The URL can be used to link to this page

Home My WebLink AboutXR2023-0403 - Misc;CDE; I.." x_lINSPECTtQP4.. 1-800-DL^'.t'TU) i Grissinger Altergott Report .of Special I spectior. cProicet Name & Ad& —Ss _.Cgstom_ Residence@/19,27.Port Cardiff, Newport Beach___, Permit Namber XR2023-0403 inspectionTypt(s) 6/�SedConcrete_... ......... _^_.. inspection Datc(s) ItJ Periodic ( X j C:oqunutas Observed placement of concrete (4000PS1) for (2) shoring piles per plan Pile size and placement in strict accordance with corresponding details and schedule Last Tests Made: ____4(4X8) cylinders cast Holliday ready mix#4C40L000 _ T otal 3nspmtion Timc, @: aci°, List ttcros Requ,ring, ("*ormction, include uncouec ted iterns previousiy dsgied Pile clearances achieved and maintained throughout. _.-.___-_- —-------- Piles supported at top. caissons clean and free -from standing water and other debris All concrete was placed and consolidated per specs and codes "---__. F n she best of city Kncwtedge, the Ork itlspected was in acm:o dance with ik e €iuiiding D'eparemenl approved design dr.vi rs, specification, and an(�Eicabfe wor! manshii provisions rS tre 1 '. except as noted aSour 6/23/2023 Date Print Full Na:n;=: `Thomas George __.. t'-_egistration NB-0617 R MCCARTHY CONSULTING, INC Field Memorandum Client: Fitzgerald c/o South Coast Architects, Inc. General Contractor: Grissinger Fine Homes Project Address: 1927 Port Cardiff Place, Newport Beach, CA Subject: Site observations for shoring and caissons Date: June 21, 2023 File No. 8636-10 Arrived on site this morning to observe drilling operations for the rear yard shoring and excavation at the request of the general contractor. The subcontractor (Altergott Construction), the drilling contractor (Drilco) and the general contractor were also on site. It was immediately apparent that the subcontractor had made vertical cuts along the rear of the property and that one caisson had been drilled to a depth of approximately 21 feet. The contractor indicated that groundwater was encountered at a depth of 15 to 16 feet. The vertical cuts along the rear property lines vary in height between four to five feet. The geotechnical report states that, temporary cuts of 1:1 (horizontal: vertical) above a 3- foot-high, single bench is expected be appropriate for trenching. Along property lines, cuts of 1:1 or flatter are typically prudent and are required by the City of Newport Beach. The material exposed in temporary excavations should be evaluated by the Contractor and Geotechnical Consultant during excavation and construction. The contractor should reestablish the slope area in accordance with the approved grade grading plans and geotechnical report. It was also noted and discussed that the shoring detail does not illustrate the lagging for the proposed excavation extending to the total depth of excavation on the grading plans. Shoring / lagging should be performed and installed to the total excavation depth in accordance with the geotechnical report. Our field geologist remained on site for observation and documentation of caisson drilling. Line and grade to be determined by others. Respectfully Submitted. R McCarthy Consulting, Inc. Stephan Cousineau, Staff Engineer 23 Corporate Plaza, Suite 150, Newport Beach, CA 92660 1599 Superior Avenue, Suite B-6, Costa Mesa, CA 92627 Phone 949 629 2539 1 Email info@rmccarthyconsulting.com R MCCARTHY CONSULTING. INC Field Memorandum Client: Fitzgerald Date: June 21, 2023 General Contractor: Grissinger Fine Homes File No. 8636-10 Project Address: 1927 Port Cardiff Place, Newport Beach, CA Subject: Site observation of rear shoring drilling Arrived on site this morning at the request of the general contractor (Grissinger) and the drilling contractor (Drilco) to observe and document the excavations for the proposed rear shoring at the subject site. The reference drawings are the Shoring/Retaining Wall Details and Notes plan prepared by ESI/FME Inc., dated January 5, 2023. The shoring plans call for a minimum solider pile embedment of 22 feet below the