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� -r 1 6.0 STAFF COMMENT — PUBLIC WORKS ENGINEERING: 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 6.1 On October 23, 2007, the Public Works, Environment, and Transportation Commission met to review the Har Mar Proposal. The following are their suggested conditions of approval: a. Staff should review whether there are domestic water supply wells within one quarter mile of the infiltration basins to determine if there are potential contamination concerns and require monitoring wells if water supply wells exist. b. c. !� Staff should review the soil boring information for determination of soil suitability for infiltration of storm water. The applicant's traffic study should be revised per the recommendations of the city's reviewing consultant dated October 23, 2007. The applicant should develop a pedestrian and bicycle access plan. e. The applicant's traffic consultant should determine if there are ways to mitigate traffic flow toward the Snelling Avenue and County Road B intersection. This intersection is near a failing LOS. 6.2 Staff has completed additional review on condition 6.1 a. to better understand the existing regulations regarding domestic water supplies. As a part of the applicant's storm water management plan, they are required to construct infiltration areas. Underground infiltration galleries are considered Class V injection wells. As such, the owner is required to register these wells with the US Environmental Protection Agency. They are also required to comply with Federal underground injection control program regulations. These regulations require the owner to construct and operate the well in a manner that does not endanger underground sources of drinking water. 6.3 There are 6 residential domestic wells located between 1,000 and 1,350 feet away from these infiltration basins. Residential wells are regulated by the Minnesota Department of Health. 6.4 Staff feels that requiring the applicant to install monitoring wells implies that the City will monitor these infiltration areas. Since wells are regulated by state and federal agencies, the City does not regulate wells. As a result, staff does not believe that this should be added as a condition of approval. We will make the applicant aware of the well requirements as a part of our review process and allow the appropriate state and federal agencies to enforce their regulations. 6.5 Condition 6.1 c. was addressed by the applicant in late October. The City's Traffic Engineer, SRF, has reviewed the revised Har Mar Trafiic Study, and found that his comments regarding this application have been addressed. There is no longer a need to include this as a condition of approval. PF07-053_RCA_012808.doc Page 4 of 13