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s "1 <br /> f. <br /> 7-Eleven/Stockton 11 <br /> May, 1989 <br /> The water level in MW-4 rose gradually during this reporting <br /> period. During the March 22, 1989 monitoring, product sheen was <br /> observed. Monitoring well (MW-3) , which previously contained <br /> free product, remained dry during this reporting period. No <br /> other free product was observed. <br /> GROUNDWATER SAMPLING AND ANALYSES <br /> sampling of the groundwater monitoring wells and nearby <br /> domestic wells was performed on five separate occasions during <br /> this reporting period. Samples were collected in accordance with <br /> GTI's standard operating Procedures (SaPs) 9, 10, 11 and 12 <br /> (Appendix B) . Each sample was analyzed for benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) and for total petroleum <br /> hydrocarbons (TPH)-as--gasoline by modified 'U.S. Environmental <br /> Protection Agency (EPA) Methods 5030/ 8020/8015. The sampling <br /> schedule during this period for the wells on and near the site, <br /> was as follows: <br /> i <br /> o Monitoring wells and pumping wells which previously <br /> were shown to have no free product were sampled twice a <br /> month starting with a sampling round on January 23, <br /> 1989. <br /> o Domestic wells 9160, Tomato Growers (TMG) , 1927, 1912, <br /> and 8968 were sampled twice a month starting with the <br /> sampling round on January 23, 1989. <br /> w o Domestic wells 9140, 91.59, 9156, 9167, and Ivy Motel <br /> were sampled once during each month starting with the <br /> sampling round on February 3, 1989. <br /> The results of the laboratory analyses of the groundwater <br /> samples for this reporting period are summarized in Table 2 <br /> (Appendix A) . The laboratory reports and method detection limits <br /> (MDL) for the BTEX and TPH-as-gasoline analyses performed are <br /> presented in Appendix C. <br /> Cs GRI1[:NIAVATER <br /> TeCH�nLuc1',INC. <br />