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k <br /> VUNITEO PACIFIe <br /> ENVIRONMENTAL <br /> MANAGEMENT&CONSULTING SERVICES <br /> 2699 E. 28TH ST., SUITE#405 <br /> SIGNAL HILL, CA 90806 <br /> SGZ (3W 981-3346 <br /> (34-0)427-5806 Fax <br /> October 13, 1997 PA6 <br /> Ms. Margaret Lagorio <br /> Remediation Unit#4 <br /> San Joaquin County, Public Health Services <br /> PO Box 388 <br /> Stockton, CA 95201-0388 <br /> AND VIA FAX (209)468-3433 <br /> RE: Certified Grocers of Stockton - UST removal project. <br /> Dear Ms. Lagorio: <br /> Thank you for the return call Friday morning regarding the above site. We appreciate your <br /> efforts in working with us to complete this project. <br /> Per our conversation, we would like to gather all the current data current soil sampling and <br /> provide you with this information in order to discuss the project and choose the best <br /> method to move forward. We want to do whatever we can to comply with your <br /> requirements to protect our ground water while at the same time evaluate the necessity to <br /> remediate areas which may not pose a threat to the environment. <br /> The following summarizes the site information to date: <br /> 1 . THE UST REMOVAL SAMPLES. <br /> On September 25, one double wall 20,000 gallon UST was removed along with the <br /> 5-gallon overspill containment. Upon removal of the tank, Advanced GeoEnvironmental <br /> obtained three soil samples from approximately 14 feet below ground surface. The <br /> McCampbell Analytical Laboratory report shows each of these samples (T1,T2, T3) to be <br /> Non-Detect for each analysis performed (TPHd and BTEX). <br /> 2. TANK REMOVAL STOCKPILED SOIL. <br /> During the removal of the tank, approximately 130 tons of soil was stockpiled adjacent to <br /> the excavation and separated into two separate piles. Four stockpile samples were <br /> obtained from each stockpile (SP 1-8). None of these samples showed any Benzene and <br /> only one sample showed actionable levels of TPHd. We approximate this sample to <br /> represent 10 - 15 tons of soil. <br /> Due to the apparent low levels of contamination, this soil was backfilled and compacted <br /> into the former tank excavation. <br />