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George F. Schuler, Ina <br /> 1705 N. Broadway, Stockton, California August l7, 1993 <br /> Phase I Remedial Report Page: 6 <br /> 6.0 Conclusions and Recommendations <br /> With the exception of an isolated interval of xylene and gasoline at 36 feet in B-2 (Figure <br /> 6), a contamination plume exists around MW-1 from the remedial pit floor at 30 feet to <br /> approximately 55 feet below ground level. Also, there is benzene and E-benzene in the <br /> monitoring well MW-1 sample. <br /> The groundwater contamination will require a minimum of three properly positioned: <br /> monitoring wells in order to determine the groundwater gradient, and to help define the <br /> groundwater contamination plume. Borings B-2 and B-3 are positioned and completed as <br /> soil gas extraction wells to provide remediation of the soil contamination plume around <br /> MW-1. Vaccuum testing will have to be conducted on these wells to determine the radius <br /> of influence, and the necessity for additional vapor extraction wells. <br /> The above represents our best professional opinion as to environmental conditions at this <br /> p p F <br /> site. These opinions were derived using data at hand, and using standards of care conL-non <br /> to the environmental consulting community in Northern California. Additional work or <br /> sampling at this site may generate data that could lead to a change of opinion regarding <br /> site conditions or appropriate site remediation procedures, or both. <br /> Prepared by: <br />' 1RONC9;,P <br /> �.Q .q�y <br /> Into_02157 <br /> • Expires: <br /> Michael I Klobefdanz, REA, REHS tin Q <br /> California Registered Environmental Ass or#02157 <br /> California Registered Environmental „alth Special' 783 �At' <br /> OF PQ <br /> %GATe My <br /> 4613 <br /> i s AIPG <br /> ouis D. Smith, C 'i}" <br /> Certified Prof sional Geologist#4613 <br /> ES& <br /> Me li <br /> tvo. <br /> J 22 339 M <br /> A, Lee DeLano, P4M P.E. EXP.9.30-93 �►" <br /> Registration # 22339 sf crw- �Q <br /> 9 OF CA>~�F�Q� <br />