Armenian Engineers and Scientists of America

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Civil Engineering Committee

Dzidzernavank SchoolDzidzernavank SchoolProjectProjectPart-IPart-I

Designed for 50 Students and Office Personnel of the Dzidzernavank Village Dzidzernavank Village School in Kashatagh, Artcakh – ArmeniaSchool in Kashatagh, Artcakh – Armenia

Designed By: Hrand Safarian, P.E. (CE) State of California-USAwww.h.safarian-engnrg@sbcglobal.net Phone: (818) 708-0864

Design Date: June 21, 2008

PSD-Tsitsernavank, Continue June 21, 2008 Revision:

CODE REFERENCES AND DESIGN SOURCES :* City of Los Angeles Building Code –LABC and City of Los Angeles

Plumbing Code-LAPC* City of Los Angeles Amendments for the 2007 California Plumbing

Code-CPC Appendix K- Private Sewage Disposal Systems* International Private Sewage Disposal Code-IPSDC International Code Council –ICC* Other Counties Codes. * Civil Engineering Design Data Book.

CONTENTS :GENERAL INFORMATION - Received from Site : Tsitsernavank Village and School Photos. Proposed PSD Site Location and Soil Type.

PART-I : SEPTIC TANK CAPACITY DESIGN: CRITERIA , SIZE, SHAPE AND DETAILS .

PART- II : DESIGN CRITERIA AND GENERAL NOTES.

PART-III : SEPTIC TANK STRUCTURAL DESIGN : MATERIAL , DETAILS AND SKETCHES.

PART- IV : SEEPAGE PITS or /and DISPOSAL FIELD/LEACH LINES DESIGN: W/SKETCHES

Proposed Toilet Room Location

Proposed PSD Location

The present School BuildingsBeing Renovated

Homes

50% Clay – 50% Sand50% Clay – 50% Sand

60% Sand- 40% Conglomerate of: 20% Clay, and 20% dirt

80% Rocks (big and small)20% Conglomerated dirt

4Meters

30 cm

250cm

120cm

Ground Composition at the PSD Vicinity

Ground Surface

200 Meters

350 Meters

PART-I : SEPTIC TANK CAPACITY DESIGN: CRITERIA , SIZE, SHAPE AND DETAILS .

Hrand’s Preliminary Provided Guide Dated March 14, 2008: Page: PI 1-3

Septic Tank Design Criteria: 2008 City of Los Angeles Plumbing CodeAmendments for the 2007 California Plumbing Code: Page : PI 4-7

SEPTIC TANK- DESIGNED. DETAILS & SKETCHES: Page: PI 8-8

PSD-SEPTIC TANK CALC’S

Liquid Capacity:

Each Student : 20 Gallons (76 liter) Waste per day Assumed 50 students and office members x 20 Gals/day= 1000 gals (3785 liter)

1000x 1.5 = 1500 gals ( 5678 Liter / 5.7 cubic meter)

Assume the inside septic tank liquid: 4’wide x 5’ depth 10’ long= 200 cubic foot

200x 7.48/gallon/cubic foot= 1500 gallon (5.7 cubic meter) OK

Add 12” on top of liquid.

Septic Tank inside dimensions : 4’x6’x10’ (1.22x1.83x3 M)

Exterior dimensions: 5’x7’x11’ ( 1.52x2.13x3.35 M)

24” or 2’ ( 61 CM) Soil on top.

The depth is 9’ (2.74 M)