SITE INFORMATION AND CORRESPONDENCE

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JOSEPH & ROSANNA PANETTA 95 West 111h Street Page 2 of 3 Soil borings B-6 through B-9 were advanced in Adams Street west and north of the site in July 2003; impacted soil was encountered in each boring at approximately 13 feet bsg and grab ground water samples collected from each boring were also impacted. Additional soil was excavated north of the original excavation in October 2003, an estimated 300 cubic yards of impacted soil were removed. During excavation, a UST was discovered near MW -2. The discovered UST was removed under permit on 03 November 2003. Soil samples from the north and south walls and floor of this UST excavation did not contain detectable concentrations of petroleum hydrocarbons, but the sample from the south portion of the east wall was impacted. This impacted soil, along with approximately 370 cubic yards of additional impacted soil was excavated in November 2003. Soil samples collected from the north portions of the enlarged excavation did not contain detectable concentrations of petroleum hydrocarbons. Soil samples were not collected from the floor of the excavation due to ground water filling the bottom of the excavation locally to depths as great as 3 feet, therefore it is not known if all impacted soil on the subject site has been removed. Monitoring wells MW -1, MW -2, MW -3 and MW -4 were destroyed for or as a result of excavation. AGE concluded and/or recommended the following: • Implementation of a work plan to assess the lateral and vertical extent of petroleum hydrocarbon -impacted groundwater; • Installation of proposed ground water monitoring wells; • Abandonment and replacement of MW -5 due to a damaged grout seal • Reinstallation of the destroyed monitoring wells to evaluate the effect of the soil excavation; • Discovery of the 500 -gallon UST explains the raising contaminant concentrations in MW -2 and qualifies the site for the Underground Storage Tank Cleanup Fund (USTCF). • Remaining impacted soil underlies Adams Street, some of which came from the former Chevron site; • Hydrocarbon -impacted ground water is under the western boundary of the site; and • Ground water extraction or insitu remediation techniques should be pilot tested and evaluated for use on the site. EHD concurs with the recommendations to implement the previously approved work plan to assess the lateral and vertical extent of impacted groundwater, the destroyed wells should be replaced - as was a condition for their destruction; the damaged monitoring well MW -5 should be properly destroyed and replaced, and additional ground water monitoring wells will be required to adequately characterize and monitor the plume of impacted ground water.