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HomeMy WebLinkAboutSW6200701_Report (Soils)_20210119Southeastern Soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (910) 822-4540 Email mike@southPasternsoil.com April 3, 2020 Mr. George Rose, PE PO Box 53441 Fayetteville, NC 28305 Re: Seasonal water table determination (SHWT), portions of Naze Property, PIN's 0513-86-6598.000, NC Hwy. 210 South, Harnett County, North Carolina Dear Mr. Rose, An evaluation of soil properties has been conducted at your request on portions of the aforementioned property. The purpose of the investigation was to determine Seasonal High -Water Table depths (SHWT) for use in storrnwater retention/treatment design. SHWT depths are determined in auger borings based on observable characteristics in soil profiles. Soils at the proposed site are most similar to the Gilead soil series (see attached boring logs). Two soil borings were advanced to a depth of at Ieast 7.0 feet below the soil surface. Seasonal High -Water Table (SHWT) as determined by evidence of colors of chroma 2 or less (and/or concentrations of high redox mottles) was encountered at depths of 32 and 35 inches below the existing ground surface (see chart attached). It should be noted that the reported SHWT does not necessarily reflect the elevation of static groundwater (due to variations in groundwater recharge rates, annual rainfall, drought conditions, etc.). The data presented in this report are limited by a number of considerations. The primary consideration is that soil formations can be highly variable. The soils found on this site can be subject to inclusions of other soil types, perched water, artesian conditions and/or layers of undulating low permeability clay seams. These and other soil conditions can have an effect on the steady state of groundwater flow. To the extent possible, we have SOiLISITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS GROUNDWATER DRAINAGEIMOUNDING • SURFACEISUBSUAFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN identified the soil types that will impact the flow of groundwater and have provided a professional opinion as to the depth of SHWT. I trust this is the information you require at this time. Sincerely, AIIIZ4)6c�- Mike Eaker NC Licensed Soil Scientist 41030 �4� Southeastern Soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (910) 822-4540 Email mike@southeasternsoil.com SHWT depths, Nam Property, NC Hwy. 210 South, Harnett County, NC BORING SHWT DEPTH (inLkesl Observed Water inches 1 32 60 2 35 67 SOIL/SITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS GROUNDWATER DRAINAGE/MOUNDING • SURFACEISUSSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN Southeastern Soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (910) 822-4540 Email mike@southeastemsoil.com Soil Boring Log (Boring 1), Nam Properly, NC Hwy 210 South, Harnett County, NC This map unit consists of moderately well drained soils on uplands. These soils formed in clayey sediment. Slope ranged from 1 to 3 percent. 0 to 12 — mixed sand and clay fill material. E - 12 to 28 inches; yellowish brown (1 OYR 5/4) loamy sand; weak fine granular structure; very friable; many fine and medium roots; clear wavy boundary. Btl - 28 to 32 inches; reddish yellow (7.5YR 6/8) sandy clay loam; weak medium subangular blocky structure; firm; gradual wavy boundary. Bt2 - 32 to 62 inches; mottled reddish yellow (7.5YR 6/8) and light gray (2.5Y 7/1) silty clay; massive parting to angular blocky structure; very firm; gradual wavy boundary. C1 - 62 to 78 inches; light gray (2.5Y 7/1) silty clay loam; firm; massive structure; gradual wavy boundary. C2 - 78 to 84 inches; light gray (2.5Y 7/1) coarse loamy sand; very friable; massive structure. SHWT @ 32 inches (2.5Y 7/1) SOIL/SITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS GROUNDWATER DRAINAGE/MOUNDING • SURFACI (SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN Southeastern soil & Environmental Associates, Inc. P.O. Box 9321 Fayetteville, NC 28311 Phone/Fax (91 D) 822-4540 Email mike@souiheasternsoil.com Soil Boring Log (Boring 2), Nam Property, NC Hwy 210 South, Harnett County, NC This map unit consists of moderately well drained soils on uplands. These soils formed in clayey sediment. Slope ranged from 1 to 3 percent. A - 0 to 4; dark brown (IOYR 3/3) loamy sand; weak fine granular structure; very friable; many fine and medium roots; clear smooth boundary. E - 4 to 9 inches; yellowish brown (IOYR 5/6) loamy sand; weak fine granular structure; very friable; many fine and medium roots; clear wavy boundary. Bt - 9 to 26 inches; yellowish brown (1 OYR 5/8) sandy clay loam; weak fine subangular blocky structure; firm; gradual wavy boundary. BC - 26 to 35 inches; strong brown (7.5YR 5/6) light sandy clay loam; massive structure; friable to firm; gradual wavy boundary. C 1 - 35 to 65 inches; mottled strong brown (7.5YR 5/6), red (2.5YR 5/8) and light gray (2.5Y 7/1) sandy clay loam; firm; massive structure; gradual diffuse boundary. C2 - 65 to 84 inches; mottled strong brown (7.5YR 5/6), red (2.5YR 5/8) and light gray (2.5Y 7/1) silty clay; very firm; massive structure. SHWT @ 35 inches (2.5Y 7/1) SOUSITE EVALUATION • SOIL PHYSICAL ANALYSIS - LAND USE/SUBDIVISiON PLANNING - WETLANDS GROUNDWATER DRAINAGE/MOUNDING - SURFACE/SUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION 8, DESIGN SOILISITE EVALUATION • SOIL PHYSICAL ANALYSIS • LAND USE/SUBDIVISION PLANNING • WETLANDS GROUNDWATER DRAINAGE/MOUNDING . SURFACEISUBSURFACE WASTE TREATMENT SYSTEMS, EVALUATION & DESIGN NnT S:r%D 1 PCAi iicc 2 CO r-F