ARCHIVED REPORTS XR0012678 - Laserfiche WebLink

Home Browse Search

N.. based upon field evidence of contamination (PIA readings, discol- oration, odors) and site straticgraphic changes. Analysis will be conducted for benzene, toluene, ethylbenzene, xylenes (BTEX) and total petroleum hydrocarbons (TPHG) by EPA methods 8020/8015 by Applied Analytical (DHS ce7t. #1211). Analytical methods, sample containers, holding times, and means of preservation are listed in Appendix I. All drill cuttings will be placed on plastic sheeting, covered with same, and remain on-site pending laboratory results. %,o avoid cross-contamination, drilling augers will be steam-cleaned before drilling each borehole. Water used to clean the augers after drilling each boring will be collected and stored on--site ' in drums approved for hazardous liquid storage tory analysis. q 9 pending labora- tory Subsequent to installation, the wellheads will be surveyed to a Mean Sea Level Datum (MSLD). Depth to water readinss will be used to determine the groundwater flog: direction beneath the project site. Groundwater monitoring will be conducted in ac- cordance with WaterWork's Groundwater Monitoring Protocol (Apper.- dix I). -- After the monitoring wells have been allowed to stabilize for at least 24 hours, they will be monitored for free product in ac- cordance with Waterworks Groundwater Monitoring protocol (Appen- dix I). Water samples will then be collected after purging a minimum of four well volumes (casing and sandpack). The criteria for determining well volumes is included in the Well Development Protocol (Appendix I). Sample collection will be in accordance w with WaterWork's Groundwater Sampling Protocol. (Appendix 1). The water samples will be analyzed for BTEX and TPHG by EPA methods 8020/8015 at Applied Analytical. Laboratory Methods, sample containers, holding times and means of preservation are summa- rized in Appendix I. All site activities involving potential contact with hazardous materials (i.e. gasoline contaminated soils) will be conducted in accordance with Waterwork's Health and Safety Plan (Appendix ii). 3.2 Vapor Extraction mast A vapor extraction test (VET) will be conducted utilizing the three vadose weli.s. The test will. entail: 1) transporting a portable vapor extraction system to the site; 2) operating the vapor extraction equipment as required to obtain vapor samples, vacuum pressure and flow rate information; 3) collecting vapor samples using tedlar bags at the outlet of the vapor extraction test system, and submitting these vapor samples to a laboratory -- for analysis, following chain--of-custody-protocol.___throughout-------- ' --------- - - -------- • laboratory.procedux es. 5