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N <br /> W(93140 Gold Camp Drive, Suite 160 <br /> . Rancho Cordova, CA 95670 <br /> 16) 853-9293 • FAX (916) 853-9297 <br /> February 17,2000 BSK`No:L07� 0230 <br /> Mr.Kevin Post <br /> Ursa Engineering <br /> 3963 Eastside Road <br /> Redding, CA 96001 <br /> SUBJECT: Summary of Geoprobe Sampling Analytical Results <br /> Jiffy Lube . <br /> 1130 North Main Street <br /> Manteca,California <br /> Dear Mr. Post: <br /> Attached please find the laboratory analytical results of one soil sample and one groundwater sample obtained <br /> from beneath a former waste oil underground storage tank(UST). <br /> BSK conducted field activities on January 28,2000. A Geoprobe direct-push drill rig was used to advance one <br /> soil boring (GP-1A)at the location shown on Figure 1 (attached). The boring was advanced under permit by the <br /> San Joaquin County Public Health Services,Environmental Health Division(PHS-EHD). One soil sample was <br /> collected at a depth of approximately 14 feet below ground surface. Subsequent to collection,the ends of the <br /> sample tube were covered with Teflon film and sealed with plastic caps. The sample was labeled and packaged <br /> in a cooler with"blue ice,"and submitted to BSK's State-certified analytical laboratory for chemical analysis of <br /> fuel oxygenates by EPA Method 8260. <br /> The Geoprobe was advanced to a depth of 24 feet bgs, at which depth a groundwater grab sample was collected. <br /> The water sample was collected by exposing a screen in the lead Geoprobe rod, and retrieving water from the <br /> boring with a"Tubah®"hand pump. The water sample was labeled,placed in an ice chest cooled with"blue . <br /> ice,"and submitted to BSK's State-certified analytical laboratory for chemical analysis of fuel oxygenates by <br /> EPA Method 8260. <br /> The soil boring was backfilled via tremie pipe with neat cement grout, and patched to grade with asphalt patch. <br /> Grouting activities were observed by Mr. Jeff Wong,PHS-EHD. <br /> Table 1 presents the analytical results of the soil and groundwater samples. Fuel oxygenates were not detected in <br /> the soil and groundwater samples. A copy of the laboratory report is attached. <br /> We appreciate the opportunity to be of service to Ursa Engineering. If you have questions regarding this report, <br /> or if we can be of additional service,please do not hesitate to contact us. <br /> Respectfully submitted, <br /> BSK&Associates <br /> Richard E.Johnson, CEG <br /> Branch.Manager <br /> Distribution: <br /> Mr. Kevin Post(1 original, 1 copy) <br /> Mr. Jeff Wong,San Joaquin County(1 copy) <br /> Geotechnical Engineering • Engineering Geology • Environmental Services - Construction Inspection&Testing • Analytical Testing <br />