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HomeMy WebLinkAboutSUP 2022-0001; OMNI LA COSTA GOLF COURSE RENOVATION; GEOTECHNICAL RESPONSE; 2022-10-10 Project No. T2754-22-04 October 10, 2022 LC Investments 2010, LLC d/b/a Omni La Costa Resort & Spa 4001 Maple Avenue, Suite 300 Dallas, Texas 75219 Attention: Mr. Clint Gulick Subject: GEOTECHNICAL RESPONSE GEOTECHNICAL REPORT REVIEW LETTER DATED SEPTEMBER 28, 2022 OMNI LA COSTA GOLF COURSE GRADING PERMIT NO. GR2022-0038, PROJECT ID: SUP2022-0001 CARLSBAD, CALIFORNIA References: 1. Geotechnical Report Review, Omni La Costa Golf Course (1st review) dated September 28, 2022, prepared by the City of Carlsbad. 2. Rough Grading Plan for Omni Resort Golf Course, Sheets 1 through 22, dated September 1, 2022, prepared by O’Day Consultants 3. Limited Geotechnical Investigation, Champions Course Renovations, Omni La Costa Resort & Spa, 2100 Costa Del Mar Road, Carlsbad, California, Project T2754- 22-04, dated April 15, 2021, prepared by Geocon West, Inc. Dear Mr. Gulick: This response letter has been prepared to provide geotechnical responses to report review questions presented in the City of Carlsbad Geotechnical Report Review letter dated September 28, 2022 (Reference1) with respect to the Limited Geotechnical Investigation report prepared by Geocon West, Inc. (Geocon) dated April 15, 2022 (Reference 3). This provides an item-by-item response to the review comments. Reference 1 is attached herein for ease of reference. Comment 1: Please review the most current grading plan for the project and provide any additional geotechnical recommendations or modifications to the geotechnical report, as necessary. Response 1: Geocon has reviewed the grading plans (Reference 2) which depict the proposed improvements to include: realignment of cart paths, filling of the pond in the northern portion of the Course; cuts and fills of 5 feet or less to level some areas of the site and to raise other areas; and construction of three cart path and foot bridges that will span 25 feet or less. Geocon has considered the final proposed improvements depicted on reference 2 with respect to the Limited Geotechnical Investigation report (Reference 3) and the expected improvements are generally similar to those proposed at the time of Reference 3 in 2021 with the exception that no retaining walls are proposed on the plans. Reference 3 remains applicable to the project unless superseded herein. GEOCON W E S T, I N C. GEOTECHNICA L ■ ENVIRONMENTAL ■ MATERIALS °' 41571 Corning Ploce, Suite l 01 ■ Murrieto, Colilornio 92562-7065 ■ Telephone 951.304.2300 ■ Fox 951 .304.2392 Geocon Project No. T2754-22-04 - 2 - October 10, 2022 Comment 2: Please provide a statement addressing the potential impact of the project on adjacent properties from a geotechnical standpoint. Response 2: The proposed improvements will be constructed within the existing golf course and do not pose a hazard to adjacent properties from a geotechnical standpoint. Comment 3: Please provide an updated “Boring Location Map” utilizing a reduced version of the grading plan for the project as a base map but at a sufficiently large scale to clearly show (at a minimum): a) the existing limits of the golf course, individual fairways, drainages, and water hazards, etc., and b) the locations of subsurface exploration. Please note that the “Boring Location map” presented in the submitted report consists of a Google aerial photograph of the site that is on an 8.5x11” sheet and is at a significantly small scale (approximately 1”=1230’) that results in difficulty showing the actual locations of the subsurface exploration with respect to the course. Please produce a map at a scale that is sufficiently large to clearly distinguish the fairways and other features of the golf course and show the specific locations of the borings on the golf course; a sheet larger than 8.5x11” will likely be necessary to increase the legibility and show all information. Response 3: We have utilized the referenced grading plans (Reference 2) Sheets 4 through 22 as a base map for our Geologic Map presented herein as Figures 1 through 19. This provides the information at a scale of approximately 1”=93’ when printed on 11 X 17 sheets. The grading plans depict the existing conditions and the proposed improvements. Comment 4: Please clarify the range in depth of the existing unsuitable fill and young alluvium for the areas of the proposed cart paths, bridges, and retaining wall. Response 4: The depth of fill over alluvium is presented on the Geologic Map next to each boring location for ease of reference. Generally, based on the boring data, a majority of the golf course has less than 3 feet of previously placed fill over alluvium. Deeper fill is expected within tee areas, bunker berms, and hills within the fairways. The improvements proposed for this project include the realignment of cart paths; the flattening of topography in some localized areas within the Champions Course to remove small hills and straighten the front of slopes along the perimeter of the course; and the construction of three 25 ft long cart path or foot bridges. The bridges are expected to be supported on spread footing foundations. No retaining walls are proposed or depicted on the plans. Geocon recommends that the fill and upper, unsuitable alluvium be removed to expose competent alluvium resulting in at least 2 feet of engineered fill beneath the new improvements. Please see section 7.5 in the referenced Limited Geotechnical Investigation report. Geocon Project No. T2754-22-04 - 3 - October 10, 2022 