McNear Brick & Block

Facility Overview

McNear Brick & Block is operating under a active permit of type: Industrial. Primary industry: Brick and Structural Clay Tile. Secondary industry: Concrete Block and Brick.

The facility covers a total area of 25 Acres, with an active operational area of 25 Acres.

The site has self-reported imperviousness of %. 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 McNear Marsh. This information is crucial for understanding the facility's potential environmental influence on local water resources.

1 McNear Brickyard Rd, San Rafael, CA 94901

Additional Details

Permit Status: Active
County: Marin
WDID: 2 21I009386
Application ID: 182145

Historical Exceedances

This facility has historically exceeded limits for the following parameters:

  • Iron, Total

    Excessive iron can harm aquatic ecosystems by forming precipitates that smother habitats. It can also affect fish gills and reduce visibility in water.

  • Aluminum, Total

    Aluminum can be toxic to aquatic life, particularly in acidic conditions. It can accumulate in fish gills and affect their ability to take in oxygen.

  • Total Suspended Solids (TSS)

    High levels of suspended solids can reduce water clarity, harm fish gills, smother aquatic habitat and eggs, and transport pollutants through water bodies.

These limits reflect Water Quality Standards promulgated to protect human health or the environment, or standards that the State or EPA developed to indicate the Facility may be failing to implement best practices to protect storm water.

Discharge Reports Summary

YearSample ReportsExceedancesStatus
2024125Exceedances Detected
202222Exceedances Detected
2019411Exceedances Detected
201812Exceedances Detected

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.