trans-1,2-Dichloroethylene
Yeshiva Farm Settlement
1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 5 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 60 ppb
The EWG Health Guideline of 60 ppb for trans-1,2-dichloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for trans-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-11-12 | 1.803008POCS | ND |
| 2018-11-12 | 1.803006POCS | ND |
| 2018-11-12 | 1.803007POCS | ND |
| 2019-11-21 | 1.903264POCS | ND |
| 2019-11-21 | 1.903262POCS | ND |
| 2019-11-21 | 1.903263POCS | ND |
| 2020-01-13 | AW00848POCS | ND |
| 2020-08-25 | AW16413POCS | ND |
| 2020-08-25 | AW16415POCS | ND |
| 2020-10-22 | 1.003624POCS | ND |
| 2020-10-22 | 1.003626POCS | ND |
| 2020-10-22 | 1.003625POCS | ND |
| 2021-01-06 | AX00341-POCS | ND |
| 2021-08-10 | AX16131-POCS | ND |
| 2021-08-10 | AX16129-POCS | ND |
| 2021-09-15 | 1.102732-POCS | ND |
| 2021-09-15 | 1.102731-POCS | ND |
| 2021-09-15 | 1.102733-POCS | ND |
| 2022-01-12 | AY00691-POCS | ND |
| 2022-08-03 | 1.221966-POCS | ND |
| 2022-08-03 | 1.221968-POCS | ND |
| 2022-08-03 | 1.221967-POCS | ND |
| 2022-09-19 | AY16756-POCS | ND |
| 2022-09-19 | AY16754-POCS | ND |
| 2023-08-23 | AZ15586-POCS | ND |
| 2023-08-23 | AZ15588-POCS | ND |
| 2023-09-21 | 1.231346-POCS | ND |
| 2023-09-21 | 1.232347-POCS | ND |
| 2023-09-21 | 1.232348-POCS | ND |