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1 <br /> 20 March 1996 <br />' AGE-NC Project No. 95-0108 <br /> Page 3 of 7 <br />' - HD files. A co of the PHS-EHD Field Inspection Report is included <br /> were not located �n PHS E copy p p <br /> in Appendix B. <br /> 3.2. EXCAVATION OF HYDROCARBON-IMPACTED SOIL, FEBRUARY 1993 <br /> On 04 February 1993, approximately 350 cubic yards of hydrocarbon impacted-soil was_e� <br /> US a,and as-stockpiled-neafby. Park Environmental of Roseville, California <br /> llected nine soil samples from the stockpiled soil and one composite ground water sample'from run- <br /> off water that accumulated in the excavation. Ali samples were transported to Sierra Laboratories in <br /> 1 Anaheim, California for analysis of TPH-d. TPH-d was not detected in the soil or grab water samples <br /> collected from the site. <br /> U 23 March 1993 the PHS-EHD stated that soil sampling performed on 04 February <br /> a letter dated a p g <br />' p 1993 was not witnessed by PHS-EHD staff and soil samples were not collected using preferred, <br /> methodology. Furthermore, the letter states that both soil and water samples should have been <br /> lie <br /> analyzed for TPH-g and BTE&X in addition to TPH-d. Therefore, a request by Park Environmental <br /> to backfill the former UST area with the excavated soil was denied by the PHS-EHD. It is our <br /> understanding the soil remained stockpiled adjacent to the excavation. <br /> 3.3. 1XCAYAIMN <br /> r OF HYDROCARBON-IMPACTED SOIL, JUNE 1993 <br />' On 23 June 1993, mrd RTtrt eav�atie�ilof the former UST area was conducted by,Parkio— <br /> hydrocarbon impacted-soil. Two soil samples were collected from the wall of the <br />' �,�.gedexcavation. TPH was detected in the soil samples at concentrations as high as3;408-ppm. S 00 <br /> Analytical results of the soil samples are summarized on Table 3. <br /> 3.4. EXCAVATION OF HYDROCARBON-IMPACTED SOIL, SEPTEMBER <br /> AND NOVEMBER 1993 <br /> On 10 September 1993, an unknown volume of hydrocarbon-impacted soil was-excavated from the <br /> former UST area under the direction of Park Environmental. Seven soil samples were collected from <br />' the sidewalls and floor the excavation; sampling was witnessed by representatives of the PHS-EHD. <br /> The soil samples were transported under chain-of-custody to Anlab of Sacramento, California. The <br />' samples were analyzed for TPH-g, TPH-d and BTE&X in accordance with EPA methods 8015m, <br /> 8015m and 8020, respectively. <br />' Petroleum hydrocarbons were detected in soil samples collected from the excavation at <br /> concentrations as high as 1,400 ppm (TPH-d, SW-1-P; 11 feet bsg). Petroleum hydrocarbons were <br />