pad surface grade of 201.63 feet. The driller used a Soilmec STM-20 truck mounted drill rig with a 18 inch flight auger to excavate the proposed shoring pile borings. Drilling conditions were generally as anticipated with blackish grey sandy clay and tan brown clayey sand fill materials to depths of 15-16 feet below current adjacent surface grades over native terrace deposists consisting of olive grey silt. Significant groundwater was observed in the caisson shafts. After sitting open for more than an hour, pooled groundwater was observed at approximately 8 feet below below current adjacent surface grades in all open shoring pile excavations. 2-3 feet of caved material was observed in the borings after sitting open for more than 1 hour. The driller used an 18 inch bucket auger to clear the loose debris from the shoring pile excavations before placing steel in the borings. The following excavations were drilled to the required minimum depth/elevation today and, from a geotechnical standpoint, are suitable for placement of the steel cages and concrete. Surface Bottom of Minimum Depth Final Drilled Design Final Pile# Date Diameter Elevation Lagging Below Pad Sub Depth/ Embedment Embedment Drilled (in) (ft) Elev. (ft) Grade/Elev. (ft) Elev (10 Below Lag. (ft) Below Lag. (ft) SP-1 6-21-23 18 201.0 200.0 22.0/179.63 22.0/179.0 20.37 21.0 SP-4 6-21-23 18 201.0 200.0 22.0/179.63 22.5/178.5 20.37 21.5 SP-7 6-21-23 18 1 201.0 200.0 22.0/179.63 22.0/179.0 20.37 21.0 A tremie pipe should be used to displace the water in the shoring pile excavations while pouring concrete. This memorandum is not intended to verify cage length or steel reinforcement. Our services do not include verification of line and grade for the subject shoring piles or pad grades, which was checked by others. Table elevations are based on the contractor's surveys and staking. Respectfully Submitted, R McCarthy Consulting, Inc. Griffin McMullen Staff Geologist 23 Corporate Plaza, Suite 150, Newport Beach, CA 92660 Phone 949 629 2539 1 Email info@rmccarthyconsulting.com R MCCARTHY CONSULTING, INC Field Memorandum Client: Fitzgerald Date: June 22, 2023 General Contractor: Grissinger Fine Homes File No. 8636-10 Project Address: 1927 Port Cardiff Place, Newport Beach, CA Subject: Site observation of rear shoring drilling Arrived on site this morning at the request of the general contractor (Grissinger) and the drilling contractor (Drilco) to observe and document the excavations for the proposed rear shoring at the subject site. The reference drawings are the Shoring/Retaining Wall Details and Notes plan prepared by ESI/FME Inc., dated January 5, 2023. The shoring plans call for a minimum solider pile embedment of 22 feet below the pad surface grade of 201.63 feet. The driller used a Soilmec STM-20 truck mounted drill rig with a 18 inch flight auger to excavate the proposed shoring pile borings. Drilling conditions were generally as anticipated with blackish grey sandy clay and tan brown clayey sand fill materials to depths of 13-15 feet below current adjacent surface grades over native terrace deposits consisting of olive grey silt. Significant groundwater was observed in the caisson shafts. After sitting open for more than an hour, pooled groundwater was observed at approximately 8 feet below below current adjacent surface grades in all open shoring pile excavations. 2-3 feet of caved material was observed in the borings SP 2 and 5 after sitting open for more than 1 hour. The driller used an 18 inch bucket auger to clear the loose debris from the shoring pile excavations before placing steel in the borings. The driller began excavating the boring for SP-8 in the approximate center of the rear lot. Soils were observed to consist of a dark grey sandy clay in the upper 14 feet. Significant caving and seepage was observed at a depth of approximately 8-15 feet. After sitting open for 5 to 10 minutes, large portions of the sides of the excavation from 8-15 feet were observed to cave into the boring. The driller attempted to pull two more passes with the