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. Samples were collected on July 23-24, 1997 from one municipal well (H2) and seven monitoring wells: MW-16A, MW-20A, MW-20B, MW-27, MW-31, MW-33, and MW-19A. All samples were analyzed for volatile organics (VOAs).

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 23-24, 1997 from one municipal well (H2) and seven monitoring wells: MW-16A, MW-20A, MW-20B, MW-27, MW-31, MW-33, and MW-19A. All samples were analyzed for volatile organics (VOAs).

Monitoring wells MW-20B and MW-16A, as well as municipal well H2, continue to have elevated PERC concentrations. PERC concentrations in these wells were: MW-20B (222 µg/L), MW-16A (47 µg/L) and H2 (8.8 µg/L). Cis-1,2-DCE was also detected in wells MW-20B and MW-16A at concentrations of 6.4 µg/L and 2.5 µg/L, respectively. TCE was detected in MW-20B at a concentration of 4 µg/L. Model Toxic Control Act (MTCA) cleanup levels were exceeded for PERC (5.0 µg/L) in MW-20B, MW-16A and H2. Overall, concentrations are similar to those reported in previous sample rounds.