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ggggg <br /> WIN <br /> Lang ersville School District <br /> 202/799-8221 <br /> July 28, 1987 <br /> �. GROUNDWATER MONITORING <br /> n The sitN hits been monitored on three occasions to obtain <br /> lid to inspect For the presence of <br /> depth to water measurements a <br /> fres: floating Product . The <br /> and second monitorings were <br /> conducted an .lune 19 and .June 22 , 1987 , respectively- The third <br /> eted on June 24 , 1987. The monitorings were <br /> monitoring was compl <br /> (seQ Appendix li ) . All <br /> conducted In accordance with GTI ' s SOI' 8 <br /> the well heads were surveyed on June 19, 1987 to determine a <br /> relative local groundwater gradient. <br /> GROUNDWATER SAMPLING <br /> sampled on June <br /> The five monitoring wells were developed and <br /> 22 , 1987 , They were developed by hand bailing prior to <br /> sampling. All of the samples were obtained with an EPA approved <br /> teflon sampler . <br /> The samples were collected , preserved and <br /> transported under Chain-Of -Ciistody in accordance with GTI ' s <br /> gOP' s 9 , 10 and 11 (see Appendix II) . The samples were analyzed <br /> for TV11 and BTEX by Modified EPA Method 602 . <br /> M. SITE CONDITI0NS <br /> BYDROGEOL,OGY <br /> located on the western edge of the Tracy <br /> The site is <br /> Groundwater Basin, a politically designated portion of the San <br /> Basin Is <br /> water <br /> " <br /> The San JoJoaquin Groundwater Basin. its <br /> Joaquin <br /> itributaries, Recharge <br /> drained by the San Joaquin River and ts <br /> foothi <br /> occurs to the west of the site in th <br /> ration ofesurface lls of the Diablo <br /> waters. <br /> Mo_u_n-t.ai_n__Range and from infiltration <br />