Laserfiche WebLink
, <br /> 1.0 INTRODUCTION <br /> 650 Management Corporation (Client) has retained Park Environmental Corporation (Park) to <br /> perform quarterly groundwater monitoring at 151 South Main Street in Manteca, California A <br /> Site Location Map and Site Plan, showing the location of the various wells, are shown on Figures <br /> 1 and 2 The work performed and described in this report has been mandated by the lead agency, <br /> the San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD), and <br /> was performed in accordance with the workplan dated May 24, 1994 and supplemented January <br /> 13, 1995, which was approved by PHS/EHD <br /> ' 11 Scope of Work <br /> Specific tasks completed by Park during the groundwater morutoring program included the <br /> following <br /> Locate and measure depth to groundwater in all the wells, <br /> • r minimum of three well volumes of groundwater from each of the wells <br /> Purge a <br /> (BEI-MW-1, BEI-MW-2, BEI-MW-3, SRK-MW-I, SRK-MW-2, and SRK-MW- <br /> 3)until pH, temperature and electrical conductivity values were within 10 percent, <br /> • Collect groundwater samples from all existing wells, <br /> • Analyze water samples for total petroleum hydrocarbons as gasoline (TPH G) and <br /> I <br /> ' benzene, toluene,ethylbenzene,total xylenes (BTEX), and total lead (TPb) using <br /> EPA methods 8015 Modified, 602 and 239 2, respectively, and <br /> S Prepare this Quarterly Groundwater Monitoring Report for presentation to the <br /> PHS\EHD <br /> The PHS/EHD was notified in advance that the sampling date was June 30, 1995 A County <br /> representative was not present to observe the sampling <br /> 2.0 GROUNDWATER MONITORING WELL SAMPLING METHODOLOGY <br /> t2.1 Groundwater Elevations <br /> Prior to obtaining depth to groundwater measurements, the wells were checked for the presence <br /> ' of free product using a new disposable bailer for each well Depth to groundwater measurements <br /> were made using a Slope electric water level indicator The depths were measured from the top <br /> of the surveyed well casings Groundwater level data collected from the site to date are presented <br /> in Table 1 <br />