flight auger and soil was observed to continue to cave and leveled out at approximately 10 feet below surface. Drilling operations were ceased on the boring for shoring pile SP 8 until additional tools can be brought the site to stabilize the boring. The following excavations were drilled to the required minimum depth/elevation today and, from a geotechnical standpoint, are suitable for placement of the steel cages and concrete. Surface Bottom of Minimum Depth Final Drilled Design Final Piled Date Diameter Elevation Lagging Below Pad Sub Depth/ Embedment Embedment Drilled (in) (ft) Elev. (ft) Grade/Elev. (ft) Elev (ft) Below Lag. (ft) Below Lag. (ft) SP-2 6-22-23 18 201.0 200.0 22.0/179.63 22.51178.5 20.37 21.5 SP-5 6-22-23 18 201.0 200.0 22.0/179.63 22.0/179.0 20.37 21.0 A tremie pipe should be used to displace the water in the shoring pile excavations while pouring concrete. This memorandum is not intended to verify cage length or steel reinforcement. Our services do not include verification of line and grade for the subject shoring piles or pad grades, which was checked by others. Table elevations are based on the contractor's surveys and staking. Respectfully Submitted, R McCarthy Consulting, Inc. Griffin McMullen Staff Geologist 23 Corporate Plaza, Suite 150, Newport Beach, CA 92660 Phone 949 629 2539 1 Email info@rmccarthyconsulting.com R M C CARTHY CONSULTING, INC Field Memorandum Client: Fitzgerald Date: June 23, 2023 General Contractor: Grissinger Fine Homes File No. 8636-10 Project Address: 1927 Port Cardiff Place, Newport Beach, CA Subject: Site observation of rear shoring drilling Arrived on site this morning at the request of the general contractor (Grissinger) and the drilling contractor (Drilco) to observe and document the excavations for the proposed rear shoring at the subject site. The reference drawings are the Shoring/Retaining Wall Details and Notes plan prepared by ESI/FME Inc., dated January 5, 2023. The shoring plans call for a minimum solider pile embedment of 22 feet below the pad surface grade of 201.63 feet. The driller used a Soilmec STM-20 truck mounted drill rig with a 18 inch flight auger to excavate the proposed shoring pile borings. Drilling conditions were generally as anticipated with blackish grey sandy clay and tan brown clayey sand fill materials to depths of 14-15 feet below current adjacent surface grades over native terrace deposits consisting of olive grey silt. Significant groundwater was observed in the caisson shafts. After sitting open for more than an hour, pooled groundwater was observed at approximately 8 feet below below current adjacent surface grades in all open shoring pile excavations. 2-3 feet of caved material was observed in the borings SP 3 and 6 after sitting open for more than 1 hour. The driller used an 18 inch bucket auger to clear the loose debris from the shoring pile excavations before placing steel in the borings. The driller began excavating the boring for SP-12 in the approximate southeast corner of the lot. Soils were observed to consist of a wet blackish grey clayey silt in the upper 10 feet. Significant caving and seepage was observed at a depth of approximately 6-10 feet. Liquified clayey silt material was observed to pour into the boring from the sides of the excavation from approximately 6-10 feet after the flight auger made a pass of removing material from the boring. Drilling operations were ceased on the boring for shoring pile SP 12 until additional tools can be brought the site to stabilize the boring. The following excavations were drilled to the required minimum depth/elevation today and, from a geotechnical standpoint, are suitable for placement of the steel cages and concrete. Surface Bottom of Minimum Depth Final Drilled Design Final Pile# Date Diameter Elevation Lagging Below Pad Sub Depth/ Embedment Embedment Drilled (in) 01) Elev. (it) Grade/Elev. (ft) Elev (ft) Below Lag. (£t) Below Lag. (ft) 5P-3 6-23-23 18 201.0 200.0 22.0/179.63 22.5/178.5 20.37 21.5 SP-6 6-23-23 18 201.0 200.0 22.0/179.63 22.0/179.0 20.37 21.0 A