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Project 7.13-13. <br /> March 1,1996.'; <br /> Page 3 <br /> Table 2 <br /> Cheaper 1476, 890North.Main Street, Manteca, .California <br /> Groundwater Sample.Analysis Results* <br /> Samples Collected on February 22, 1995 <br /> Sample # TPH-g MTBE Benzene Toluene Ethylbenzene Xylenes .. <br /> MW-1 ND <50 . ND<5 ND <0.5 1.5 ND.<0.5 ND <0.5 <br /> MW-2 ND <50 ND<5 ND <0.5 1.1 ND <0.5 ND <0.5 <br /> MW=3 ND <50 ND<5 ND <0.5 0.80 ND <0.5 ND <0.5 <br /> MW-4 ND <50 ND<5 ND <0.5 0.66 ND <0.5 ND <0.5. <br /> *Sample results are in µg/L or parts per billion. <br /> The sample analyses show that total petroleum hydrocarbons.as gasoline,,MTBE, <br /> benzene, ethylbenzene and xylenes were not detected in groundwater at the well <br /> locations. Detectable levels of toluene were reported for all 4 wells (see Figure 3 - <br /> Hydrocarbon Concentration Map). <br /> The-California-Department of Health Services has established MCLs.(Maxununi. <br /> Contaminant Levels) for benzene, ethylbenzene, aand xylenes. The U:S:EPA. has <br /> established primary and.secondary levels,-for BTEX. These-are compared-with the . <br /> MW4, MW-2, and MW-3 results below. <br /> Table 3: Comparison of January 25; 1995, Sample Results With <br /> �-' Current Action Levels <br /> Sample TPH-g Benzene Toluene Ethylbenzene Xylenes <br /> All wells ND<50'. ND X0.5 1.02** ND <0.5 ND <0.5 <br /> DOHS MCL NA. 1 -NA , 680 1,750 <br /> US EPA Primary NA 5 11000 700 10,000 <br /> US EPA-Secondary NA' NA 40 30 20 <br /> May,1993,update.TPH and-BTEX are in ppb orµg/L NA=Not Applicable. **is average of 4 wells <br /> Parker Environmental Services 190 East 7th Street Pittsburg CA 94565-6116 <br /> Phone (510) 439-1024 Fax (510) 439-2566 <br />