The URL can be used to link to this page

Home My WebLink AboutOWTS Installation Observations 03.19.17 March 19, 2017 Project No. C1185 David Dodson ddodson@rof.net Onsite Wastewater Treatment System (OWTS) Installation Observations Van Rand Park Owner’s Association Garfield County, Colorado Permit Number SEPT-05-16-4209 David, ALL SERVICE septic, LLC observed the installation of the onsite wastewater treatment system (OW TS) on February 8, 9, 13, 16, 22, and March 1, 2017 for the subject property. Excavation Services installed the system. The existing septic tanks were pumped and removed. The existing soil treatment area (STA) was over- excavated in the area of the new seepage pit. Any additional STA outside of the new seepage pit was abandoned in place. The new OWTS was placed in the designated easement on Lot 10 of the Van Rand Park Subdivision. The easement measures 57-feet (east and west) and 75-feet (north and south). The new OWTS consists of a 48-inch diameter vault with a man-way for access. Duplexing 1 horsepower, 230 volt Meyers grinder pumps were installed in the vault. A control panel with an audible and visual alarm was installed within line of sight of the pump vault. The alarm system also has an auto-dialer in the case of an alarm to call Dodson Engineered Products. We also tested the alarm at the time of the inspection. The pumping system has a counter system in order to track pump cycles. This system will assist in tracking the amount of wastewater entering the OWTS. Wastewater is pumped up to a 2000-gallon, single-compartment septic tank. Effluent gravity flows to an additional 2000-gallon, two-compartment septic tank with an effluent filter on the outlet tee. From the septic tanks, effluent gravity flows to a distribution box, which is accessible from grade. Speed Levelers were installed on the sewer pipes exiting the distribution box to assure equal distribution. The OWTS is subject to heavy machine traffic. All OWTS components are traffic rated. All connecting piping is Schedule 80. Excavation for the seepage pit was 35-feet long (east and west), 18-feet wide (north and south), and 12- feet deep below the inlet pipes. The bottom of the excavation was filled with 6-inches of ¾-inch diameter cleaned screened rock. Three 4-foot diameter perforated manhole rings were equally distributed within the seepage pit excavation. Manhole rings were surrounded by ¾-inch diameter cleaned screened rock, compacted in 2-foot lifts with a vibratory plate compactor. Cast iron extensions and cast iron lids were utilized to bring the manhole rings of the seepage pit to grade for access. HP-Kumar tested the compaction over the seepage pit. Their report is enclosed. Below is a recap of each inspection and the scope of work completed at each stage of construction: • February 8, 2017 8:15am – Observed excavation to final depth through contaminated soils. Total hole was 30-inches greater in length than specified due to the thickness of manhole rings (5- inches each side of ring). Contaminated soils were hauled to South Canyon Landfill. • February 8, 2017 1:30pm – 6-inches of gravel had been placed on the bottom of the excavation. • February 9, 2017 – Two manhole rings had been placed in the seepage pit. Removal of contaminated material was still in progress. • February 13, 2017 – Cover was placed over seepage pit. The distribution had been installed. Septic tanks were set. HP-Kumar had tested compaction over seepage pit. • February 16, 2017 – The old septic tanks were being pumped and removed. • February 22, 2017 – Plumbing was installed in the septic tanks. • March 1, 2017 – Controls for the solids handling pump were installed. Observed flow equalizers in distribution box. The audible and visual alarm was tested and found to be functional. We have estimated an average of wastewater flow of 1000 gallons/day. Continued water meter readings are required to assure the OWTS does not exceed the maximum design flow of 1000 gallons/day. If 1000 gallons/day is reached, the OWTS is not designed to handle excess flow and Garfield County must be notified. The OWTS was generally installed according to specifications. This observation is not a guarantee of workmanship and/or parts and materials. ALL SERVICE septic, LLC should be notified if changes are made to the OWTS in the future. Any additional OWTS construction must be according to the county regulations. LIMITS: Observations are limited to components that are visible at the time of the inspection. The