tremie pipe should be used to displace the water in the shoring pile excavations while pouring concrete. This memorandum is not intended to verify cage length or steel reinforcement. The drilling contractor plans to bring a 20 foot long by approximately 20 inch diameter metal casing to the site on Monday to help stabilize the borings. Our services do not include verification of line and grade for the subject shoring piles or pad grades, which was checked by others. Table elevations are based on the contractor's surveys and staking. Respectfully Submitted, R McCarthy Consulting, Inc. Griffin McMullen Staff Geologist 23 Corporate Plaza, Suite 150, Newport Beach, CA 92660 Phone 949 629 2539 1 Email info@rmccarthyconsulting.com R M C CARTHY CONSULTING, INC Field Memorandum Client: Fitzgerald Date: June 26, 2023 General Contractor: Grissinger Fine Homes File No. 8636-10 Project Address: 1927 Port Cardiff Place, Newport Beach, CA Subject: Site observation of rear shoring drilling Arrived on site this morning at the request of the general contractor (Grissinger) and the drilling contractor (Drilco) to observe and document the excavations for the proposed rear shoring at the subject site. The reference drawings are the Shoring/Retaining Wall Details and Notes plan prepared by ESI/FME Inc., dated January 5, 2023. The shoring plans call for a minimum solider pile embedment of 22 feet below the pad surface grade of 201.63 feet. The driller used a Soilmec STM-20 truck mounted drill rig with a 18 inch flight auger to excavate the proposed shoring pile borings. Drilling conditions were generally as anticipated with blackish grey sandy clay and tan brown clayey sand fill materials to depths of 13-14 feet below current adjacent surface grades over native terrace deposits consisting of olive grey silt. Significant groundwater was observed in the caisson shafts. After sitting open for more than an hour, pooled groundwater was observed at approximately 8 feet below below current adjacent surface grades in all open shoring pile excavations. 2-3 feet of caved material was observed in the borings SP-11 after sitting open for more than 1 hour. The driller used an 18 inch bucket auger to clear the loose debris from the shoring pile excavation before placing steel in the boring. The driller then began to redrill the boring for SP-8 in the approximate middle of the lot. Significant caving and seepage was previously observed at a depth of approximately 8-15 feet with caving leveling out at approximately 10 feet below surface. The driller made a pass with the flight auger, bringing the boring to approximately 12 feet below surface and then placed a 15 foot long by 20 inch diameter casing in the boring. The driller used an 18 inch bucket auger to continue drilling the boring and used the drill rig arm to press the casing further into the boring. The driller reached the approximate minimum tip elevation for boring SP-8 with approximately 3 feet of the casing above surface grades. Seepage was observed in the lower approximate 10 feet of the boring. The driller plans to keep the casing in place over night and clear loose debris from the boring before placing steel and pouring concrete tomorrow. The following excavations were drilled to the required minimum depth/elevation today and, from a geotechnical standpoint, are suitable for placement of the steel cs es and concrete. Surface Bottom of Minimum Depth Final Drilled Design Final Pile# Date Diameter Elevation Lagging Below Pad Sib Depth/ Embedment Embedment Drilled (in) Elev. (ft) Grade/Elev. f Elev f Below Lag. (ft) Below Lag. (ft) SP-11 6-26-23 18 201.0 200.0 22.0/179.63 22.5/178.5 20.37 21.5 A tremie pipe should be used to displace the water in the shoring pile excavations while pouring concrete. This memorandum is not intended to verify cage length or steel reinforcement. Our services do not include verification of line and grade for the subject shoring piles or pad grades, which was checked by others. Table elevations are based on the contractor's surveys and staking. Respectfully