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TABLE 5 Analytical Parameter Summary ARCO Service Station No 5469 130 South Wilson Way,Stockton,California Distance to Ferrous Total Heterotrophic Nitrate Sulfate SulEte Phosphate Well nearest COD l DO z Ow iron° irons plate count 6 TOC' as NO3 s as SO4 a as S03 9 (Ortho)as P a l pg t l Number Date linjectionwelli m m in m CFUImI rnwL m m niEj 1119/1, m NOTES I COD was analyzed using EPA Method 410 4 WL=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 I Oxidation reduction potential(ORP)was analyzed using ASTM D1498 76 J=Data accepted with qualification °Feros tron was analyzed using Hach Method 8146 N$=Not sampled R=Data[elected 5 Total von was analyzed using EPA Method 200 7 NP=Not Purged 6 Heterotrophic plate count was conducted using SM 9215 B <=Below detection linut for the analytical methods used 7 Total organic carbon was analyzed using EPA Method 415 I 6 Nitrate nitrate sulfates and phosphates were amalyZed using EPA Method 300 0 9 Sulfite was analyzed using EPA Method 377 l is Total alkalmiry was analyzed using SM 2324E i i Total solids were analyzed using EPA Method 160 l [Il The sample was analyzed beyond the EPA recommended holding time 12]The incubation was performed at 35 degrees C for 48 hours with plate count agar 13]The sample was received beyond the EPA recommended holding time [4]This sample was analyzed beyond the EPA recommend hold time(9 his) The sample was kept on ice at 5 degrees C and analyzed within 24 hours o£sample collection [51 This sample was prepared outside the 8 hour recommended holding time for ties analysts [6]Sample result maybe biased high Mamc spike and matrix spike duplicate recoveries exceed upper control]antes [7]Sample result maybe biased low Matrix spite duplicate recovery exceeds lower control limit Matrix spike recovery was within control limits [81 Reported results may be 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 110]The reporting limit for this analyte has been raised to account for matrix interference I i I]The concentration indicated for this analyte is an estimated value above the calibration range of the instrument 1121 Confirmatory analysis was past EPA recommended holding time [131 This sample was originally analyzed within the EPA recommended hold time Re-analysts for confirmation or dilution was performed past the recommended hold time The result from the initial analyses are reported in the Table [141 Reported results may be biased high since the analyses for these analytes were performed beyond the US EPA recommended holding time [15)Reported result should be considered estimated since the analyses were performed beyond the US EPA recommended holding time [ 16]Repotted result may be biased low as indicated by a low average percent matrix spike recovery reported in the associated MS/MSD analysis. [171 The reported result may be estimated since the analyses for these analytes were performed beyond the US£PA recommended holding time [18]The repotted result may be biased since the analyses for these analytes were performed beyond the US EPA recommended holding time 119]The reported result should be considered estimated due to a high relative percent difference reported between the primary and laboratory duplicate samples 5TKA7U5 Ano-5469-0&M_Data 5 of