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III. MSC's Industrial Operations and Activities <br /> MSC has been involved in marine cargo handling operations since the <br /> beginning of its leased operations at the Port of Stockton in 1981. These <br /> operations include handling a variety of cargos by loading them onto ocean going <br /> ships via an integrated conveyor system with secondary containment and <br /> pollution prevention (P2) features. Unloading, typically involves tipping rail cars in <br /> a specialized rail car tipper which has been designed with secondary <br /> containment for the cargo inside a storage pit underneath the rail car tipper, see <br /> photograph 1 below: <br /> . Photograph 1: View of Coal Car Tipper <br /> Historical land use on site dates back to the 1800s, when the Port first <br /> became a water transportation center during the gold rush. In the 1930s the Port <br /> constructed wharves and the railroad, which provided land to vessel transfer <br /> connection. Extensive review of aerial photographs by Dames and Moore <br /> showed that the subject site was used for agricultural purposes in 1934/35. <br /> Further review of Aerial photograph from 1963, by Dames and Moore showed <br /> bulk materials distribution facility located adjacent to the subject site. In addition, <br /> a small stockpile of bulk material was also viewed situated on the north end of <br /> the site. Dames and Moore's review of aerial photographs for 1968, 1970, 1976 <br /> show the site to be essentially the same with the exception of a discernable <br /> increase in the size of the bulk material stockpile to the north of the site and the <br /> expansion of the rail line. The 1980 and 1987 aerial photographs both show the <br /> site to be essentially unchanged with the exception of an extension of the bulk <br /> material distribution facility located to the north of the site. The 1990 aerial <br /> photograph showed the site surrounded by a rail loop. In addition, two large <br /> stockpile of what appeared to be coal was observed on site. <br /> This SAP shall, however, only concentrate on any potential contributions <br /> from MSC industrial operations, which might have potentially impacted the <br /> ground water quality on site. These operations were: <br /> • Petroleum Coke Stockpile and handling <br /> 4 <br />