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May 1, 1991 <br /> g <br /> 3 <br /> Mr• Steve Schneider <br /> ` San 3aaqui:n County Public Health Services f <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> i <br /> s` Re: Site Code: 1028. 1991 Second Quarter Report <br /> Stephens Marine, 4950 West Brookside Road <br /> Stockton, CA <br /> Dear Mr. Schneider: <br /> This letter report summarizes the activities at Stephens Marine <br /> (Figure 1) during the second quarter of 1991. Activities <br /> the quarter have in es Burin <br /> eluded sampling for dissolved hydrocarbons and <br /> monitoring of groundwater. <br /> 7 <br /> Groundwater monitoring data collected in April reveals a constantly <br /> fluctuating water elevation and gradient due to changes in River <br /> stage (Tables 1 & 2). The groundwater gradient map (Figure 2) <br /> shows an average gradient <br /> to southeast. of 0.005 ft,/ft, , and varying from south <br /> Groundwater samples were collected from the three wells on April 2, <br /> 1991, for analyses of benzene, toluene, <br /> (BTEX), and total ethylbenzene, xylenes <br /> i petroleum hydrocarbons as gasoline and diesel <br /> (TPHG & TPHD), by EPA methods 8020/8015. Applied Analytical (DOHS <br /> #1211) performed the analyses of all samples. The laboratory <br /> results reported no constituents above Method Detection Limits in <br /> wells MW1, MW2, and MG#3. The laboratory reports and chain,-of- <br /> custody documentation are presented In Attachment 1. <br /> 8MLR0501,sup <br />