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0 <br />g. Disturbed Soil Limitations: Disturbed soils present unusual <br />design limitations due to unpredictable soil characteristics. <br />Extensively detailed site and soil evaluation is required for <br />consideration of any drainfield area on the following soil <br />classification series: <br />Cut - Cu Borrow pit - BoBp <br />Fill- Fd Gravel pit - GP, <br />h. Severely Restrictive Soils: Lowland and marshy soils present <br />extremely severe limitations for any drainfield installation <br />due to high ground water table depths, flooding hayards and <br />extremely slow percolation rates. Every reasonable effort <br />must be made to preclude these soils from consideration for <br />drainfield installation. <br />Where such -soils must be considered 'due to existing lot con- <br />figurations, the proposed designs shall be carefully engineered <br />and could be expected to include methods such as complete soil <br />replacement mounding, and other innovations. The City Engineer <br />must approve all such designs and thq City is under no obligation <br />to approve any drainfield on these soils. <br />Any drainfield approved for installation on these soils shall <br />be subject to the metering of.water inflow, and regular ground <br />water quality testing. Certificates of Compliance shall be <br />issued on a one-year renewable substandard system basis and may <br />be revoked at any time that ground water quality is found to <br />be deteriorating. _ <br />The following.soil classification series fall within this <br />restrictive category: <br />Glencoe - Gc Marsh - Ma <br />Hamel Loam - Ha Peaty Muck - Pa, Pm <br />Lake Beaches - Lc, Ld ' <br />-15 <br />