APPENDIX A FIELD ACTIVITY REPORTS - Los Angeleseng2.lacity.org/whitepoint/Appendix A - Field Activity... · 2019-09-01 · Field Activity Report dated December 16, 2011 (4 pages)

51-1-10053-003

APPENDIX A

FIELD ACTIVITY REPORTS

51-1-10052-003-R1 AA.docx/wp/ady 51-1-10052-003

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APPENDIX A

FIELD ACTIVITY REPORTS

TABLE OF CONTENTS

FIGURES

Report

No.

1B Field Activity Report dated November 30, 2011 (2 pages)

2B Field Activity Report dated December 1, 2011 (2 pages)








1C Field Activity Report dated December 12, 2011 (2 pages)

Daily Field Record dated December 12, 2011 (1 page)

1A Field Activity Report dated December 13, 2011 (3 pages)










51-1-10052-003-R1 AA.docx/wp/ady 51-1-10052-003

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Report No.

Daily Field Record dated December 16, 2011 (2 pages)





Daily Field Record dated December 22, 2011 (2 pages)


12 Field Activity Report dated December 28, 2011 (2 pages)

PROJECT NO.: 51-1-10052-004

REPORT DATE: Wednesday, November 30, 2011

REPORT NO.: 1B SW FIELD REP.: Chris Sexton

PROJECT NAME/LOCATION White Point Landslide / Paseo del Mar, Los Angeles, CA

CONSTRUCTION OBSERVATIONS

LIMITATIONS: The Shannon & Wilson field representative is present on site solely to observe the field activities of the contractor identified and keep our client informed of the progress and quality of the work. The presence and activities of the Shannon & Wilson field representative and our acceptance of any non-conforming work or failure to reject any non-conforming work does not relieve the contractor from complying with its contract documents. Shannon & Wilson does not have the authority to direct the contractor’s work. Any information provided by the Shannon & Wilson field inspector is intended solely to advice the contractor of the technical requirements of the plans and specifications and/or design concept. The contractor is solely responsible for its means, methods, sequences, construction site safety, quality of work, and adherence to the contract documents. (V1.1)

REVIEW BY (PM initial/date)

Page 1 of 2

DAILY FIELD ACTIVITY REPORT

REPORT SUMBITTED TO: CONTRACTOR NAME AND CONTACT: WEATHER & TEMP. Partly Cloudy, 45-65° City of

LA: Robert Hancock General

Subcon-tractors From 0700 hrs to 1500 hrs

Travel: 1 hour 75 miles

NO Lunch Taken

NO. TOPIC AND LOCATION

DESCRIPTION OF FIELD ACTIVITY, OBSERVATIONS AND RECOMMENDATIONS TO OWNER

FURTHER ACTION RECOMMENDED TO

OWNER

1

Drilling at Boring B-2

Elias and Jose of Roy Bros. drilling mobilized their E-Z Bore drill and support equipment to the site and drilled at the boring B-2 location (location shown on attached site plan). The dril-ler used a 2-foot diameter bucket auger to drill the entire depth. The hole was advanced to 55 feet when drilling proce-dures stopped for the day.

PROJECT NO.: 51-1-10052-004

REPORT DATE: Wednesday, November 30, 2011







SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004

REPORT DATE: Thursday, December 01, 2011






Page 1 of 2






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their E-Z Bore drill and support equipment to the site and drilled at the boring B-2 location (location shown on attached site plan). The dril-ler used a 2-foot diameter bucket auger to drill the entire depth. The hole was advanced from 55 feet to 104 when drill-ing procedures stopped for the day due to a cracked stem. Groundwater seepage was noted below 68 feet.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004

REPORT DATE: Friday, December 02, 2011






Page 1 of 2






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their E-Z Bore drill and support equipment to the site and drilled at the boring B-2 location (location shown on attached site plan). The dril-ler used a 2-foot diameter bucket auger to drill the entire depth. The hole was advanced from 104 feet to 120 when drilling procedures stopped for the day. Groundwater seepage was noted below 68 feet and standing water was noted at 88 feet at 7 AM. Chris Sexton, from Southwest Engineering, be-gan down-hole logging procedures at 10:30 AM and was completed at 1:30 PM. Roy Bros. left the site after down-hole logging procedures.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004

