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1 <br /> 1TABLE 3 <br /> ANALYTICAL RESULTS OF WATER SAMPLES <br /> Ripon Farm Service <br /> 22871 South Highway 99, Ripon, California <br /> (IL91L,) <br /> TPH as TPH as Benzene Toluene Ethyl- Xylenes <br /> 1 Sample ID Gasoline Diesel benzene <br /> MW-115-6-94 1,700 2,400 ND ND 35 36 <br /> 1 MW-118-5-94 960 1,200 ND ND 42 5 4 <br /> MW-1111-14-94 320 570 0 7 0 3 ND 1 1 <br /> ' MW-215-6-94 14,000 9,200 1,200 160 380 1,300 <br /> MW-218-5-94 9,400 12,000 880 90 330 450 <br /> MW-2111-14-94 6,000 2,300 780 97 320 350 <br /> ' MW-315-6-94 2,600 6,900 ND ND 6 3 8 <br /> MW-318-5-94 810 1,500 ND ND ND 2 9D <br /> ' MW-3/11-14-94 460 1,900 06 03 <br /> ND <br /> NA-+ol du.o.d <br /> ' <br /> 5.0 CONCLUSIONS & RECOMMENDATIONS <br /> 5.1 Groundwater Gradient and Flow Direction <br /> The groundwater gradient at the site remains very shallow During the September, October <br /> and November 1994 monitorings, the groundwater gradient was calculated to be 0 0005 ft/ft, <br /> 0 0004 ft/ft, and 0 0004 ft/ft, respectively Small fluctuations in the depth to groundwater in <br /> ' one well can produce a dramatic change in the calculated flow direction <br /> In May and October 1994 the calculated flow direction was southwest However, in August, <br /> September and November 1994, the calculated flow direction was northwest Therefore, <br /> ' GeoAudit recommends continuing monthly monitoring to determine the prevailing <br /> groundwater flow direction <br /> ' 5.2 Petroleum Hydrocarbon Impacted Soil <br /> ' Petroleum hydrocarbon impacted soil remains at the site The lateral extent of the impacted <br /> soil has not been determined Additional assessment will be necessary to determine the <br /> extent of impacted soil and to design an appropriate remediation system Assessement of <br /> ' the impacted soil may require the drilling of soil borings on the Jimco property north of the <br /> RFS site <br /> ' <br /> 0..WV-1 A.&6.� 10 <br /> QFUM I WVM S <br />' 1 <br />