ARCHIVED REPORTS XR0005963 - Laserfiche WebLink

Home Browse Search

1.0INTRODUCTION • Kwikee Foods is a convenience store and former gasoline fillip station located on Count Club g g Country Boulevard in Stockton, California. The property is owned by Mr. William Peters, and has been leased out for several years. Following the discovery of gasoline in groundwater beneath the site in 1990, the site was placed in the Local Oversight Program of San Joaquin County Department of Health Services, Environmental Health Division (PHS/EHD) and assessment of the extent of contarnination was initiated. Mr. Peters retained Upgradient Environmental Consultants in 1994 to install two additional monitoring wells and begin quarterly groundwater monitoring. Mr. Peters retained SEMCO, Inc. to remove the two underground gasoline storage tanks in 1998, and shortly thereafter Upgradient Environmental completed the assessment of soil contamination by drilling five borings around the perimeter of the UST excavation. Upgradient Environmental installed four additional wells in the third quarter of 2000, completing the assessment of groundwater contamination on the property and downgradient from it. Groundwater monitoring in September 2000 indicated that groundwater contamination is present in the southwestern quarter of the site and increases in an uprgradient direction to the southwest of the site, suggesting that an off-site source on the west side of Franklin Street or south side of Country Club Boulevard is the source of groundwater contamination at Kwikee Foods. This interpretation was tested further during the fourth quarter, and the results are presented in this report. 2.0 BACKGROUND INFORMA'IC>i N • 2.1 Site Location and Description The project site is located at 2081 Country Club Boulevard in west-central Stockton. The location of the site is shown in Figure 1, and the site facilities are shown in Figure 2. The site is located in a residential/commercial -area, and the local topography is flat. A Chevron gasoline station was formerly located across Franklin Street from the site. The station has been demolished and remediation of the site,is scheduled to begin shortly. 2.2 Regulatory Directives San Joaquin County PHS/EHD has requested Mr. Peters to expand the investigation of groundwater contamination in order to more fully delineate its extent. Upgradient Environmental initially submitted a work plan for groundwater assessment in October 1997, proposing four new wells'. After a series of delays,the wells were installed during the third quarter of 2000 and sampled during September. The second set of water samples from the new wells was collected in December, and the original three wells were also sampled at that time. 2