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t • <br /> 508 West Charter Way <br /> Page 2 of 2 <br /> ARCADIS BBL proposed that the groundwater samples be analyzed for total petroleum <br /> hydrocarbon quantified as gasoline (TPH-g); TPH quantified as diesel (TPH-d); TPH <br /> quantified as motor oil (TPH-mo); benzene, toluene, ethylbenzene, and total xylenes <br /> (BTEX); tertiary butyl alcohol (TBA), methyl tertiary-butyl ether(MTBE), ethyl tertiazy- <br /> butyl ether (ETBE), tertiary-amyl methyl ether (TAME), and 1,2-dichloroethane (1,2- <br /> DCA). In addition to these compounds, EHD directs that groundwater samples collected <br /> from the new wells also be analyzed for di-isopropyl ether (RIPE) and 1,2- <br /> dibromoethane (EDB) during the initial sampling event. If these analytes are not detected <br /> during the first sampling event, then DIPE and EDB may be omitted from the analyte list <br /> for future sampling events for all monitoring wells. <br /> Please address EHD's comments in writing by September 5, 2007, and contact Vicki <br /> McCartney at (209) 468-9852 or by email at vmccar-tnev@t)sjcehd.com if you have any <br /> questions regarding this letter. <br /> Donna Heran,REHS, Director <br /> ( <br /> Environmental Health <br /> Department <br /> Victoria L. McCartney, Senior REHS �/ ���— <br /> Unit N-Site Mitigation Nuel enderson, Jr., PG <br /> Engineering Geologist <br /> Unit N- Site Mitigation <br /> c: David M. Evans—ARCADIS BBL <br /> James L.L. Barton, PG - CVRWQCB <br />