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TABLE 4 <br /> SUMMARY OF GROUNDWATER ANALYTICAL RESULTS(PAHs)' <br /> FORMER VERNALIS PUMP STATION <br /> Vernalis,San Joaquin and Stanislaus Counties,California <br /> Concentrations reported in pg/L <br /> 1 O a+ O cC M O <br /> Collection " <br /> A °' c <br /> N <br /> Method/ c, a <br /> Depth Date <br /> Sample ID (feet b s) Collected o o o " a <br /> a <br /> MW-5 ggw 01/29/08 <0.010 <0.010 <0.010 <0.010 <0.0050 <0.010 <0.010 <0.010 <0.010 <0.0050 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <br /> (cont.) --- 07/17/085 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS <br /> Number of Samples: 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 <br /> No.of Detections: 4 2 0 1 0 3 0 1 0 1 3 1 0 7 1 7 0 20 14 1 6 <br /> Max.Detect(mg/kg): 0.200 0.033 --- 0.039 --- 1 0.039 --- --- 0.10 --- 1 0.30 0.90 --- 1 0.9 1.3 0.1 <br /> Max.Nondetect(mg/kg): <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <br /> Abbreviations: Notes: <br /> bgs=Below ground surface(if applicable) 1. Results above detection limits are in bold. <br /> D=Duplicate sample 2. Samples collected by Gcomatrix were analyzed by Friedman&Bruya for PAHs using EPA Method 8270 SIM. <br /> EPA=United States Environmental Protection Agency 3. Samples were collected by SAIC and analyzed by Lancaster for PAHs using EPA Method 8270C with SIM. <br /> Geomatrix=Geomatric Consultants,Inc. 4. Not sampled due to the presence of SPO. <br /> ggw=Grab groundwater 5. No longer required to sample PAHs <br /> ID=Identification 6. There was insufficient volume of water in the well for sample collection. <br /> Lancaster=Lancaster Laboratories,Inc. 7. Not monitored on a quarterly basis per Central Valley RWQCB. <br /> µg/L=micrograms per liter 8. Well damaged;not monitored/sampled. <br /> NA=Not analyzed 9. Well not accessible. <br /> NS=Not sampled <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> Radian=Radian International,LLC <br /> RWQCB=Regional Water Quality Control Board <br /> SAIC=Science Applications International Corporation <br /> SIM=Selective ion monitoring <br /> SPO=Separate-phase oil <br /> ---=Not applicable or not available <br /> <=Denotes analyte not detected at or above the laboratory reporting limit <br /> IIiJ The Benham Companies.LLC <br /> +�rf�`r AWhaly trwnetl iuhsidiary <br /> Page 4 of 4 F scrence ro sorurr�s <br />