REPORT DATE: Saturday, December 03, 2011






Page 1 of 2






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their E-Z Bore drill and support equipment to the site and drilled at the boring B-3 location (location shown on attached site plan). The dril-ler used a 2-foot diameter bucket auger to drill the entire depth. Samples were driven by the weight of the Kelly bars, at approximately 12-inch drop. The height of the drop was determined by the operator, by mechanical Cathead mechan-ism. The hole was advanced to 55 feet when drilling proce-dures stopped for the day.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004

REPORT DATE: Monday, December 05, 2011






Page 1 of 2






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their E-Z Bore drill and support equipment to the site and drilled at the boring B-3 location (location shown on attached site plan). The dril-ler used a 2-foot diameter bucket auger to drill the entire depth. Samples were driven by the weight of the Kelly bars, at approximately 12-inch drop. The height of the drop was determined by the operator, by mechanical Cathead mechan-ism. The hole was advanced from 55 feet to 96 feet when drilling procedures stopped for the day. Chris Sexton, from Southwest Engineering, began down-hole logging procedures at 10:30 AM and was completed at 1:30 PM. Roy Bros. left the site after down-hole logging procedures.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004

REPORT DATE: Tuesday, December 06, 2011






Page 1 of 2






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their E-Z Bore drill and support equipment to the site and drilled at the boring B-3 location (location shown on attached site plan). The dril-ler used a 2-foot diameter bucket auger to drill the entire depth. Samples were driven by the weight of the Kelly bars, at approximately 12-inch drop. The height of the drop was determined by the operator, by mechanical Cathead mechan-ism. The hole was advanced from 96 feet to 120 feet when drilling procedures stopped for the day. Standing groundwa-ter water was noted at 85 feet at 7 AM. Chris Sexton, from Southwest Engineering, began down-hole logging procedures at 12:30 PM and was completed at 2:30 PM. Roy Bros. left the site after down-hole logging procedures.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004

REPORT DATE: Wednesday, December 07, 2011






Page 1 of 2






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their E-Z Bore drill and support equipment to the site and drilled at the boring B-4 location (location shown on attached site plan). The dril-ler used a 2-foot diameter bucket auger to drill the entire depth. Samples were driven by the weight of the Kelly bars, at approximately 12-inch drop. The height of the drop was determined by the operator, by mechanical Cathead mechan-ism. The hole was advanced to 55 feet when drilling proce-dures stopped for the day. Seeping groundwater water was noted at 55 feet at 12 PM.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004







Page 1 of 2






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their E-Z Bore drill and support equipment to the site and drilled at the boring B-4 location (location shown on attached site plan). The dril-ler used a 2-foot diameter bucket auger to drill the entire depth. Samples were driven by the weight of the Kelly bars, at approximately 12-inch drop. The height of the drop was determined by the operator, by mechanical Cathead mechan-ism. The hole was advanced from 55 feet to 100 feet when drilling procedures stopped for the day. Standing groundwa-ter water was noted at 72 feet at 11 AM. Chris Sexton, from Southwest Engineering, began down-hole logging procedures at 12:00 PM and was completed at 2:00 PM to a depth of 80. Roy Bros. left the site after down-hole logging procedures.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004







Page 1 of 2






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their E-Z Bore drill and support equipment to the site and drilled at the boring B-4 location (location shown on attached site plan). The dril-ler used a 2-foot diameter bucket auger to drill the entire depth. Samples were driven by the weight of the Kelly bars, at approximately 12-inch drop. The height of the drop was determined by the operator, by mechanical Cathead mechan-ism. The hole was not advanced today. Standing groundwater water was noted at 52 feet in the morning. Water was bailed from the hole to a depth of 93 feet. Down-hole logging pro-cedures were conducted by Dean Francuch to a depth of 56 feet. Roy Bros. left the site after down-hole logging proce-dures.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004


REPORT NO.: 1C SW FIELD REP.: Cody Sorenson





Page 1 of 2






NO Lunch Taken




OWNER

1


Boart Longyear mobilized their Sonic core drilling and sup-port equipment to the site and drilled at the boring B-6 loca-tion (location shown on attached site plan). The driller sonic-coring equipment to drill the entire depth. Drilling began at 11:45 AM after the rig was set-up. A blown hydraulic hose caused a break in the drilling from 12:00 PM to 3:45 PM as they attempted to repair the machinery. The hole was ad-vanced to 7 feet when drilling procedures stopped for the day at 4:00 PM.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004


REPORT NO.: 1A SW FIELD REP.: David O’Malley





RTD 12/16/11

Page 1 of 3


REPORT SUMBITTED TO: CONTRACTOR NAME AND CONTACT: WEATHER & TEMP.

