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Mr. Ron Mayhew October 10, 2012 Page 2 of 3 bedroom homes, and based on our observations, it is probable that many of the homes connected to this system are larger than 4 bedrooms. Septic system design and permitting documents do not include many of the details required (equipment and pump specifications, piping layout and specifications, drain field details and specifications, system maintenance requirements, etc.) for large septic system designs. Subdivision design documents do not appear to be in compliance with applicable regulations (Forsyth County UDC, May 22, 2000), good engineering practice, or standard industry procedures. A bored well was observed on Lot #17 that was not located on the proposed plan or permit documents. The septic drain field reserve area appears to be located within the required 100-foot setback area from this well. Added features on this lot appear to encroach (fence, porch, landscaping trees) onto the septic drain fields. Installation of these features may have caused penetration of the chamber structure, potentially causing the system piping to drain, and therefore overloading soils in any areas that may be compromised. Water quality results from KW Soils, Inc. indicate that very high levels of fecal coliform bacteria were detected in the stream located west of Ivyshaw Drive. Iron bacteria was observed in water seeping from the eastern bank of the stream below Lot #17 and from a fracture in the bedrock at the spring head. Cloudy water was observed in a pool below Lot #18. Iron bacteria blooms are typically caused by contamination sources. This observation may indicate failure of the septic systems on Lot #17, Lot #18, and the community septic system located upgradient of Lot #18. Suitable soil areas on each of the systems installed are relatively small, with very little to no area remaining for any safety factor. Installation of replacement drain fields would likely be difficult and impractical. The observations above were made based on our review of files provided and our site inspection on October 8, 2012. Conclusions Based on the information obtained, it is our opinion that the septic systems in the Ivyshaw Subdivision are deficient in their design and construction and are currently failing. The failing systems are causing significant and ongoing impacts to the stream and to Lake Lanier. The very high levels of fecal coliform contamination detected in the stream are well above the allowable limits for recreational use and pose a significant risk to anyone coming in contact with Lake Lanier water in areas near the stream discharge point. P:\Ron Mayhew\Septic Opinion Letter 10-10-12.doc
Mr. Ron Mayhew October 10, 2012 Page 3 of 3 Recommendations MCES recommends the following actions for the Ivyshaw Subdivision: Conduct a detailed engineering review of the subdivision plans to include an evaluation of the plan deficiencies in relation to applicable regulations. Conduct additional water quality sampling at to further characterize the fecal coliform contamination detected in the stream. MCES has provided a cost estimate to assist with recommendations under a separate cover. We appreciate the opportunity to be of service. Should you have comments or questions about this letter or our work on this project, please contact us at (706) 579-1607. Sincerely, Mill Creek Environmental Services, Inc. Dan Centofanti, P.G. Project Manager Jake Irwin Project Scientist P:\Ron Mayhew\Septic Opinion Letter 10-10-12.doc
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IN THE SUPERIOR COURT OF FORSYTH CO
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failing and contaminating the strea
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6. Restoration and remediation of g
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