ARCHIVED REPORTS XR0001000 - Laserfiche WebLink

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septic tank also removed Excavation left open August, 1993 - Five (5) auger borings placed in area of leach field to depths ranging from 32' bg1 to 421 bgl; the presence of petroleum hydrocarbon substances was detected in soil & ground- water Three (3) hand -auger borings were placed in and adjacent to the site of the removed leach field. Locations of that work are shown on PLATE VI, more complete details are given in prior reports Refer to TABLE I for a summary of laboratory analyzes of the work done November, 1993 - Two hand -auger samples were taken 51 & 10' west of the second chamber of the concrete septic tank, (which is still in place,) to depths of about 121 bgl. The samples were analyzed for kerosene, diesel, & motor oil, the east sample was below detection limits, but the west sample measured 20 mg/kg of TEPH The excavation was filled with clean material, we do not have details of that work. September 30, 1994 - A 1,000 gallon waste oil tank was removed from a site adjacent to the wash rack by Jim Thorpe Oil, Inc , it's location is shown on PLATE VII Soil samples were taken from the excavation & the spoil pile, and analyzed for BTEX, TPHG, TEPH, EPA 8010, EPA 8270, & CAM-TTLC 10 metals The results of those analyzes are summarized on TABLES II, III, IV, & V The excavation was filled with clean material, and the spoil pile moved to a site adjacent to the diesel tanks Laboratory worksheets were included with the November workplan October 4, 1994 - Jim Thorpe Oil, Inc removed a 10,000 gallon, a 5,000 gallon, and a 3,000 gallon UST which had contained diesel fuel, refer to PLATE VIII for their locations Soil samples were taken from beneath the tanks & the fill line connecting the two sets, as well as along the product line leading to the northeast end of the shop building. Details of that work has been discussed in detail in prior reports Results of laboratory analyzes are summarized on TABLE VI November 7, 1994 - Wm. J Hunter & Associates, (WJH,) submitted a workplan to the CRWQCB for placing three (3) soil borings, (& converting one to a groundwater monitoring well,) for the purpose of attempting to determine the source and extent of hydrocarbon contaminants found in the groundwater in the vicinity of the leach field A copy of that workplan, (w/o exhibits,) is included as EXHIBIT A December 7, 1994 - Jim Thorpe Oil, Inc submitted a workplan to the San Joaquin County EHD proposing to overexcavate the site of 3