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TABLE 5 Analytical Parameter Summary ARCO Service Station No.5469 130 South Wilson Way, Stockton,California Distance to FerrousTotal Heterotrophic Nitrate Sulfate Sulfite Phosphate Well nearest COD' DO' ORP3 iron° irons plate count 6 TOC' as NO,' as SO4 a :aS S03 9 (Ortho)as P e TDS t Number Date mtCFUhnI m m m in m m NOTES: I COD was analyzed using EPA Method 410.4 Wt.=micrograms per liter QA/QC Review: 2 Dissolved oxygen(DO)was analyzed using EPA Method 360.1 NA=Not analyzed A=Data accepted without qualification 3 Oxidation reduction potential(ORP)was analyzed using ASTM D 1498-76 7 w Data accepted with qualification 4 Ferros iron was analyzed using Hach Method 8146 NS=Not sampled R=Data rejected s Total'iron was analyzed using EPA Method 200.7 NP=Not Purged a Heterotrophic plate count was conducted using SM 9215 B c=Below detection limit for the analytical methods used. 7 Total organic carbon was analyzed using EPA Method 415.1 a Nitrite,nitrate,sulfates and phosphates were analyzed using EPA Method 300.0 9 Sulfite was analyzed using EPA Method 377.1 10 Total alkalinity was analyzed using SM 2320E r t Total solids were analyzed using EPA Method 160.1 [ 11 The sample was analyzed beyond the EPA recommended holding time. f21 The incubation was performed at 35 degrees C for 48 hours with plate count agar [31 The sample was received beyond the EPA recommended holding time. [41 This sample was analyzed beyond the EPA recommend hold time(S his). The sample was kept on ice at 5 degrees C and analyzed within 24 hours of sample collection. [5]This sample was prepared outside the 8 hour recommended holding time for this analysis. [6]Sample result may be biased high. Matric spike and matrix spike duplicate recoveries exceed upper control limits. 171 Sample result may be biased low. Matrix spike duplicate recovery exceeds lower control limit. Matrix spike recovery was within control limits. 181 Reported results may he biased low since the analyses for these analytes were performed beyond the US EPA recommended holding time. [9]The method blank contains this analyte at a concentration above the reporting limit;however,the concentration is less than 5%of the sample result,which is negligible according to method criteria. [101 The repotting limit for this analyte has been raised to account for matrix interference. [l It The concentration indicated for this analyte is an estimated value above the calibration range of the instrument. [12]Confirmatory analysis was past EPA recommended holding time. [13]This sample was originally analyzed within the EPA recommended hold time. Re-analysis for confirmation or dilution was perforated past the recommended hold time. The result from the initial analyses are reported in the Table. [14]Reported results maybe biased high since the analyses for these analytes were performed beyond the US EPA recommended holding time. 151 Reported result should be considered estimated since the analyses were performed beyond the US EPA recommended holding time. 1 161 Reported result may be biased low as indicated by a low average percent matrix spike recovery reported in the associated MS/MSD analysis. 5TRAW6 Arco 5469 0&M_Dats 5of5