trans-1,2-Dichloroethylene
Rustic Ridge Mobile Home Park
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 | 4 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-01-22 | 92370434002VOC | ND |
| 2018-06-19 | 92389064002VOC | ND |
| 2018-10-15 | 92403565001VOC | ND |
| 2018-11-20 | 92408223001VOC | ND |
| 2019-06-24 | 37729_19-26930 | ND |
| 2019-07-22 | 37729_19-30882 | ND |
| 2019-10-07 | 92448595001_12710 | ND |
| 2020-03-24 | 92470978001_12710 | ND |
| 2020-06-22 | 92483005002_12710 | ND |
| 2020-09-22 | 92496839001_12710 | ND |
| 2020-11-17 | 92506806001_12710 | ND |
| 2021-03-08 | 92526282001_12710 | ND |
| 2021-04-19 | 92533976001_12710 | ND |
| 2021-07-13 | 92549354001_12710 | ND |
| 2021-10-13 | 92566431001_12710 | ND |
| 2022-01-23 | 92583961001_12710 | ND |
| 2022-04-03 | 92596762001_12710 | ND |
| 2022-07-10 | 92613871001_12710 | ND |
| 2022-10-05 | 92629553001_12710 | ND |
| 2023-01-23 | 92648050001_12710 | ND |
| 2023-09-17 | 92688364001_12710 | ND |