installer must have documented and demonstrated knowledge of the requirements and regulations of the county in which they are working. The quality of the installation is dependent of the expertise of the installer, soil type, and weather conditions. Please call with questions. Sincerely, ALL SERVICE septic, LLC Reviewed By: Carla Ostberg, MPH, REHS Richard H. Petz, P.E. Beginning of excavation Encountering contaminated material Manhole rings Gravel for seepage pit Removing contaminated material Placement of manhole rings Gravel surrounding manhole rings Cast iron manhole lids access to manholes Distribution box with traffic rated riser D-box plumbed Tanks being set Cover over the seepage pit Old septic tanks removed Old pump chamber Tanks and distribution box Access to grinder pumping system Access to pump chamber Alarm system for grinder pump Distribution box with flow equalizers Note Schedule 80 pipes N ~ I O' 10' 20' Scale: 1" = 20'-0" LOT 9 s oo·oo·oo" E 15.89' INCOMING [ SEWER LINES FROM I BUSINESSES 2000-LLON, SINGLE-OMPARTMENT, CONCRET SEPTIC TANK WITH H20 RA ED LID EASEMENT STAKE ON FENCE 33 Four Wheel Drive Road Carbondale, Colorado 81623 Phone 970.309.5259 carla@allserviceseptic.com --- ·, 4. ·. <1 •• 4 .. "\.i:I . <I <!. "' .. 4 ... : .<I: -.;: . . " <I •• <! 4 ~·· .. ., .. 44 <I . '\· •• <I·. ~·· 4. LOT 10 .---35' x 18' x 12' DEEP SEEPAGE PIT WITH 4' DIA PERFORATED CONCRETE RINGS _,__..--r-----4" DIASCH-80 PVC PIPE (MIN 1% SLOPE TO PIT) DISTRIB ION BOX TO GRA WITH TRAFFIC ED RISER AND CAST .....__-----Al"('ON MANHOLE LID ____ ...,,.....__4" DIA SCH-80 PVC PIPE (MIN 1% SLOPE TOD-BOX) 4" DIA SCH-80 PVC PIPE (MIN 1% SLOPE TO TANK) ~ CD RECORD DRAWIN,G_ ~~JH COMPONENTS Date: 03/19/17 ~·.· Van Rand Park Owner's Association Lots 1-11, Van Rand Park Garfield County, Colorado Designed By: CBO ecord 1 Reviewed By: RHP Project Number: C1185 Drawn By: ANG Sheet 1 of 1 N ~ I I O' 10' 20' Scale: 1" = 20'-0" \ LOT 9 s oo·oo·oo" E 15.89' EASEMENT STAKE ON FENCE 33 Four Wheel Drive Road Carbondale, Colorado 81623 Phone 970.309.5259 carla@allserviceseptic.com --- p /":. ', ~ <"' .~ ..... ;.> d. ·.ll .,, : ~·· .. 4 ...... ···~ LOT 10 ~-- '\. <!". 4 '\. .4· .. ;. :4~ ·~·.· .· 4 .. ·. "'.4". .;, "\ • _45 • • • 4. :"' ·"' ~ .· ·.· ~· ~ '\·~."'·. i(J.. 4. . """ . .d. ~ . ·4 .. -" '\" ·.".. .<! ·. 4.l: . " 4 .. ·. . 4. . . _..q 4. '4l . ., . . 4. "\ "': .. ·.4 .· .. 4 '· 'Z_··., 4 4 . "'-". ··:., '4 '\. CD RECORD DRAWIN,G_ ~IJH MEASUREMENTS Van Rand Park Owner's Association Lots 1-11, Van Rand Park Garfield County, Colorado Project Number: C1185 Date: 03/19/17 Designed By: CBO ecord Reviewed By: RHP Drawn By: ANG Sheet 1 of 2 H-P~KUMAR 5020 County Road 154 Glenwood Springs, CO 81601 Geoteclmical Eng1neenng I Engineering Geology Phone : (970) 945-7988 Materials Testing I Environmental Fax: (970) 945-8454 Email: bQkglenwood@kumarusa .com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado -------- Earthwork Compaction Testing Report Client: Excavation Services Project No.: 17-7-165 Day: Monday Attn: Justin Nunn Date: 2/13/17 P.O. Box 1159 Report No.: 1 Page: 1 of 1 Carbondale, Colorado 81623 Project: Van Rand Industrial Park Leach Field Compaction Testing, 7150 Highway 82, Glenwood Springs, Colorado Weather: Partly cloudy, calm, rain overnight Temperature: 40° at 9 :30 am Earthwork Contractor: Excavation Services Equipment Used: Dual smooth drum roller Description of Earthwork Compaction tests were performed on 3/4" base course used as drywell backfill. Tested : Tests 1and3 indicated unacceptable compaction and about 2% above optimum moisture content. Test 2 indicated acceptable compaction and about 1 % above optimum moisture content. Proctor on file from material source was referenced. Verbal Communication: Mike Buster with Excavation Services was informed of our test results. As discussed, we will re-test areas of Tests 1 and 3 after they have been dried and reworked. Placement and Compaction Procedure: Not observed by H-P/Kumar Lift Thickness: Max. Rock Size: Moisture Conditioning : Comoactor(s) Used: Number of Passes: Nuclear Gauge Moisture/Density Test Results Location Field Dry Field Field Min. Test Depth or Density Moisture Comp. Comp. Proctor No . Elev. (pcf) Content (%) Req. Lab No. % (%) 1 7' E. of S. drywell subgrade 126.0 10.6 94 98 074-16 2 4' W. of middle drywell subgrade 130.8 9.2 98 98 074-16 3 5' E. of N. drywell subgrade 126.9 9.9 95 98 074-16 Proctor Sample Reference: Lab No. Method Description Max. Dry Opt. Dens .(%) Moist.