Comment 5: As the site is described as underlain by young alluvium and there is no consolidation testing reported, please provide the basis for the values of potential settlement (total and differential) for new structures and improvements that are provided in the report. Response 5: Planned improvements are lightly loaded structures (on the order of 1,500 psf maximum bearing pressure) with a minimum of 2 feet of compacted fill beneath small footings. Typical settlement evaluation was performed utilizing static settlement methods (Schmertmann). Since loading is light and footings are relatively small, the loads will mostly be supported within compacted fill. Only minor loads will be imposed on saturated clays at depth. Therefore, long term consolidation settlement evaluation was not considered necessary. Comment 6: The report indicates liquefaction may be a design consideration for the proposed bridges and the retaining wall associated with the project. Please further address and clarify the potential for liquefaction relative to the proposed project and provide recommendations to mitigate, as necessary. Response 6: There are no retaining walls planned for this project. Slopes at bridges are 2 to 5 feet high, bridges are single span, lightly loaded and not particularly settlement sensitive. Therefore, incorporation of liquefaction settlements or lateral movements are considered necessary. Following a large earthquake event, releveling may be required. Comment 7: Please clarify the foundation recommendations for the supports for the proposed bridges. Response 7: The three proposed bridges will be approximately 25-foot-long single spans and will be either prefabricated or cast in place founded on shallow spread footing foundations. Section 7.7 provides foundation recommendations. In addition, the following is recommended: Where bridge footings are located next to a descending 3:1 (horizontal:vertical) fill slope or steeper, the foundations should be extended to a depth where the bottom outside edge of the footing is at least 7 feet horizontally from the face of slope. Comment 8: Please provide horizontal setback distance from adjacent slopes for foundations associated with the proposed bridges and the retaining wall. Response 8: No retaining walls are proposed. The three bridges are proposed in areas where the topography is relatively flat with no significant slopes in proximity to the bridge locations. The streams which the bridges span are 2 to 5 feet deep with fairly steep slopes ranging from vertical to approximately 1;1 (h:v). The additional recommendation provided in Response No. 7 addresses slope setbacks.: : Geocon Project No. T2754-22-04 - 4 - October 10, 2022 Comment 9: Please address if creep load should be applied to the foundations for the proposed bridges located adjacent to sloping ground: provide lateral creep load, as necessary. Response 9 : Slopes are 2 to 5 feet, bridges are single span, lightly loaded and not particularly settlement sensitive. Therefore, evaluation and incorporation of creep loads are considered necessary. Comment 10: Please provide any recommendations to address the relative shallow groundwater with respect to the foundations for the proposed bridges or retaining wall, as necessary. Response 10: There are no retaining walls proposed for this project. Groundwater is shallow at the site and bridge foundation excavations could encounter groundwater. If encountered, groundwater should be pumped from the excavation and the excavation bottom stabilized if not firm and unyielding as with typical grading operations. Comment 11: Please clarify if reinforcing is recommended for all hardscape improvements due to the expansive soils and underlying young alluvium. Response 11: Per Section 7.8.1 of the referenced Limited Geotechnical Investigation report, Geocon recommends that concrete flatwork be reinforced with No. 3 bars placed 24 inches on center. Comment 12: As the results of Expansion Index testing presented in the report indicate a medium expansion potential (EI=74 to 78), please provide recommendations as necessary and a statement that the proposed foundation system/slabs-on-grade will meet the requirements of section 1808.6 of the 2019 California Building Code. As soils with expansion index (EI) over 20 are considered expansive and require mitigation in accordance with sections 1803.5.3 and 1808.6 of the 2019 CBC, please indicate the method of section 1808.6 (1808.6.1 through 1808.6.4) that is being recommended to satisfy the requirement and provide the Effective Plasticity Index and any other parameters for foundation design in accordance with WRI/CRSI Design of Slab-on-Ground floors, as necessary. Response 12: Since the expansive soils will not be removed, stabilization will be required. Stabilization will consist of removing existing expansive soils beneath footings, wetting (presaturating) and placing as compacted fill. No slabs-on-grade are proposed for this project. Comment 13: Soluble sulfate testing presented in the report indicates both moderate and severs [sic] sulfate exposure (S1 and S2). Consequently, please provide recommendations for sulfate resistant concrete (compressive strength, w/c ratio, type cement) consistent with the 2019 California Building Code and ACI 318, Tables 4.2.1 and 4.3.1 assuming “Severe” (S2) exposure class. Response 13: The Exposure Class with corresponding Cement Type, Water to Cement Ratio, and Minimum Compressive Strength are presented in Table 7.2.5 of the referenced Limited Geotechnical Investigation report. Geocon Project No. T2754-22-04 - 