Partly Cloudy, 43-63°, windy in PM City of




NO Lunch Taken




OWNER

1


Gregg drilling mobilized their Mobile B-57 drill and support equipment to the site and drilled at the boring B-7 location (estimated at approximately 210 feet from centerline of Wey-mouth, and about 10 feet west of centerline of Paseo Del Mar). The driller used a spade bit to core through the asphalt and into the surficial soils to about 4.5 feet deep to allow for the insertion of the core barrel into the borehole. The driller then used an HQ-3 coring system and advanced the borehole to about 67 feet deep of the planned 120 foot deep borehole. Used 4 core boxes brought by Gregg, and 1 core box from stockpile at other side of site.

PROJECT NO.: 51-1-10052-004







RTD 12/16/11

Page 2 of 3


PHOTOGRAPHS Photo 1.

Drilling at Bor-ing B-7 looking NW.

Photo 2.

Drilling at Bor-ing B-7 looking east.

PROJECT NO.: 51-1-10052-004







RTD 12/16/11

Page 3 of 3


SITE PLAN Site plan.

PROJECT NO.: 51-1-10052-004







Page 1 of 2






30 minute lunch taken




OWNER

1


Boart Longyear mobilized their Sonic core drilling and sup-port equipment to the site and drilled at the boring B-6 loca-tion (location shown on attached site plan). The driller sonic-coring equipment to drill the entire depth. Drilling began at 7:45 AM. At 11:30AM, at a depth of 77 feet, the driller switched to a cutter-barrel with Lexan sleeves. The crew tooka lunch break from 1:15PM to 1:45 PM. The hole was advanced to 110 feet when drilling procedures stopped for the day at 4:45 PM. The crew left the site at 5:30PM.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004


REPORT NO.: 4B SW FIELD REP.: Kartik Atyam/Chris Sexton





Page 1 of 3






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their CME-75 drill and support equipment to the site and drilled at the boring B-5 location (estimated at approximately 60 feet North from centerline of the landslide). The driller used a bucket auger to drill the entire depth. Samples were driven by the weight of the Kelly bars, at approximately 12-inch drop. The height of the drop was determined by the operator, by mechanical Cat-head mechanism. The hole was advanced from 40 feet to 80 feet when drilling procedures stopped. Chris Sexton, from Southwest Engineering, began down-hole logging, as shown in Photo 1. At this time standing water at the bottom of the hole was noted to be none to negligible. Down-hole logging procedures began at 10:30 AM and were completed at 1:30 PM. Roy Bros. continued drilling to 95 feet and completed drilling at 3:30 PM. Marcos Marin, from the City of Los Angeles, was on-site most of the day. Inclinometer casing was moved into fenced and locked area.

PROJECT NO.: 51-1-10052-004








PHOTOGRAPHS

Photo 1.

Chris Sexton begins down-hole logging.

Page 2 of 3

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 3 of 3

PROJECT NO.: 51-1-10052-004







Page 1 of 3






NO Lunch Taken




OWNER

1 Drilling at Boring B-7

Gregg drilling continued to drill at the B-7 boring location on Paseo Del Mar. The boring was advanced to about 117 feet deep. At about 113 feet deep, the formation took all of the circulation drill fluid. At 117 feet, the driller said that there was too much friction and that they would not be able to ad-vance the hole any farther without circulation fluid. The dril-ler said that they would have to advance casing to the bottom of the hole to continue drilling. I phoned Dean Francuch and he said to stop the hole at 117 feet and that Geovision would be out at about 1:30 pm to perform televiewer geophysics in the borehole. The driller said that they would pull their drill string when Geovision arrived.

2

Geovision per-formed optical tele-viewer scan of bore-hole

Rob Stellar with Geovision arrived at about 1:40 pm and Gregg Drilling removed their drill steel. Geovision performed an optical televiewer scan of the borehole from about 2:30pm to 3:40pm. Water was found in the borehole at about 106 feet deep. Geovision was able to scan the hole to about 116 feet deep. The results of the survey appeared good. Driller standby time from about 12:15 to 3:40. Used 4 core boxes brought by Gregg.

