GI - 23904 HWY 99.pdfJAN -06-2009 08:41 EDMONDS WASTE TREATMENT 425 771. 0255 P.05
Grease Interceptor Sizing Worksheet
Facility Name: a ,
Address: D w E:�A*A&, S i.t DSO Suite No.:
• A Grease Interceptor permit is required ($365.00 fee). Contact the Pretreatment Technician
(425-672-5755) if you have any questions and also to get signature approval on this form.
• Per Edmonds City Code the minimum sized Grease Interceptor permitted is 500 gallons.
Maximum sized unit is 4,000 gallons.
NUMBER OF MEALS SERVED AT PEAK HOUR A = 5.2,
Based on the total number of seats and average time per meal.
Lounge and bar seating is counted at 20%.
WASTE FLOW RATE (Choose one)
B = 1S
• With Dishwashing Machine ...................... 6 gallon flow
• Without Dishwashing Machine ................. 5 gallon flow
• Single Service Kitchen* .............................. 2 gallon flow
• (Food Waste Disposer ........................ add 1 gallon flow)
RETENTION TIMES (Choose one)
C
• Commercial Kitchen Dishwasher ............. 2.5 (tours
• Single Service Kitchen* .............................. 1.5 hours
STORAGE FACTORS (Choose one)
D
• Full Service Kitchen 0-12 hour operation:........... 1
• Full Service Kitchen 12-20 hour operation:......... 2
• Full ServiceXitchen 24 hour operation ............... 3
• Single Service Kitchen*:............ .... 1.5
........................
• (Alternate factor for occasional use kitchen .........
Minimum Interce for Size & uld capacity) A x B
x C x D =
*A single service kitchen refers to a restaurant where disposable
dishware is used and
dishwashing operations are therefore greatly reduced.
----------------------------------------(For City use only below this line)---------------------------------- .............
Remarks:
Size Approved: 1901:� gal. Approved by: SA,� Date: C d oc,
retreatmentecTr' hniciaa
[Rev. Feb. 20041
TOTAL P.05
EDMONDS WASTE TREATMENT
il. Cantr6ctor to Adjust
To Grade
I MIN. PVC
Vent Requ
(ase nota 12
ater• Tkht Manhole
Adopter .......... .
426 771 0255 P.04
Coettetsd; - -
Yllater Tight, Costings
and t3olted lids Sea Note 8
(See Nett B)
2 S• to
Pjacdvt Gal
s• Ste nwu 't 13• ;-••...... f ,i M
6" PVC
(sea notel0 Y (t Iral
x m'n X al Rise
uld ",to t
a or. Sulace
OonnrGtlon at`
bolding to faller
- A1MUU •tan0ar+ps
for aide sewer note 15
instellrxtiona
Grout 'aroused !;
i2 both sides 1
of Precast b0114 ,.
------ PRECAST' CONCRETE wuvr; UTILITY VAULT Co, TNG OR EQUAL (SEE NOTE 4)
SIZE ACCORDING T'0 UNIFORM PLUMBING COOlr—MOST CURRENT VMSrON
NOTES: INSTALL `PER MANUFACTURE RE4UiREUENTS"
(see nate 10
Stainless Steel Strap
and 3/r- Anchor Solt
(T•yplcd) .
1• Grog--Wattr oily. Stack—Water shall he avrfed by separate side sewer.
Z. locate , tntweeptor within close proximity of drl" far access by paint. vehiole.
J. If vault is not slatted to ooaept precast sorsa, baffle then precast Bono, shad pe held In place by (2)
3"x3"%3/8•• angle (4ftr long) ottached to vault- wall wtth (4 W) 1/2' bolts and nuts (+ylth washe►rs� spaced
14" O.G. 0"916 and taatertere shall be stainless steel.
4-. Praaast"Yauit and NOMe shut have kl►ackouts at all pipe openings. If knockouts ora not present then pipe'
oaa"inge shall be 2 forger than prps diornetec,
3..P011itiom pips risers below access openings to allow dear oceesa to riser and• vault chomber for sampling
inspaetion.
S. lids, . Eramae, and BWta shall mast District stcodards for monhdor lids and/or clean—outs as applicable.
Z. Conectlons through concrete "(011S require rater tight manhole adapters. Seol all pips connections with
non,%rtnft' grout.
IL Clears -outs requtred per District standards (2.37 to S' from vault).
9. FTq with clean water prior to start up of Yyslarn.
10. I:ornoe SO, coupling or' opprovad equal. ALDERWOOD WATER DISTRICT
1 t. Dledlarga required to comply with [Nstrtot 0lschpr9R lim"
12. Interceptors shall hove venting per uniform
Wumbtng Cade_ (f" minlenufn) PRE --TREATMENT INTERCEPTOR
3. Vault and Rttinge ShO be .rater tight.
1� All frlt(ngs shelf be daatgnad for grease retention.
13. Liquid dtpth shall nat be Ion then 2.3` nor water QATE• 4-41 DWG. SS -•-4
than 8% per UPC H 103.2,2. .
APPROVED BY•
DIST- CT ENGINEER