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M San Joaquin County DIRECTOR Donna Heran, REHS �O.P�'a. .'=" :•.pC� Environmental Health Department ASSISTANTDIRECTOR Qi 600 East Main Street Laurie Cotulla, REHS Stockton , California 95202-3029 PROGRAM COORDINATORS i Carl Borgman, REHS Mike Huggins, REHS, RDI cq �FOFd\P Website: wwwSigov.Ory/ehd Margaret Lagorio, REHS Phone: (209) 468-3420 Robert McClellon, REHS Fax : (209) 464-0138 Jeff Carruesco, REHS, RDI Kasey Foley, REHS DANTE JOHN NOMELLINI C.iIJL $ 7 20 NOMELLINI CONSTRUCTION PO BOX 1461 wT � STOCKTON CA 95201 RE : Nomellini Construction Company Site Code: 1779124 1045 W . Charter Way RO# : 382 Stockton , CA. 95206 SWRCB-CUF#: 000552 On July 24 , 2007 , a meeting was held at the offices of the San Joaquin County Environmental Health Department (EHD) to discuss the above referenced site and the June 8 , 2007, EHD correspondence concerning the site . The meeting participants were you and Scott Solari from Nomellini Construction, Bob Marty, Bill Little and Art Deicke from Advanced GeoEnviron mental Inc, and Margaret Lagorio , Nuel Henderson and Michael Infurna from EHD. The EHD understands your reasoning for not having MW-3, 4, 5, 7 , 8, 9 , and 11 destroyed at this time and rescinds that directive. The EHD requests that your consultant prepare a discussion of the hydrological units shown and discussed in their reports and justify that the wells that are screened across more than one hydrological unit do not provide a cross contamination pathway. Please include this discussion in the work plan to be submitted to the EHD for the next phase of investigation for the site. It was agreed at the meeting that remediation of the area of high dissolved petroleum concentrations , the core, should be started as soon as possible . It was further agreed that your consultant would submit a work plan to conduct pilot tests for feasible remedial alternatives. At the meeting the remedial alternatives of excavation , dual phase extraction and groundwater extraction were discussed . Vapor extraction and air sparging have been performed at the site and groundwater has risen to a level where they are no longer feasible remedial alternatives. EHD informed you that the most cost effective remedial action should be performed . In addition to an evaluation of remedial alternatives , it was discussed at the meeting that for now at least three additional deep monitoring wells in different areas of the site are to be installed to further investigate and delineate the extent of the dissolved petroleum plume.