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Underground Storage Tank Removal Report and Work Plan For Monitoring Well Installation 3 . Southland Store#17334,4501 North Pershing Avenue,Stockton,California October 27, 1998 petroleum hydrocarbons-as-gasoline (TPH-G) by EPA Methods 8020/8015 modified, and the oxygenates tert butanol (TBA), MTBE, di-Isopropyl ether (DIPE), ethyl-tert-butyl ether(ETBE), and tert- amyl-methyl ether(TAME) by EPA Method 8260 I Following sample collection, the soil was transported for placement along the west bank of a levy approximately 0 25 miles south of Eight Mile Road and 2 5 miles west of 1-5 as shown on a sketch included in Appendix A The transportation of the soil was approved by Mr Harlin Knoll On August 25 and 26, 1998, an additional 400 cubic yards generated from the continued excavation of the new tank pit was transported to the same location along the levy south of Eight Mile Road A total of eighteen soil samples were collected from the approximately 600 cubic yards of soil stockpiled (SP- 2) along the levy at the request of Mr Harlin Knoll The samples were collected following the same sampling protocol mentioned above The samples were combined in the lab into nine samples and analyzed for BTEX, MTBE, and TPH-G following EPA Method 8020/8015 modified On August 26, 1998, an additional 150 cubic yards of soil generated from the new tank pit excavation was stockpiled at the site (stockpile SP-3,Appendix A) A total of six soil samples were collected from the stockpile and combined in the lab into three soil samples The samples were analyzed for BTEX, MTBE, and TPH-G following EPA method 8020/8015 modified The stockpiled soil was later transported off site for storage at Robinson Trucking and later reused to backfill the former UST pit 4 2 Soil Stockpile Sampling Results Analytical results for the soil samples collected from the stockpiled soil (SP-1, SP-2, SP-3) generated from the excavation of the new tank pit are summarized In Table 1 Laboratory analytical reports along the chain-of-custody are included In Appendix C BTEX, MTBE, and TPH-G were not detected in any of samples collected from the three soil stockpiles(SP-1, SP-2, SP-3) TBA, DIPE, ETBE, and TAME were not detected in the samples collected from soil stockpile SP-1 4 3 New UST Excavation Sampling On August 26, 1998, a total of four soil samples were collected from the new UST excavation Two soil samples (NTP-W-14' and NTP-E-14')were collected at a depth of 14 feet BGS from the floor of the excavation at the request of Mr Harlin Knoll of the SJCPHS (Figure 2) The samples were collected directly from the teeth of the backhoe bucket in six-inch-long by two-inch-diameter brass sample sleeves Samples SW-E-6' and SW-N-6'were collected from the side wall of the northeast corner of the new tank pit excavation The sldewalls of the northeast portion of excavation contained concrete and debris backfill material to a depth of 10 feet BGS (site sketch in Appendix A) The sldewall samples were collected using an impact sampler lined with a brass sleeve insert The sample sleeves 17334ust rpt FLUOR DANIEL GTI L