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I shows the gradient as measured on 9/16/1996 ; MW-9 was included, but MW-3 was inaccessable at the time and depth to water could ' not be determined. The gradient direction had shifted about 30 degrees to the northeast ; it varied from about . 01 ' /ft near MW-1 to between 0014 ' & 002 ' /ft at the northeast These measure- ments are in close agreement with the regional gradient in this area PLATE VITA shows lines of equal concentration of benzene based ' upon the July & September sampling events MW-1 thru MW--8 were sampled in July, the second quarter monitoring event , MW-9 had not yet been installed MW-9 was developed and sampled on ' 9/16/1996 , only water level measurements were taken on MW-1 thru MW-8 , since the next quarterly event was not due until October, and the additional expense could not be justified at the time ' All nine (9) wells will be sampled during the third quarter monitorining event PLATE VIIA shows the existence of two distinct & separate plumes ' The easterly one had been identified during earlier work, it was caused by leaking UST' s to the south and east of MW-5 on the Nomellini property Although gasoline compounds had been detected in the removed septic system, Auger Hole "A" , and monitoring wells #1 & #2 , the source had not been identified MW-8 & MW-9 were installed for the purpose of attempting fromtin the find that source or sources MW-9, located up-gradient Independent Trucking site, contained extremely high levels of benzene in both soil and water samples , water analysis from the September sampling measured 10, 800 ug/L, the soil sample taken at ' 2016 (in the "smear zone, " ) measured 23 , 500 mg/kg These concentrations are far higher than detected in any of the work done on site to date . PLATE VIIB shows lines of equal concentrations of toluene from the same events Again, MW-9 recorded levels far in excess of anything found to date - 9 , 840 ug/L The soil sample at 2016" measured 158 , 000 mg/kg. PLATE VIIC - lines of equal concentration of ethylbenzene - shows ' the same pattern, and supports the existence of a major source of contamination to the west That compound was measured at 3 , 360 ug/L in the water, and 523 , 000 mg/kg from the soil sample at 201611 PLATE VIID - lines of equal concentrations of xylene - continues to indicate the existence of a mayor source to the west , the ' water sample measured 14, 000 ug/L, and the soil at 2016" showed 287 , 000 mg/kg MW-7 recorded 0 8 ug/L of xylenes and 6 9 ug/L of i ' 10