Table 2 San Francisco Bay case study summary. The sample hazard is based on the type and number of particles. The risk also incorporates the volume concentration in the sample
| Sample number | Sample type | Total number of MPs | Sample volume (L) | Concentration (# MP/ L) | Sample hazard | Sample risk |
|---|---|---|---|---|---|---|
| 1 | Stormwater | 1202 | 197 | 6.10 | 2908.6 | 14.76 |
| 2 | Manta trawl | 173 | 176,000 | 0.00098 | 406.1 | 0.0023 |
| 3 | Wastewater | 77 | 916 | 0.084 | 170.6 | 0.19 |