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Mr.john Johnm <br /> Project 113-264)Z December 16,1993 <br /> Page 4 <br /> Table 2 - Laboratory Analysis Results <br /> Cheaper! Store #37 <br /> 15 East Grant Line Road, Tracy, California <br /> Groundwater Samples Collected on November 30, 1993 <br /> Sam le FHi Benzene Toluene Ethylbenzene Xylenes <br /> MW-1 160 ND<0.5 ND<0.5 6.4 a57 <br /> MW-2 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5. <br /> MW-3 ND<50 ND<0.5 ND<0:5 ND<0.5 ND<0.5 <br /> MW-4 41,000 2,200 920, 2,40 ,.. 6,800 _ <br /> TPH-g and BTEX`are in parts per billion, orµg/L. ND - Not Detected t <br /> • Iy- <br /> D <br /> The sample results show detectable amounts Fof�petroleum hydrocarbons' dal <br /> constituents in MW-4, and detectable amounts of TPH g, Ethylbenzere ari_d1 Xylenes 4 <br /> in MW-1". '. F , <br /> The State Vl�ate> Qtaity Cintnol Board published the LLIFTIdlaOUa10 �8 : , <br /> page 8),which lists Maidmum Contamina nt'Levels;of regiilatory tlueshold for the <br /> substance. The substances are Benzene, Xylene and Ethylbenzene. Toluene has a <br /> Department of Health Services Action Level. These are compared with the MW-1 <br /> andresults below: <br /> Comparison of Sample Results With <br /> RWQCB Maximum Contaminant Levels (MCL) <br /> and DOHS Action Level (AL) T <br /> Sample TPH-g Benzene Toluene Ethylbenzene Xylenes <br /> MW-1 160 ND<0.5 ND<0.5 6.4. 0.57 <br /> MW-4 41,000 2,2410 920 240 61800 <br /> MCL (RWQCB) NA 1.0 NA 680.0 11750.0 <br /> AL (DOHS) NA NA 100.0 NA NA <br /> TPH and BTEX are in parts per billion orµg/L. NA= Not Applicable. Concentrations above the action <br /> levels are in boldface. <br /> f <br /> Parker Environmental Services, 190 East 'nth Street, Pittsburg, CA 94565-2317 <br /> Phone (510) 439-1024 Fax (510) 439-2566 <br />