Submitted, R McCarthy Consulting, Inc. Griffin McMullen Staff Geologist 23 Corporate Plaza, Suite 150, Newport Beach, CA 92660 Phone 949 629 2539 1 Email info@rmccarthyconsulting.com FR MCCARTHY CONSULTING, INC Field Memorandum Client: Fitzgerald Date: June 27, 2023 General Contractor: Grissinger Fine Homes File No: 8636-10 Project Address: 1927 Port Cardiff Place, Newport Beach, CA Subject: Site observation of rear shoring drilling and lagging Arrived on site this morning at the request of the general contractor (Grissinger) and the drilling contractor (Drilco) to observe and document the excavations for the proposed rear shoring at the subject site. The reference drawings are the Shoring/Retaining Wall Details and Notes plan prepared by ESI/FME Inc., dated January 5, 2023. The shoring plans call for a minimum solider pile embedment of 22 feet below the pad surface grade of 201.63 feet. The driller used a Soilmec STM-20 truck mounted drill rig with a 18 inch flight auger to excavate the proposed caisson borings. Drilling conditions were generally as anticipated with blackish grey sandy clay and tan brown clayey sand fill materials to depths of 13-14 feet below current adjacent surface grades over native terrace deposits consisting of olive grey silt. Goundwater was observed in the caisson shafts, generally below the depth of the fill materials. SP-10 was drilled to total depth without the need for surface casing. Wet cuttings were observed at a depth of about 15 feet during drilling. Previously drilled caisson borehole SP-8 had about 4 feet of loose debris in the bottom of the borehole with the groundwater level at a depth of about 10 feet. The borehole was cleaned out with the auger to total depth prior to placing the pile. When SP-12 had been drilled to a depth of about 10 feet, the borehole caved to a depth of about 7 feet. Therefore, surface casing was utilized to reinforce the caving zone. The surface casing was 15 feet long and 20-inch diameter. The casing was placed such that the bottom was at a depth of approximately 11 feet below the pad grade. Drilling then continued at SP-12 to a depth of 16 feet at the end of the day at which time groundwater accumulation in the hole was minimal due to the drilling to remove the wet cuttings. Drilling of SP-12 is planned to resume tomorrow followed by placement of steel and concrete. The following excavations were drilled to the required minimum depth/elevation today and, from a geotechnical standpoint, are suitable for placement of the steel piles and concrete. Minimum Bottom Depth Final Design Final Date Diameter Surface of Below Pad Drilled Embedment Embedment Pile p Elevation Drilled (in) Lagging Sub Depth/ Below Below (ft) Elev. (ft) Grade/Elev. Elev. (ft) Lagging (ft) Lagging (ft) (ft) SP 8 6-26 & 27- 18 201.0 200.0 22.0/179.63 22.5/178.5 20.37 21.5 2023 SP-10 6-27-2023 18 201.0 200.0 22.0/179.63 22.5/178.5 20.37 21.5 A tremie pipe should be used to displace the water in the caisson excavations while pouring concrete. This memorandum is not intended to verify pile length or steel reinforcement. Additionally, 5 lagging boards were placed within each bay between SP-2 and SP-7 and 4 lagging boards were placed within the bay between SP-1 and SP-2. Our services do not include verification of line and grade for the subject shoring piles or pad grades, which was checked by others. Table elevations are based on the contractor's surveys and staking. Respectfully Submitted, / R McCarthy Consulting, Ina �C k Katherine Dickinson a +� �+—• Staff Geologist 23 Corporate Plaza, Suite 150, Newport Beach, CA 92660 Phone 949 629 2539 1 Email info5rmccarthyconsu)tin g.com R MCCARTHY CONSULTING, INC Field Memorandum Client: Fitzoerald Date: June 28, 2023 General Contractor: Grissinoer Fine Homes File No. 8636-10 Project Address: 1927 Port Cardiff Place, Newport Beach, CA Subject: Site observation of rear shoring drilling Arrived on site this morning at the request of the general contractor (Grissinger) and the drilling contractor (Drilco) to observe and document the