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AFM®AWAFWArm% <br /> San Joaquin/ARCO Meeting Minutes, March 30, 1993 Working To Restore Nature <br /> the depth to water of the first water bearing zone. ARCO told SJ that the <br /> depth to water will be measured during the next investigation and the data <br /> will be forwarded to her. <br /> o Margaret inquired if it was RESNA's policy to allow soil samples to be in the <br /> ice cooler for longer than one day. She said that during a previous <br /> investigation at the site, she saw samples in the ice cooler that were collected <br /> from an earlier day. RESNA stated that samples are typically sent back to <br /> sample control which is located in the Sacramento office via a RESNA <br /> courier or laboratory courier; however, if samples cannot be picked up daily, <br /> geologist are instructed to maintain proper preservation temperature in the <br /> ice cooler. <br /> ARCO SS No. 548, Hammer Lane, Stockton <br /> o RESNA informed SJ that the additional onsite investigation had just been <br /> completed. The investigation included the installation of one onsite <br /> monitoring well and drilling four soil borings. The results of the investigation <br /> will be presented in the next status report. RESNA summarized the results, <br /> stating that hydrocarbons were not detected in soil samples collected from the <br /> soil borings. A groundwater sample was collected from the newly installed <br /> well on 3 /29/93 . <br /> o Mary Meays asked how ARCO was going to respond to the line release that <br /> occurred during the drilling operation. ARCO stated that a vapor-extraction <br /> well would be installed near the release point and would be incorporated into <br /> the future vapor-extraction system. <br /> o Mary asked if further assessment beneath the oil-water separator had been <br /> performed during the recent investigation (total oil and grease [TOG] <br /> detected at 5 It bsg beneath separator during a previous investigation <br /> performed by Environmental Audit). ARCO stated that further assessment <br /> had not been performed and that the separator had been backfilled. RESNA <br /> informed SJ that samples collected from borings B- 16 and 1347, which were <br /> drilled to assess the extent of TOG previously detected in B- 12, did not <br /> contain TOG. Mary said that the two borings should have been located closer <br /> to the waste-oil tank. ARCO stated that the tank has tested tight and that the <br /> investigation was not directed toward the waste-oil tank. In addition, the low <br /> concentrations of TOG detected in the soil may not be petroleum based. <br /> Diane Hinson said that SJc&PHS will accept a WET on a soil sample <br /> 7 <br />