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Waste Management Unit Report -6- 10 September 1991 <br /> DDRW, Tracy <br /> not recommended for the Embalming Fluid Dump (WMU 12) . Both of these WMUs <br /> do not have the lateral boundaries clearly defined. The Report should <br /> have provided more justification as to why trenching is an appropriate <br /> alternative method of investigation for a particular WMU. <br /> Page 4-21. Five soil borings are to be installed in the Embalming Fluid Dump (WMU <br /> 12) . This WMU is approximately 80 feet by 50 feet, as depicted on Figure <br /> 4-8. Five soil borings appears to be too many borings for a WMU of this <br /> size. Two or three soil boring should be adequate to investigate the <br /> soils in this WMU. <br /> Page 4-25. The Report recommends that analyses for priority pollutant metals and <br /> TDS/pH be performed on soil and ground water samples from the Pesticide <br /> Waste Disposal Trench (k' lU 15) . Most pesticides are organic compounds arid <br /> do not contain metals. Therefore, it is not necessary to analyze the soil <br /> and ground water samples for metals in the area of the Pesticide Waste <br /> Disposal Trench. <br /> Page 4-33. One of the parameters to be analyzed for in the ground water samples from <br /> LM-25 for the Building 26 Recoup Operation (WMU 23) is ethylene glycol . <br /> The High Performance Liquid Chromatograph (HPLC) Method should be used to <br /> detect the presence of ethylene glycol . <br /> Page 4-34. The Report recommends that two monitor wells be installed for the <br /> investigation of the Building 247 Petroleum Laboratory UGT (WMU 24) . One <br /> monitor well is to be installed in the area of the former UGT and the <br /> second is to be installed adjacent to the area of the former UGT. A <br /> second monitor well will not be necessary if there is no ground water <br /> contamination in the well to be installed in the area of the former UGT. <br /> In addition, if a second monitor well is needed, the well should be moved <br /> farther down gradient than depicted on Figure 4-15 to optimize plume <br /> definition. <br /> Page 4-35. The Report does not include 0&G as parameters for analysis of the soil and <br /> ground water samples for the investigation of the Building 247 Petroleum <br /> Laboratory UGT. Because petroleum hydrocarbons were handled at this WMU, <br /> O&G should be added to the list of analytes. <br /> Table 4-1 . Table 4-1 is a summary of the evaluation and recommendations for each WMU. <br /> This table is extremely useful and we commended WWC for the preparation of <br /> this table. <br /> CKW:cw <br />