(%) 074-16 (Job #115181A) ASTM D 698 %" Aaar egate Base Course WSM Pit 134.1 8.2 THIS REPORT PRESENTS OPINIONS AS A RESIA. T OF OUR 08SERVATIONSOF FILL PLACEMENT. WE HAVE RELIED ON THE CONTRACTOR TO CONT INUE APPL YING THE RECOMMENDED COMPACTIVE EFFORT ANO MOISTURE TO FILL DURING THE TI MES WHEN OUR OBSERVER IS NOT OBSERVING OPERATIONS. THE NUCLEAR DENSOMETER METHOD OF TESTING WAS USED IN SUBSTANTIAL ACCORDANCE WITH ASTM D 6938 Distribution : Excavation Services -Justin Nunn (justin@excavationservices.biz) /ljf Chris Newberry Thomas J. Westhoff, CET Field Technician Reviewed By H-P~KUMAR 5020 County Road 154 Glenwood Springs, CO 81601 Geotechnical Engineering Engineering Geology Phone: (970) 945-7988 Materials Tes1111g I Environmental Fax: (970) 945-8454 Email: hQkglenwood@kumarusa.com --- Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado - Earthwork Compaction Testing Report Client: Excavation Services Project No.: 17-7-165 Day: Thursday Attn: Justin Nunn Date : 2/16/17 P.O . Box 1159 Report No.: 2 Page : 1 of 1 Carbondale, Colorado 81623 Project: Van Rand Industrial Park Leach Field Compaction Testing, 7150 Highway 82, Glenwood Springs, Colorado Weather: Clear, calm, dry Temperature : 50° at 10:30 am Earthwork Contractor: Excavation Services Equipment Used : Dual smooth drum roller Description of Earthwork Compaction re-tests were performed on drywell backfill. All re-tests indicated Tested : acceptable compaction and near optimum moisture content. Verbal Communication: Mike Buster with Excavation Services was informed of our test results. Placement and Compaction Procedure: Not observed by H-P/Kumar Lift Thickness: Max. Rock S ize: Moisture Conditioning: Compactor(s ) Used: Number of Passes : Nuclear Gau g e Moisture/Density Test Results Location Field Dry Field Field Min. Test Depth or Density Moisture Comp. Comp. Proctor No. Elev. (pcf) Content (%) Req . Lab No. % (%) 1A Re-test of 1 from 02-13-17, subgrade 134.3 6.4 100 98 074-16 7' E. of S. d rvwell 3A Re-test of 3 from 2-13-17, subgrade 130.9 6.9 98 98 074-16 5' E. of N. drvwell Proctor Samp le Reference: Lab No. Method Description Max. Dry Opt. Dens .(%) Moist.(%) 074-16 (Job #115181A) ASTM D 698 %" Aaaregate Base Course, WSM Pit 134.1 8.2 THIS REPORT PRESENTS OPI NIONS AS A RESULT OF OUR OBSERVATIONSOF FIU PLACEMENT, WE HAVE RELI ED ON THE CONTRACTOR TO CONT INUE APPi. YING THE RECOMMENDED CO MPACTIVE EFFORT ANO MOISTURE TO FILL DURING THE TI MES WHEN OUR OBSERVER IS NOT OBSERVING OPERATIONS, THE NUCLEAR DENSOMETER METHOD OF TESTING WAS USED IN SUBSTANTIAL ACCORDANCE WITH ASTM 0 6938. Distribution: Excavation Services -Justin Nunn (justin@excavationservices.biz) /ljf Chris Newber!l Thomas J. Westhoff, CET Field Technician Reviewed By 832‐R‐13‐002 Do Your Part, Be SepticSmart: The Do's and Don'ts of Your Septic System Learn these simple steps to protect your home, health, envi r onment and property value: u*'*"#Mbe1Wt+t+ sept1csmart" U.S. Environmental Protect ion Ag ency P.r.otect It and Inspect It: Do: • Have your system inspected (in general) every three years by a licensed contractor and have the tank pumped, when necessary, generally every three to five years. Don't: • Pour cooking grease or oil down the sink or toilet. • Rinse coffee grounds into the sink. • Pour household chemicals down the Do: • Eliminate or limit the use of a garbage disposal. • Properly dispose of coffee grounds & food. sink or flush them . • Put grease in a container to harden before discarding in the trash. • Flush non -degradable products or • Dispose of these items in the trash can! chemicals, such as feminine hygiene products, condoms, dental floss, diapers, cigarette butts, cat litter, paper towels, pharmaceuticals. Don't: • Park or drive on your drainfield. The weight can damage the drain lines. • Plant trees or shrubs too close to your drainfield, roots can grow into your system and clog it. Don't • Concentrate your water use by using your dishwasher, shower, washing machine, and toilet at the same time. All that extra water can really strain your septic system . Do: • Consult a septic service professional to advise you of the proper distance for planting trees and shrubs, depending on your septic tank location. Do: • Stagger the use of water-generating appliances. This can be helpful especially if your system has not been pumped in a long time. • Become more water efficient by fixing plumbing leaks and consider installing bathroom and kitchen faucet aerators and water-efficient products.