WORK PLANS FILE 2 - Laserfiche WebLink

Home Browse Search

Geological Technics Ina 1172 Kansas Avenue t Modesto,California 95351 (209)522-4119/Fax(209)522-4227 www.gtienv.com ' Phase I Remedial Action Implementation Plan George's Service 1600 Durham Ferry Road Tracy, California ' Project No. 425.2 September 13, 2011 ' Plan Outline 1 Phase I• ' • Complete Permitting for Waste Discharge Requirements through the Regional Water ar Quality Control Board-work in progress • Perform Groundwater Monitoring on an annual basis during the 2nd Quarter of each of ' year, in the following wells: SW-101 and MW-7.-i2-jy_& At - Ste,( 7'-u'lisS • Measure DTW during the annu� Groundwater Monitoring Event in the following t)t wells: MW-5 and MW-8. '. 0 ,A k,i\�- q ..r 32,5�37, S ' b6r� ' • Assemble the following equipment for the air sparging system (Air compressor, controller, manifold, piping, fittings, pressure and flow gauges, distribution valves, a1c ' temporary fencing, electrical, air sparge timer). • During this initial phase, we propose to inject air into the following existing wells: OS-1, OS-2, and possibly MW-2. ' • Operate the air sparge system in bio-mode to help prevent degassing of the adsorbed and/or dissolved hydrocarbons into the vadose zone. To accomplish this, we propose to operate the system as follows: sparge for 15 min. in OS-1, followed by 15 min. in t OS-2, then system off for 30 min. and then repeat the cycle. W\` • Monitoring schedules is as follows: o Groundwater Monitoring for Metals - Monitor wells (OW-2, MW-2 and MW- ' 106) for Arsenic and Hexavalent Chromium prior to air spargin1§ operations (October 2011), monitor the same three wells for metals in the 2' Quarter of S 2012 (March 2012) and finally monitor the same three wells for metals in the 4t1, ' Quarter 2012 (November 2012). o Performance Monitoring - Measure DO levels in wells (OW-2, MW-2 and MW- 106) on a monthly basis. 1