SmallCommunityOWTS:Lykins GulchHOAElla Anguiano, EIT Church OWCJanuary 20, 2017

History ● Lykins Gulch HOA – 9442 Lykins Pl● Septic smart (great resource!)

● Originally installed in 1971● Collection System, batch reactor (Biopure),polishing pond, a trench● Many instances of mistreatment● Five houses; OD – 12 bedrooms (4 houses);RD – 14 (5 houses)

Des

ign

Proc

ess ★ Define constraints

★ Can’t afford state system => reduce flow★ Needs of the client★ Elderly using portapotties★ Gather information★ Septicsmart★ Design★ Really 2 designs

ImplementingA Solution

● Constraints of an onsite system in Colorado○ 5 3-bedroom houses

■ Design flow = 2,250 gpd○ 4 3-bedroom house; 1 3-bedroom house

■ Design flow = 1,800 gpd■ Design flow = 450 gpd

● Not to exceed 2,000 gpd

Get to Knowthe Site

• Existing infrastructure• Soil conditions• Community garden

ExistingSystem• Biopure processing plant

• Aeration and chlorine• It was in two pieces

ExistingSystem

● 1971 install – pond 45 yearsold● 1,788 GPD (Pond 15000)● Polishing Pond

Test Pits ● First three test pits all claystone○ Ground water

Test Pit 1 Test Pit 2 Test Pit 3

Final TestPits

● Seven test pits were dug thatday● 4-7 were all rocky (hallelujah)

Options forDesign

● Really only one option for the system❑ Over-excavated❑ Sand Filter❑ Preference to chambers❑ Pressure dosed

DesignComparison

● Using an LTAR from claystone○ 18,000 SF

● Using an LTAR from Sand○ 1,800 SF○ Still large but manageable

ExistingRecords

● Plats from out of businesssurveying company● Aerials

○ County and Google● Contours from the county● Pictures of construction● Maps drawn by residents

This Design ● Visit the site❑ Consider the spread of the OWTS

■ Take grade shots get elevations❑ Staking the field reveals drainage

● Request an easement for theindividual property

Future ● Little reserve area considering the clay● Great installer done right the first time● Cross manifold feeds❑ Greater resting time between doses

FutureIndividualResidence

■ Built-in reserve area in the easement

Inst

alla

tion ★ Installer – 2D Enterprises

★ Communicating with client, installer,county★ Unforeseen problems★ Inspection

Execution ● ADV located in wrong place in site plan○ Error in elevation calculations

● Float separation○ Physically unable to get correctseparation

FinalObservation ● Beautiful system

● Tracer wire for future location● ADV placed at high point

Results andReflection

● Clients very happy● Final Observation December 1st

■ No portapotties in the winter!■ Community OWTS specific problems

■ Communicating efficiently■ Paying for the system■ Responsibility for the systemmaintenance❑ Potters

● Look for the soil● Use all resources● Design for longevity