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I ' 11 February 2002 AGE-NC Project No 99-0559 ' Page 3of10 ' 23 SOIL SAMPLE COLLECTION The CPT drill ng, equipped with 2-Inch diameter hollow-steal rods fitted with a 1 25-inch diameter ' piston soil sampling assembly loaded with a pre-cleaned brass sleeve, was used to collect soil samples from 80 feet bsg, 110 feet bsg and 135 feet bsg in the twin of boring CPT-2 Upon soil sample retrieval,the brass sleeves were removed from the sampler The ends of the brass ' sleeves were immediately covered with Teflon sheets,sealed with plastic end caps,secured with tape and Immediately placed in a chilled container for transportation were transported under chain-of- custody to MAI a DHS-certified laboratory Each sample sleeve was labeled with the location,boring designation, depth, time, date and sampler's Initials Each soil sample was analyzed for • TPH-g in accordance with EPA Method 5030/8015 Modified, • BTEX and MTBE in accordance with EPA Method 8020, and • MTBE, DIPE, ETBE, TAME, TBA, EDB, 1,2-DCA, methanol and ethanol in accordance with EPA Method 8260M 2 4 INSTALLATION OF CMT MONITORING WELLS On 27 September and 01 through 03 October 2001, four Continuous Multichannel Tubing(CMT) ground water monitoring wells (MW-5 through MW-8) were installed by West-Hazmat Drilling Corp Monitoring well MW-5 was installed at the western property boundary, well MW-6 was Installed at the southern property boundary,well MW-7 was installed directly east ofthe UST release and well MW-8 was installed at 1912 Sutro Avenue,east of the site The location of CMT wells are illustrated in Figure 2 A generalized design of the CMT wells is presented in Figure 7 Based on analytical results of grab ground water samples and interpreted soilprofiles from CPT data, the CMT monitoring wells were designed and constructed utilizing five separate filterpack intervals, from 45-65 feet bsg, 87-100 feet bsg, 125-135 feet bsg, 148-160 feet bsg and 174-185 feet bsg, to characterize ground water gradient, potential contaminant migration pathways and to assess the lateral and vertical extent of impacted ground water west and east of the former UST release On 27 September 2001, West-Hazmat Drilling advanced a pilot soil boring for the installation of CMT monitoring well MW-5 The soil boring was continually cored from 50 feet to 185 feet bsg On 28 September 2001 the well was constructed On 01 October 2001, a pilot soil boring for monitoring well MW-6 was installed approximately and the well was constructed On 02 October 2001, a pilot soil boring for monitoring well MW-7 was Installed and the well was constructed On Advanced Geo Environmental,Inc