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F ERM-West,Inc <br /> June 15, 1995 <br /> 455 Capitol Mall <br /> Suite 800 <br /> Sacramento,CA 95814 <br /> (916)444-9378 <br /> S Mr Steve Sasson (916)444-5313(Fax) <br /> Environmental Health Specialist INC, <br /> ��Public Health Services ,r <br /> San Joaqum County <br /> P o sox 2009 JUN 19 1995 <br /> 445 N San Joaquin <br /> Stockton, CA 95201 ENVIRONMENTAL <br /> E <br /> PERMIT/SERV,C�SLTM <br /> Subject Groundwater Monitoring at the <br /> Safeway Meat Processing Plant, <br /> 1111 Navy Drive , Stockton, California IERM <br /> Dear Mr Sasson <br /> This letter transmits the results of groundwater sampling conducted <br /> by ERM-West, Inc (ERM) in March 1995 at the Safeway site in Stockton In addition, <br /> groundwater flow direction is discussed an light of a correction to a surveyed well <br /> head elevation at MW-6 The current site status is also briefly discussed <br /> March 1995 GroundwaterMoni ng, <br /> Groundwater samples collected in March were analyzed for total petroleum <br /> hydrocarbons (TPH) as diesel by EPA Method 8015 (modified) and for polynuclear <br /> aromatic hydrocarbons (PNAs) by EPA Method 8310 PNAs were collected in <br /> • anticipation of performing a risk assessment in order to obtain site closure A <br /> coliform sample was also collected from MW-6 as requested by Public Health Services, <br /> San Joaquin County (the County) <br /> A four inch diameter baler was decontaminated prior to purging each well by washing <br /> the bailer in a Liquinox solution and rinsing with clean water, followed by a deiorized <br /> water rinse Each monitoring well was purged by removing a minimum of three well <br /> casing volumes of water and until consecutive conductivity, pH, and temperature <br /> measurements varied by less than 10% Samples were collected with a clean disposable <br /> bailer Field notes, which include depth to water measurements, temperature, <br /> conductivity and pH information, are included as Attachment 1 to this letter <br /> Analyses of samples collected in March 1995 showed detections of fuel in the diesel <br /> range at very low levels, consistent with previous data collected since 1991 PNAs <br /> were not detected in wells MW-4 and MW-5 PNAs were detected in groundwater <br /> collected from MW-6 Phenanthrene (0 95 ug/L), Anthracene (7 7 ug/L) and Pyrene <br /> (0 038 ug/L) Figure 1 illustrates the hydrocarbon concentration at each monitoring <br /> well TPH and coliform results of the sampling are summarized in Table 1 <br /> Table 1 <br /> March 1995 Groundwater Analytical Results <br /> EEmp TPH Total Coliform <br /> 250 Rg/1 N/A <br /> 740µg/l N/A <br /> 770 /1 5 0 CFU/100mi <br /> 11 <br /> A member of the Environmental <br /> Resources Management Group <br />