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JAN -25-1999 1-1'39 TAIT &AZWfCIA <br />1 (0 <br />San JoaquW Como of PuWk i4yorks <br />Workplan for Site Assessment <br />o <br />j9MUM7 15,1 <br />Water Company, which provides domestic water supplies to ' <br />northern Stockton, groundwater <br />Appears to be unconfined, although due to the fitie-graijocd nature of the shallow sediments. <br />ftm may also be perched zones. In the city Of Stockton. potable groundwater pumped from <br />municipal and domestic water wells is mixed with iuWrted water. However. these water <br />wells reportedly extend to a depth of 500 feet bgs. <br />Potentially fresh water -bearing sediments extend from the iurface, down to depths of at lent <br />3,000 feet b irs with nu=m WILTz wells exteTdin-.A-rm,-Y t-cjm-.,r'rq xf <br />0. 4 <br />wMi I l 1 <br />I I <br />V"Jil <br />iTq1 <br />TIM SITE is located in the Delta subregion along the northern margin of the San Joaquin <br />Valley grourxi water basin, within the northern portion of the San Joaquin Basin Hydrologic <br />Study Area. Areas to the north and West of the SITE, in the San Joaquin delta region, report <br />rising Wine water levels which have diminished shallow groundwater quality. However, sea <br />water intrusion has not yet extended to the vicinity of the SITE. <br />LU 111) plej 0 yj <br />* Assess the vertical and lateral exteut of Perroluem fuel hydrocarbon in the subsurfacl <br />0 Investigate the possibility of any impact to groundwater if encountered during assessment. <br />The vne of vyxTi�-vtqt <br />Task 1: Perndtftg, Agency Nothilcation & Tmffic Control <br />will be filed with the County of San Joaquin Public Health Agency prior to the initiation of <br />drilling. <br />The Proposed monitoriiag well locations ue presented in Figure 1. The RWQCB and SJCPHC <br />will also be notified a minim= of three (3) days prior to the start of fieldwork. Underground <br />Service Alert will be notified a minimum of 48 hours prior to initiating fieldwork for the <br />temarcation of underground utilities. <br />R1 <br />