Merrill Crescent Septic Assessment, Lot 106, Merrill Rd., Madeira Park

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Loraine Singleton
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K.E.R. Enterprises Inc 920 Garden Bay Rd Garden Bay BC V0N 1S1 June 19,2017 Merrill Crescent Septic Assessment, Lot 106, Merrill Rd., Madeira Park Condition of Existing Septic Field: 1.

1 K.E.R. Enterprises Inc 920 Garden Bay Rd Garden Bay BC V0N 1S1 June 19,2017 Merrill Crescent Septic Assessment, Lot 106, Merrill Rd., Madeira Park Condition of Existing Septic Field: 1. Eight one hundred foot runs end fed from distribution box. Observation - One hundred foot gravity fed runs would be more efficient with centre fed distribution box placement. Centre fed ensures more even distribution of effluent. 2. Top and bottom runs exposed at north end of field. Observation - No indication of effluent reaching the end of the top run. This could possibly be due to settling of pipe over 100 foot length. The bottom run shows signs of imal effluent at the end of the run.. The bottom two runs have an intrusion of cedar roots at the south end of the field which would definitely affect effluent flow. 4. Two inspection ports added at bottom of field showed no sign of effluent ponding in ports. Summary: Approximately 40-60% of the field appears to be in working condition. Soil analysis & percolation test reports for reserve site attached. Location of test pits attached.

2 Test pits were strategically dug to arrive at an overall representation of soil conditions and also to document the changes in the soil profile from the uphill lot boundary to the area adjacent to the existing field. Two holes were dug at locations A and B to check for soil saturation below the field. Both pits showed no signs of effluent. Pits were dug to 90 cm and inspection ports were installed for future monitoring. In the process of digging Pit A cedar roots were encountered growing close to the surface and down into the southeast portion of the existing field. This is a clear indication of root intrusion and would certainly affect distribution of effluent. Also the perimeter of the field has several large alders that most likely have roots extending into the field as well. By exposing the ends of the top and bottom runs an indication is provided of effluent flow from the distribution box to the far ends of the field. It is very difficult, if not impossible, to achieve even gravity distribution over a 100 foot run. Standard practice allows for a run maximum of 0 feet. A combination of poor flows to the ends of the field and cedar root intrusion leads to the conclusion that in a large portion of the runs the effluent is not being evenly distributed throughout the field. However, near perfect soil conditions has allowed the field to function as well as it has. The lower field closest to Merrill Rd. has not been in use for some time. The valve is in the closed position. SCRD maintenance technician indicated that there had been effluent surfacing. The possibility exists that the presence of the surface effluent was coincident with the field being shut off. The entire flow from the treatment plant has been into the upper D box. Thus only half the field is in use. The cedar root intrusion into the lower field has blocked flow to the runs. This situation will continue and eventually the roots will make their way into the upper field. It would not be prudent to expose the piping to ascertain the extent of field damage at this time. This would create the opportunity for effluent flow to the surface. Root intrusion has had a significant impact on the existing field. The upper D box has a damaged lid and some root growth inside the box. This is a common problem with older concrete D boxes as the lids don't seal well. Otherwise the box is in serviceable condition and it appears that all four outflow pipes are working. The lower D box also has a damaged lid but is also in serviceable condition. The lids on both boxes should be replaced, but may difficult to find. Both D boxes have the 2" pump line from valves directly installed. This practice has been changed to adding a 4" pipe to the pump line in order to diffuse the flow, creating less turbulence in the D box and more even flow to the outlets.

3 Recommendations 1. All trees (mostly maple and alder) within 2' of the existing field and proposed field should be removed. The large cedars will definitely have to removed as there is no way of preventing cedar root growth into septic fields. A green buffer around the lot could remain. 2. Consider pressure distribution as a method of delivering effluent to the fields. This has been proven to be the most efficient method of effluent distribution. A different pump may be required at the treatment plant and possibly improved filtration and a zone valve installed at the field site.. Existing pump doses from the treatment plant could be monitored with a cycle counter. Data from actual water volumes to the field would then be used to design and repair the existing field. 4. Because the soil conditions are ideal for septic field use, gravity distribution is also possible. It would require a certain amount of restructuring at the field site. A series of beds, instead of the existing trench distribution, would work well. They would be easy to install, monitor and maintain. Drawing (not to scale) attached of how a system like this might look.. A new field could be installed adjacent to the old field, then the old field repaired or replaced. It is possible half of the existing field could still be used, i.e. the half closest to the new field location. Concrete D boxes should be replaced with poly D boxes with tight fitting lids. 6. * The test pits are covered with plywood and surrounded by flagging tape. They should not be left open any longer than necessary.*

4 Merrill Crescent Existing Septic Field - Lot 106

5 Merrill Crescent Concept Design

6 Location #1 Slope: 17% Date: June 14, 2017 To Color texture s,l,sl,ls,c Rocks gr,cb,st,vgr vch,vst Coarse Gravel % Type gr,abk,sbk,pi,pr,cpr,sg m Structure Grade 0,1,2, consistence Roots Size f,m,c Depth From To Mottles ity Contrast F,D,P Moisture s,w,m,d 0-18 Dark sl st 8 sbk 1 VFR c m,c m Light Reddish ls cb 8 sbk 1 VFR c m,f m ish Yellow silty sand gr 10 abk 2 VFR f f 8 90 f f m Olive sandy clay gr < sbk 1 VFR f f f f m 120 cm deep Bottom Rock EST 110 cm.+

