Groundwater Recharge (GWR) Spreadsheet Review Tool
An interactive guide for Municipal Engineers to evaluate N.J.A.C. 7:8 permit applications, focusing on the counterintuitive depth parameters for Pervious Pavement and Bioretention Systems.
The "Opposite Depth" Mystery Calculator
This section deconstructs the NJGRS variables: d_BMP, d_BMPu, and d_EXC. Use the calculator to simulate applicant inputs and visualize the correct values. The chart highlights the common 250% overestimation error where applicants confuse stone depth with effective storage depth.
System Parameters
The 250% Overestimation Error (Pervious Pavement)
Cross-Section Logic Model
Regulatory Defensibility Checklist
This section provides a four-step framework for municipal reviewers. It outlines the mandatory checks required to confirm an applicant's GWR spreadsheet values align with N.J.A.C. 7:8 standards and site testing. Click each item to view specific review strategies.
1. Check Rainfall Factors
🌧County-specific precipitation adjustments.
2. Verify Soil Testing
🌱Match spreadsheet to Chapter 12 Soil Logs.
3. The 72-Hour Rule
⏲Infiltration BMPs must drain within 72 hrs.
4. SHWT Separation
↕Maintain 2-foot separation from water table.
Phase 0: Deep Research Agent Prompt
This section provides a specialized prompt designed to trigger a deep technical simulation by an AI regulatory assistant. Use this to verify complex permit math and identify discrepancies between manual versions.