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PUBLIC H ALTIH SERVIGNS <br /> SASH JOAQUI N COUNTY r" •' :x <br /> ENVERONMENTAL HEALTH D SION <br /> Karen Furst, M.D., M.P.H., Health Officer • �. :. <br /> 344 East Weber Avenue, Third Floor - Stockton, CA 95202 <br /> 209/468-3420 <br /> SEP 2 5 X997, <br /> To Whom It May Concem d "� <br /> ANALYSIS REQUIRED FOR OXYGENATE COMPC UNDS r � <br /> San Joaquin County Public Health Services, Environmental Health Division (PHSIEHD) is under <br /> Local Oversight Program (LOP) contract with the Cal fomia State Water Resources Control <br /> Board (SWRCB) to provide oversight for the investigation and cleanup of unauthorized releases <br /> from underground storage tanks. This contract includ Bs a provision for technical support by the <br /> Califomia Central Valley Regional Water Quality Con of Board (CVRWQCS). <br /> PHSIEHD has recently received a letter from the CV WQCB that provides guidance on how to <br /> analyze for the oxygenated compounds in gasoline until a"definitive protocol" can be <br /> established. Based on this letter, PHS/EHD is dire ng you to analyze samples from all of <br /> your monitoring wells for Tertiary Butyl Alcohol (TBA) Methyl Tertiary Butyl Ether(MTBE), Di- <br /> isopropyl ether (DIPS), Ethyl Tertiary Butyl Ether( E) and Tertiary Amy[ Methyl Ether <br /> (TAME) by EPA method 8260. PHS/EHD will require analysis of samples for Methanol and <br /> Ethanol where there is reason to believe that these c mpounds were stored in the underground <br /> tank(s). ��� �p�s,,•`q�-� <br /> PHS/EHD requires quarterly sampling of all wells where the presence of oxygenates is <br /> confirmed by EPA method 8260. Modification of this required sampling such as number of wells <br /> sampled, sampling frequency and method of analysis may be granted only after initial sample <br /> results are reviewed by PHSIEHD. Any modification of the required sampling must have <br /> PHSIEHD approval prior to implementation. <br /> For additional information please call your LOP contact <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> 4 <br /> Margaret Lagorio, REHS <br /> LOP Supervisor <br /> encl. <br /> A Division of San Joaquin County Health Care Services <br />