Laserfiche WebLink
ENGINEERING TECHNOLOGY DEPARTMENT <br /> RICHMOND, CALIFORNIA <br /> ALDEN PARK, TRACY, CALIFORNIA, DECEMBER 4 , 1987 <br /> PRELIMINARY MITIGATION PLAN - <br /> WRITTEN DISCUSSION OF <br /> NOVEMBER 12 PRESENTATION <br /> Author - D. L. Ely <br /> This summarizes Chevron' s preliminary mitigation plan for the <br /> Tracy Alden Park area . Included is an executive summary followed <br /> by a more detailed discussion of the recommended plans. Also <br /> discussed are plans for collecting data from field pilot tests. <br /> This will determine the feasibility of the technologies chosen so <br /> plans can be finalized for mitigation facilities. <br /> Executive Summary <br /> Pilot Tests <br /> The two technologies selected for removing oil at the site are: <br /> 1. Liquids pumping to remove liquid oil collecting on the ground <br /> water surface. A pumping test can determine how effective this <br /> is . Critical information needed includes : oil recovery rate, <br /> area influenced by a single pumping well, and produced water <br /> quality. Laboratory testing of groundwater recovered during the <br /> pumping test can be used to design groundwater treatment tech- <br /> nologies . <br /> 2 . Soil venting to stimulate biodegradation of oil trapped both <br /> in the soil and collecting on the water table. Critical informa- <br /> tion gathering during a pilot venting test includes : distance <br /> reached laterally into the soil, biodegradation removal rate, and <br /> hydrocarbon concentration in the vent gas. <br /> Mitigation System <br /> Construction and Operation <br /> The biggest advantage of the soil venting process and the ground- <br /> water pumping system is both can be constructed and operated with <br /> very little inconvenience to the citizens who live in the area. <br /> Encl . - Table I <br /> Figures 1-5 <br />