ARCHIVED REPORTS XR0009215 - Laserfiche WebLink

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during most of the operation The crew grouted the bole in the same manner described earlier, and moved the probe truck to the spot marked for SP-4, as shown on PLATE V Work began at 1400 after all equipment had been decontammated Pipe was pushed and driven to 40', and was raised a short distance to release the tip A tape was run which showed immediate water entry Four VOA's of slightly muddy water were filled, after a few minutes, very fine sand had filled the bottom 1/3rd of each VOA There was no odor or other evidence of contamination The pipe was driven to 60', and pulled up to 52' The rods were run to check for entry, when retrieved they were wet A clean stainless steel bailer was run on monofilament line and 6 VOA's were filled with turbid water The first VOA was very muddy & silty, and very fine sand settled to the bottom The remaining containers contained a high percentage of silt, but were not as muddy There were no odors or other evidence of contamination noted in any of the samples or bailer All of the VOA's were labeled and placed on ice pending transport to TEG for analysis The hole was grouted with a cement/bentonite slurry in the same manner as previous ones Steve Sasson of the San Joaquin Co EHD was present during the operation, and witnessed the grouting of the hole Mr Hunter left the location at 1530 hours DISCUSSION OF RESULTS OF ABOVE WORK: . 'TABLE XV summarized the results of the laboratory analyses of this work The water sample taken from SP-1 (located adjacent to the Shell station - see PLATE V,) at 43' measured 66 ug/l of TPH The laboratory stated that it's signature was not typical of gasoline BTEX, MTBE, TBA, ETBE, DIPE, and TAME were all below detection limits This indicates that the substance detected was most likely associated with the Shell station and not from Castle Motors, some 150 feet to the west SP-4, located on Adams street about 125 feet southwest of the site (see PLATE V,) did not detect any components in water samples taken at 40' and 60' The water sample taken at 40' from SP-5, which was located about 52' west of the subject site, was below detection limits for aH tested compounds A water sample could not be obtained at 60' due to plugging of the sampling equipment i SP-5A, located 3 112' east of SP-5, was taken to 60' The water sample taken at that depth 71 ug/l of TPH as gasoline BTEX, MTBE, TBA, DIPE, ETBE, & TAME were all below detection limits The soil sample taken at 3 5' from SP-6, 60' north of the site, was below detection limits for BTEX, TPHg, and MTBE TBA, ETBE, DIPE, & TAME were not analyzed A water sample was not taken at that depth The water sample from 60'bgl revealed 780 6