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3.0 1FlIN DM'gGS 3 1 DOMESTIC WELL RESEARCH There are two domestic water Supply wells at the site and designated as "Small Well" and "Large Well" on Figure 2 ESE contacted the California Department of Water Resources (DWR) and requested information concerning the onsite water supply wells The DWR had a record of only one well at the site drilled in 1954 This well is designated as "Large Well" Well construction information shows the well casing is 10 inches in diameter unperforated to 120 feet depth below ground surface (bgs) From 120 to 129 feet, the well is uncased No records are available for a second well, delineated as "Small Well" on Figure 2 DeJesus Well and Pump was contracted by Mr Cecclum, site owner, to replace the small well pump due to pump failure During pump replacement, the well was shut down, which provided the opportunity to investigate the well using a downhole video camera This work was performed on March 10, 1994 ESE was present during the video work and made the following observations " 6-inch diameter steel casing from round surface to a The Small Well is cased vvrtli 6 c dam g g depth of 67 feet bgs From 67 to 149 feet bgs the well is cased with 4-inch diameter steel casing The downhole video showed a large amount of scaling on the casing throughout No perforation were observed in the casing and it is likely that if any arc present, they are almost completely plugged The casing ends at a depth of 149 feet bgs The well is open below 149 feet to a depth of 150 feet bgs DeJesus Well and Pump believes that the majority of the water is likely from this interval Water level measurement ports were installed on both the "Small" and "Large Well" at the site A flowmeter was installed on the "Small Well" discharge line The relative elevations of each F 16925400Ugm94 rpt 3 Ewirunmenlarl&zeme&Engmeermg,Inc