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r.► <br /> SELF-MONITORING SAMPLE PROGRAM <br /> Permittee: Thrifty Oil Co <br /> Location: 7647 Pacific Ave.,Stockton <br /> Effective Date: June 1, 2008 <br /> Permittee shall perform the following self-monitoring sample program: <br /> Parameter Frequency Type Location Discharge Analytical <br /> (diagram attached) Limit Method <br /> Flow Continuous Metered 001-Final discharge 10 GPM N/A <br /> and <br /> 14,400 gals. <br /> per day <br /> Lower Explosive Continuous Metered and 001-Final discharge 10% N/A <br /> Limit(hexane) recorded <br /> pH *Once per month Grab,well mixed 001-Final discharge 5.0- 10.0 <br /> and representative <br /> of reporting period <br /> Total *Once per month Grab,well mixed 001-Final discharge 100 mg/1 EPA 1664 <br /> Petroleum and representative <br /> Hydrocarbons of reporting period <br /> Benzene *Once per month Grab,well mixed 001-Final discharge Total= <br /> Toluene and representative 4.57 mg/l EPA 8260 <br /> Ethylbenzene of reporting period Benzene= <br /> Xylene 0.5 mg/1 <br /> Methyl-t-Butyl *Once per month Grab,well mixed 001-Final discharge Below EPA 8260 <br /> Ether(MTBE) and representative detection MDL= <br /> of reporting period limit 0.5 gg/I <br /> Di-Isopropyl <0.5 µg/1 <br /> Ether(RIPE) <br /> Ethyl-t-Butyl <br /> Ether(ETBE) <br /> t-Amyl Methyl <br /> Ether(TAME) <br /> Page 1 of 3 <br />