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JUN, 15. 1998 10: 300 5108665681 N0, 0162 P. 2 <br /> • CALIFORNIA REGIO WATER QUALITY CONTROL BOARD • Cal/EPA <br /> CENTRAL VALLEYR ON <br /> 3443 Routier Road, Quite A <br /> Sacramento,CA 95827-3003 <br /> Phone(916)255-300;) <br /> FAX(916)255-3015 p wiVon oa�e.nar <br /> 12 May 1998 <br /> Ms. Linda Gonsalves <br /> Pacific Gas & Electric Company <br /> 375 North Wiget Lane, Sui Le 200 <br /> Walnut Creek, CA 94598 <br /> WORK PLAN FOR BIORi;'MEDL4TION PROJECT, PACIFIC GAS&ELECTRIC COMPANY, <br /> McMULLIN GAS DEHYDRATOR STATION, SAN JOAQUIN COUNTY <br /> I have reviewed the 28 April 1998 Workplan.for Performing an In-Situ Bioremediation Demonstration <br /> Project, PG&E Former Mekfullin Gas Dehydrator Station, San Joaquin County submitted by Pacific <br /> Gas& Electric's Technical and Ecological Services Division. The work plan is for a demonstration <br /> project to evaluate the effectiveness of using an oxygen-releasing compound to elevate oxygen <br /> concentrations in the vadoz,,zone and groundwater to enhance the biodegradation rate of petroleum <br /> hydrocarbons. The work plan is approved with the following conditions: <br /> 1. If lawn fertilizer is used to increase available nutrients, then the background concentrations of <br /> nitrate and phosphorous shall be measured in the groundwater and reported to the Board prior to <br /> application. Records shall be kept and submitted to the Board on the type and application rate of <br /> fertilizer. Sampling ant.analysis for nitrate and phosphorous shall be included in the proposed <br /> monthly monitoring program and results submitted to the Board in the summary report. Application <br /> rates of fertilizer shall n Dt degrade groundwater quality. Total nitrate concentrations (nitrate+ <br /> nitrite) in the groundwater shall not exceed site background levels. . <br /> 2. By 30 December 1998, a.summary report of the experiment findings shall be submitted to the Board. <br /> If you have any questions, you may call me at(916) 255-3077. <br /> 7 <br /> KIT CUSTIS <br /> Associate Engineering Geologist <br /> KHC:khc/lsb <br /> cc: Mr, Darrell Klingman,.Pacific Gas &Electric Company, San Ramon <br /> Reevc1odPa er <br /> P Our mia:v/un is to prexerm and enhance the qualiry oJCafl(ontia:r waterresources,and <br /> ensure their proper arlocalion and efficient uaefor the benefit ofpreeent and n e generatlona. <br />