excavations for the proposed rear shoring at the subject site. The reference drawings are the Shoring/Retaining Wall Details and Notes plan prepared by ESI/FME Inc., dated January 5, 2023. The shoring plans call for a minimum solider pile embedment of 22 feet below the pad surface grade of 201.63 feet. The driller used a Soilmec STM-20 truck mounted drill rig with a 18 inch flight auger to excavate the proposed shoring pile borings. Drilling conditions were generally as anticipated with blackish grey sandy clay and tan brown clayey sand fill materials to depths of 13-14 feet below current adjacent surface grades over native terrace deposits consisting of olive grey silt. Significant groundwater was observed in the caisson shafts. After sitting open for more than an hour, pooled groundwater was observed at approximately 8 feet below below current adjacent surface grades in all open shoring pile excavations. 2-3 feet of caved material was observed in the borings SP-9 after sitting open for more than i hour. The driller used an 18 inch bucket auger to clear the loose debris from the shoring pile excavation before placing steel in the boring. The driller previously began to redrill the boring for SP-12 in the approximate southeast side of the lot. Significant caving and seepage was previously observed at a depth of approximately 6-10 feet and the boring was backfilled to the approimate surface. Yesterday, the driller brought the boring to approximately 10 feet below surface and then placed a 15 foot long by 20 inch diameter casing in the boring. The driller used the flight auger this afternoon to continue the boring. The driller reached the approximate minimum tip elevation for boring SP-12 with approximately 3 feet of the casing above surface grades. Seepage was observed in the lower approximate 10 feet of the boring. The following excavations were drilled to the required minimum depth/ elevation today and, from a geotechnical standpoint, are suitable for placement of the steel cages and concrete. Surface Bottom of Minimum Depth Final Drilled Design Final Pile# Date Diameter Elevation Lagging Below Pad Sub Depth/ Embedment Embedment Drilled (in) (ft) Elev. (ft) Grade/Elev. (ft) Elev (ft) Below Lag. (ft) Below Lag. (ft) SP-9 6-28-23 18 201.0 200.0 22.0/179.63 23.0/178.0 20.37 22.0 SP-12 6-28-23 18 201.0 200.0 22.0/179.63 22.0/179.0 20.37 21.0 A tremie pipe should be used to displace the water in the shoring pile excavations while pouring concrete. This memorandum is not intended to verify cage length or steel reinforcement. Our services do not include verification of line and grade for the subject shoring piles or pad grades, which was checked by others. Table elevations are based on the contractor's surveys and staking. Respectfully Submitted, R McCarthy Consulting, Inc. Griffin McMullen Staff Geologist 23 Corporate Plaza, Suite 150, Newport Beach, CA 92660 Phone 949 629 2539 1 Email info@rmccarthyconsulting.com 3000pal MIN CCNCREI WALL(SHOTCRETE OR POUREP-IN-PLACE) n15 SOLDIER PILE* X„ CLK I MR 1*?ROP. LINE F IT-7- G PA up 1924 'P- CAKVIf x 4x LAC-GING a xl- ., PILL VOID WITH SLURRY Q E 0 —APPROVED 10 WATERPROOPIWI BEAND WALL —MIRADRAIN '..i a OR EQUAL an I A a I a Z3 �5��"►�, iN IS" o CAISSON 9 63' o/c AT AREA "A" UN.O. _ -8' o/c AT AREA S" URO. CONSULTING, INC Field Memorandum Client: Fitzgerald c/o South Coast Architects, Inc. General Contractor: Grissinger Fine Homes Project Address: 1927 Port Cardiff Place, Newport Beach, CA Subject: Site observations for pool bottom excavation Date: July 28, 2023 File No. 8636-10 Arrived on sitetodayat noon to observe the pool bottom excavation at the request of the general contractor. The subcontractor had excavated for the pool in the right rear corner of the property. The excavation extended approximately 5 to 6 feet below the adjacent grade into the recently constructed engineered fill. The contractors were in the process of excavating for the proposed drain line across the pool. The fills observed in the pool bottom consisted of reddish brown cement treated clayey