WORK PLANS - Laserfiche WebLink

Home Browse Search

29 January 2002 ' AGE-NC Project No, 98-0466 Page 8 of 25 ' The metals lead, zinc and chromium were reported to be within bac ound concentrations, but formaldehyde was detected at concentrations of 26 mg/kg and 43 mg1g. Kleinfelder believed the formaldehyde results to be false positives. AGE does not have a copy c f the assessment report. ' In the AGE-prepared Phase II Site Assessment Report- Septic Leach Kelds and Drainage Ditch, ' dated 26 October 2000, AGE reported the analytical results from soil and ground water samples collected from the septic tank leach field west of the Millworks buil ' g. One grab ground water sample was collected at a depth of approximately 40 feet bsg (LP4). TRPH was detected at a concentration of 15 milligrams per liter (mg/1). Total chromium was de ected at a concentration of 1.17 mg/l. The sample was not analyzed for dissolved chromium Lead was detected in the ground water sample at 0.10 mg/1. The sample was not filtered prior to analysis, io the metals results include, ' total metals from entrained mineral grains and are not representative of dissolved metals concentrations. ' Neither PCP nor TCP were detected in the groundwater sample. Zinc concentrations in the ground water sample did not exceed environmental guidelines. Formaldehy at 4.7 mg/l exceeded the Action Level of 0.1 mg/1 in the ground water sample. Table 7 and E shows the analytical data obtained from the October 2000 samples, Figure 4 shows the sample localities. ' 2.3.3. Maintenance Building Septic Leach Field-Active On 05 December 2000, AGE collected soil and grab ground water samples from the septic leach ' field east of the active maintenance building located on the northern portion of the property. Analyzed samples did not contain detectable concentrations of TRPH, formaldehyde, TCP, TCE or PCP. Concentrations of metals, including chromium, lead and zinc were all within background ' values for soil samples. Concentrations of metals in ground water sam les were above MCLS and PRGs for tap water for each metal analyte;however,the groundwater samples were not filtered prior to analysis, so the metals results include total metals from entrained mineral grains and are not representative of dissolved metals concentrations. Tables 7 and 8 show the analytical data obtained from the December 2000 samples. AGE believes the area to have been misidentified as a potential ' receptor of contaminants (See Site Environmental History, dated 04 May2001, discussion of septic tanks) and that the area has been adequately assessed. ' 2.4. WASH-DOWN AREAS According to Kleinfelder (1992), rinse water generated during cleaning of glue application equipment, priming equipment and saw blades was discharged onto surface soils at five separate locations at the site. The areas considered by Kleinfelder (1987), baied on the D&M Phase II ' Investigation (1987) report, as having potential contamination were located east of the Ray Bond Advanced GeeBnvlron tal,Inc.