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' Blaes Environmental Management Inc U-Haul#709-50 002-70950 04 Groundwater Momtonng Report 5/30/03 The work plan proposed the installation of three new monitoring wells to further evaluate the extent of • hydrocarbons in ' y groundwater to the east, west, and south of the site ' Two remedial test wells (one air sparge, and one nested vapor extraction well) were installed near the westernmost former dispenser island Following the installation of the additional wells, remedial feasibility studies were conducted that included a vapor extraction and air sparge test, an aquifer pump test, and a biofeasibility analysis of the soil and groundwater The results of the remedial feasibility studies are to be presented in a separate remedial test report 14 PROGRAM OBJECTIVES 1 The objective of the quarterly groundwater monitoring program is to provide additional monitoring data to further evaluate groundwater conditions beneath the site 1 5 SCOPE OF WORK The current quarterly monitoring event was conducted in March 2003 The monitoring event involved the following tasks 1) collecting field measurements of groundwater conditions from all of the well casings in each of the well locations, 2) purging monitoring wells prior to collecting groundwater samples, 3) storing and profiling purged groundwater for disposal/treatment, 4) analyzing groundwater samples, and 5)the preparation of this report ' 16 PROJECT TEAM The project team consisted of Blaes Environmental of Phoenix, Arizona, and Del Mar Analytical, Inc (Del Mar), a California State certified analytical laboratory located in Irvine, California Blaes Environmental coordinated and managed the project, performed field measurements, collected, sealed and arranged for proper transport of the groundwater samples to the analytical laboratory, and prepared i ' this report Del Mar provided sample containers and laboratory analysis of groundwater samples collected at the site I 2