Facility Overview
C W Mcgrath Inc Tunnel Hill Gr is operating under a active permit of type: Industrial. Primary industry: Crushed and Broken Granite. Tertiary industry: Local Trucking Without Storage.
The site has self-reported imperviousness of 90%. In the context of the Industrial General Permit for stormwater runoff, imperviousness refers to the percentage of the facility's surface area that doesn't allow water to penetrate, such as concrete, asphalt, or rooftops. The higher the imperviousness percentage, the more potential impact on local water quality as there is a greater surface area to accumulate pollutants.
In terms of water impact, this facility indirectly affects the San Diego River. This information is crucial for understanding the facility's potential environmental influence on local water resources.
Additional Details
Discharge Reports Summary
| Year | Sample Reports | Exceedances | Status |
|---|---|---|---|
| 2017 | 1 | 0 | Up To Date |
Discharge Report Exceedances Trend
This chart shows the trend of discharge report exceedances over time. The values represent the number of exceedances for each year.