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X. <br /> OFFICE 0)=T` _E v17'f.�� :1i�1:1t�a <br /> CI-Y 23 <br /> 109]Q 7 _ C <br /> ry.X i2091 E7-71,4Ej <br /> December 16, 1999 <br /> Ms. Donna Heran, RENS, Director <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH SERVICES <br /> 304 E. Weber Ave, 3'd Floor <br /> Stockton, CA 95202 <br /> _ .-tt ._.. f•-rte +...�:::�.r.:_ '-gym Ik <br /> RE: UNDERGROUND STORAGE TANK, <br /> 325 SOUTH EL DORADO STREET, STOCKTON, CPI' <br /> GATEWAY REDEVELOPMENT PROJECT <br /> Dear Ms. Heran:, <br /> We received your letter dated December 7, 1999 regarding the soil beneath a'found <br /> underground storage tank located along EI Dorado Street, just.south.of.Lafayette Street. <br /> ,.We respectfully request that you consider the following information,in determining the. <br /> actions necessary to close.this site and thereby,allowing the Redevelopment Agency to <br /> proceed with its project. <br /> ,:This city,block is'part of the Downtown Gateway Redevelopment'Project; which A <br /> ;included the demolition of two-thirds of this city block. During theA6=lition, an <br /> underground storage tank was located under the sidewalk along El Dorado. A permit <br /> was applied for, the tank was removed, and the"soil was tested per your d'epartment's <br /> protocols. Tests of the it and the stockpile, performed by Twining Laboratories, <br /> p P ,; . <br /> showed nondetectable levels for benzene, toluene, ethyl-benzene, and.,xylene (BTEX); <br /> methyl tertiary butyl-ether (MTBE); and total petroleum hydrocarbons, asoline and <br /> diesel (TPH-G and TPH-D), While preparing to backfill, a second tank.was located. <br /> `immediately to the north of the-first tank. This second tank was-situated-under'the <br /> sidewalk in an east-west alignment, and immediately adjacent to EI Dorado Street. <br /> i Again, permits were applied for, the tank was removed, and soil tests were performed <br /> per your department protocols. The location of these tanks corresponds with an old <br /> auto repair shop that hasn't been in business for over twenty years. <br /> Twining 'Laboratories performed the soil tests of the second tank as well. Their results <br /> showed, again, nondetectable levels for BTEX, and MTBE. TPH-G and TPH-D were <br /> detected at the eastern end of the tank location at 78 milligrams per kilogram"(mg/kg) <br /> and 62 mg/kg, respectively. A composite of the stockpile removed from the hole'tested <br /> for TPH-D at only 21 mg/kg. Additionally, all tests for metals, for both sites and the <br />` stockpiles, were,within expected ranges for dirt. Your department currently has a copy <br /> of the Twining Laboratories test results- <br /> i <br /> "STOCKT0N...CAL1Fr3PjN1A'S SUNRISE SEAPORT" <br />