PROJECT NO.: 51-1-10052-004








PHOTOGRAPHS

Photo 1.


Photo 2.

Drilling at Bor-ing B-7 looking North.

Page 2 of 3

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 3 of 3

PROJECT NO.: 51-1-10052-004







Page 1 of 2






30 minute lunch taken




OWNER

1


Boart Longyear mobilized their Sonic core drilling and sup-port equipment to the site and drilled at the boring B-6 loca-tion (location shown on attached site plan). The driller ad-vanced 6-inch diameter casing to a depth of 110 feet. Well installation began at 10:30 AM. The crew took a lunch break from 2:00 PM to 2:30 PM. At 3:30 PM 11 feet of material was noted in the well casing. As a solution to the problem was be-ing determined, the crew defined a route to the other side of the landslide for their next boring. The crew left the site at 5PM.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004







Page 1 of 2






NO Lunch Taken




OWNER

1


Elias and Jose of Roy Bros. drilling mobilized their CME-75 drill and support equipment to the site and drilled at the boring B-5 location (estimated at approximately 60 feet North from centerline of the landslide). The driller used a bucket auger to drill the entire depth. The hole was advanced from 95 feet to 120 feet when drilling procedures stopped. Chris Sexton, from Southwest Engineering, began down-hole logging. At this time standing water at the bottom of the hole was noted to be at about 112 feet. Down-hole logging procedures began at 12:30 PM and were completed at 2:30 PM. Marcos Marin, from the City of Los Angeles, was on-site most of the day. Approximately 14 yd3 of gravel was brought to the site at 10:00AM. The driver was told that pea gravel was ordered and that gravel that was delivered was too angular. A 1-ton dump truck was also around the site. Chris Sexton, who was in correspondence with Dean Francuch, said the gravel in the back of that truck was acceptable. The driver of the large truck returned his stock and replaced it with more acceptable ma-terial, 1/4-inch to ½-inch sub-angular gravel. That gravel was dumped about 15 feet South of the borehole. Inclinometer and gravel is planned to be installed on Friday, December 16.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004







Page 1 of 3






NO Lunch Taken




OWNER


Driller worked on reaming the hole out to allow for the instal-lation of inclinometer casing and a vibrating wire piezometer. Driller started with the incorrect bit for the formation type, and while waiting for the correct bit to arrive at the site, used a smaller diameter bit to work on beginning to ream the hole. When the correct bit arrived, the driller attempted to use that bit to ream the hole, but was having problems advancing, so went back to using the smaller bit. At end of day, driller reached bottom of hole with smaller diameter bit, and will have to use larger bit tomorrow to finish reaming. Driller brought 3.34 inch O.D. inclinometer casing to site. I set up VWP in preparation for installation. I photographed core in core boxes.

PROJECT NO.: 51-1-10052-004








PHOTOGRAPHS

Photo 1.


Photo 2.


Page 2 of 3

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 3 of 3

PROJECT NO.: 51-1-10052-004







Page 1 of 2






NO Lunch Taken




OWNER

1


Boart Longyear mobilized their Sonic core drilling and sup-port equipment to the site and drilled at the boring B-6 loca-tion (location shown on attached site plan). The driller used a tremie pipe to wash the well casing with water. At 8:20 AM, the crew realized 11 feet of grout was inside the casing. From 8:30 AM to 10:45 AM, three well replenishment tests were completed. After conferring with Dean Francuch, with Shan-non and Wilson, a 6-inch diameter case was advanced over the well that was to be removed. From 11:45 AM to 1:45 PM, the crew worked to repair a broken hydraulic hose. The 6-inch diameter casing was installed to a depth of 90 feet and the well was fully removed by 5:15 PM with the aid of a spot-light. The crew left the site at 5:30 PM.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 2 of 2

