Laserfiche WebLink
lip <br /> ti <br /> ' VWULLAM KINIL&A9W1ATE5.W <br /> SOILS SAMPUNG AND TESTING . 1. <br /> WOOLSEY OIL, INC. <br /> Decomber 11, 1989 <br /> WIfA No. 89.194.3 t✓`�` `� ` <br /> Page 2 1 <br /> aEC Oa f98 <br /> Laboratory test results indicate that the samples obtained from the Waste NCAfR*�fi 6 AL H'M <br /> stockpile <br /> p are contaminated with TPH, 'BTX&E and tetrachloroethcne (see attached Tables 1, 2, <br /> 3,4 and 10). However, test results also indicate that the soils at the base of.Waste Oil Tank #10 <br /> excavation(sample TPt0)contain non-detectable concentrations of the above constituents and only <br /> 1.0 mglkg bis (2-ethylhexyl) phthalate, indicating that the contaminated soils h�►ve been successfully <br /> removed from the excavation;0.6 mg/kg bis(2-ethylhexyl) phthalate was detected in tank excavation <br /> 11. Total petroleum hydrocarbons were detected in tank excavations 4, 5;`and $(Tables 3 and 41. <br /> Based upon the laboratorytest resuits and our observations during tank removal,we conclude that <br /> extensive contamination of the soils in tank`excavations 1, 2, 31 6,'7, 9, 10 and 11',has`not occurred <br /> and that additional work in these areas is not necessary. We recommend backfihin these <br /> g <br /> emcavations upon approval by the San Joaquin County local health district. <br /> We recommend the overexcavation of soils in tank excavations 4, S and $ until laboratory testing <br /> -~-� indicates iron-detectable concentrations of TPH and BTX& as r San::Joaquin Count <br /> ? requirements. Contaminated soils generated during excavation and the:contaminated waste oil tank <br /> stockpile can then be disposed of or remediated in accordance with San Joaquin County protocol. <br /> Our conclusions and recommendations are based on our assessment of conditions indicated to exist <br /> as of the date of our'field work, November 10, 1989., The results of this investigation do not <br /> preclude the possibility of hazardous materials being prescnt`on the property in areas,wc did not <br /> ! investigate. This report is applicable only to the investigated property and should not be used for <br /> any"other property. <br /> Wallace - Kuhl & Associates, Inc. <br /> �Eo GFo <br /> ANTHONY'dO <br /> . <br /> I ' N, Into —1 <br /> Anthony no <br /> Senior Geologist cEar+IM <br /> : ENG NEE*6 UVXOMI <br /> fMN3 ; <br /> AS.-dm 1,rr� 0F,CA``,�� <br />