Stormwater Information
Samples will be accepted Monday - Thursday between 8:30 AM and 5:00 PM. We cannot receive stormwater samples on Fridays; this is due to the Aquatic Toxicity analysis, which has a 36-hour hold time, and is sub-contracted. We apologize for any inconvenience this may cause.
| Analyte | Method | Container | Preservative |
|---|
| Nitrate | SM-4500-NO3-F | ||
| pH | EPA 150.1 | 1 - Liter Plastic | None |
| TSS | EPA 160.2 |
| COD | SM-5220 | ||
| TKN | EPA 351.2 | 1 - 500 mL Plastic | Sulfuric Acid |
| Total Phosphorus | EPA 365.1 |
| Oil and Grease | EPA 1664 | 2 - Amber Glass | Sulfuric Acid |
| Copper | EPA 200.7 | ||
| Lead | EPA 200.7 | 1 - 250 mL Plastic | Nitric Acid |
| Zinc | EPA 200.7 | ||
| Hardness | SM-2340B |
| Aquatic Toxicity | LC-50 | 1 - Liter Plastic | None |
Samples must be received at the lab within six (6) hours of collecting the sample.
Notes:
- The 4 oz. cup that is supplied with pH strips inside is to measure the pH of the rain. Please open this cup and allow the rain to freely fall inside while you are sampling. When sampling is complete, please close the lid and return to the lab for analysis.
- Some permits require additional analyses; please check your permit.
Click here to download a printable version (.pdf).