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PUBLIC�ALTH SER�FCES �Q...� <br /> ~SAiIN JOAQUN COTJ IN J Y . <br /> A W <br /> ENVIMONIEINTAL HEALTH DIVISION <br /> Karen Furst, TNLD., iY -REL, Health Officer == <br /> 304 East Weber Avenue, Thud Floor Stockton, CA 952OZ c,�oR�► <br /> 209/468-3420 <br /> SEP 2 5 1W- <br /> To <br /> -To Whom It May Concern <br /> ANALYSIS REQUIRED FOR OXYGENATE COMPOUNDS <br /> i <br /> San Joaquin County Public Health Services, Environmental Health Division (PHSfEHO) is under <br /> Local Oversight Program (LOP) contract with the Califomia State Water Resources Control <br /> Board (SWRCS) to provide oversight for the investigation and cleanup of unauthorized releases <br /> from underground storage tanks. This contract includes a provision for technical support by the <br /> California Central Valley Regional Water Quality Control Board (CVRWQCS)_ <br /> PHSIEHD has recently received a letter from the CVRWQCS 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, PHSIEHD is directing you to analyze samples from all of <br /> your monitoring wells for Tertiary Butyl Alcohol (IBA), Methyl Tertiary Butyl Ether(MTBE), Di- <br /> isopropyl ether(DIPE), Ethyl Tertiary Butyl Ether(E BE) and Tertiary Amyi Methyl Ether <br /> (TAME) by EPA method 8260. PHSIEHD will require analysis of samples for Methanol and <br /> Ethanol where there is reason to believe that these compounds were stored in the underground s <br /> tank(s). <br /> PHSIEHD 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, RENS, Director <br /> Environmental Health Division <br /> ( _ 4 <br /> Margaret Lagodo, RENS <br /> LOP Supervisor <br /> encl. <br /> A Division of San Joaquin Countv Health Care Services � <br /> I <br />