sands. The fills were also observed to be firm and moist, yielding less than 1 inch when probed under weight. Based upon our observations and testing, it is our opinion that, from a geotechnical standpoint, the pool excavation is considered suitable for the installation of steel reinforcement and concrete. Line and grade to be determined by others. Respectfully Submitted, R. McCarthy Consulting, Inc. Stephan Cousineau, Staff Engineer 23 Corporate Plaza, Suite 150, Newport Beach, CA 92660 1599 Superior Avenue, Suite B-6, Costa Mesa, CA 92627 Phone 949 629 2539 1 Email info@rmccarthyconsulting.com R MCCARTHY CONSULTING, INC Field Memorandum Client: Fitzgerald Date: June 27, 2023 General Contractor: Grissinger Fine Homes File No: 8636-10 Project Address: 1927 Port Cardiff Place, Newport Beach, CA Subject: Site observation of rear shoring drilling and lagging Arrived on site this morning at the request of the general contractor (Grissinger) and the drilling contractor (Drilco) to observe and document the excavations for the proposed rear shoring at the subject site. The reference drawings are the Shoring/Retaining Wall Details and Notes plan prepared by ESI/FME Inc., dated January 5, 2023. The shoring plans call for a minimum solider pile embedment of 22 feet below the pad surface grade of 201.63 feet. The driller used a Soilmec STM-20 truck mounted drill rig with a 18 inch flight auger to excavate the proposed caisson borings. . Drilling conditions were generally as anticipated with blackish grey sandy clay and tan brown clayey sand fill materials to depths of 13-14 feet below current adjacent surface grades over native terrace deposits consisting of olive grey silt. Goundwater was observed in the caisson shafts, generally below the depth of the fill materials. SP-10 was drilled to total depth without the need for surface casing. Wet cuttings were observed at a depth of about 15 feet during drilling. Previously drilled caisson borehole SP-8 had about 4 feet of loose debris in the bottom of the borehole with the groundwater level at a depth of about 10 feet. The borehole was cleaned out with the auger to total depth prior to placing the pile. When SP-12 had been drilled to a depth of about 10 feet, the borehole caved to a depth of about 7 feet. Therefore, surface casing was utilized to reinforce the caving zone. The surface casing was 15 feet long and 20-inch diameter. The casing was placed such that the bottom was at a depth of approximately 11 feet below the pad grade. Drilling then continued at SP-12 to a depth of 16 feet at the end of the day at which time groundwater accumulation in the hole was minimal due to the drilling to remove the wet cuttings. Drilling of SP-12 is planned to resume tomorrow followed by placement of steel and concrete. The following excavations were drilled to the required minimum depth/elevation today and, from a geotechnical standpoint, are suitable for placement of the steel piles and concrete. Minimum Bottom Depth Final Design Final Surface Date Diameter of Below Pad Drilled Embedment Embedment Pile # Drilled (in) Elevation Lagging Sub Depth/ Below Below (ft) Elev. (ft) Grade/Elev. Elev. (ft) Lagging (ft) Lagging (ft) (ft) SP 8 6-26 & 27- 18 201.0 200.0 22.0/179.63 22.5/178.5 20.37 21.5 2023 SP-10 6-27-2023 18 201.0 200.0 1 22.0/179.63 22.5/178.5 20.37 21.5 A tremie pipe should be used to displace the water in the caisson excavations while pouring concrete. This memorandum is not intended t0 verify pile length or steel reinforcement. Additionally, 5 lagging boards were placed within each bay between SP-2 and SP-7 and 4 lagging boards were placed within the bay between SP-1 and SP-2. Our services do not include verification of line and grade for the subject shoring piles or pad grades, which was checked by others. Table elevations are based on the contractor's surveys and staking. Respectfully Submitted, R McCarthy Consulting, Inc. C Katherine Dickinson Staff Geologist 23 Corporate Plaza, Suite 150, Newport Beach, CA 92660 Phone 949 629 2539 1 Email info@rmccarthvconsultino.com