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16 August 2011 AGE-NC Project No. 97-0301 Page 7 of 11 Upon grout completion , a 24-inch , flush mount, traffic rated , steel well box will be installed over the well casings and secured with a bolted , steel well box cover. A reference point will be marked on the top of each well head , and surveyed by a California licensed surveying engineer to the nearest 0 . 01 foot to determine the elevation relative to a surveyed benchmark and to determine GPS coordinates for tracking on the State Water Resources Control Board (SWRCB) GeoTracker database system . 3 .2 . 3. Remediation Well Development Development of the proposed ground water monitoring wells will occur no less than 48-hours following well installation , and consist of a combination of bailing to remove the major portion of fine-grained sediment from inside the well , surging to flush out or draw in sediment from the filter pack and additional ground water evacuation (purging ) to remove fine-grained sediment. Development purging activities will be continued until field parameters (pH , electrical conductivity, and temperature) have stabilized and purged water is visually sediment-free. 3 . 2 . 4 . Remediation Well Sampling One remediation well monitoring event will be performed prior to system startup to establish a baseline concentration value for each well . Ground water sample collection will be performed in accordance with CVRWQCB and SJCEHD guidelines . 3 . 2 .4. 1 . Static Water Level Measurements Before purging and sampling during ground water monitoring events , static water level will be measured using an electric water level indicator. Water level data will be recorded to the nearest 0 .01 foot from a reference point marked of the top of the PVC well casing . Before and after each use ,—the electric oil/waterrlevel indicator will-be washed in-an Alconox solution and rinsed with water. 3 .2 .4 .2 . Well Evacuation Subsequent to measurement of depth to water and prior to sampling , the well will be purged utilizing either a submersible pump , inertia pump or by hand bailing to ensure that the ground water sample is representative of the formation , rather than water standing in the well casing . The well will be purged until : 1 ) a minimum of three casing volumes is removed from the well ; and/or 2) the field-measured ground water parameters pH, Advanced CeoEnvironmen[al, Inc.