Laserfiche WebLink
File No 43991 <br /> 12 June 2000 <br /> Page 3 <br /> • Dark grayish brown stiff silty clay with gravel between the depths of 3 5 to 8 feet bgs, <br /> • Light olive brown soft silty clay between the depths of 8 to 1 I feet bgs, <br />' • A 6-inch thick lens of well sorted gravel that was saturated,and <br /> • Dark grayish brown stiff silty clay below the depth of 115 feet bgs <br />' ACG notes that the gravel used to backfill the piping removal trench extends to a depth of 0 5 <br /> feet below the P-7 sample depth of 3 feet bgs ACG assumes this difference of 0 5 feet was <br /> removed during the sampling process or is a result of change in surface grade <br /> We have attached the analytical laboratory report from Geoanlytical Analytical results for <br /> this investigation and UST removal activities are listed in Table l Geoanalytical did not <br />' detect ethanol in either soil sample,or the grab-ground water sample,at or above the reporting <br /> limit of 200 ltg/Kg for soil and 200µg/L for ground water <br /> Discussion <br /> The lack of ethanol detected in soil and ground water below former piping sample P-7 <br /> indicates that ethanol detected in sample P-7 has not migrated to ground water and is confined <br /> 1 in soil between the depths of 3 to 6 feet bgs Ethanol was not detected in the other original <br /> piping samples (P-1 through P-6) or any other sample associated with the UST removal <br /> process ACG recommends that further investigation of the ethanol tank is not necessary and <br /> San Joaquin County grant closure of the site <br /> Please contact us if you have any questions or comments <br /> 1 Sincerely, <br /> ANDERSON CONSULTING GROUP <br /> dro es B Ackerman,R G Dennis B Nakamoto,C E G,C H <br /> James <br /> Geologist Environmental Director <br />' Cc Kevin Fitzpatric,The Cranbrook Group <br /> Scott Selken,AMI Group Inc <br /> Attachments <br />' Figure 1 —Vicinity Map <br /> Figure 2—Site Plan <br /> Table I —Analytical Results of UST Removal and Site Investigation <br /> Attachment A-Boring Log <br /> Attachment B—Certified Analytical Report <br />' s lenvironmentallcurrentjobs14399 hemz plant tank investigation14399 report doe <br /> ANDERSOM COiNSULTIMG GROUP <br />