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Various raw materinls were used: shale oil, crude otl, reduced crude, pitch, green coke, natural gas, and wafer. AI <br />the intake water was from the Colorado River. <br />The jollowing production process units existed at the Landmark Petroleum refinery: crude unit, vacuum dutillntio <br />unit, delayed taker, calcines, hydradesuljurizer-reformer, vapor recovery unit, hydrogen plants (two steam-urethan <br />rejornting units which produced hydrogen), UOP extractive Meroz plant, Gilsonite melt plant (which was nevc <br />used), hydrocracker complex, tankage, PSA (pressure .sxing absorption) unit, sulfur plant, amine unit, and sou <br />water stripper. !n 1992, the crude oil processing was not regularly used, but the crude unit production processE <br />were kept in reserve jar possible use and jar certain specific batch production operations. As later indicated, th; <br />oi! reftnery used hydrocracking towers and nantral gas to add hydrogen to crackt'ng wastes from other refnerie. <br />Thus, the facility upgrades tower quality or more di~culr to reftne feedstocks from other refineries into low sulfa, <br />high quality petroleum byproducts. The facility also refined high quality coke for the steel manufacturing marker. <br />2. PYactewntvr Cnurrac -The wastewater source of concern at this facility is the gravel pit washwater pond. The pan <br />has been impacted by groundwater from the former oil refinery. The water in the pond wit! generally be discharge <br />directly to the Colorado River or by infiltration that is directly connected to the river. The permittee had th <br />washwater pond analyzed for various constituents. The results of the analysis are found in Part VI. A.2. of th <br />rationale. The reason for the request was to find ijthe permit could be converted to a general permit for sand an <br />gravel operations. The water analysis indicated that the permit could not be convened to a general permit becavs <br />of the water quality. The Division determined that limitations would be developed in the event of discharge fro; <br />this facility. <br />3. C'hvmirnlc i/cvd - It was indicated in the permit application that no chemicals are being used at the time ojth <br />permit draft. <br />B. Wastewater Treatment Description <br />The washwater pond serves as a sedimentation basin for the removal of suspended solids during rite gravel cleaning prates <br />No additional treatment rs used for the removal ofother pollutanu found in the washwater pond. <br />IV. PERFORMANCE HISTORY <br />A. t~fonitoring Da[a <br />1. Dicrhargp Mnni'eringRv,~rtc - Bemuse this is a new facility, no discharge monitoring data is available. <br />However, a one-time analysis was performed on the parameters listed on the jollowing page in Table IV-1. <br /> <br />