ARCHIVED REPORTS XR0006582 - Laserfiche WebLink

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requested we will sample monitor wells MW1, MW6 and MW9, the closest wells to the Lincoln Center problem using EPA Metod 601 . Item 1 of the February 18, 1994 letter, recommended a pump test "to determine the effect that extraction may have on the groundwater gradient and hence msgratzon" . In light of the concerns that Lincoln Center has voiced to Wickland Properties and until the Center has defined the extent of their plume, or researched how pumping ground water at former Regal 603 will effect their plume, no ground water pumping should be performed other than the necessary purging of wells to obtain representative water samples from the monitor wells To help define the effectiveness of and the constraints on the remedial actions that have occurred at this site, a brief chronology of events follows : October 24 , 1988 Tank removal sampling, first discovery of an unauthorized release (Applied GeoSystems report dated April 7, 1989 • Limited Subsurface Environmental Investigationat Former Regal Service Station 6425 Pacific Avenue, Stockton, California. November 15, 1988 Submitted Western Geo-Engineers (WEGE) Workplan to delineate gasoline range hydrocarbons, onsite . December 9, 1988 Completion of drilling six exploratory onsite sample borings and converting three borings into ground water monitoring wells At this time floating product was discovered on the ground water at MW3 . Initiate 1/4 ground water monitoring program. December 29, 1988 Workplan to delineated offsite extent of gasoline range hydrocarbons in the ground water, see Western Geo-Engineers report dated February 10, 1989 : Reaal 603 Site Assessment March 3 , 1989 Installed seven additional wells for lateral extent determination. March 15, 1989 Date of letter to Mr Larry Williams, Municipal Utilities Dept , Stockton, CA , requesting to 4