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<br /> <br />In the areas where the new French drains will be constructed, the complete lane will need to <br />be re-constructed due to the excavations, The percolation values we found in projects near the area <br />are very low in the range of 10 -5 to 10 -6. Based on these values, this alternative will most likely only <br />provide marginal improvements. The advantage of this alternative is lower cost and it is more easily <br />permitted. <br /> <br />-, <br /> <br />B. Implementation of exfiltration systems in combination with injection wells. In this alternative, the <br />injection well is the disposal system, while the French drains provide water quality treatment prior to <br />injection. This alternative avoids the need for a new outfall, making it the second easiest to permit and <br />implement. <br /> <br />) <br /> <br /> <br />- <br /> <br />Injection Well <br />French Drain <br /> <br />! N <br /> <br />Since the percolation in the area is low, this alternative provides for the use of the wells for additional <br />disposal capacity. Based on the data obtained, we estimate that 2 injection wells will be needed, <br /> <br /> <br />The injection well box has an <br />additional 90 second retention time 'NI A <br />also for additional water quality and 3 J <br />sedimentation, In recent projects, we <br />have noticed the price for these <br />injection wells has lowered due in part <br />to the economic situation, making <br />injection wells a very feasible and also <br />reasonably economic option. <br /> <br />4' <br />I.IIN, <br /> <br />) <br />tjJ <br />I <br /> <br /> <br />C. <br />PIPE <br /> <br />rfilll R .J.Behar <br />~-111 [ <br /> <br />WEIR EL. 0 <br /> <br />2' <br />11 <br /> <br />~~ <br /> <br />R. J. BEHAR & COMPANY, INC. I RFQ No. 11-11-02 I 5 <br />