ARCHIVED REPORTS_XR0008191 - Laserfiche WebLink

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1 gofive drums contain wastewater The wastewater will be disposed and documented in ' accordance with applicable regulations 3.2 Sampling Methods And Procedures ' 3.2.1 Soil Sampling Procedures A total of four soil samples were collected from the drive samples during well installation, and analyzed for TPH-D Samples from each well were collected at two discrete vertical locations (Table 3), with the primary objective of determining soil cuttings disposal options The TPH-D soil data has also been used to assessing variations in vertical TPH-D concentrations Soil samples at DMW-6 were collected at depths of 25 and 40 feet bgs, which corresponds to depths of 14 feet above groundwater and 1 foot below groundwater Soil samples at DMW-7 were collected at depths of 30 and 35 feet bgs, which correspond to depths of 9 and 4 feet above groundwater Soil samples were placed in stainless steel ' rings, capped with teflon seals, and stored in an ice box until delivery to the laboratory within 48 hours of sampling Samples were analyzed for TPH-D according to EPA method ' 8015M Analyses were performed by Quanterra Laboratories in Sacramento, California Copies of the laboratory reports are attached in Appendix D 3 2.2 Groundwater Sampling Procedures Groundwater samples were collected by Dames & Moore on December 21, 1998 Prior to ' sampling, the static water level was measured at wells DMW-6 and DMW-7 using an electric water level indicator An additional set of water level measurements for all seven wells was collected on January 21, 1999 Only monitoring wells DMW-6 and DMW-7 were sampled, in accordance with the Work Plan (Dames & Moore, 1998a) The sampled monitoring wells were purged with a disposable bailer The wells were purged until a ' minimum of three casing volumes were removed from the well, and until the field-measured temperature, pH, and specific conductivity stabilized Purged groundwater was stored in labeled steel drums Field parameters were recorded on a Field Record of Water Sample form for each well, which are included in Appendix E Copies of the laboratory reports and the chain-of-custody for the samples are included with Appendix D Water samples were collected from monitoring wells using disposable polyethylene bailers A new bailer was used at each well One duplicate groundwater sample (MW-0) was collected at DMW-7 The duplicate sample was collected in the same manner as the primary sample, following collection of the primary sample DAMES &MOORE 4 R\sac1044misc19902_03 doc