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' 5-30-200 10 31 PM FROM P 2 Sent By FaC111tles Management, 209 468 2196, May-24-00 11 26AMr nage 112 To GPf At 93363 PUBLIC HEALTH SERVICES y.ow SAN JOAQUIN COUNTY R E c c I V E GL �Ay� ENVIRONMENTAL HEALTH DIVISION Karen Furst, M-D., M.F.H. Health Officer MAY 18 2000 ' 304 East Weber Avenue, Third Floor • Stockton, CA 95202 209/46&&20 QR&10 OQATA MAY 16 Z= DIRECTOR OF FACILITIES KANACOMNT 212 N SA3T JQAguw ST1RE&T sQITB A STOCKTON CA 95202 RE. San Joaquin County Owned Sites Contaminated from Lealung Underground Storage a¢ Tanks ya On May 1,2000,a meeting was held in the office of San Joaquin County Public Health Services Environmental Hearth Olvision(PHSIEHD)to dracuss the investigations and remedial actions at San Joaquin County owned sites that are oontemrneted from unauthorized releases from air- underground underground storage tanks Lon Duncan and I represented PHS/EHD You, Kerry Wesson,and r Bob McMillen represented the County as the responsible party for the contaminated sites The go following is a summary of the site discussions and PHSJEHD directives for the sites The Airport facility at 5000 S Airport Way Stockton,was not included m the discussions It was discussed Male limited amount of money has been of xoWd by the County for the investtgatton and rerned+abon of these sites It was also discussed that the State of California has recognized that Methyl Ternary Butyl Ether(MTBE)is a risk to the environment and that in order to evaluate site pnorlies the groundwater at each site must be investrgateo 11!10 E N"ELTON,STOCKTON Soll and groundwater contamination of MTBE as well as petroleum hydrocarbon contaminants has been confirmed at this site Currently,this site is of highest priority The vertical and lateral extent of the contamination in the sod and groundwater must be defined In additlon, a survey to ' locate sit wells within 2000 radial feet of this site must be conducted. The Department of Water Resources should be contacted to determine of they have information(well logs)indicating the iocetion and construction of wells wrlhn 2000 radial fest of this site in addition,California Water Servtce should be contacted to Identify the location.Construction,and operation of any wells ' belonging to them within 2000 radial feet of this site Any commercial or industrial sites (Including Diamond Walnut)that have wells should be contacted for information as well as any nearby reaidenGea that may have wells A prlywcal Search of the area may be necessary to make this detemtimation- A work plan to continue the site investigation which Includes the well survey must ' be submitted by July 3 2000 145 S.SUTTER,STOCKTON(Nt1MAN SERVICES) ouarterly sampling and monitoring of the groundwater at this site must continue Analysis for ' oxygenates has not been performed on the groundwater samples collected from the monitoring wells at this site Analysis for MTBE,Ethyl Tertiary Butyl Ether(ETRE).Tertiary Amyl Methyl Ether(TAME),Ternary Butyl Alcohol(TBA),and DwsWropyt ether(DIPS)using EPA Method 8260 must be performed on the groundwater samples collected from the monrtarrng W0113 for this site for two quarters of sampling If oxygenatas ars not detected,the enetyais for them can be drsaoritlinued If oxygenates are detected,arselyale for them must continue until other wLSO directed by PHS/EHD ' pair t=ax Hole 78x1 oro a-.74 14049M a T4 � rm" CoMept, l 0101 Ph"I Phom• Ftp• Fre!