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If �" <br /> NMELa ,M, BALBI & CHANG ASSOCIATES <br /> _`- GEOTECHNICAL CONSULTANTS s MATERIALSTES7ING <br /> i <br /> April 24, 1989 <br /> File No 1705-2 <br /> Mr Don Roek <br /> Roek Brothers <br /> P 0 Box 30038 <br /> EStockton, CA 95213-0038 <br /> Subject Report of Test Boring and Monitoring Well <br /> i Installations - 102 So Wilson Way <br /> I Stockton, California <br /> Dear Sir <br /> The firm of Balbi & Chang Associates has now completed additional test borings and <br /> monitoring well installations in accordance with the proposed exploration program <br /> { contained in our September 1, 1988 preliminary report This report contains a <br /> summary of previous findings and the results of the current phase of field invesn <br /> tions and chemical analyses <br /> In general, this phase of work resulted in the identification of no significant Iev <br /> els of <br /> fuel in shallow soils at the site No contamination of soils beneath the main fuel tank <br /> area was identified in this current effort Yet water acquired from well MW-3 exhib- <br /> ited significant levels of benzene and other fuel constituents It is our opinion from <br /> the data now available that these high levels of fuel components may have migrated <br /> from some as yet unidentified off-site source <br /> If you have any questions regarding this report, lease contact either <br /> signed at (707) 864-2020 p Cher of the under- <br /> Very Truly Yours, <br /> BALBI&CHANGASSOCIATES <br /> 1 <br /> I D 2n&AA.-.RR ii c h e s i 2 - 1 <br /> Engineering Geologist <br /> CE1055 - <br /> Nl <br /> R� I d� <br /> f ENT n LTN <br /> Phh' L Chan E <br /> f Pri ipal Engi er I y <br /> GE 204 t �_. APR 241989 <br /> DAR PLC do CIS! IfC <br /> i Encl f�I~113�/SE VtC S ZfH <br /> cc Ms Jeanne Zolezzi <br /> 0 151 Link Road, Suite A o Cordella, CA 94585 (707) 864-2020 o Fax (707) 864-8886 Ll <br />