soil Application Rate Horizon Depth Dominant Color Redox Description Texture Structure Consistence Boundary Roots GPDM in. Munsell Qu. Sz. Cont. Color Gr. Sz. Sh. *Eff#1 *Eff#2 * Effluent #1 = BODS> 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. SBD-8330 (R07/00) A.C.E. Soil & Site Evaluations ■ 5owcva/cc46c~, /a,t ~ ~X~s~ ~ ~~nle eleuSca/e: / = s/d ~ ~ S,c7 r\! rl "4vy Sec-. /s/ .2j/f- , 0-, 7.1 of 1 ~1 St. cm f b¢,%►y 3 8 7 ores e 3 9B,0o'Co✓Ttac•c~ `y f8.6-0, a ~ u r r ~ ~ ~ ~Je%=lGO.~ \ a~. ~(d -4j~,or%. 60,,416-4 of 17e of Yo %oc/ vo~y t INTERPRETIVE DETERMINATION REPORT INDEX AND TITLE SHEET Project: Vriezland II A + 0" Interpretive Determination Contact: Vriezland II, LLC 110 East Third Street New Richmond, WI 54016 Parcel Address: NA - Undeveloped property Le al Descri tion: SW1/4NW1/4, Sec. 14, T29N, R16W., Tn. of Baldwin, St. Croix Co., WI. ubdivision Name: NA - 36.87 acre parcel Parcel ID Number: 002-1029-10-000 M CONTENTS: 168 v 8798 rl Introduction, Project Information, Methods, Pagel P.O.W.T.S. Local Geology, Geomorphology Conditionally Local Hydrology, Field Observations, Page 2 Government Reports, Conclusions APMUVED DEPARTMENT OF COMMERCE Recommendations, References Page 3 DOF SAFETY AND BUILDINGS L Attachments: Soil Evaluation Report SEE G RESP ENCE Inspection Report, Leroy Jansky Topographic Detail Soil Series Map, Plat map CST: James . Thompson Phone No.: (715) 248-7767 Signature: License No.: 30021 Date: T, ~~7 A+0" Interpretive Determination Report Vriezland II Property Introduction Between the dates of May22nd - June 17`h, 2009 a Soil & Site Evaluation of this site was completed by James K. Thompson, Dep't. of Commerce Credential #30021. The purpose to determine the suitability of the site to accommodate an Onsite Wastewater Treatment System (POWTS). This existing parcel comprises 36.87 acres, and will be marketed as a single family residential property at an unknown date in the future. The results of the evaluation indicated that soil suitability is uniform throughout the site, with suitable depths of soil ranging from 6" (A+2" with an 4" A horizon) to 13" (A+7" with a 6" A horizon). An onsite soils verification was completed by Leroy Jansky, Dep't. of Commerce Wastewater Specialist, on July9, 2009. CST, James Thompson was present to assist. Proiect information: The proposed mound site is located in the northeast corner of the SW 1/4NW 1A, Sec. 14, T.29N. R. 16W., Tn. of Baldwin, St. Croix County, WI., lying approximately 2,500' south of the center line of County Highway E and 975'east of the centerline of 250`h Street. The site has been untended northern hardwood woodlot for several years and contains many large, mature Oaks, Maples, and Basswood. Methods Soil color, texture, consistence, and Redoximorphic features have been evaluated and recorded on the attached Soil & Site.Evaluation Report in accordance with Chapter Comm. 85.60(2), Wisc. Administrative Code. The initial field investigation of the site included evaluation of 11 hand dug pits and 5 backhoe pits. 2 additional pits were evaluated during the soil verification by Jansky. One-foot contour intervals were determined within and surrounding the proposed system location by collecting rod and transit elevations at all soil pits and at 20' grid intervals throughout the proposed system area. Additional elevations and horizontal measurements were taken as needed to identify landscape position and determine separation distances from dominant landscape forms. Local Geoloev St. Croix County is underlain by limestone and St. Peter sandstone, which is overlain with glacial till, forming the principal soil parent material. A search of Department of Natural Resources Well Drilling Reports filed for wells constructed within the geographic region indicated soil depths of 32'- 165' overlying sandstone and/or limestone bedrock. Static water levels are found at 85'- 191'. Geotoorpholou Parent Material: The parent material of this site is consistent with the mapping units - Freeon silt loam - as shown in the U.S.G.S. Soil Survey Manual, consisting of glacial till overlain by a post glaciation Aeolian loess cap. These soils are moderately well drained with moderate permeability. Landscape position: The tested area is positioned on the shoulder slope of a glacial ground moraine at a nominal Mean Sea Level (MSL) elevation of 1247'. The contour lies approximately 8' below a uniform, convex summit slope. The moraine extends gradually upslope to the east - southeast to a nominal elevation of 1255' MSL. The ground moraine extends downslope from the tested area in a north - northwesterly direction approximately 1,000' to an unnamed intermittent drainage way at the footslope having a nominal elevation of 1220' MSL, continuing westerly to an eventual elevation of 1210' MSL. The toe slope continues in a northwesterly direction, finally feeding into the unnamed intermittent stream which is located approximately 1450' northwest of the tested area. Slope and Aspect: The contour within the proposed system area is smooth linear, with a slope shape that is convex along the horizontal contour and linear along the vertical contour. The ground slope is consistent at 1% - 2% with a southwest aspect of 270°. 