SITE INFORMATION AND CORRESPONDENCE_CASE 2

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r1 y � , ATTACHM NT A 707 E. YOSEMITE AVE. MANTECA,CA 95336 Investigation Report Steve Sasson, Senior R.E.H.S.;Jeffrey Wong, .E.H.S. San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) 304 E.Weber Avenue,Third Floor Stockton,CA 95202 i (209) 468-0335 ' On February 17, 1999, Steve Sasson witnessed the removal of two 8,000 gallon petroleum underground storage tanks (UST), and one 10,000 gallon UST from the above referenced site. Soil samples were collected from the excavation,dispenser area, and stockpiles for laboratory analyses On March 17, 1999, Steve Sasson and Matt P ker witnessed the installation of new USTs at the site. On March 22, 1999, Krazan&Associates azan), contracted by Ecology Control Industries (ECI) who was retained by Pontes uicki-Kleen Carwash, collected additional soil samples in the dispenser area for laboratory analyses without notification and presence of PHS/EHD staff Krazan also over-excavated approximately 29.63 cubic yards of contamin ted soil (10 feet by 10 feet by 8 feet deep)beneath the east dispenser island, and 41.44 cubic yards of contaminated soil (10 feet by 12 feet by 10 feet deep) beneath tl te West dispenser islands at the site without PHS/EHD knowledge or approval. Steve Sasson was subsequently notified of the over-excavation in a telephone convey ation with Krazan representatives on the same day. On March 25, 1999, Steve Sasson directed Bruce Myers of Krazan to submit the sampling analytical report with an addendum explaining the events of March 22, 1999 to ECI. On March 26, 1999, Krazan submitted a cop of the report of the analytical results of the soil samples collected on March 22, 19 99 via facsimile. On April 23, 1999, Steve Sasson noted the excavated soil had been placed on the adjacent lot east of Pontes Quicki-Kleen Carvash site. He also noted that the excavation had been filled. The material used to fill the excavation has not been reported.