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WIN <br /> "MA <br /> ER <br /> T - �y —i— ,' _ /r' h' <br /> R Y jJ3�•� we: <br />`L <br /> 5 <br /> �. o� PONfi <br /> ------ ----- <br /> Du 1"ont Environmental Services January 17, 1990 <br /> Job No. 211-010-6 <br /> Mr- Grego.y Fletcher <br /> Conoco Inc. <br /> 600 North Dairy Ashford <br /> ' TR 3038 <br /> Houston, Texas 77079 <br /> I...; SUBJECT: Quarterly Ground-Water Sampling Report <br /> December 1989 <br /> Douglas Gas Station <br /> 900 South Cherokee Lane i <br /> Lodi, California j <br /> Dear Mr. Fletcher: <br /> ! 7 <br /> - p INTRODUCTION <br /> This report presents the results of the quarterly ground-water sampling which was conducted at the Douglas Gas <br /> Station, 900 South Cherokee Lane, Lodi,California (see the Location Map, Figure 1),on December 14, 1989. <br /> I The purpose of this 'sampling program is to monitor and evaluate the extent of hydrocarbon contamination in <br /> the ground water at the subject property. <br /> 1 <br /> SUMMARY <br /> A summary of data regarding ground-water levels for the December, I989 quarter is presented in Table A. In <br /> .�, general,groundwater levels have risen approximately 2.7 feet since the last quarterly sampling. Ground=water <br /> F, flow for this quarter is directed towards the southeast with a gradient of approximately 0.002 (se the Ground- <br /> Water Gradient Map,Figure 2). Monitoringwells MW-8,MW-10,and MW-17 were not sampled because of the <br /> presence of free product. Chernical analytical results have remained relatively stable since the la-t quarter(see <br /> Table B and Appendix B), Figure 3 presents interpretive isopleths of benzene concentrations within the ground <br /> �- water for the site. This site is scheduled to be resampled during March, 1990. <br /> Respectfully submitted, <br /> DU PONT ENVIRONMENTAL SERVICES r, <br /> Mark Vetter David Blunt <br /> .- - Project Geologist --- - Registered Geologist <br /> RG 4516 <br /> M V/DB:cb <br /> U <br /> 7068 Kol!Center Paikw_ay _• Su'le 4al Pleasanion,California 94566 �• (4151462-7772 •�1600)468-2122 •W` FAX(415)_462.7¢44 <br /> Aston.Peir,s➢Ivanla pieasantnn,Callan a_Flarwai'n,C3§lornia Houston,7e�as Baca Rat n.Florida <br />