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c <br /> B R O W N A � >� ��,lI�crfifl}���}d�iA�����I-Tfl <br /> 1.4 <br /> � <br /> C A L D W E L L SEF 25 AM li: 28 <br /> September 23, 1996 <br /> Mr Kyle Christie <br /> ARCO Products Company <br /> Post Office Box 612530 <br /> San Jose, California 95161 017-4011-01/1 <br /> Subject Quarterly Groundwater Monitoring Report/Report on Installation of <br /> One Groundwater Monitoring Well,ARCO Products Company(ARCO) <br /> Facility 5450, Stockton, California Site Code 505663 <br /> Dear Mr Christie <br /> On July 30, 1996, Brown and Caldwell (BC) oversaw the drilling, installation, development, <br /> and sampling of one on-site groundwater monitoring well (MW-1) at ARCO Facility 5450 <br /> located at 1617 West Fremont Street, Stockton, California This report serves as a quarterly <br /> groundwater monitoring and sampling report and summarizes the results of the well installation <br /> and well development activities A work plan, dated June 21, 1996 (Appendix A), for this work <br /> was submitted to and approved by San Joaquin County Public Health Services, Environmental <br /> Health Division(PHS-EHD) Figure 1 shows the location of the subject site <br /> The well was installed in response to a letter from the PHS-EHD dated May 6, 1996 A copy of <br /> the May 6, 1996 letter is included as an appendix in BC's June 30, 1996 work plan The <br /> May 6, 1996 letter was prepared in response to the January 24, 1996 "Summary Report of Soil <br /> Sampling During Product Piping Replacement, ARCO Facility 5450, Stockton, California" <br /> prepared by BC The May 6, 1996 letter states"In order to verify groundwater conditions in the <br /> west island area at the northern edge (Sample T14 area), PHS-EHD will require a groundwater <br /> monitoring well to be installed After two consecutive quarterly reports have been received and <br /> evaluated, PHS-EHD will make a decision as to the fixture need of this well" <br /> Site Background <br /> ARCO Facility 5450 is an operating retail gasoline filling station In October 1995, ARCO <br /> replaced the single-wall product line and fiber trench secondary containment system with <br /> double-wall fiberglass product lines Hydrocarbons were identified in the soil beneath the <br /> This report was prepared to accordance with the standards of the environmental consulting industry at the time it was <br /> prepared It should not be relied upon by parties other than those for it horn it was prepared, and then only to the <br /> extent of the scope of work which was authorized This report does not guarantee that no additional environmental <br /> contamination beyond that described in thisreport exists at the site <br /> Environmental Engineering And Consulting Anaiyr cal Services 401 IMEPORTMNSORPT[.DOC <br /> 9616 MICRor A%ENUE SMITE 600 S{CRAMENT0 CA 9)8 2 7 2627 <br /> (916) 433-0123 F;r (916) 856 >277 <br /> I <br /> I <br />