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1 <br /> I k <br /> L <br /> 71 <br /> 1' <br /> WATERWORK CORP. <br /> A RESMA Company — - � <br /> Environmental Solutions <br /> Through'Applied Science, <br /> Engineering&Construction <br /> 1710 Main Street <br /> Escalon, CA 95320 NOV 7 <br /> 'hone: (209) 838-3.507 <br /> Fax: (209) 838-3509 E VfRON!"A Iy�Ai_ Fit iLTki <br /> i'- S November 25, 1991 <br /> Mr. Steve Schneider <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> F.O. Box 2009 <br /> Stockton, CA 95201 $ ` <br /> f RE: 1991 Fourth Quarter Report and Closure Request, Stephens Marine, 4950 West <br /> .Brookside Road, Stockton, CA (Site Code: 1028) <br /> Dear Mr. Schneider: <br /> . i <br /> This letter report summarizes RESNA Industries' <br /> (RESNA)activities at Stephens Marine during <br /> the fourth quarter of 1991. Figure 1 shows the location of the site. Activities during the <br /> quarter included sampling groundwater for dissolved hydrocarbons and monitoring groundwater <br /> z; levels. <br /> Groundwater monitoring data collected in October, 1991 reveals a constantly fluctuating water <br /> F{ elevation and gradient due to changes in river tides. Tables I &2 summarize this quarter's and <br />_: previous rounds of groundwater monitoring data, gradients, and tidal changes. The groundwater <br /> gradient rr+-ap (Figure 2) shows an average gradient of approximately 0.007 foot <br /> per foot or 37 <br /> m` feet per anile. Groundwater flow on October 22, 1991 was in a south-southwesterly direction. <br /> Groundwater samples were collected from the three monitoring wells on October 22, 1991, after <br /> stabilization of pH, electrical conductivity (EC), and temperature. The wells were purged using <br /> dedicated submersible pumps. Well purge logs are included in Attachment 1. <br /> The samples were submitted to Applied Analytical of Fremont, CA HS certification <br /> for analyses of total � #I211) , <br /> y petroleum hydrocarbons as gasoline and diesel (TPHG & TPHD) utilizing <br /> EPA methods 5030/8015, and for the gasoline constituents benzene, toluene, ethylbenzene, and <br /> xylenes (BTEX) utilizing EPA method 8020. Laboratory results reported no analytes at or <br /> above method detection limits in wells MWI, MW2 and MW3. Table <br /> 3 summarizes the <br /> Y: SML R1025.WP <br /> i <br /> �1 <br />