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f <br />Seasonal high depth to groundwater, as determined by San Joaquin County Flood Control maps for 1986, <br />is 30 feet below grade. Contaminated soil was observed beneath the 500 gallon boiler fuel tank but the <br />actual extent and depth of the contamination is not documented. Soil samples collected at 20 feet below <br />grade beneath the 1000 gallon bunker oil tank and 25 feet below grade beneath the 500 gallon boiler fuel <br />tank are within 5-10 feet of seasonal high groundwater and the detection limits used for those samples are <br />higher than the detection limits currently recommended. <br />With the provision that the information provided to this agency was accurate and representative of existing <br />conditions, it is our position that no further action is required at this time. <br />Please be advised that this letter does not relieve you of any liability under the California Health & Safety <br />Code or Water Code for past, present, or future operations at the site. Nor does it relieve you of the <br />responsibility to clean up existing, additional or previously unidentified conditions at the site which cause <br />or threaten to cause pollution or nuisance or otherwise pose a threat to water quality or public health. <br />Additionally, be advised that changes in the present or proposed use of the site may require further site <br />characterization and mitigation activity. It is the property owner's responsibility to notify this agency of any <br />changes in report content, future contamination findings, or site usage. <br />If you have any questions contact Margaret Lagorio at (209) 468-3449. <br />Donna Heran, REHS, Director <br />Environmental Health Division <br />GLV _ VV�G V`h��U�V <br />Margare�Lead Senior REHS Diane M. Hinson, REHS <br />Site Mitigation Unit Supervisor <br />ML <br />c: Trevor Santochi, RG, CEG <br />17875 Von Karman Suite 200 <br />Irvine, CA 92714 <br />c: Richard Liddell, Vice President of Facilities American Savings <br />17877 Von Karman 3rd Floor <br />Irvine, CA 92714 <br />