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CENTRAL VALLE`° REGIONAL WATER QUALF"f CONTROL BOARD <br /> INSPECTION REPORT <br /> DISCHARGER: Mobil Oil Corporation <br /> LOCATION & COUNTY: Rough and Ready Island, Stockton, San Joaquin Cty <br /> CONTACT(S) : Jane Keith (818) 953-2519, Stephen Pao (415) 237-97.26 <br /> INSPECTION DATE: 21 May 1987 <br /> INSPECTED BY: Robert Niblack <br /> ACCOMPANIED BY: Stephen Pao, Mobil Field Engineer, Graham Sinclair, <br /> Mobil Terminal Manager, Mardo Kapraelian, <br /> engineering consultant to Mobil <br /> OBSERVATIONS AND COMMENTS <br /> The purpose of this site inspection was to determine if any <br /> activities were evident which impacted water quality at this <br /> location. On a drive-by visit the week before Ton Vorster and I had <br /> observed an excavation at the corner of the site in which a black <br /> oily liquid was ponded. I wanted to discuss this with a Mobil <br /> representative at the site. <br /> At the site I net Stephen Pao, Mobil field engineer, Mardo <br /> Kapr_ealian, consultant to Mobil for underground tank removal , and <br /> Graham T. Sinclair, Mobil Terminal Manager for Northern California. <br /> We walked around the entire bermed area containing the above ground <br /> storage tanks. This area appeared clean and well-maintained. No <br /> surface drainages appeared to lead into or out of the bermed area. <br /> The rest of the site is graded so that water runs off to the south <br /> and east, except for the loading rack. <br /> The loading rack pavement is drained by two circular storm drains. <br /> I was told these empty to a 10, 000 gallon underground fiberglass <br /> tank. Product is separated from water in the tank and pumped to a <br /> large above ground tank. The remaining water is shipped off-site <br /> under manifest, according to the Mobil representatives. I observed <br /> a pipe leading from the vicinity of the underground fiberglass tank <br /> to the surface in the bermed area. I was told this outlet is no <br /> longer used, but it once emptied the separated water portion of the <br /> tank contents onto the ground surface. The hard-packed ground <br /> surface was gullied by past flows from the pipe. In an inspection <br /> memo from the Department of Health Services dated 19 March 1934 , Sam <br /> Zarek of DOHS states that G. L. belly, Terminal Manager for Mobil , <br /> demonstrated how water accumulated in the tank was discharged into <br /> the tank farm. That memo cited Mobil for a violation of Faderal <br /> regulations for failing to make a hazardous waste determination of <br /> this water. <br />