PROJECT NO.: 51-1-10052-004







Page 1 of 3






NO Lunch Taken




OWNER


Driller worked on reaming the hole out to allow for the instal-lation of inclinometer casing and a vibrating wire piezometer. Driller used two different tri-cone button drill bits (about 4-inch diameter). Driller circulated bentonite slurry as a drilling fluid. After the driller thinned the bentonite slurry by pumping water to the bottom of the hole, the driller inserted a 120-foot long 3.34 inch O.D. inclinometer case into the hole. The A-axis is facing normal to the existing disturbed slope face about .8 feet below the top of the casing, which is protrudes about 3.5 feet above the ground surface. The driller mixed and pumped a concrete slurry to the bottom of the borehole and filled the hole. When the driller departed from the site the grout level decreased to about 3 feet below the ground surface. The driller said he will come back Mon-day to add more grout and a monument over the hole. Driller used: -10 storage drums -7 (47 lb) sacks of Portland cement - 2 (50 lb) sacks of quick gel bentonite - 1 drill bit

PROJECT NO.: 51-1-10052-004








PHOTOGRAPHS

Photo 1.


Photo 2.

Drilling at Bor-ing B-7 looking NW. View of inclinometer casing being installed.

Page 2 of 3

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 3 of 3

PROJECT NO.: 51-1-10052-004


REPORT NO.: 5C SW FIELD REP.: Cody K. Sorensen





Page 1 of 4


REPORT SUMBITTED TO: CONTRACTOR NAME AND CONTACT: WEATHER & TEMP. Sunny, 43-67° City of


Subcon-tractors Boart Longyear From 0645 hrs to 1815 hrs


Lunch Taken



FURTHER AC-TION RECOM-MENDED TO

OWNER

1


While onsite today Boart Longyear Drilling drilled out the pre-viously installed monitoring well (due to grout contamination of the sand filter) and advanced the 6-inch (Inside Diameter) ID cas-ing to a depth of 110 ft. The crew installed a new 2-inch ID PVC monitoring well to a depth of 106 ft and pulled their 6-inch ID casing from the ground. 39 bags of #2/12 filter sand, 3 bags of medium Bentonite chips, 5 bags of cement and 1 bag of Bento-nite gel were used to construct the monitoring well. The Boart crew mobilized the rubber track support rig and drill rig to the east side of the landslide and set up over boring B-8 (location “I_S” on the site plan). Boring B-8 was advanced and sampled to a depth of 18 ft using sonic rotary drilling technique. Below is a summary by time: 0645: onsite, Boart crew onsite, safety meeting 0715: drilling out previously installed piezo (removing cuttings from 6-inch casing) 0815: cleaned and advanced 6-inch casing to 110.0 ft, installing 2-inch ID piezometer and sand filter. 1107: bailing out water and sediment in casing with bailer, 2 ft of sediment remains, crew cleans out well casing using fresh water and tremie pipe 1145: placing medium bentonite chips for seal 1230: hydrating chips 1230-1330: hydrating bentonite chips and lunch break 1345: grouting well 1400: pulling 6-inch casing from borehole 1420: finished pulling casing, loading drill and support track rigs 1700: mobilized to location of boring B-8 and set up on hole, be-

PROJECT NO.: 51-1-10052-004







Page 2 of 4




FURTHER AC-TION RECOM-MENDED TO

OWNER

gin drilling B-8 1745: drilled to a depth of 18 ft, crew offsite.

PROJECT NO.: 51-1-10052-004








PHOTOGRAPHS

Photo 1.

Showing the previously installed slotted PVC and grout contaminated sand filter material removed to install the new monitoring well.

Page 3 of 4

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 4 of 4

PROJECT NO.: 51-1-10052-004







Page 1 of 3


REPORT SUMBITTED TO: CONTRACTOR NAME AND CONTACT: WEATHER & TEMP. Partly cloudy, 43-67° City of




Lunch Taken




OWNER

1


While onsite today Boart Longyear Drilling advanced and sampled borehole B-8 from a depth of 18 ft to 110 ft by sonic coring technique and advanced the 6-inch ID casing to a depth of 110 ft. The crew was shut down from 1505 to 1535 to re-place the drill rig’s rod clamp shoes. Below is a summary by time: 0630: onsite, transporting core boxes from the West side of the landslide to the east side of the landslide. 0700: Boart Longyear drill crew onsite, safety meeting 0810: advancing borehole B-8 using sonic rotary method starting from a depth of 18 ft 1050: crew switches sampling method from core runs into plastic bags to coring with a split barrel and Lexan sleeves, start Lexan sleeving samples at a depth of 78 feet 1215-1245: lunch break 1245: advancing borehole B-8 using sonic rotary method 1505-1535: crew shut down to replace drill rod clamp shoes 1630: advanced borehole B-8 to a depth of 110.0 ft, advancing 6-inch casing to 110.0 ft 1700: crew finishing well installation at borehole B-6, clean-ing up location of B-6 1830: drill crew offsite

PROJECT NO.: 51-1-10052-004








PHOTOGRAPHS

Photo 1.

