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TABLES Analytical Parameter Summary ARCO Service Station No 5469 130 South Wilson Way,Stockton,California Distance to Ferrous Total Heterotrophic Nitrate Sulfate Sulfite Phosphate Well nearest COD I DO 2 ORP3 iron 4 iron 5 plate count 6 TOC 7 as NO,' as SO4 a as SO,' (Ortho)as P e TDS Number Date injection well m m m m CPU/ml m m m m m m NOTES COD was analyzed using EPA Method 410 4 µgR.=micrograms per liter QA/QC Review Z Dissolved oxygen(DO)was analyzed using EPA Method 360 1 NA=Not analyzed A Data accrptcd without qualification 'Oxidation reduction potential(ORP)was analyzed using ASTM D1498 76 I=Data accepted with qualification °Ferms iron was analyzed using Hach Method 8146 NS—Not sampled R=Data rejected 5 Total iron was analyzed using EPA Method 200 7 NP T Not Purged 6 Heterutrophic plate count was conducted using SM 9215 B <—Below detection liimt 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 t 10 Total alkalinity was analyzed using SM 2320E Total solids were analyzed using EPA Method 160 t ]1]The sample was analyzed beyond the EPA recommended holding time f2]The incubation was performed at 35 degrees C for 48 hours with plate count agar ]3]The sample was received beyond the EPA recommended holding time 141 This sample was analyzed beyond the EPA recommend hold time(8 firs) The sample was kept on ice at 5 degrees C and analyzed within 24 hours of sample collection 151 This sample was prepared outside the 8 hour recommended holding time for this analysts 16]Sample result may be biased high Matric spike and matrix spike duplicate recoveries exceed upper control limits ]7]Sample result maybe biased low Matnx spike duplicate recovery exceeds lower control limit Matrix spike recovery was within control limits [8]Reported results may be biased low since the analyses for these analytes were perfomied 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 [10]The reporting limit for this analyte has been raised to account for matrix interference [111 The concentration indicated for this analyte is an estimated value above the calibration range of the instrument [12]Confirmatory analysts was past EPA recommended holding time 1[131 This sample was originally analyzed within the EPA recommended hold time Re-analysis for confirmation or dilutton was performed past the recommended hold time The result from the initial analyses are reported in the Table 1141 Repotted results may be 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 116]Reported result may be biased low as indicated by a low average percent matrix spike recovery reported in the associated MSIMSD analysis [17]The reported result may be eshmaled since the analyses for these analytes were performed beyond the USEPA recommended holding time [18)The reported result may be biased since the analyses for these analytes were performed beyond the US EPA recommended holding time [19]The reported result should he considered estimated due to a high relative percent dtfference reported between the primary and laboratory duplicate samples 120]Analyte present to the method blank STRATUS Arco-5469-0&M_Data 6of6