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TM <br /> r , {_ <br /> fvg'wren <br /> S- IS �iti, f1t,L,[ <br /> .� <br /> AD �a <br /> 11"110 PI'l 05 <br /> January 5, 1994 <br /> Ms Brooke Birkie <br /> Neumiller & Beardslee <br /> 509 West Weber Avenue, Fifth Floor <br /> Stockton, California 95201-3020 <br /> Dear Ms Birkie. <br /> DECEMBER 1993 QUARTERLY GROUNDWATER SAMPLING AND ANALYSIS <br /> CONDUCTED AT 4555 NORTH PERSUING AVENUE IN STOCKTON, CALIFORNIA <br /> Enclosed please find the results of the December 1993 quarterly groundwater sampling and <br /> analysis conducted at the former cardlock refueling facility located at 4555 North Pershing <br /> Avenue in Stockton, California This work was conducted in accordance with the State Water <br /> Resources Control Board Leaking Underground Fuel Tank (LUFT) and Regional Water Quality <br /> Control Board (RWQCB) Guidelines for the preliminary evaluation and investigation of <br /> underground tank sites <br /> Petroleum hydrocarbons as gasoline were not detected in groundwater samples collected from <br /> the five monitoring wells at the site Concentrations of benzene were detected in groundwater <br /> samples collected from monitoring wells MW2, MW3 and MW4 at concentrations of 5 4 <br /> micrograms per liter (µg/1), 4 4µg11 and 380 pg/l, respectively. The groundwater flow direction <br /> was determined to be to the northeast during the December 1993 groundwater sampling event <br /> If you have any questions regarding this report, please do not hesitate to call either of us at (5 10) <br /> 521-5200 <br /> Sincerely, <br /> IJ M Christensen, REA Christopher S Alger, C E G <br /> Nfanager, Environmental Assessments Senior Geoscientist <br /> Principal Geoscientist <br /> Enclosure <br /> cc Michael Collins <br /> Elizabeth Thayer <br /> Thomas Potvien <br /> Peter Martin <br /> 12201cd6 <br /> 1135 Adanuc Avenue,Alameda,CA 94501 (5I0)521-5200 FAX(510)521-1547 <br />