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• Frontier Transportation B2350201 May 5, 1997 Page 3 S 11+Id>r>ultori�a€g i? ells MVS 1 thou N ssatp Darasxen Tatuettc00, c �Cykn ,crxx rsn r .0 Cal: 98 18.8 55.8 130 1,800 1,300 <50 4/21/97 31 <03 2.8 1S 520 910 68 � Moaufanng We#I A!IW� 8/30/96 12.7 7.9 4-5 120 850 12.3 95 4/21/97 6.4 <0.5 2.2 0.7 73 <5.0 250 Momts3rrrtg_V1►c11 MW 3 8/30/96 610 170 96.6 540 8,000 1,700 610 4/21/97 3,200 2,000 1,400 1,000 30,000 14,000 1,500 TPH-G = total petroleum hydrocarbons-gasoline range MTBE = methyl tertiary butyl ether . TPH-D = total petroleum hydrocarbons-diesel range µg/L = micrograms per liter < = less than the indicated method detection limit Analytical results of groundwater samples collected from monitoring wells MW-1 and MW-2 indicate that volatile petroleum product constituent (PPC) concentrations have decreased since installation while semi-volatile PPC concentrations in these same wells have apparently increased. The analytical results of groundwater samples collected from monitoring well MW-3 indicate that PPC concentrations have shown an increase since installation. DINCUSSIQ Analytical results from the initial groundwater sampling event in August 1996 indicated that there was only moderate attenuation in dissolved PPC concentrations between monitoring well MW-3 (well with the highest PPC concentrations) and monitoring well MW-1 (downgradient well). The April 1997 analytical results of groundwater samples indicate a two to three order of magnitude drop in PPC concentrations between these same monitoring wells. LIMITATIQN$ The purpose of this report is to present analytical data from samples collected from monitoring wells and provide our interpretation of the water table configuration based on • our water level measurements. Our interpretation of analytical test results is not provided.