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Site Background Information - Grewal's Market Page 4 of 6 Installation Report - I" Quarter 2000, dated 24 April 2000. Laboratory analysis of MW-2 and MW-3 soil samples detected TPH-g, TPH-d and BTEX compounds at concentrations as high as 68 mg/kg, 480 mg/kg and 1.8 mg/kg, respectively; MTBE concentrations were detected from wells MW-1, MW-2 and MW-3 soil samples at concentrations as high as 0.89 mg/kg. Analytical results of soil and ground water samples are summarized in Tables 2 and 3. • November and December 2000 - AGE conducted a sensitive receptor survey to locate potential vertical conduits within a 2,000-foot radius of the site. The results of the sensitive receptor survey did not locate any municipal water wells within 2,000 feet of the site, however, several domestic, irrigation and industrial water wells were located within a 2,000-foot radius of the site. Results of the investigation were reported in the AGE-prepared Sensitive Receptor Survey, dated 11 January 2001. Sensitive receptor survey results are summarized in T . A map illustrating sensitive receptor locations within 2,000 feet of the site it s depicted on Fig 9. • January 2002- Three soil borings (P-10, P-11 and P-12)were advanced at the site to depths of 90 feet bsg assess the lateral and vertical extent of petroleum-impacted soil and ground water. Laboratory analysis of the P10-40 soil samples detected TPH-g, TPH-d and xylenes at concentrations of 220 mg/kg, 3,300 mg/kg and 0.38 mg/kg, respectively. TPH-d and BTEX were detected in the P11-45, P12-45 and P12-55 foot soil samples at concentrations as high as 7.7 mg/kg and 0.053 mg/kg, respectively. Additionally, MTBE was detected in the P11-45 foot sample at a concentration of 0.012 mg/kg. Laboratory analysis of grab water samples collected from P-10, P-11 and P-12 detected TPH-g and TPH-d at concentrations as high as 350 pg/I and 510 pg/I, respectively. Additionally, BTEX and MTBE were detected at concentrations as high,as 47'tag/I and 4.9 pg/I, respectively, while TBA was detected from P-11 at a concentration of 23 pg/I. Analytical results of soil and grab ground water samples are included in Tables 2 and Al. Results of the January 2002 investigation were reported in Quarterly Report-First Quarter 2002, dated 17 July 2002, prepared by AGE. • April 2006-Two cone penetration testing (CPT) soil borings (CPT-01 and CPT-02) were advanced to maximum depths of 100'feet bsg at the site to assess the lateral and the vertical extent of petroleum-impact and to identify potential hydrogeologic units. Based on CPT data, AGE interpreted the CPT data to identify the vadose zone (0 to 40 feet) and three potential hydrogeologic units informally identified as Hydrogeologic Units 1, 2 and 3 at depths between 40 to 55 feet bsg, 55 to 65 feet bsg and 65 to 100 feet bsg, respectively. Analytical results of grab water samples are summarized in Table Al. A report of findings (Cone Penetrometer Testing Site Investigation - April 2006, dated 30 May 2006) was submitted by AGE to the SJCEHD. Advanced GeoEnvironmental,Inc.