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First Quarter 1993 Activity Report KOK Realty (Project No W0596 02) Page 2 detailed discussion of the initial subsurface investigation can be found in RESNA's "Interim Problem Assessment Report, Soil and Groundwater Contamination, " dated June 8, 1992 Groundwater samples were collected from each monitoring well subsequent to development and submitted to a state-certified laboratory for analysis of BTEX and TPHG Laboratory results indicated that gasoline constituents were present above laboratory method detection limits in the groundwater samples collected from each site monitoring well Initial groundwater monitoring data (March, 1992) indicated a groundwater flow direction to the south RESNA has been retained by KOK Realty Corp to perform quarterly groundwater monitoring and sampling of the three site monitoring wells This work is being performed at the request of PHS/EHD GROUNDWATER MONITORING AND SAMPLING Groundwater monitoring and sampling of the site monitoring wells was conducted on February 19, 1993 Field work consisted of measuring the depth-to-water in wells MW1, MW2, and MW3, using a electronic water/product interface probe to determine if free product was present, purging and sampling the wells, and subjectively analyzing collected water samples for the presence of petroleum hydrocarbon constituents Static groundwater elevations were measured in each monitoring well on February 19, 1993 Water levels have risen an average of 1 92 feet from the previous quarter A groundwater gradient map is presented on Figure 2 Groundwater monitoring data is summarized in Table 1 Figure 2 depicts a southwesterly groundwater gradient of 0 0055 ft/ft or approximately 29 feet/mile FIuid level measurements indicated groundwater flow direction beneath the site during the first quarter is consistent with the March 1992 southerly flow direction but not with the November or December groundwater flow regime which was in a northerly direction Groundwater gradient at the site will be closely monitored to evaluate significant trends During the February 19, 1993 monitoring, free product was not detected in wells MW I, MW2, or MW3 The probe has an accuracy to the nearest 0 01 foot Groundwater samples were collected from monitoring wells MW l, MW2 and MW3 after stabilization of pH, electrical conductivity (EC), and temperature The monitoring wells were purged and sampled according to RESNA's Quality Assurance/Quality Control Plan on file with the PHS/EHD A total of 44, 15, and 45 gallons of water were removed from wells MW 1, MW2 and MW3, respectively Purge water was contained in labelled DOT approved 55 gallon drums and stored on site • IQMR1993 FNL