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E29,April 2005 AGE-NG Proj ect No. 98-0440 Page 5 of.18 t f' report of findings (Quarterly Report - First Quarter 2000; dated'1,4,May 2002.) was Esubmitted by AGE to the SJCEHD: _ . - s -•.. October.2002 -_One ground water,monitoring well was,installed at the,site (MW. 10) and three ground water monitoring wells"were installed'on the neighboring and down-gradient ' ' r owned b 'the Ha Grower's Association. A. total of eight soil samples were property, Y Y g collected and analyzeddfor TPH-g,BTEX,EDB, 1,27DCA'and the suite of five fuel additives, ' including MTBE.No,analytes were detected at or above laboratory reporting limits in the soil ' ' sample analysis. Boring locations are depicted in Figure 2 and analytical results of soil samples are presented in Table 4. A report of findings (Quarterly Report-Fourth Quarter ; 2002, dated 10 March 2003) was submitted by AGE,to the SJCEHD: _ j March 2004 - Ground watermonitoring wells MW-11 and MW-1.2 were installed on the_ r neighboring and down-gradient property, owned by the Hay Grower's Association. A total ; of four soil samples-.were collected and analyzed for TPH-g and BTEX: No analytes were detected at or above laboratory reporting limits in the soifsample analysis. Boring locations ' r are depicted in Figure 2 and analytical results of soil samples are presented in Table 4. A report of findings(Quarterly Report-First Quarter 2004, dated 26 July 2004)was submitted I0 by AGE to the SJCEHD. Vertical soil lithology and petroleum hydrocarbon impact to soil is depicted in cross sectional view in Figur`es`4, 5 and 6. petroleum hydrocarbon impact to soil and ground water is depicted in plane r view in Figures 7, 8 and 9. 4.0. SITE CONCEPTUAL MODEL ' ' Based on the subsurface investigations at the subject property,a mottled,pale brown and red-brown, stiff,clayey At/silty clay was encountered from surface grade to depths of approximately 5 feet bsg in' each boring. A pale to, dark gray-green, silty,..medium dense, 'poorly,sorted fine sand,was• encountered at10 feet bsg in all the borings,on-site with the exception of B7, MW-4, MW-9 and le brown to ale ra stiff'sil cla was encountered from 10 feet to 20 feet bsg. A , ' - . MW-10. A pa p g y, _ � tY Y pale brown,medium dense,poorly'sorted,silty fine sandwas encountered at depths between 20 feet and-25 feet bsg in borings B1,B4; B7, MW-1, MW-6,MW-7 and MW-8.'A dark brown, very stiff, silty clay wasencountered•at depths.greater than 25 feet bsg. The sand at 10 feet bsg appears,to have a north-northeast to south-southwest orientation; the sand at 20 feet bsg appears to have a east-northeast to west-southwest orientation and limited lateral extent. ' AdvancedGcoEnvironmental,Inc.