ARCHIVED REPORTS_XR0012599 - Laserfiche WebLink

Home Browse Search

d F DEPTH TO BROUNDWATERt No recordo of any wells in the immediate vicinity were found, but the Fall 1969 edition of the San Joaquin Co. Flood Control and Watar Conservation District Map, (Plate IV,) show% that the depth to the water tattle is about 15', or 23' below ground surface. ;later depths in monitoring sells to the north of the property were in close agreement with this ma.p. No water or significant mnimtura was eneolentered during excavaticn. LOCATION OF MUNI:.AL & MONITORING WELLS: The latest information availablw to the writer shows that the nearest municipa:,i water wells are approximately 1/? mice to the north and 1/2 mile to the uoutheaut. The neareat monitoring well is about 8/10ths of a mile to the northwest on or near Moffat Blvd. Refer to Plate XI for more detail. PRIOR HISTORY OF SITE: The office adjacent to the UST location is currently vacant, but had been occupied by a Pony Express Courier services the tank was used to saarvice the fleet of vehicles used by the company Thera are no records available concerning fuel usage or amousit of spillage, if any. On August 24, 1989, Jim Thorpe Oil, Inc. removed one (1) 1,010 gallon underground storage tank which had contained unleaded �J gasoline- A Flight gasoline odor wau noted during tank removal, but no sail discoloration or other evidence of leakage was p evident in the spoil removed nr the excavation. The tank and piping were in good condition. The tank was triple-.insect and disposed of properly, (refer to Exhibit"B". ) Two (2) soil samples v:ere taken by Canonie Environmental iaaneath the tank cradles at depths of B' at the nnr}h sand, and 1;)' at the south Band. Refer to Plate VII for loeritions of the twa samples.. The results of the laboratory analyses ,r„howeu detectable amounts of Xylene and TVPH; refer to Table 1 for sdet.LAls. At the conclusion of this 1 work, the excavation was appr•oximatTIy 14' long X 13' wide X 6' deep,. The reaz%?ed spoil, about 25 cubic yards, was placed on plastic in an empty storage yard adjacent to the excavation, (refer to Plate VI. ) I On April 26, 1990, Jim Thorpe 'Gil, Inc. submitted a soil re-exca- vation/resaamplsa workplan (ref or to Exhibit "C",) to enlarge the existing excavation to approximately 22 X 14' X 17' deep, removing an additional 169 cubic yards of spoil. Soil samples ewnry proposed to be taken as shown on Plates VIII & IX_ In £ &ddition, 2 composite samples were to be taken from the excavated spoil to 4ssisat in future soil remediation. REVIEW OF LATEST WORK-PERFORMED. T -1 s On August 7, 1994, Jim Thor-pe Oil, Inc. moved in equipment and began removing soil from the existing excavation. The sediments consisted of very fine to fins sand, tan to brownish-tan, very t 2 -.r