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a, .� _ �.- m€ e �j& � ,.3,�-+rte_ v ..�n �dT" ,xm+�i� � `b'r'- �' = it�•�;a���J '�'r�' lamas.-s�.��'a _it'� i,, .mss?+ <br /> j <br /> AGS Joh No. 38012-2 <br /> July 28, 1988Stuckton, California <br /> Former UNOCAL Service station, <br /> Monitoring well MW-1 is located adjacent to the north side of the <br /> `1 former underground tank cavity to evaluate the degree of <br /> contamination near the former tanks. <br /> Monitoring well MW-2 was <br /> constructed at the east margin of the site, south of the former <br /> F`1 <br /> direction inferred <br /> dispenser islands. This well was located in a <br /> gasoline storage <br /> to be downgradient from the present underground round-water flow <br /> tanks based on regional topography and inferred g <br /> fywell Mw--3 was installed <br /> west of the tank <br /> patterns. Monitoring <br /> cavity to allow evaluation of contaminant levels towards <br /> hte e <br /> western margin of the site. As required by the SJL�HD, t <br /> t ' ✓ <br /> locations of monitoring wells 14W-2 and MW-3 are more than 50 feet <br /> any property line. <br /> from any sewer line and 10 feet from <br /> SOIL BORING AND SAMPLING <br /> Soil borings B-1 through B-3 were drilled using <br /> a Mobile B-53 <br /> ipped with 8-inch-diameter, continuous-flight, <br /> drill rig equ <br /> ation, inc. , of <br /> hollow-stem augers and operated by <br /> Datum Explor <br /> Pittsburg, California. The auger flights were steam-cleaned <br /> prior to use in each boring to minimize the Possibility of <br /> --- ---------- <br /> --- - -- downhole -or cross boring contamination. The drilling was <br /> ist, and-the-earth-- <br /> performed under the guidance of a field geolog' <br /> materials in the boring were logged as drilled. <br /> 9 <br /> Appl ed 000Sf S.tel"s <br />