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PUBLIC hEALTH SERVES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 9520Z� <br /> 2091468-3420 <br /> JERRY MOORE OCT 3 0 W7 <br /> MOORE PETROLEUM <br /> P O BOK 67 <br /> BANTA CA 95304 <br /> RE: Pranks Exxon #4 SITE CODE: 1600 <br /> 14800 Hwy 99 <br /> Manteca, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has <br /> reviewed the"Second Quarter 1997 Groundwater Monitoring Report"dated September 11, 1997 <br /> prepared by Apex Envirotech, Inc. (Apex). <br /> A water sample was obtained from the drinking water well located at 14852 S. Highway 99, <br /> Manteca on May 29, 1997. The analysis results of the water sample evidenced 62 micrograms <br /> per liter (ug/1) Total Petroleum Hydrocarbons as gasoline, 2.7 ug/l xylenes, 2 ug/l 1,2 <br /> Dichloroethane , and 10 ug/l methyl tertiary butyl ether. PHS/EHD has been verbally notified by <br /> Apex that another water sample taken from this well in August 1997 did not evidence any <br /> contaminants. The property owner should be provided these sample results and contacted <br /> regarding the construction details of this well . In addition, further sampling and analysis of the <br /> water from this well must be conducted. Based on all information obtained a decision as to <br /> whether this well should be replaced will be made. <br /> Analysis of the water samples from this site for oxygenates using EPA Method 8260 has not been <br /> conducted. Enclosed is a letter dated September 25, 1997 from PHS/EHD directing responsible <br /> parties to analyze samples from all of their monitoring wells for specific oxygenates using EPA <br /> method 8260. This sampling and analysis must be performed prior to requesting closure of this <br /> site. <br /> The quarterly report did not contain the quality assurance/quality control data sheets from the <br /> laboratory for the samples obtained from monitoring wells 1 through 5. Also the chain of custody <br /> for the samples collected on .lune 14, 1997 was not provided in the report. Please submit these <br /> data sheets to PHS/EHD immediately. <br /> If you have any questions contact me at(209) 468-3449. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Margaret L.agorio, Supervising REHS <br /> Site Mitigation Unit <br /> Enclosure <br /> c: CVRWQCB - Beth Thayer-without enclosure <br /> Apex <br /> Timothy Rhode, 14888 Seminole Way, Manteca <br /> A Division of San foaquin County Health Cue Services <br />