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<br />ExxonMobil Global Services <br />Colony Shale Oil Project <br />ESR Reclamation Studies <br />Weighing Lysimeter Performance 1990-2003 <br />Project No. 353 <br />Page 2 <br />important information related to the survivability of the plant cover and the quantity and quality of <br />runoff and percolate, those aspects of the design parameters are the subject of the monitoring of other <br />instrumented plots at the site (sloping plots, flat plots). Finally, the condition and progress of the <br />vegetative cover is monitored and reported on independently by others (Dr. Warren Keammerer and <br />Associates). <br />3.0 PROJECT' BACKGROUND <br />The following background discussion is provided to put this study into perspective, and may <br /> <br />be of use in future reviews of other aspects of the ESR Reclamation Studies Plots, hereafter referred to <br />as the "ESR Plots". <br />3.1 Historical Overview of Spent Shale Revegetation Studies for Commercial Projects <br />3.1.1 Muting Pemtits required <br />Al] shale oi] projects that were to rely on mining of the oil shale rock and/or disposal <br /> <br />of the spent shale after the oil had been extracted required a permit from the state agency that <br />regulates mining and mining related disturbance. In Colorado, that agency is currently the <br />Colorado DRMS (Division of Reclamation, Mining and Safety), formerly Mined Land <br />Reclamation Division (NERD) in the 1980s, with the actual mining pemrits issued by the <br />Colorado Mined Land Reclamation Boatel (MI,RB). The requirement to obtain a mining <br />permit applied equally to underground room-and-pillar mines with spent shale disposal in <br />large surface piles (eg, original Colony Project, Unocal's Parachute Creek Project) and to <br />large open pit mines with in-pit disposal of the spent shale (Chevron's Clear Creek Project in <br />the early I980s}. A mining permit was also requited for various in-situ oil extraction projects <br />(e.g., Rio Blanco "Ca" project, joint development by Amoco and Gulf Oil) even though those <br />LACHEL FELICE & Associates <br />