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i <br /> i <br /> I <br /> I <br /> CHRONOLGY I <br /> 1130 S. PILGRIM STREET <br /> LOP SITE CODE: 0001574 <br /> APN: 15135001 <br /> CVRWQCB CASE: 391156 <br /> 05/7/2004 On this date a 4,000 gallon heating oil UST was removed from a former <br /> school site now owned by the -Islamic Center of Stockton. Soil samples <br /> were collected and analyzed from beneath the piping and at the UST <br /> invert. One sample (TIC-1) on the north end of the UST was positive for <br /> Total Petroleum Hydrocarbons (TPH) as oil (14,000 mg/kg). The soil <br /> stockpile was tested and later disposed of at Forward Landfill. The <br /> excavation was backfilled with clean soil. <br /> 05/21/2004 The San Joaquin County Environmental Health Department (EHD) filed a <br /> Notification of Hazardous Waste Discharge and an unauthorized release <br /> report for the contamination that was discovered during UST removal on <br /> thi s.date. <br /> 06/04/2004 The EHD placed the site into the Local Oversight Program for further soil <br /> and ground water assessment on this date. <br /> 02/09/2005 The date of the Preliminary Site Assessment Work Plan submitted by <br /> Advanced GeoEnvironmental Inc. (AGE). <br /> 04/08/2005 On this date the EHD approved the work plan for one boring to ground <br /> water in the area of the known contamination. Soil and ground water <br /> would be sampled and analyzed for: TPH as gasoline, diesel, and oil, <br /> BTEX, and fuel additives. <br /> 06/30/2008 An EHD inspection was performed on this date during soil and ground <br /> water sampling. Two borings were completed: one shallow soil boring to <br /> 15 feet below ground surface (bgs) where it met refusal; one boring to <br /> approximately 50 feet b s where a water sample was collected. The two <br /> borings were less than 6 feet apart. <br /> 12/05/2008 The date of the AGE Preliminary Site Assessment Report submitted to <br /> EHD. The 12 soil samples and 1 ground water sample were all below <br /> laboratory detection limits for: TPH as gasoline, diesel and oil, BTEX, and <br /> fuel additives. <br /> 12/04/2008 On this date the EHD staff discussed site closure consideration with the <br /> Central Valley Regional Water Quality Control Board staff. <br />