SITE INFORMATION AND CORRESPONDENCE FILE 2

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San Joaquin County DIRECTOR Donna Horan, REHS PA .� Environmental Health Department .O ASSISTANT DIRECTOR 2:' 2 600 East Main Street Laurie Cotulla, REHS U) ILA Stockton , California 95202-3029 PROGRAM COORDINATORS Mike Huggins, REHS, RDI Website: WWW. OV.OY ehd Margaret Lagorio, REHS. WS q � iFp'RA �g / g Robert McClellon, REHS Phone : (209) 468-3420 Jeff Carruesco, REHS, RDI Fax: (209) 464-0138 Kasey Foley, REHS June 8, 2009 Thr Mr. Dante John Nomellini Nomellini Construction P. O . Box 1461 Stockton , CA 95201 Subject: Nomellini Construction Company RO#: 382 1045 W. Charter Way CUF#: 0552 Stockton, CA 95206 APN : 163-230-39 The San Joaquin County Environmental Health Department (EHD) has reviewed Quarterly Report — First Quarter 2009 (QMR) dated May 15 , 2009 , submitted to Geotracker on May 19 , 2009, by your consultant Advanced GeoEnviron mental and has the following comments . The QMR covered the ground water sampling event conducted onsite March 12, 2009, for a modified sampling frequency that was previously approved by the EHD . Recommendations included in the QMR requested that additional monitoring wells also be considered for reduced sampling frequency. The EHD has evaluated the data for MW- 13 and MW- 14 and agrees that the status of the ground water plume could still be adequately monitored if these wells were reduced to 2 ! annual sampling . The modified sampling program is as follows: • Wells MW-2, MW4 , MW-5, MW-6, MW-15 , and EW- 1 shall be sampled semi- annually. • The remainder of the wells are to be sampled annually. • Quarterly reports on the status of the investigation/remediation , activities conducted at the site during the reporting period , and dates when future investigation/remediation at the site will occur are to be submitted to Geotracker. The QMR submitted to the EHD did not include this information . In correspondence dated May 12, 2009 , the EHD approved the Interim Remedial Action Pian ( TRAP) and required you to continue your investigation to define the lateral and vertical extents of impacted soil and ground water. A work plan to continue this work is due on Geotracker 90 days after the start up of the interim remedial action . Please update the EHD on the status of the TRAP.