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Phase 11 Environmental Site Assessment Multi-Modal Station Stockton,San Joaquin County,Caltfomia Page 12 • No groundwater samples were collected from detection borings DBK5-843-1 and DBK5- 843-2 Access to this property (843 E Weber Avenue) was terminated by the property owner's legal council subsequent to the advancement of these borings but before groundwater elevation data and groundwater samples could be collected Access to the property was granted three days after the advancement of the borings for purposes of grouting the open boreholes No visual or PID indications of contamination were noted during the investigation activities at Block 5 5.2.7 Block 6 From May 28 to May 29, 2002, five Geoprobe borings and four detection borings were installed on three parcels of Block 6 Geoprobe, detection, and hydropunch boring locations for Block 5 is presented in Figure 11, Appendix A One detection boring(DBK6-128-1)was installed at 128 N Aurora, a paved parking area ➢ Two Geoprobe borings (GBK6-915-1 and GBK6-915-2) and one detection boring (DBK6-915-1) were installed inside the building at 915 E Weber Avenue, an auto body repair shop ■ Detection boring DBK6-915-1 met refusal at a depth of 20 feet bgs and therefore, groundwater samples were not collected ➢ Three Geoprobe borings (GBK6-931-1 through GBK6-931-3) and two detection borings (DBK6- 931-1 and DBK6-931-2)were installed at 931 E Weber Avenue ■ Detection boring DBK6-931-1 was installed in the parking area comprising the southern portion of the property and the remaining borings were installed inside the building occupying the northern portion of the property o A strong odor and elevated PID readings were noted at GBK6-931-1, the first Geoprobe boring advanced inside of the building located at 931 E Weber Avenue The boring location was selected to correspond to an existing hole in the concrete floor in the northwest corner of the building The impacted soil did not appear to be widespread as no indication of contamination was observed in the adjacent borings GBK6-931-2 and GBK6-931-3, located approximately six and 20 feet away from GBK6-931-1, respectively 5 2.8 Laboratory Analytical Results The laboratory analytical results for the soil and groundwater samples collected from the direct push borings are presented in Tables 1 through 10, in the following sections The results of the soil and groundwater samples collected from the borings advanced in the right-of-way are presented separately with respect to the results of the soil and groundwater samples collected from private properties and are located in Tables 1 and 2 The results of these soil and groundwater samples collected from private properties are presented in separate tables for each one-block portion of the site (Tables 3 through 10) The sample identification indicates the boring designation, parcel street addresses, and depth(s) or date of sample collection For the purposes of this report, the tables only contain data for constituents that were detected at or above the laboratory reporting limits in at least one sample from a given block Tables presenting the complete laboratory analytical results are included in Appendix E Copies of laboratory analytical results and chain- of-custody records for the samples are included in Appendix F w �+c� CONDOR