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HomeMy WebLinkAboutRESERVE DRAINFIELD - SWG Letters / Memos - 2/21/2023 MAR 0 2 2023 Arrow Septic Designs, Inc �1 t 171 E. Vuecrest Dr. U Union,WA 98592 By February 21,2023 Mason County Department of Health Services 415N6thSt Shelton,WA 98584 RE: Calvary Fellowship(Parcel#42012-12-60040)Flow Calculations&Reserve Drainfield Dear Inspector: The Calvary Fellowship property located at 50 E Island Lake Dr, Shelton, WA 98584 has an existing church. There is a proposed new structure to house the children's and youth ministry. There is no immediate planned change of use or increase in flows,although if the church attendance continues to grow,the septic system has plenty of capacity. There is a gravity flow septic system currently serving the church that was installed in 1983. It consists of (2) 1,200 gallon septic tanks followed by 250 If x 36"wide= 750 s.f. of drainfield. The system was inspected 2-1-23 by Bamford Septic Repair and checked out with no deficiencies noted. The drainfield passed a 20-minute water test at that time. The church was approved in 1983 with a drainfield size of 750 s.f. for a total of 900 GPD(using a 1.2 application rate). See attached flow calculations for the current usage which averages 174 gallons per day using a conservative estimate of 5 gallons per visit per person. Actual water usage(avg approx. 300 cubic feet/month)shows even less average flow than calculated. The plot plan attached shows a designated reserve drainfield area for the future if needed. The area soils are a very gravelly medium sand so we have designated 1,125+s.f. sand-lined pressure bed reserve area(900 gpd avg @ 0.8 ap rate). A"Notice of Operation and Maintenance of On-Site Sewage System"has been notarized and filed on the property deed. A copy is attached. The property owner's contact information is as follows: Calvary Fellowship P.O. Box 432 Shelton, WA 98584 (360)280-8634-Robin Williams If you need further information,please feel free to contact my office at(360) 898-2255. Sincerely, • �tl ffi APPROVED Paula MAR 03 2023 Lice On '5100349 ;�� aster"'vr Treatment System Designer MASON COUNTY ENVIRONMENTAL HEALTH ~' ` `r�• RET PAULA JOY JOHNSON**. • tCit6tS>r'riCSi aa' w%% Calvary Fellowship Arrow Septic Designs, Inc Parcel#42012-12-60040 2/21/2023 50 E Island Lake Dr Shelton,WA 98584 Number of Duration Gallons Total Gallons Average Usage: Attendees (Hours) per person per Week Sunday-Early Service 50 1.5 5 250 Sunday-Late Service 100 2.0 5 500 Sunday-Children 30 2.0 5 150 Sunday-Youth Group 12 2.0 5 60 Wednesday-Bible Study 40 2.0 5 200 Total Average Flow per Week 1160 Average Flow per Day 166 Existing Septic Tank Size: 1,200 Gallon Tanks x 2 each = 2,400 gallons Using 2.2 days retention time (2,400/2.2 days) 1,091 GPD Existing Drainfield Size: 250 lineal feet x 3 ft wide= 750 s.f. Original Design Flow Capacity(using 1.2 ap rate) 900 GPD Reserve Area DF Sizing(using 0.8 application rate) 1,125 s.f. Use 9'wide beds 125 I.f. RESERVE AREA: Use(2)9'wide x 65' long reserve drainfield beds=1,170 s.f. Al APPROVED /6-..:_ • MAR 0 3 2023 s 1 �'' MASON COUNTY ENVIRONMENTAL HEALTH 5100349 Q'Z PAULA JOY JOHNSON . •"t RET uccs>rr�'us�cNa_ +� LOuJ t� ,A,,.. .,L_o T N (I34'x gt,' E;34 r t z� ICAL VAP \) FELLowsH-t1P `�� c GN U►� Gl-� 5iQ QC o © t s } . ' s v P P _ '' Mir A 100' PAp_KtNv ! i ' ..: LoT a ! 4-0 �. + r PUP' p w ELL kV K oseA r0 W I lu J 2 la) U. ST0R14 V\iA7R RE TENT 1ON `Po ND SC,ALE: t"=�0' 0 20 40 40 00 ?L O 1 1)L Pc N C�ALVAg`f��LLONS�HIF ApPRpVE D Tpac,EL4t-g20t2-12:()oo40 `�N . MAR 03 2023 5o z 1 SLAM) LAKE D(Z., ?o MASON COUNTY ENViRON,MENTAL HEALTH ti RE 8fit, S,c, v .k.'.(` , y ,. /,,, f� 5,G0349 ;S�`r' \ PAULA JOY JOHNSON T. cictu 't5t5ioNy.fi" V 2194377 MASON CO WA 03/02/2023 09 08 PM NOTCEup CALVARY FELLOWSIP 0184703 Rae File:Return To ,ilionouiiii311111i" iiiiiWu1�U1I11U Pam:: 2 Calvary Fellowship P.O. Box 432 Shelton. WA 98584 Grantor(s): (1) Calvary Fellowship , (2) Grantee(s): (1) PUBLIC Legal Description (1)TR C OF SP #311 AF#348098 Ptn TR 4 OF W1/2 NE1/4 SURVEY 14/47 (DOR#13000-001), SEC12, TWP2ON, R4W (Abbreviated form: i.e. lot, block, plat or section, township, range) Assessor's Tax Parcel: (1) 42012-12-60040 NOTICE OF OPERATION AND MAINTENANCE OF ON-SITE SEWAGE SYSTEM I (We) the undersigned grantor, hereby place this notice on record that the described real estate situated in Mason County, State of Washington; to wit the described real estate is served by an on-site sewage system that was approved and permitted on the condition that it would receive on-going operation and maintenance to assure it would continue to function in a manner that provides adequate treatment and disposal of sewage. Operation and maintenance of the on-site sewage treatment and disposal system must be done in accordance with the Mason County On-Site Standards, the Mason County Board of Health On-Site Sewage Regulations and Washington State Administrative Code: 246.272A On-Site Sewage Systems. These covenants shall run with the land and shall be binding to all parties having or acquiring any right, title, or interest in the land described herein or any part thereof, and shall inure to the benefits of each owner thereof. Dated on this .77 day of /cP.6/'frairj , 200&3. APPROVED MAR 0 3 2023 Signa raptor ;,1ASON CO +i Y E? IRONMENTAL HEALTH (1)U",(t-1--‘--t / , (2) RET Page 1 of 2 State of Washington County of Mason ) I, the undersigned, a Notary Public i and for the above named County and State, do hereby cert'fyithat on this c274day of , 20_.23 , O(,V 4AC,t perso Ily appeared before me, who is known to be signer of the above instrument, and acknowledged that he (she) (they) signed it. GIVEN under my hand and official seal the day and year last abo written. Not Pub in and for thg State,of ash' ton STAT NOTARY WASHINGTON residing at 'i EirJ,s744 � ��`t ,Sit kKALEY B. MACKIE My commission expires:6p (P ,269 Lie. No.22028372 My Appointment Expires JUNE 18,2028 APPROVED MAR 03 2023 MASON COUNTY ENVIRONMENTAL HEALTH RET Page 2 of 2