HomeMy WebLinkAbout1989 Jul 12 - Down Cape Engineering Letter and Nitrogen Loading Calculations 362-4541
939 main street rt 6a
yarmouth port J
mass 02675 down wn cape engineef,/,g iTilli
civil engineers&land surveyors
structural design
Arne H.Ojala P.E..R.L.S.
land court Richard R.Fairbank P.E.
surveys
site planning July 12, 1989
sewage system Bruce Murphy
designs Yarmouth Health Department
Town of Yarmouth
Rt. 28
inspections South. Yarmouth, MA 02664
RE: Lots #1, 3, 4, & 5 Edgewater Dr. , South Yarmouth
permits
Dear Bruce,
Enclosed please find nitrogen loading calculations for the
above referenced sites. As discussed at the July 10, 1989
Board of Health meeting, the combined nitrogen concentra-
tion for the four lots with three bedroom homes and no lawn
areas is 4.98 ppm (see calculation sheet #1) .
The subdivision consists of eight lots with a road layout
area of 0.58 acre. If this area is divided evenly among the
I eight lots, it appears that small lawn areas could be added
' to my clients four lots without exceeding the 5 ppm
nitrogen loading concentration limit (see calculation sheet
#2) . This second calculation sheet includes a lawn area of
625 sf for each of the four lots and results in a final
nitrogen loading concentration of 4. 67 ppm.
If you have any questions on this material or require
additional information, please call me at 362-4541.
Sincerely,
lir441G vim,
• .
Thomas . McLellan
Down Cape Engineering, Inca
TJM/amp
2TJMLT89
Encl.
cc: Everett Boy
*Sheet #2
NITROGEN LOADING CALCULATIONS
(Using Town of Yarmouth Method, Dated 7-21-86)
LOCUS; Lots #1, 3, 4 & 5
Edgewater Drive
South Yarmouth
PREPARED FOR: Reef Realty
PREPAREd BY: Down Cape Engineering, Inc.
Lot #1 = 40,011 sf
#3 = 41,252 sf
#4 = 54,061 sf
#5 = 57,349 sf
Road layout = 25,081 x 4/8 = 12540 sf
Total = 205,213 sf = 4.71 acres
1 . 3 bedroos/dwelling = 4 occpuants
x 4 lots = 16 occupants
2. 16 x 5 = 80
3. 2500 sf, total lawn area proposed
4. 4.5 n , LA
r 5. 84.5
6. 4.71 acres
7. (84.5 x 0.275)/4.71 = 4.93 ppm
*Sheet #1
NITROGEN LOADING CALCULATIONS
(Using Town of Yarmouth Method, Dated 7-21-86)
LOCUS: Lots # 1, 3, 4, & 5
Edgewater Drive
South Yarmouth
PREPARED FOR: Reef Realty
PREPARED BY; Down Cape Engineering, Inc.
Lot #1 = 40,011 sf
#3 = 41,252 sf
#4 = 54,061 sf
#5 = 57,349 sf
Total = 192, 673 sf = 4.42 acres
1 . 3 bedrooms/dwelling = 4 occupants
x 4 lots = 16 occupants
2. 16 x 5 = 80
3. No lawn area
4. No lawn area
5. 80
6. 4.42 acres
7. (80 x .275) /4.42 = 4. 98 ppm