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f <br /> t <br /> t�W�1�11�v <br /> t <br /> Mr. Hal Miller JON 1 9 1989 <br /> (Wµ' June 8, 1989 <br /> Page 2 <br /> r�!iH <br /> Following installation of the monitoring wells, free product was <br /> measured in monitoring wells MW--1 and MW-4. Upon detection, <br /> product bailing on a regular schedule was conducted until a <br /> pumping system could be installed. In July, an interim double-- <br /> pump system was installed ir• Mw-4 to give preliminary hydraulic <br /> control on the free product, and to pump it from the subsurface. <br /> In an attempt to obtain increased control on the free product and <br /> dissolved plumes beneath the site, three additional recovery <br /> wells were installed between October and November. A deeper, <br /> larger diameter recovery well (PW-3) was installed on site to <br /> r monitoring well MW-4, <br /> replace the small diametewhich was being <br /> used as an interim, on-site, recovery well. A small diameter <br /> recovery well (PW-1) was also installed on the periphery of the <br /> �..- site between MW-9 and the domestic well at 9135 Connie Avenue. <br /> Recovery well PW-1 was installed to prevent the migration of <br /> dissolved hydrocarbons to domestic well 9135. Another small <br /> diameter recovery well PW--2, was installed down gradient and off- <br /> site between domestic well 8968 and previously installed MW-8. <br /> This pumping well was installed in the event that it would be <br /> needed to prevent the migration of dissolved hydrocarbons to <br /> domestic well 8968. PW-2 has never been used as a pumping well. <br /> Additionally, during October-November, three monitoring wells <br /> were installed (MW-10 through MW-12) off-site to obtain further <br /> dissolved plume definition. Underground piping was installed to <br /> MW-12 allowing its use as a pumping well to intercept dissolved <br /> hydrocarbons that might impact the Tomato Growers Association <br /> domestic well. <br /> GROCNpN:ATER <br /> TECHNOLOGY,INC. <br />