trans-1,2-Dichloroethylene
Barkers Landing
NOTE: Barkers Landing purchases water from Church Creek which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by Church 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 | 1 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 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
NOTE: Barkers Landing purchases water from Church Creek which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by Church Creek.
| Date | Lab ID | Result |
|---|---|---|
| 2014-09-10 | L5154143-1-VOC | ND |
| 2014-09-10 | L5153553-1 VOC | ND |
| 2014-09-10 | L5116259-1 VOC | ND |
| 2014-09-11 | L5154146-1 VOC | ND |
| 2015-06-17 | L5500849-VOC | ND |
| 2015-09-25 | L5531583-1 VOC | ND |
| 2015-09-28 | L5540573-1 VOC | ND |
| 2015-09-28 | L5540445-1 VOC | ND |
| 2016-03-30 | L6025093-1 VOC | ND |
| 2016-03-30 | L6022434-1 VOC | ND |
| 2016-03-30 | L6019371-1 VOC | ND |
| 2016-03-30 | L6019355-1 VOC | ND |
| 2017-08-31 | L6903057-1 VOC | ND |
| 2017-08-31 | L6739787-1 VOC | ND |
| 2017-08-31 | L6722595-1 VOC | ND |
| 2017-11-07 | L6968858-1 | ND |
| 2018-07-20 | 8053615-01 VOC | ND |
| 2018-07-20 | 8053613-01 VOC | ND |
| 2018-07-27 | 8074833-01 VOC | ND |
| 2018-09-28 | 8094079-01 VOC | ND |
| 2019-06-26 | 9055335-01 VOC | ND |
| 2019-07-19 | 9065233-01 SUVO | ND |
| 2019-07-19 | 9065230-01 SUVO | ND |
| 2019-07-30 | 9075023-01 SUVO | ND |
| 2019-07-31 | 9075022-01 SUVO | ND |