Laserfiche WebLink
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 USA's rental service station#110, <br /> located at 2132 Mariposa Road, in Stockton, California (Figure 1) Mr. Snkanth Dasappa of <br /> USA has authorized Park to prepare this report presenting quarterly monitoring results for the <br /> subject site <br /> San Joagiun County Public Health Services, Environmental Health Division (PHS/BHD)is the <br /> environmental lead agency for the site The PHS/EHD Site Code is#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, flow direction and gradient, <br /> Purge a minimum of 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 conductivity, <br /> • Collect and analyze water samples for total petroleum hydrocarbons (TPH) <br /> quantified as gasoline (TPH G) and diesel (TPH D), benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX) and for total lead using EPA methods <br /> 8015,8020 and 239 2,respectively, and <br /> • Prepare this Quarterly Groundwater Monitoring Report (QMR) for USA, and <br /> submit to PHS/EHD <br /> ' 1.2 Facility Description <br /> The USA service station is located on the southeast corner of the intersection of East Manposa <br /> ' Avenue and Farmington Road in Stockton, California, as shown on Figure 1 The station has <br /> three 12,000-gallon gasoline tanks and one 3,000-gallon diesel fuel tank, as shown on Figure 2 <br /> The tanks all appear to be located in the same tank pit on the Manposa Road side of the property <br /> 2.0 GROUNDWATER MONITORING WELL SAMPLING METHODOLOGY <br />' 2.1 Groundwater Elevations <br /> Depths to groundwater measurements were collected on June 23, 1995, using an electronic water <br />' level indicator The depths were measured from the top of the surveyed well casings <br /> Groundwater measurements collected during this and previous events are presented in Table 1 <br />