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f ' ' <br /> R CHRONOLOGY :�• <br /> CHARLIE'S DAY.&NIGHT LOCK&KEY , <br /> �. <br /> 706 N EL DORADO <br /> STOCKTON CA 95203 <br /> 06/10/97 Removed two previously unregistered underground storage tanks (UST) ID 506687 <br /> (Tank 1) and 506688 (Tank 2) from the site and transported to Schnitzer Steel ' <br /> Products at 12000 Folsom Blvd. in Rancho Cordova for disposal. Soil samples <br /> were collected. Approximately 100 yards of excavated soil was moved to the <br /> adjacent empty lot east of the site. Underground piping was not removed. Noted <br /> presence of strong gasoline odor. <br /> 06/13/97 Completed Prop-65. (� <br /> 07/17/97 Results of soil samples from the west end of tank 1 at 15 feet below surface grade <br /> s were: <br /> Toluene Ethyl Benzene Xylenes MTBE TPH- as <br /> TK-1 west 350 160 750 3.6 11,000 <br /> Stockpile ND ND I ND IND IND <br /> All results in mg/kg. <br /> MTBE by EPA Method 8020. Not confirmed by 8260. M <br /> Concentration of lead was 330 mg/kg (STLC was 6.9 mg/l) in the soil sample from <br /> dispenser#1 at 1.5 feet bsg. Concentrations of lead in the soil samples at 15 feet <br /> bsg was significantly reduced (by two orders of magnitude or ND). <br /> 07/18/97 Issued Unauthorized Release Report (UAR). <br /> 12/31/97 Issued"Notice of Responsibility"and entered site into Local Oversight Program. <br /> 08/24/98 UST piping removed and soil samples beneath'it collected. <br /> 10/20/98 Advanced 3 Geoprobe borings B-1,B-2,B-3 to 64, 30, and 45 feet bsg,respectively. <br /> Collected soil and groundwater samples for Iaboratory analyses. Groundwater was <br /> encountered at 34 feet bsg before rising to 23.4 feet bsg. <br /> TPH-gas Benzene Toluene Ethyl- Xylenes MTBE <br /> benzene <br /> B-3 20' 3,700 <0.5 3.0 41 120 <0.17. <br /> B-3 40' <1.0 <0.005 <0.005 <0.005 <0.005 <0.005 + <br /> B-3 GW 12,000 <2 <2 200 720 <2 <br /> Soil samples in mg/kg <br /> Groundwater(GW)inµg/l <br /> �k <br /> Stockpile stored on the empty adjacent lot could not be located. Consultant <br /> suggested the stockpile was redistributed on the lot. y <br /> I <br /> b <br />