ARCHIVED REPORTS XR0006135 - Laserfiche WebLink

Home Browse Search

1.0 INTRODUCTION 1.1 Background Kwikee Foods is a convenience store and former gasoline filling station located at 2081 Country Club Boulevard in Stockton, California. Figure 1 shows the location of the site, and Figure 2. is a generalized map of the site and surrounding properties. The property is owned by Mr. William Peters, and has been leased out for several years. Investigation of subsurface petroleum contamination was begun in 1994, and in July 2001 Upgradient Environmental Consultants completed a Problem Assessment Report that described the character and extent of gasoline in soil and groundwater. On behalf of Mr. Peters, Upgradient Environmental subsequently submitted a Site Closure Report requesting the San Joaquin County Environmental Health Department (EHD) to close the investigation as a"low-risk groundwater case". 1.2 Purpose EHD denied the closure request in January 2002 and directed Mr. Peters to continue groundwater monitoring through the second quarter of 2002. Reports were submitted in March and June, and EHD completed its review of these in September. In subsequent correspondence, EHD concluded that the information was insufficient for site closure, and requested either a work plan for additional investigation or an updated closure request presented in the context of a site conceptual model that more effectively demonstrates the conclusions provided in previous reports. Therefore, the purpose of this report is to present a more detailed and thorough analysis of the origin and evolution of gasoline contamination at the site and to provide convincing evidence that further investigation is unnecessary. 1.3 Data Analysis Whereas previous reports have been based primarily on data collected from the Kwikee Foods property, this report includes considerable analysis of the data generated at the former Chevron gasoline station located across the street at 2103 Country Club Boulevard. That site has been under investigation since 1986, and has been undergoing remediation since 2000. Recently, boring logs for several of the monitoring wells at that site were obtained from SECOR, Inc (Appendix A), and water depth and groundwater analytical data for the wells at that site have been obtained from the Regional Water Quality Control Board (Appendix B)..These data have been integrated with data from the Kwikee Foods site to generate numerous maps, cross sections, and graphs for this report. It was not possible, however, to obtain and review all of the potentially useful data generated at the Chevron site within the time frame set by VHD for submission of this report. 1.4 Organization of this Report . 3 _ .