Laserfiche WebLink
1� <br /> ' 4.2.2.4 Total Petroleun2 Hydrocarbons <br /> Each of the four recon-laissance groundwater samples was analyzed for <br /> ' ] TPH in the purgeable range. Two of the four reconnaissance groundwater <br /> samples SB-5 and SB-6 were analyzed for TPH in the extractable range. <br /> Temporary wells SB-4 and SB-7 did not yield enough water to collect <br /> 1 recomlaissance groundwater samples to be analyzed for TPH u1 the <br /> extractable range. No TPH in the purgeable or extractable range was <br /> 1 1 detected in the reconnaissance groundwater samples. <br /> 4.2.2.5 Inorganics <br /> Each of the four reconnaissance groundwater samples was analyzed for <br /> chloride, nitrate, sulfate, ammonia as nitrogen, and perchlorate. With the <br /> exception of perchlorate,each of these general chemicals was detected in <br /> the recomlaissance groundwater samples. The laboratory reporting limit <br /> for perchlorate was elevated because of matrix interference in the sample <br /> ' and no detections of perchlorate were reported. A PMCL or SMCL has <br /> been established for these chemicals and the following table presents the <br /> range of inorganic chemicals detected at each temporary well location. <br /> Ammonia as nitrogen does not have an established PMCL/SMCL. <br /> ' Constituent Units Low Concentration High Concentration <br /> Detected Detected <br /> Chloride* mg/L 73.3 (SB-7) 1,520 (SB-6) <br /> 1 Nitrate mg/L 37.1 (SB-7) 318 (SB-6) <br /> Sulfate* mg/L 327 (SB-4) 6,280 (SB-6) <br /> AnnnoniaasNitrogen mg/L 4.7 (SB-7) 3,730 (SB-6) <br /> 1 *- Denotes National Secondary Drinking Water Standard,which are non-enforceable. <br /> 1 Each of the four reconnaissance groundwater samples was collected for <br /> pH analysis. The groundwater pH in three of the reconnaissance <br /> groundwater samples was below the average range of 6.5 to 8.5 (SB-4,SB- <br /> 5, and SB-7). <br /> 1 ERM 12 LESCO/0024301-3/3/2005 <br /> J <br /> IJ <br />