Definition and Meaning
The CE1207 Calculation of Impervious Percentage Form doc is a specialized form designed to help property owners, particularly those with single-family residential lots of 15,000 square feet or less, determine the impervious percentage of their property. Impervious surfaces are those that do not allow water to penetrate, which can lead to increased runoff and potential stormwater management issues. This form aids users in calculating the percentage of impervious surfaces, such as driveways, roofs, and patios, versus permeable areas, like lawns and gardens, on their property. The calculation is essential for understanding whether a property requires stormwater detention measures.
How to Use the CE1207 Calculation of Impervious Percentage Form doc
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Gather Property Details: Start by collecting all necessary information about the property's total area and its various surface types.
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Identify Impervious Surfaces: List all surfaces considered impervious, such as asphalt, concrete, and rooftops. Exclude permeable materials like certain types of pavers or gravel.
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Calculate Total Impervious Area: Sum up the square footage of all identified impervious surfaces.
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Determine Impervious Percentage: Divide the total impervious area by the property's total area, then multiply by 100 to get the impervious percentage.
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Check Against Thresholds: Compare the calculated percentage with local regulations to determine if stormwater detention is necessary. A percentage of 75% or less typically means no detention is required.
Steps to Complete the CE1207 Calculation of Impervious Percentage Form doc
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Begin with Form Identification: Ensure you have the correct version of the form titled "CE1207 Calculation of Impervious Percentage."
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Complete the Header Information: Enter basic details such as property address and owner's contact information.
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Detail Impervious Surfaces: Fill in specific fields for each impervious area, including description, dimensions, and area calculation.
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Proceed with Calculations: Use the provided formulas and fields to calculate the total impervious area and percentage.
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Review and Verify Entries: Double-check all inputs for accuracy, ensuring the information corresponds with property records.
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Finalize the Form: Complete any additional sections required by local authorities and ensure all necessary signatures are obtained.
Key Elements of the CE1207 Calculation of Impervious Percentage Form doc
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Surface Type Identification: Clearly defined categories for impervious versus pervious surfaces are critical for accuracy. Users must distinguish between materials like asphalt and permeable pavers.
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Calculation Formula: The form provides a detailed method for calculating the impervious percentage, including sample formulas and examples.
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Regulatory Compliance Section: Guidance on meeting local compliance standards for stormwater management, including links to municipal guidelines.
Important Terms Related to CE1207 Calculation of Impervious Percentage Form doc
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Impervious Surface: A surface that does not allow water infiltration, such as concrete or asphalt.
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Detention Requirement: Mandate for managing stormwater runoff through engineered solutions when impervious surfaces exceed a set threshold.
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Permeable Material: A surface that allows water to seep through, reducing runoff and potentially mitigating the need for detention.
Examples of Using the CE1207 Calculation of Impervious Percentage Form doc
Consider a property with a total area of 10,000 square feet, including a 2,000-square-foot house, a 500-square-foot driveway, and a 300-square-foot patio. The impervious percentage would be calculated as follows:
- Total Impervious Area = 2,000 + 500 + 300 = 2,800 square feet
- Impervious Percentage = (2,800 ÷ 10,000) × 100 = 28%
This calculation shows a 28% impervious percentage, indicating no need for stormwater detention if the local threshold is 75%.
Who Typically Uses the CE1207 Calculation of Impervious Percentage Form doc
Property developers, real estate professionals, environmental consultants, and homeowners use this form to ensure compliance with local stormwater management rules. It is especially relevant to those involved in new construction, landscaping projects, or significant property renovations that might alter surface compositions.
State-Specific Rules for the CE1207 Calculation of Impervious Percentage Form doc
Different states may have varying thresholds and requirements for impervious surfaces and stormwater detention:
- Some regions demand detention for any new impervious surface additions.
- Others may vary the impervious percentage threshold based on local environmental concerns or geographic features.
Review state regulations or consult local planning departments to ensure compliance with regional standards.
