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Amerco Real Estate Co / U-Haut #709-50. page 2 <br /> 2701 N. Wilson Way, Stockton, CA. <br /> After two consecutive QMRs (1St and 2nd QMR —1999) have been submitted to PHS-EHD that <br /> indicate that this "drowned-screen" interval is present, U-Haul is directed to submit a work <br /> plan to install the additional monitoring wells next to every monitoring well with a <br /> drowned-screen. <br /> Prior to evaluating leaking UST sites for the need for soil and/or groundwater remediation or <br /> accepting a request for"No Further Action", the site must have the soil and groundwater plumes <br /> delineated in both the vertical and lateral extents. The soil contamination at this site is not <br /> vertically defined. In addition to the current depth to groundwater investigation required for this <br /> site, an investigation to define the vertical extent of the soil contamination is also required. <br /> During Fall 1991, San Joaquin County experienced a `drought" condition. Sites that had USTs <br /> operating at this time <br /> required <br /> Fl odtControl hasthe <br /> recorded the depthrelease <br /> theimpacted <br /> fi first grroundwateothr inls <br /> depth. San JoaquinCounty <br /> 1991 at this site at 90 feet below ground surface (` bgs). <br /> A complete cross-section of the soil lithology and petroleum concentration from the surface to <br /> 90' bgs is required for this site. In order to provide data for this cross-section and a mass <br /> balance calculation for a Closure <br /> samples Report, <br /> alPdepths Dherge currently nbs <br /> one cs avaeabgtion <br /> e . <br /> that includes the <br /> The work plan that includes all of the requirements noted above is to be submitted to <br /> PHS-EHD before August 20, 1999. <br /> Please address you submittals to Michael Infurna and you may call him at (209) 468-3454 <br /> should you have any questions. PHS-EHD would like to be present at the next sampling event. <br /> Please call and make an appointment with Mr. Infurna with at least forty-eight (48) working <br /> hours notice. <br /> Donna Heran, RENS, Director <br /> Environ ental Health Division <br /> Gia U <br /> Michael J. Infurna Jr., Senior REHS Marga et Lagorio, REHS <br /> LOP / Site Mitigation Unit IV Supervisor <br /> MI/ <br /> enclosure (to addressee and consultant) <br /> c: CVRWQCB — Mark List, Sacramento. <br /> c: SWRCB CUF — Sandy Gill, Sacramento. <br /> c: Consultant — Keith Thompson, 2 Santa Maria, Foothill Ranch, CA., 92610. <br />