Westlake Royal Stone LLC

Facility Overview

Westlake Royal Stone LLC is operating under a active permit of type: Industrial. Primary industry: Concrete Products, Except Block and Brick.

The facility covers a total area of 37.8 Acres, with an active operational area of 30.2 Acres.

The site has self-reported imperviousness of 95%. 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 directly affects the Tulucay Creek. This information is crucial for understanding the facility's potential environmental influence on local water resources.

350 Tower Road, American Canyon, CA 94503

Additional Details

Permit Status: Active
County: Napa
WDID: 2 28I029890
Application ID: 546908

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.

  • Oil and Grease

    Oil and grease can form films on water surfaces, reducing oxygen levels and harming aquatic life. They can also contaminate sediments and be toxic to organisms.

  • Iron, Total Recoverable

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

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
2024183Exceedances Detected
2023183Exceedances 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.