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i <br /> k'4 KLEINFELDER <br /> 1 EXECUTIVE SUMMARY <br /> The following report presents the results of Kleinfelder's.ground water investigation.at the <br /> Tracy Community Memorial Hospital in Tracy, California. At the request of the San <br /> Joaquin Local Health District, three monitoring wells were installed and sampled to assess <br /> the presence of petroleum hydrocarbons in the ground water. <br /> During well installation, four borings were drilled and soil samples were collected from <br /> each: MW-1, B-8, MW-2, and MW-3. The boring, B-8, was initially drilled to install <br /> 2 monitoring well MW-2. However, clue to the proximity of an existing underground storage <br /> • tank (currently being permitted for closure in-place due to its proximity to existing <br /> structures) and observed soil staining and odor during drilling, this boring was closed by <br /> grouting and MW-2 was relocated.. Based on field observations, two samples from.B-8 <br /> were submitted for chemical analyses. The results of these analyses will be submitted at a <br /> later date, as an addendum to this report. -- <br /> The remaining three borings completed as monitoring well MW--1, MW-2, MW-3. Water <br /> le eas eats taken March 23, 1989, indicate a local ground water flow direction to <br /> ' the nort west All analyzed petroleum constituents in the water sam les from MW-1, MW- <br /> -3 were below laboratory reporting limits except f r 0.9 ug/l oluene in the <br /> ------------- <br /> duplicate sample from the upgradient well, MW-3. Analytical indicate that the <br /> ground water has not been significantly impacted by petroleum hydrocarbons. <br /> Kleinfelder reconunends a copy of this report be submitted to the San Joaquin Local <br /> Health District (SJLHD) for review and consideration. <br /> 1.75-89-543 1 <br />