Laserfiche WebLink
ENVIRONMENTAL HEALTH DEPARTMENT <br />• oP�"'" SAN JOAQUIN COUNTY <br /> s T���.:` Unit Supervisors <br /> Donna K.Heran,R.E.H.S. <br /> 304 East Weber Avenue, Third Floor Car]Borgman,R.E.H.S. <br /> ' Director Mike Huggins,R.E.H.S.,R.D.I. <br /> Ai Olsen,R.E.H.S. Stockton, California 95202-2708 <br /> Douglas W.Wilson,R.E.H.S. <br /> • �.•. CP Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Fo-aa p Robert McClellon,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Fax: (209) 464-0138 <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> NICK NICKERSON JUL 3 12003 <br /> UNION OIL COMPANY OF CALIFORNA <br /> 8778 ELK GROVE BLVD BLDG 3 STE 15 <br /> ELK GROVE CA 95624 <br /> RE: Former Unocal#2859 SITE CODE: 1213 <br /> 1665 Pacific Avenue <br /> Stockton, CA <br /> San Joaquin County Environmental Health Department(EHD)has reviewed quarterly monitoring <br /> reports for the above referenced site. Analytical results of groundwater samples from off site <br /> monitoring well MW17 (screen interval 50'to 60')show concentrations of 1, 2-DCA as high as 280 <br /> ug/L. Groundwater samples from monitoring well MW 18 (screen interval 85' to 90) next to <br /> MW17 has had concentrations of;1,2-DCA as high as 16 ug/L. Groundwater samples from MW19 <br /> (screen interval 85'to 90')that is down gradient of MW17 and MW18 have had concentrations of <br /> 1,2-DCA as high as 3.6 ug/L. The only on site monitoring well that has had concentrations of 1,2- <br /> DCA is MW11 (screen 50' to 60'). This site must be evaluated as the source of the 1,2 DCA. In <br /> addition, remediation required for the 1,2 DCA must be evaluated. This information should be <br /> submitted to EHD by October 1, 2003. <br /> If you have any questions contact me at(209)468-3449. <br /> Donna Heran, RENS, Director <br /> Environmental Health Department <br /> Margaret Lagorio, Supervising REHS <br /> Unit IV/LOP <br /> f <br /> c: CVRW QCB—Jim Barton <br /> San Joaquin County Deputy District Attorney, David Irey j <br /> Helen McCrary <br /> i <br /> i <br /> I <br /> l <br /> I <br /> f I 4 <br /> . �I <br />