1 Local Hydroloey: Surface Water Drainage: Surface water drainage is uniform throughout the proposed system footprint and the surrounding area within 200'. The convex linear slope throughout the tested area disperses surface water flow away from the proposed system area. There are no areas of concentrated flow within this area. No artificial means of surface and/or subsurface drainage or ponding were found within 500' of the proposed system area. Subsurface Water Drainage: The A and B horizons consist of moderately structured silt loam providing good infiltration potential. When combined with the uniform 1% - 2% slope across the proposed system area, the site should provide good lateral subsurface water flow. Soil Saturation: Soil pits were evaluated throughout this property on several occasions throughout the months of May and June, 2009. Evaluations were conducted on May 28d`, June I", l la', 12`x, 17', and July 9 h, 2009. Soil pits were evaluated to depths ranging from 32" - 41". Saturated soil conditions were not encountered during any of the evaluations. Field Observations: Soil Morphology: The soils within the proposed system area were found to be consistent with the Freeon mapping unit as shown in the U S G S Soil Survey of St. Croix County, Wisconsin. Moderately structured silt loams were observed ranging to a depth of 11" - 17" with weakly structured silt loams below ranging from 11" - 17". Underlying the silt loams are weakly structured sandy loams and sandy loams and fine sand loams at depths of 12" - 41". Redoximorphic Features: Redoximorphic features were not observed within the A horizon of any of the soil pits, with all profiles displaying redoximorphic features at A+2". Redoximorphic concentrations were observed as Fe concentrations within the B and C horizons. Redoximorphic depletions were observed within the C horizon. Hydric Soils: The soils a this site do not meet the necessary criteria to be categorized as hydric soils. Government Reports: Leroy Jansky, Wisconsin Department of Commerce Wastewater Specialist, assessed soil conditions at the site by means of an onsite soil verification conducted on July 9, 2009. The Jansky report confirms the suitability of the site to accommodate an A + 0" mound. Conclusions and Recommendations: Conclusion: No redoximorphic features were observed within the A horizon of any of the evaluated soil pits, and indicate that the highest level of saturation is found at 6" below surface elevation. The lack of hydric soils indicate that the site is likely saturated for less than 5% of the growing season. This, coupled with the lack of redoximorphic depletions in the upper horizons and the strong matrix colors displayed throughout the soil profiles, indicate limited saturation within these soils. The redoximorphic features observed are likely a result of short-term seasonal saturation. The moderately structured silt loam soils in the A horizon and upper part of the B horizon will accommodate the infiltration and dispersal of applied wastewater from the POWTS and will allow treated effluent to be assimilated into the subsurface soils. The convex linear slope will accommodate uniform dispersal of both naturally occurring surface water and applied wastewater away from the site. Seasonally saturated conditions do not occur within the upper 6" of the soil profile as evidenced by the lack of redoximorphic features. The site has a minimum of 6" of unsaturated in situ soil for treatment and dispersal of treated wastewater effluent and is therefore suitable for a mound POWTS as allowed by Comm 83.44(3)(b)l. 2 Recommendations: 1.) The mound dispersal cell should be constructed on the 98.75' contour in a convex linear shape as indicated on the Soil & Site Evaluation Report. The dispersal cell should be designed and installed using as much of the available contour length as possible - approximately 100.0'. 2.) Thirty inches (30") of ASTM-C33 sand fill shall be placed beneath the upper edge of the dispersal cell. 3.) The linear loading rate for application of septic tank effluent should be 4.5 gpd/linear ft. or less and the basal area application rate should not exceed 0.20 gpd/sq. ft. The downslope toe of the mound must be extended to provide additional basal area. 4.) The mound shall be constructed to divert surface water around and away from the mound. A surface water diversion trench should be constructed at approximately 10' wide extending between 10' - 20' upslope of the mound site. Additional fill should also be added directly upslope of the upper toe of the mound and tapered into the diversion trench and graded to direct surface water around and away form the mound area. 5.) The mound shall be constructed in accordance with Dep't. of Commerce regulations and recommendations including the removal of all vegetation from the site prior to site preparation. Tree removal shall be accomplished so as to limit destruction of topsoil structure and would best be accomplished under frozen soil conditions. 6.) The site should be chisel plowed to a minimum depth of 12". Final authority for approval of a POWTS mound on this site lies with the appropriate regulatory authorities, the Wisconsin Dep't of Commerce and the St. Croix County Zoning Dep't. This report and its observations, recommendations and conclusions are the professional opinion of James K. Thompson, Dep't of Commerce Credential #30021. References: Soil Survey of St. Croix County, Wisconsin. July 1978. United States Department of Agricultural Soil Conservation Service in cooperation with Research Division of the College of Agriculture and Life Sciences University of Wisconsin. Department of Commerce Chapters Comm 83 and 85, Wisconsin Administrative Code,. Field Indicators of Hydric Soils in the United States. 1996. G.W. Hurt, Whited, P.M., and Pringle, R.F. United States Department of Agricultural, Natural Resources Conservation Service, Fort Worth Texas. Hydric Soil List for St. Croix County, Wisconsin. United States Department of Agricultural, Natural Resources Conservation Service. ftp://ftp,sc.sc.egov.usda.gov/wi/soil/hyd/hyd ] 09htm Field Book for Describing and Sampling Soils, Version 2.0. 2002. Schoeneberger, P.J., Wysocki, D., Benham, E.C., and Broderson, W.D. (editors) 2002. Natural Resources Conservation Service, National Soil Survey Center, Lincoln, NE. U.S. Geological Survey. Topographic Map download, http://www.terraserver.microsoft.com Wisconsin Department of Natural Resources. Well Construction Reports. http://prodmtexOO.dnr.state.wi.us Ground Water Resources and Geology of St. Croix County, Wisconsin. 1976. Barman, R.G. & Trotta, L. 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