Photo showing drill and support rig set up at loca-tion of B-8 (“I_S” on site plan).

Page 2 of 3

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 3 of 3

PROJECT NO.: 51-1-10052-004

REPORT DATE: Sunday, December 18, 2011






Page 1 of 3






Lunch Taken




OWNER

1


While onsite today Boart Longyear Drilling installed a 2-inch inside diameter monitoring well into borehole B-8. The pro-posed bottom of well was 105 ft however; while pulling up the 6-inch diameter borehole casing during filter sand place-ment the filter sand locked around the 2-inch PVC well casing and lifted the well casing up 4 ft. The crew pumped water in-to the 6-inch borehole casing to create a head of water and in-creased the casing vibration during casing removal to prevent lifting of the well casing. The bottom of the monitoring well was installed to a depth of 101 ft below ground surface. 33 bags of #2/12 filter sand, 4 bags of medium Bentonite chips, 1 bag of grout and 1 bag of Bentonite gel were used to construct the monitoring well. Below is a summary by time: 0730: onsite, Boart crew onsite 0745: safety meeting 0830: Boart crew cleaning out the 6-inch borehole casing with a 4-inch sonic core barrel and water bailer 0850: installing a 2-inch ID 2 5/8 inch OD, PVC monitoring well to a depth of 105 ft below ground surface 1050: while pulling up the 6-inch borehole casing the filter sand “locked” around the PVC well casing and lifted the well up 1.5 ft, water was added into the borehole casing 1110: filter sand continues to “lock” around PVC well casing during borehole casing extraction, lifted well up additional 2.5 ft, additional water added to borehole casing to create water head, borehole casing vibration increased during extraction, PVC well casing appears steady with bottom of well at 101 ft. 1245: adding medium Bentonite chips and water to borehole 1300-1330: lunch break while Bentonite chips hydrate

PROJECT NO.: 51-1-10052-004







Page 2 of 3





OWNER

1330: grouting the monitoring well, no observed seepage of grout into filter sand and well casing 1350: loading equipment and supplies onto trailers and pre-paring to mobilize offsite 1830: Boart crew offsite, one lowboy trailer with support track rig and forklift remain onsite for offsite removal tomor-row.

PROJECT NO.: 51-1-10052-004








SITE PLAN

Site plan.

Page 3 of 3

PROJECT NO.: 51-1-10052-004


REPORT NO.: 12 SW FIELD REP.: JXM





Page 1 of 2





Travel: 2 hours 75 miles

NO Lunch Taken




OWNER

1

Inclinometer Data Collection

I arrived on site today to measure slope movement in loca-tions B-1, B-5, B-7, and B-9 (Figure 1) using a Digitilt Incli-nometer, P/N 50302500, S/N 28699 and a Digitilt Datamate II. Others on site today included Dean Francuch, between 0700 and 1200, and Chris Sexton between 0700 and 1730. Inclinometer B-1 was previously monitored by Bill Nashem. Today, I recorded base line readings at all four locations. The readings were taken by matching the top edge of the metal feeder to the back edge of the colored bead (Photo 1). The top of the blue extension pipe, used at B-1, was level with the base of the metal feeder. I took three sets of readings, record-ing the A0 and A180 directions, at each location. Measure-ments were recorded every 2 feet between the depths as fol-lows:

• B-1: 128 to 4 feet • B-5: 120 to 4 feet • B-7: 116 to 4 feet • B-9: 114 to 4 feet

Recorded data will be post processed off site.

PROJECT NO.: 51-1-10052-004


REPORT NO.: 12 SW FIELD REP.: JXM






SITE PLAN

Figure 1.

Site plan show-ing inclinometer locations.

Photo 1.

Method of mea-surement for inclinometer data (showing blue extension pipe in use).

Page 2 of 2

Documents

APPENDIX A FIELD ACTIVITY REPORTS - Los Angeleseng2.lacity.org/whitepoint/Appendix A - Field Activity... · 2019-09-01 · Field Activity Report dated December 16, 2011 (4 pages)