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i <br /> 19 February I996 <br /> AGE-NC Project No 95-0104 <br /> Page 4 of 4 <br /> included to Appendix B <br /> I5.0. CONCLUSIONS & RECOMMENDATIONS <br /> Dissolved petroleum hydrocarbon concentrations:n ground water decreased in monitoring well MW- <br /> 1, and were not detected from momtonng wells MW-2, MW-3 and MW-4 All detectable <br /> concentrations of petroleum hydrocarbons continue to remain below State of California Maximum <br /> Contaminant Levels (MCLs) or Action Levels (ALs) for drinking water <br /> Several HVOCs continue to be present in each well on the property No overall increase or decrease <br /> ofHVOCs was observed during the January 1996 sampling Of the 15 constituents detected for all <br /> wells, concentrations slightly increased for ten analytes and slightly decreased for five analytes <br /> A Corrective Action Plan and an addendum, recommending soil vapor extraction as the preferred <br /> remedial option for the site, was submitted to the PHS-EHD Upon approval, installation of the soil <br /> remediation system should commence <br /> 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based mainly upon <br /> analytical results provided by an independent laboratory Evaluations of the geologic/hydro- geologic <br /> conditions at the site for the purpose of this investigation are made from a limited number of available <br /> data points (n a soil and/or ground water samples), and subsurface conditions may vary away from <br /> these data points No other warranty, expressed or implied, is made as to the professional <br /> recommendations contained in this report <br /> I <br /> I <br /> i <br /> I <br /> I <br />