Publication Summary

This progress report is one in a series describing results of long-term groundwater sampling at Lakewood Plaza Cleaners in south Tacoma. Results of volatile organics of samples collected from two municipal wells and seven monitoring wells in January and August 2001 are included.

This progress report is one in a series describing results of long-term groundwater sampling at Lakewood Plaza Cleaners in south Tacoma. Results of volatile organics of samples collected from two municipal wells and seven monitoring wells in January and August 2001 are included.

1. Monitoring wells MW-20B and MW-16A, as well as municipal wells H1 and H2, continue to have tetrachloroethene (PERC) concentrations exceeding the Model Toxic Control Act (MTCA) cleanup standard of 5.0 ug/L. PERC concentrations in these wells during the past year of sampling were MW-20B (486 and 493 ug/L), MW-16A (25 and 31 ug/L), and H1 and H2 (6.8 and 11 ug/L).

2. Trichloroethene (TCE) was detected in MW-20B in January at a concentration of 6.6 ug/L and in August at a concentration of 8.2 ug/L, which exceeds the MTCA cleanup standard for TCE of 5.0 ug/L.

3. Cis-1,2-dichloroethene (cis-1,2-DCE) was detected in wells MW-20B (12 and 18 ug/L) and MW-16A (0.7 and 1 ug/L).

Overall, concentrations are similar to those reported in previous sampling rounds.

Link to EIM data for User Study ID Lakewood