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3. MONITORING AND SAMPLING AND ANALYSIS PLANS During the field pilot test, both monitoring data (field data) and samples for laboratory analysis will be collected Groundwater samples will be collected periodically to assess the effect that chemical oxidation is having on groundwater quality and hydrocarbon impacted groundwater Soil vapor samples will be collected from soil vapor extraction wells to assess the extent to which hydrocarbons are volatilized, and for oxygen and ozone content Additionally, ambient air ' will be monitored to assess if any hydrocarbons or ozone are impacting ambient air The monitoring and sampling and analysis plans for groundwater, soil vapor, and ambient air are presented below The location of all wells and ambient air sampling stations are identified on ' Figure 2 Well construction details are included in Table 1 Sampling and Analysis Plan Groundwater and soil vapor samples will be collected during the pilot test Groundwater samples will be collected prior to the pilot test and after 1 week of operation These results will be compared with analytical data collected during the laboratory benchscale test to assess the validity of benchscale testing results (i e , no adverse impacts to groundwater quality) The wells selected for sampling are located crossgradient and within the source area, as well as upgradient and downgradient of the source area, and at appropriate depths Additionally, the infection point pairs, IPIA and IPIB, IP2A and IP2B, and IP3A and IP3B, will also be used as groundwater . monitoring points Figure 2 shows the location of the injection and monitoring wells As some hydrocarbons may be volatilized, the soil vapor extraction system will be operated to abate hydrocarbons or ozone in the vadose zone during the pilot test The tables below present the sampling and analysis plan for groundwater and soil vapor for laboratory analysis (Table A), and the types of field data that will be collected (Table B) ITable A- Laboratory Groundwater and Soil Vapor Sampling Plan Sample Media Wells/Sampling Analyte Analysis Sampling Frequency and Notes Points Method Groundwater As presented in Table 2 As presented in As presented Pre-pilot test,at the end of the Table 2 in Table 2 first week of infection, and every other week thereafter(pending favorable results from the first week of sampling), and at Ieast 1 month after the end of the pilot test Soil vapor MW2,MW3, MW6 TPH-g, BTEX, EPA 8260 Pre-pilot test,at the end of the (and RW 1 and MW5 if MTBE first week of injection, and warranted) monthly thereafter(pending favorable results from the first week of sampling), and at least I month after the end of the pilot test G 1Pro)ccts173942VAASTER\WP\WP07051Ozonc Infection Pilot Tat Work Plan doc