ARCHIVED REPORTS_XR0011661 - Laserfiche WebLink

Home Browse Search

' source areas The scope of work is discussed in the Field Investigation Work Plan (Treadwell & ' Rollo, 2003b) and included the following tasks • Reviewing pertinent available documents and maps for the 541 Site and potential offsite ' source areas, • Reviewing available aerial photographs of the 541 Site and vicinity, ' • Drilling and logging 27 soil borings to depths ranging from 8 to 19 feet, ' • Collecting and analyzing select soil and groundwater grab samples, and • Preparing this technical report summarizing our findings The shallow soil sample data provided further information on possible onsite source areas and the groundwater grab data was used as a screening tool to delineate water quality across the 541 • Site and adjacent areas The quality of soil and groundwater was compared to Preliminary Remediation Goals (PRGs) and Environmental Screening Levels (ESLs) as discussed in Section 6 1 3.0 SITE BACKGROUND This section provides a brief description of the 541 Site history,previous investigation, potential ' offsite sources and the hydrogeologic setting Additional background information is available in the Site Assessment Report(Treadwell & Rollo, 2003a) 3.1 Site Description The 541 Site is located at 541 West Grant Line Road in Tracy, California (Figure 1) The 16- acre 6- acre property is an elongated strip of land approximately 125 feet wide by 595 feet long with ground surface elevations between approximately 19 to 25 feet mean sea level Currently, the southern portion of the 541 Site, near West Grant Line Road, is developed with a single story icommercial building and adjacent paved parking lot(Figure 2) The building was constructed in ' 2001-02 and is currently occupied by Sherwin Williams and other tenants The northern portion Field Investigation Report 2 8 December 2003 ' TREADWELL&ROLLO,INC