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Tri-Star Homes, Michael Gallager page 2 <br /> 2075 f"ieldview Dr., Tracy <br /> petroleum concentration levels. In order to compl to the site assessment and verify the <br /> groundwater petroleum concentrations, PHS-EHD will review the workplan for the <br /> placement of the monitoring wells. This workplan should be submitted by October 31, <br /> 1997. <br /> If you want to continue the investigation with reco mendations from PHS-EHD, please <br /> provide written notification to our agency of your intentions by October 1, 1997. <br /> At_the completion of the site assessment, a respo Bible party that requests PHS-EHD <br /> oversight for remediation of the soil and/or groun water will be required to enter into a <br /> written agreement with PHS-EHD as outlined in legislation SB-1248 (enclosed). <br /> Currently, investigations at contaminated groundwater UGT sites require the laboratory <br /> analyses for at least five (5) oxygenates by EPA ethod 8260, in addition to analyses <br /> performed in during the preliminary assessment or UGT removal(s). PHS-EHD is <br /> following this UGT recommendation and will require that the oxygenates listed in the <br /> enclosed CVRWQCB memo be included in the continuing site assessment. 4 <br /> hope this clears up the options available to your garding the UGT investigation and # <br /> remediation at this farm UGT site. Please contact Michael infurna, Senior RENS, at 1 <br /> 1 <br /> (209) 468-3454 should you have any questions or wish to discuss the site. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Michael Infurna Jr., Senior REHS Margaret Lagorio, REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> MI/ <br /> enclosures <br /> c: Jonathan Goodmacher- Construction Testing & Engineering, Inc., 2414 <br /> Vineyard Ave. Suite G Escondido CA. 92029 <br /> (w/o enclosure) <br />