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 31, 1996 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).

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 31, 1996 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).

Wells MW-20B and MW-16A are the only wells in which PERC, TCE and cis-1,2-DCE concentrations continue to be elevated. Concentrations is well MW-20B were 387 mg/L, 7.6 mg/L, and 15 mg/L, respectively. PERC and cis-1,2-DCE concentrations in MW-16A were 43 mg/L and 1.9 mg/L, respectively. PERC was detected below the practical quantitation limit of 1 mg/L in wells MW-20A and H2, as well as for TCE in MW-16A. Model Toxic Control Act (MTCA) cleanup levels were exceeded for tetrachloroethene (5.0 mg/L) in MW-20B and MW-16A and for trichloroethene (5.0 mg/L) in MW-20B. Overall, concentrations are similar to those reported in previous sample rounds.