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' EFC 51462 01 UniFirst Stockton September 24,2004 The Tank Conditions are listed below Tank ' Tank Capacity 2,500 gallons Product Heating oil Construction Single-walled riveted steel ' Dimensions Diameter—4 , Length— 16' Condition Compromised SJCEH # 39-0515716 ' Pipeline Single walled steel — 5 foot length (not connected to anything at end opposite tank) Deputy Fire Marshall Kent Miller (SFD), David Bernier (EEC), Larry Costa (EEC), Peter Bernadicou (UniFirst), Mike Infurma(SJCEHD), and Dennis Catanyag (SJCEHD) were onsite to witness tank removal operations Following removal of the tank from the excavation, EEC inspected the physical condition of the tank Inspection of the tank revealed several holes and pitting Photographs of the tank removal and general work area are included in Appendix F 6 4 Soil and Tank Excavation Inspection 1 Fill material and native soil observed in the UST excavation consisted predominately of fine grained sand, silt, and clay Minor hydrocarbon staining was observed within the excavation The stained areas were completely excavated and stockpiled onsite No groundwater was encountered during the tank removal activities 6 5 Soil Sampling Two soil samples were collected from beneath the tank Samples T-East-8 and T-West-8 were collected at a depth of eight feet bgs (2 feet below the bottom of the tank) from beneath the former location of the UST Additionally, one soil sample (L-1-3') was collected at a depth of three feet bgs beneath the pipeline and two stockpile samples were collected from excavated ' backfill material (SP-East-1 and SP-West-1) Stockpile samples were collected to classify the soil for disposal Sampling locations and procedures were performed under the direction of Dennis Catanyag (SJCEHD) Soil samples from below the tanks were collected using a backhoe, and then a relatively undisturbed portion of the soil was collected in stainless steel sample sleeves with the use of a hand sampler Samples from the stockpile were collected by digging into the stockpile approximately three feet, then collecting a freshly exposed sample Soil samples were collected in stainless steel sample sleeves, immediately sealed with a Teflon TM lined cap, labeled, ' entered on the Chain of Custody, and then submitted for analyses to Cal Tech Laboratories of Paramount, California Soil sample locations from the tank and pipeline are shown in Figure 5 6 6 Laboratory Analysis Soil samples were submitted for laboratory analyses for TAH full range scan by EPA method ' 8015 and VOCs by EPA method 8260 Laboratory results are tabulated on Table 4 Copies of the laboratory reports are included in Appendix B Results of confirmation sampling following the UST removal indicate • No TPH or VOC constituents were detected in soil samples collected from beneath the ' eastern or western sides of the UST, 10