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PUBLIC HEALTH SERVICES ,pppU�N <br /> . SAN JOAQUIN COUNTY ` <br /> ENVIRONMENTAL HEALTH DIVISION N ` <br />` Karen Furst, M D , M PH , Health Officer • C _ _- '�P <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> FRANK GUINTA JAMES RAMSEY <br /> 2072 W YOSEMITE AVE 840 LA CONTENTA DRIVE <br /> MANTECA CA 95335 VALLEY SPRINGS CA 95252 <br /> I <br /> RE FRANKS EXXON SITE CODE 1426 <br />' 2072 W YOSEMITE AVE <br /> MANTECA CA <br /> San Joaquin County Public Health Services En%ironmental Health Division (PHSfEHD) has recently <br /> reviewed the Aqua Science Engineers Inc (ASE) reports of domestic well sampling and analyses in close <br /> proxinuty to the site referenced above As a result of revieNving the report PHSIEHD provides the following <br /> comments and directives <br /> Through previous reports ASE has established the potential risk to nearby receptors Greater than 50 <br /> shallow drinking water wells are present within 2000 feet of this site Groundwater on-site and off-site is <br /> impacted with fuel hydrocarbons including free-phase in monitor well #5 (MW-5) Between <br />' August 3, 2000 and August 14, 2000 samples and analyses from four domestic wells document impacts by <br /> fuel hydrocarbons To date the following domestic`veils at the addresses in Manteca,California listed <br /> below are known to be contanunated <br /> Address MtBE TBA 1,2-DCA 1,2-DCP <br /> 17911 Airport Way 22 <br />' 17926 Aurport Way 68 74 <br /> 17933 Airport Way 64 071 <br /> 17950 Airport Way 82 068 <br />' Additional drinking water wells to the north (down gradient in the upper aquifer) and south(down gradient <br /> in the deeper zones of the aquifer) shall be sampled, analyzed and results reported to PHS/EHD <br /> immediately after gaining permission to sample Wells located at 17793, 17783, 17821, 17904, 17850, <br />' 214, 18097, 18113, and 248 Airport Way and 2062 Yosemite Avenue (as shown on ASE Receptor Survey <br /> Plot) are approved for immediate sampling Other water wells may require sample collection and analyses <br /> as the groundwater plume is defined Full scan EPA Method 8260 analyses is recommended Twenty-four <br /> hour analyses reporting is required for all unitiaf well samples PHS/EHD has contacted (August 8, 2000) <br />' the City of Manteca(Diane Martin, City Engineer) regarding the fuel hydrocarbon groundwater plume and <br /> has requested sample analytical results from Municipal Well # 16 All consumers and property owners at <br /> known contarrunated wells are required to be notified and supplied with a reliable potable water supply by <br />' the responsible party You are required to provide PHS/EHD with written documentation of notices <br /> and information regarding to whom potable water has been supplied (Names and addresses of <br /> tenants and dates of notices and supply of potable water) within 48 hours of completing this task. <br /> Please continue to sample all monitor wells and at risk domestic wells on a quarterly basis until <br /> further written notice from this office <br /> iAdditional groundwater monitor wells and remediation feasibility test wells are scheduled to be installed <br />' beginning August 15,2000 as approved by PHS/EHD on June 29, 2000 Feasibility testing is scheduled for <br /> start up beginning August 17, 2000 Additional monitor weIIs and continuous core boreholes will be <br /> required to monitor and document plume migration at this site Please submit additional workplans as <br /> needed <br /> A Dn ision of San koaquin County Health Care Services <br />