Publication Summary

This document is one in a series describing the results of ground water sampling at Lakewood/Plaza Cleaners. Ecology has conducted semi-annual ground water sampling at the site since 1991. The objective of this sampling is to collect ground water quality data for the Toxics Cleanup Program to evaluate the effectiveness of Lakewood supply wells H1 and H2 to contain and remove contaminated ground water caused by Plaza Cleaners.

This document is one in a series describing the results of ground water sampling at Lakewood/Plaza Cleaners. Ecology has conducted semi-annual ground water sampling at the site since 1991. The objective of this sampling is to collect ground water quality data for the Toxics Cleanup Program to evaluate the effectiveness of Lakewood supply wells H1 and H2 to contain and remove contaminated ground water caused by Plaza Cleaners.

Samples were collected on July 15, 1998 from one municipal well (H2) and five monitoring wells: MW-16A, MW-20A, MW-20B, MW-27 and MW-33. All samples were analyzed for volatile organics (VOAs). The quality assurance review and laboratory reporting sheets are presented in Appendix A.

Monitoring wells MW-20B and MW-16A, as well as municipal well H2 continue to have tetrachloroethene (PERC) concentrations that exceed the Model Toxic Control Act (MTCA) cleanup standard of 5.0 ug/L. PERC concentrations in these wells during the latest round of sampling were MW-20B (575 ug/L), MW-16A (30 ug/L), and H2 (10 ug/L). Trichloroethene (TCE) was detected in MW-20B at a concentration of 10 ug/L, which also exceeds the MTCA cleanup standard for TCE of 5.0 ug/L. Cis-1,2-dichloroethene (cis-1,2-DCE) was detected in wells MW-20B and MW-16A at concentrations of 23 ug/L and 1.5 ug/L, respectively. Overall, concentrations are similar to those reported in previous sample rounds.