12.13.23 BOA Agenda Packet - Laserfiche WebLink

Browse Search

24 1 Beth Bronson:We need to finish the motion to deny. 2 3 Cy Stober: Mr. Chair,we had a vote. 4 5 Beth Bronson:We did? 6 7 Cy Stober: Yes,we did. 8 9 Leon Meyers:All right. Evan Winmore. Is Evan Winmore in the room? All right. That ends the list of folks who signed up 10 to speak on the 18th. And next we'll go back to the applicant's presentation. We are 2 hours in. How about if we take just 11 a 5-minute break. Reconvene at 9:05. 12 13 BOARD OF ADJUSTMENT BREAKS UNTIL 9:05 14 15 Leon Meyers: Mr. Byker, before you resume, I'll just remind you that the Board's policy says the meeting ends at 10:00 this 16 evening unless the Board chooses to extend beyond that time. 17 18 Patrick Byker:We'll go swiftly as possible. We're anticipating about 15 minutes. Our next witness will be Eric Lappala who 19 is a well hydrology expert. 20 21 Eric Lappala: Thank you. Good evening, Board. He's given me special permission because I have to drive home to 22 Southport tonight. My name's Eric Lappala. I'm not with Eagle Water Company. That's one of my other companies. I'm 23 with Eagle Resources which is my consulting engineering company. My qualifications are included in your packet in Exhibit 24 N, I believe. I'm a licensed professional engineer in North Carolina. I'm a certified hydrogeologist with the American 25 Institute of Hydrology. I'm a registered site manager with the North Carolina Department of Environmental Quality. 1 26 founded my company, Eagle Resources, in 2001 after 14 years as a hydrologist with the US Geological Survey working all 27 over the United States and 19 years as the principal hydrogeologist with an international environmental consulting and 28 environmental cleanup company. My experience and expertise are in the assessment and modeling of hydrogeologic 29 conditions and water supplies including water well supplies. And my role on the team is I'm the groundwater consultant 30 that's been asked to render my opinion on the water supply wells that are proposed for the project. I based this review, in 31 addition to my professional experience, on other hydrogeologic studies that I've performed in the last 15 years in the 32 Orange and Chatham County area including Briar Chapel in Chatham County. In addition, I relied on a published report by 33 the U. S. Geological Survey that was performed in conjunction with the county that evaluated about 649 water wells in the 34 county in terms of how deep they were,what their yields were,what their water quality was and so forth. And based upon 35 that study and my assessment of the geologic conditions here, the wells in this area can be completed to provide an 36 adequate water supply for the project. And their depths are probably going to have to be anywhere between 150 to 250 37 feet. There do not appear to be any groundwater quality issues due to the quality of the groundwater at this particular site. 38 In addition, one of the other things I do is I do three initial computer modeling of groundwater systems to evaluate the effect 39 of wells on adjacent properties or wells effect on each other. And so I put one of these together again using information 40 from previous studies I've done in the area and evaluated a couple of hypothetical locations for the wells that are proposed 41 for the site. It's from my understanding that from reviewing the site plan that one well could provide the water supply that's 42 necessary for the project. However, two would probably be better because they would not interfere with each other, and 43 the drawdowns in each of them would be minimized, and any potential draw down at the property boundary would also be 44 minimized. So to evaluate the amount of effect these wells would have on any adjacent properties,we have to figure out 45 how much they're going to pump. And so to come up with that we said you use the requirement for permitting the septic 46 system on the site which is the water use for****septic systems for this kind of a facility are based on 10 gallons per day 47 per parking space. So if we take the number of parking spaces on the plan and multiply it by 10 gallons per day,we ended 48 up with about 7,000 gallons a day that would be needed, excuse me, about 3,000 gallons, I'm sorry, did the math wrong 49 there. If this property were developed with single-family homes without a special-use permit being granted, more water 50 would be required, approximately 5 to 6,000 gallons a day. That's based upon the current state requirements you have to 51 account for 74 gallons per bedroom per property. Assuming three-bedroom homes on the whole thing would be developed, 52 so that would be about 5 to 6,000 gallons that would be required if the site were developed with homes as opposed to this 53 facility. So by looking at the amount of water that would be pumped to provide the water for this project, in my computer 54 model I made an assessment that the impact at the property boundary of water levels due to these pumping, the maximum 55 would be somewhere in the order of a half to an inch. So unless any adjacent water wells on adjacent properties were at