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1 LJ ULlk, 1 1LnL11-1 i-LI1 V 1L,EJ <br /> ah• ��N <br /> SAN JOAQLLN COUNTY <br /> ENVIRON-N NTAL :-IEAILTH DIVISION <br /> Karen Furst, M.D., IM2a, Health Officer <br /> 304 East Weber Avenue, Third Hoor • Stockton, CA 95202 <br /> 209/468-3420 <br /> SSP 2 5 tel, <br /> To Whom It May Concern <br /> ANALYSIS REQUIRED FOR OXYGENATE COMPCUNDS <br /> San Joaquin County Public Heatth Services, Environmental Heaitti Divisfen (PHS/EHD) is under- <br /> Local <br /> Oversight Program (LOP) contra-with he California State Water Resources Control <br /> Board (SWRCS) to provide oversight for the investigation and cleanup of unauthorized releases <br /> from underground storage tanks. .7rds contract includes a provision for techrical support by the <br /> Califcmia Central Vailey Regional Water Quality Control Board (CVRVVQCS). <br /> PHS/EHC has recently received a letter from the CVRWQC8 that prcvides guidance on now to <br /> analyze for the oxygenated compounds in casoilne untli a "definitive protocol" can be <br /> established_ Based on this letter, PHS/E40 is directng you to analyze samples from ail of <br /> your monitoring wells for TertFary Butyl Alcohol (TBA), Methyl Tertiary Butyl E.►rier(MTBE), Di- <br /> iscoropyi ether(DIPS;, Ethyl Tert,ary 9utyi Ener(Ei HE) and Tertiar/Amyl Methyl Eger <br /> 7AME) by EPA method 8260. PHS/EHC will require analysis or samples for Methare( and <br /> Ei:hanol where there is reason to believe that these compounds were stored in the underground <br /> tank(s). <br /> PHS/EHD requires quarterly sampling of all wells where the presence cf 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 samo(e <br /> results are reviewed by PHSIEHO.Any modification of the required sampling must have <br /> PHSiEHD approval prior to implementation. <br /> For additional information please cell your LOP contact: <br /> Donna Heran, REHS, Director <br /> Environmentai Health ONtion <br /> Margaret Lagoric, REHS <br /> LCP Supervisor <br /> enol. <br /> A Dtvtsian of San Joaquin eoumv Realt:�Care Service <br /> 4.. <br />