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! L .� Ly Report-Soil and Groundwater Investigation Gateway Pro' 1 4 dry April 10,220z0 Page - indicated that the site had been assigned to the SJCPHS/EHD Local Oversight Program_ At the request of Mr. Ron Palznquist of the City of Stockton, Ms _Suzanne Sullivan of Suzanne Sullivan Real Property _ - Services,:and-Ms.:Deedee`Antypas of Siegfried, Condor prepared the Work Plan—Soil and.Groundwater Sampling by--Direct Push (Geoprobe),-dated March 10, 2000. Ms.-.Duncan of the SJCPHS/EHD approved the work plan in a—facsimile transmission dated March 20,2000. INV 3. FIELD � . _ - _ _... • � r - INVESTIGATIONAND LABORATORY ANALYTICAL RESULTS 3.1 SITE PREPARATION Condor scheduled and coordinated the field activities through Siegfried'4 Prior to initiating the fieldwork, � .. Condor completed a'dnliirig permit application and obtained the required permit from.the SJCPHS/EHD. In addition, Condor applied for and obtained an encroachment permit from.the City of Stockton Public. Works Department for the boring to be drilled'in'El Dorado Street. The proposed boring locations were marked with white paint and UndergroundService Alert (USA) was notified approximately 72 hours in advance of the fieldwork to locate and identify underground utilities in and near the location of each - - proposed bofing at the site :Y - k, 3.2 GEOPROBE BORINGS y Five Geoprobe borings (GPI through GP5) were installed at the site on March 30 and 31, 2000; by V & _.W .Drilling, Inc. of:Isletoii, California. Prior to commencement of the fieldwork; a tailgate safety meeting was held and a site-specific Health and Safety Plan was discussed with, and presented to, all field personnel for their si ,. atures. Geo robe boring GP-; was installed approximately in the center of P _ gn P g . _ PP y the location of former Tank 2. Geoprobe borings GP2, GP3, GP4 and GP5 were installed approximately , .20 feet to the east, south, west and north-of-GPI,respectively. The Geoprobe boring locations are shown P P g in Figure 2,"Appendix A. The'upper approximately:four feet of each baring was advanced with a two.-inch diameter hand-auger to T _ assist with clearing each boring of.near surface obstructions (including utilities that'ma have not been ( g Y identified in.the USA process).;The Geoprobe borings were then Hydraulically advanced using a 2-inch. y diameter. conicai bit'.'._: The rods :and bit.were decontaminated before each boring was:drilled using_ -T. laboratory grade, _non phosphate detergent and de-ionized water and double.rinsing°with de-ionized L1� CONDOR