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i <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY6 <br /> ENVIRONMENTAL HEALTH DIVISION <br /> I Karen Furst, M D , M PH , Health Officer 'V_ <br /> 304 East Weber Avenue, Third Floor Stockton, CA 95202 <br /> 2091468-3420 <br /> FRANK GUINTA JAMES RAMSEY <br /> 2072 W YOSEMITE AVE 840 LA CONTENTA DRIVE <br /> MANTECA CA 95336 VALLEY SPRINGS CA 95252 <br /> RE FRANKS EXXON SITE CODE 1426 <br /> 2072 W YOSEMITE AVE <br /> IMANTECA CA <br /> San Joaquin County Public Health Services EnN ironmental Health Division (PHS/EFID) has recentl} <br /> reviewed the Aqua Science Engineers Inc (ASE) reports of domestic ,,%ell sampling and analyses in close <br /> proximity to the site referenced abo,.e Asa result of reviewing the report PHS/EHD provides the following <br /> comments and duectnes <br /> I 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 wells at the addresses in Manteca, California listed <br /> below are known to be contarrunated <br /> Address MtBE TBA 1,2-DCA 1,2-DCP <br /> 17911 Ai ort Wa 2 2 <br /> 17926 Anport Way 68 7 4 <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 initial 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 /> I has requested sample analytical results from Municipal Well # 16 All consumers and property owners at <br /> known contaminated wells are required to be notified and supplied with a reliable potable water supply by <br /> the responsible party You are required to protide PHSIEHD iiitln ~Fatten documentation of notices <br /> I and information regarding to v hom potable hater has been supplied (Names and addresses of <br /> tenants and dates of notices and supply of potable crater) ccithin 48 hours of completing this task <br /> Please continue to sample all monitor wells and at risk domestic dells on a quarterly basis until <br /> further iiritten notice from this office <br /> Additional groundwater monitor wells and remediation feasibility test yells 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 tip beginning August 17, 2000 Additional monitor wells 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 Digision of S-in Joaquin Countv Heilth Care Ser%icLs <br />