trans-1,2-Dichloroethylene
Martin Creek
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 |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-02-26 | 1402Q71-01A | ND |
| 2014-09-29 | 1409Y00-01A | ND |
| 2015-03-10 | 00281-REI CONSUL | ND |
| 2015-12-03 | 00281-REI CONSUL | ND |
| 2016-03-17 | 16032426-01A | ND |
| 2016-03-31 | 1604003-01A | ND |
| 2016-06-22 | 16062941-01A | ND |
| 2016-06-22 | 16062941-02A | ND |
| 2016-06-22 | 16062941-03A | ND |
| 2018-02-07 | 18020982-01A | ND |
| 2018-02-28 | 18030021-01A | ND |
| 2018-11-06 | 18110989-01A | ND |
| 2019-02-12 | 19021811-04A | ND |
| 2019-02-12 | 19021811-09A | ND |
| 2019-02-12 | 19021811-14A | ND |
| 2019-02-13 | 19022014-01A | ND |