7 Location #2 Slope: 17% Date: June 14, 2017 To Color texture s,l,sl,ls,c Rocks gr,cb,st,vgr vch,vst Coarse Gravel % Type gr,abk,sbk,pi,pr,cpr,sg m Structure Grade 0,1,2, consistence Roots Size f,m,c Depth From To Mottles ity Contrast F,D,P Moisture s,w,m,d 0-20 Dark sl st 10 sbk 1 VFR m m,c m Light Reddish s gr 1 gr 0 Loose f m,f m Light Olive s gr 10 gr 0 Loose f f f f m 90 cm deep Bottom Rock EST SHWT@8+ cm

8 Location # Slope: 17% Date: June 14, 2017 To Color texture s,l,sl,ls,c Rocks gr,cb,st,vgr vch,vst Coarse Gravel % Type gr,abk,sbk,pi,pr,cpr,sg m Structure Grade 0,1,2, consistence Roots Size f,m,c Depth From To Mottles ity Contrast F,D,P Moisture s,w,m,d 0-2 Dark sl gr < sbk 1 VFR c m,f m 2-80 Yellowish s gr 1 gr 0 Loose c f m Greyish silty clay gr < abk 2 Firm f f f f m Light s gr 10 gr 0 Loose c f f f m 10 cm deep Bottom Rock EST SHWT@140+ cm

9 Location #4 Slope: 17% Date: June 14, 2017 To Color texture s,l,sl,ls,c Rocks gr,cb,st,vgr vch,vst Coarse Gravel % Type gr,abk,sbk,pi,pr,cpr,sg m Structure Grade 0,1,2, consistence Roots Size f,m,c Depth From To Mottles ity Contrast F,D,P Moisture s,w,m,d 0-1 Dark sl gr < sbk 1 VFR m c,m m 1-70 Light Yellowish s gr gr 0 Loose c f m Light Olive s gr 0 Loose c f f f m 99 cm deep Bottom Silty Clay EST SHWT@90+ cm

10 Location # Slope: 17% Date: June 14, 2017 To Color texture s,l,sl,ls,c Rocks gr,cb,st,vgr vch,vst Coarse Gravel % Type gr,abk,sbk,pi,pr,cpr,sg m Structure Grade 0,1,2, consistence Roots Size f,m,c Depth From To Mottles ity Contrast F,D,P Moisture s,w,m,d 0-40 Dark sl gr < sbk 1 VFR m c,m m Light Yellowish Red s gr < gr 0 Loose c m,f m Olive s gr < gr 0 Loose f f m Light ish Grey scl gr sbk 1 VFR f f f f m 160 cm deep Bottom Clay EST 10 cm.+

11 Location #6 Slope: 17% Date: June 14, 2017 To Color texture s,l,sl,ls,c Rocks gr,cb,st,vgr vch,vst Coarse Gravel % Type gr,abk,sbk,pi,pr,cpr,sg m Structure Grade 0,1,2, consistence Roots Size f,m,c Depth From To Mottles ity Contrast F,D,P Moisture s,w,m,d 0-40 Dark sl gr < sbk 1 VFR m c,m m Reddish s gr < gr 0 Loose c m,f m Yellowish s gr < gr 0 Loose c f m Dark Olive s gr <8 gr 0 Loose f f f f m 17 cm deep Bottom Silty Clay EST 160 cm.+

12 K.E.R. ENTERPRISES PERC TEST Date: Employee: Job No: Customer: Test Location: HOLE 1 Average MD 14-Jun-17 K.E.R. ENTERPRISES Perc #1 Merrill Cres Test Location: 1 sec 4 4 SCRD HOLE 1 Perc #2 Merrill Cres 00 sec 47 sec 6 0 sec 0 sec 7 0 sec 1 sec 7 0 sec 0 sec 6 1 sec Machine dug inspection hole K.E.R. ENTERPRISES PERC TEST Average 1 Date: Employee: Numbered Perc Hole 14-Jun-17 Job No: MD Machine dug inspection hole K.E.R. ENTERPRISES PERC TEST Customer: SCRD Test Location: Perc # Merrill Cres Test Location: Perc #4 Merrill Cres Average MD sec HOLE 1 00 sec 0 sec 40 sec 4 sec 0 sec 4 00 sec 6 0 sec 28 sec 9 sec Machine dug inspection hole K.E.R. ENTERPRISES PERC TEST Average Date: Employee: Numbered Perc Hole 14-Jun-17 Job No: MD Machine dug inspection hole K.E.R. ENTERPRISES PERC TEST Customer: SCRD Test Location: Perc # Merrill Cres Test Location: Perc #6 Merrill Cres Average MD 10 sec 1 1 HOLE 1 00 sec 2 sec 40 sec 0 sec 6 22 sec 2 00 sec 7 02 sec 1 6 sec 6 01 sec Machine dug inspection hole Average Numbered Perc Hole MD 14-Jun-17 Date: Numbered Perc Hole 14-Jun-17 Job No: SCRD 1 4 Employee: Customer: HOLE 1 Date: Numbered Perc Hole Job No: SCRD 2 2 Employee: Customer: HOLE 1 14-Jun-17 Job No: Customer: Date: Employee: SCRD PERC TEST Machine dug inspection hole 6 Numbered Perc Hole

*NO SEPTIC SYSTEM EXCAVATION WITHOUT AN APPROVED PERMIT IN POSSESSION**

***NO SEPTIC SYSTEM EXCAVATION WITHOUT AN APPROVED PERMIT IN POSSESSION**** SMALL WASTEWATER FACILITY APPLICATION PACKET A PERCOLATION TEST WITH A 10 SITE HOLE AND/OR AN APPLICATION ALONG WITH AN ADDRESS MUST BE COMPLETED AND SUBMITTED TO THE DIVISION OF ENVIRONMENTAL HEALTH BEFORE