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Mr. Robert Garcia • 2 • 19 February 2003 <br /> boundary of the capture zone, and the gradient at RW-2 may be controlled by pumping from RW-4A. <br /> Prior to shutting down RW-4A, we need to see evidence that TPHd levels in RW-2 are decreasing, and <br /> that the capture zone from EW-2 will prevent petroleum hydrocarbons from leaving the site. <br /> We have modified the MRP to eliminate BTEX from the required analyses, include the newly-installed <br /> EW-2, and reflect changes to the Water Code. Final MRP No. R5-2003-0808 is enclosed and should be <br /> implemented in the first quarter 2003, if sampling has not already taken place. By 19 March 2003, <br /> please provide a work plan for the proposed pilot study. If you have any questions, you may contact <br /> Gerald Djuth at (916)255-3077 or at djuthg@rb5s.swrcb.ca.gov. <br /> WENDY OHEN, P.E. <br /> Chief, Private Sites Cleanup Unit <br /> cc: Ms. Lori Duncan, San Joaquin County Environmental Health Services, Stockton <br /> Mr. Brendan Shine, HSI GeoTrans,Westminster, Colorado <br />