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:13i02/19G0 1Z-00 ]'t^EL1.FJP( L.A. 21Z tea ^467 P.12 Iona Pro Phase II Vital Ptt l Assessment Pap' S During the on-site sample collection conducted on January 24, 1990, seven (7) shallow subsurface soil samples were collected from approximately 15 foot of depth. These samples were collected by California split spoon sampler. These samples are identified as B-1 through 3-7 (Figure 3 &5). -- Sample B-1 was collected a roximatzly 25 foot east of the fuel dispensing island. Durng s g, contamination was en:ountsred from approximate y of dcp u sc . C. ":,ia awsly ra vi as ya a ' � were y an on-site mobile laboratory. The anrdytiml results from the sample collected at the bottom of the boring indicates that 1,500 parts per million (ppm) on diesel hydrocarbon, and 170 ppm gasoline hyd:nearbon were detected. No benzene, toluene,ethvl benzene, or xylene were detected. other samples -� cnllec-W f Sb-R-a non-detected for the aforem h rocarbons at the bottom of each boring (Appen uc Dr— ..----_. !: This shallow subsurface investigation has determined that heavy soil contamination does exist on the subsurface due to an unauthorized release of petroleum hydrocarbons from the pump island. Further investigation of the subsurface will be necessary to determine the lateral movement of the contamination. Also a question of impact to ground water. San Joaquin County I-ocal Health District has no pending action to this matter except the tank permits. T It is the onWon of the writer that the investigation has discovered only a single location at the fueling station that has itnp:a. rr}' an esngauonTVM be — aacrssary t your=organisation wishes to pursue flus punt ase. Zlirthkieef, ng to the — T_- county-or City-Sew __ wou _re e_v_e_the_requirement treatment of both_compressor—-— and boiler blowdown waters. Finally, have the domestic water system serviced by a 'licensed company, nj c conclusions of this report are based on facts and information available as of the date of the field work. Activities conducted at this site afar this date should employ good `J environmental practices to maintain current conditions rind environmental status.