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1 <br /> 1 <br /> ' 1.0 INTRODUCTION <br /> USA Petroleum Corporation (USA) has retained Park Environmental Corporation (Park) to <br /> represent USA in matters pertaining to environmental issues at Station #110 located at 2132 <br /> Manposa Road, in Stockton, California as shown on Figure 1 Mr Srikanth Dasappa of USA <br /> ' has authorized Park to prepare this report for assessment of groundwater quality at the subject <br /> site <br /> ' San Joa iun County Public Health Services, Environmental til Health Division (PHSIEHD) is the <br /> environmental lead agency for the site The PHSIEHD references this site with Site Code #1669 <br /> 1 1 Scope of Work <br /> The following is a brief summary of the scope of work authorized by USA <br /> ' • Measure depth to groundwater in all wells on the site, <br /> ' • Calculate groundwater elevations and determine groundwater flow <br /> direction, <br /> I <br /> • Purge three well volumes of groundwater from each of the wells <br /> (MW-1-P, MW-2-P and MW-3-P) and monitor pH, temperature, and ' <br /> conductivity, <br /> • Collect and analyze water samples for total petroleum hydrocarbons (T?H) <br /> ' quantified as gasoline (TPH-G) and diesel (TPH-D), benzene, <br /> toluene, ethylbenzene, and total xylenes (BTEX), and for total <br /> lead using EPA methods 8015,8020 and 7421, respectively, and <br /> ' • Prepare this Quarterly Groundwater Monitoring Report for <br /> ' USA, and submit to PHSIEHD <br /> 1 2 Facility Description <br /> The USA service station is located on the southeast corner of the intersection of East,Mariposa <br /> Avenue and Farmington Road in Stockton, California as shown on Figure I The station has four <br /> ' underground storage tanks (USTs), of which three are 12,000 gallon gasoline tanks and one is a <br /> 3,000 gallon diesel fuel tank as shown on Figure 2 All four tanks appear to be located in the <br /> same tank pit excavation near the Mariposa Avenue frontage of the property <br /> I <br /> i <br /> 500713 2 <br />