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.� CALIFORNIA REGIONAMATER QUALITY CONTROL BOARD CaVEPA <br /> CENTRAL VALLEY RE t. <br /> 3443 Routier Road, Suite A <br /> 4•"p w.,m°""F Sacramento, CA 95827-3003 <br /> Phone(916)255-3000 <br /> FAX(916) 255-3015 Pete Wilson,Gov or <br /> 12 May 1998 <br /> Ms. Linda Gonsalves <br /> Pacific Gas & Electric Company <br /> 375 North Wiget Lane, Suite 200 <br /> Walnut Creek, CA 94598 <br /> WORK PLAN FOR BIOREMEDIATION 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 McMullin 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 vadoze 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 and 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 not 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 /> r � <br /> KIT CUSTIS <br /> Associate Engineering Geologist <br /> KHC:khe/lsb <br /> cc: Mr. Darrell Klingman, Pacific Gas & Electric Company. San Ramon <br /> Renrled Paper Our mission is to preserve and enhance the quality ofCalifornia:v water resources,and <br /> ensure their proper allocation and efficient use for the benefit of present and future generations. <br />