Facility Overview
Griswold Industries is operating under a active permit of type: Industrial. Primary industry: Industrial Valves. Tertiary industry: Nonferrous Foundries, Except Aluminum and Copper.
The site has self-reported imperviousness of 98%. 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 Lower Newport Bay. This information is crucial for understanding the facility's potential environmental influence on local water resources.
Additional Details
Historical Exceedances
This facility has historically exceeded limits for the following parameters:
pH
pH levels outside the normal range can harm aquatic life and affect water chemistry. Acidic water can leach toxic metals from sediments, while alkaline water can increase ammonia toxicity.
Zinc, Total
Excessive zinc can be toxic to aquatic organisms, particularly fish. It can accumulate in sediments and aquatic life, potentially affecting the entire food chain.
Copper, Total
Copper is highly toxic to aquatic life, even in small concentrations. It can accumulate in fish gills and interfere with osmoregulation.
Zinc, Total Recoverable
Excessive zinc can be toxic to aquatic organisms, particularly fish. It can accumulate in sediments and aquatic life, potentially affecting the entire food chain.
Copper, Total Recoverable
Copper is highly toxic to aquatic life, even in small concentrations. It can accumulate in fish gills and interfere with osmoregulation.
Aluminum, Total Recoverable
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.
Nitrite Plus Nitrate (as N)
High levels contribute to nutrient pollution, leading to algal blooms, oxygen depletion, and potential toxic conditions for aquatic life.
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
| Year | Sample Reports | Exceedances | Status |
|---|---|---|---|
| 2024 | 10 | 16 | Exceedances Detected |
| 2023 | 10 | 0 | Up To Date |
| 2022 | 10 | 0 | Up To Date |
| 2021 | 12 | 0 | Up To Date |
| 2020 | 12 | 0 | Up To Date |
| 2019 | 18 | 2 | Exceedances Detected |
| 2018 | 24 | 36 | Exceedances Detected |
| 2017 | 24 | 122 | Exceedances Detected |
| 2016 | 15 | 28 | Exceedances 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.