5 - October 10, 2022 Comment 14: Please provide the OSHA Type Soil (A, B, or C) and associated temporary slope inclination (H:V) that the construction plans and contractors should adhere to during the design and construction of the development. Response 14: Geocon presents recommendations for temporary excavations in Section 7.4 of Reference 3. The site soils should be considered as Class C with the addition of saturation. Conditions can vary within excavations and Geocon may not be present during all site work, therefore the contractor’s competent person should provide specific recommendations for excavation in accordance with OSHA requirements. Comment 15: Please provide a complete summary list of the geotechnical observation and testing services that should be performed as part of the construction of this proposed development. Response 15: Geocon should provide geotechnical testing and observation services during the grading operations, foundation construction, utility installation, retaining wall backfill and pavement installation. Table 1 presents the typical geotechnical observations we would expect for the proposed improvements. TABLE 1 EXPECTED GEOTECHNICAL TESTING AND OBSERVATION SERVICES Construction Phase Observations Expected Time Frame Ground Modification Ground Modification Installation Full Time Confirmation Testing Part Time to Full Time Grading Base of Removal Part Time During Removals Geologic Logging Part Time to Full Time Fill Placement and Soil Compaction Full Time Soldier Piles Solder Pile Drilling Depth Part Time Tieback Anchors Tieback Drilling and Installation Full Time Tieback Testing Full Time Soil Nail Walls Soil Nail Drilling and Installation Full Time Soil Nail Testing Full Time Foundations Foundation Excavation Observations Full Time Drilling Operations for Piles Part Time Utility Backfill Fill Placement and Soil Compaction Part Time to Full Time Retaining Wall Backfill Fill Placement and Soil Compaction Part Time to Full Time Subgrade for Sidewalks, Curb/Gutter and Pavement Soil Compaction Part Time Pavement Construction Base Placement and Compaction Part Time Asphalt Concrete Placement and Compaction Full Time Geocon Project No. T2754-22-04 - 6 - October 10, 2022 LIMITATIONS The recommendations of this report pertain only to the subject site and are based upon the assumption that the soil conditions do not deviate from those disclosed in this and Geocon’s 2021 report. If any variations or undesirable conditions are encountered during construction, or if the proposed construction will differ from that expected herein, Geocon West, Inc. should be notified so that supplemental recommendations can be given. The evaluation or identification of the potential presence of hazardous materials was not part of the scope of services provided by Geocon West, Inc. This report is issued with the understanding that it is the responsibility of the owner, or of their representative, to ensure that the information and recommendations contained herein are brought to the attention of the architect and engineer for the project and incorporated into the plans, and the necessary steps are taken to see that the contractor and subcontractors carry out such recommendations in the field. The findings of this report are valid as of the date of this report. However, changes in the conditions of a property can occur with the passage of time, whether they are due to natural processes or the works of man on this or adjacent properties. In addition, changes in applicable or appropriate standards may occur, whether they result from legislation or the broadening of knowledge. Accordingly, the findings of this report may be invalidated wholly or partially by changes outside our control. Therefore, this report is subject to review and should not be relied upon after a period of three years. The firm that performed the geotechnical investigation for the project should be retained to provide testing and observation services during construction to provide continuity of geotechnical interpretation and to check that the recommendations presented for geotechnical aspects of site development are incorporated during site grading, construction of improvements, and excavation of foundations. If another geotechnical firm is selected to perform the testing and observation services during construction operations, that firm should prepare a letter indicating their intent to assume the responsibilities of project Geotechnical Engineer of Record. A copy of the letter should be provided to the regulatory agency for their records. In addition, that firm should provide revised recommendations concerning the geotechnical aspects of the proposed development, or a written acknowledgement of their concurrence with the recommendations presented in our report. They should also perform additional analyses deemed necessary to assume the role of Geotechnical Engineer of Record. Geocon Project No. T2754-22-04 - 7 - October 10, 2022 If you have any questions regarding this report, or if we may be of further service, please contact the undersigned at your convenience. Very truly yours, GEOCON WEST, INC. Lisa A. Battiato CEG 2316 Joseph J. Vettel GE 2401 Attachments: Geotechnical Report Review dated September 28, 2022 Figures 1 through 19, Geologic Map Distribution: (pdf) Addressee (pdf) Mr. Keith Hansen, O’Day Consultants GEOTECHNICAL REPORT REVIEW __________________________________________________________ DATE: September 28, 2022 TO: City of Carlsbad Land Development Engineering 1635 Faraday Avenue Carlsbad, CA 92008 Attention: Emad Elias PROJECT ID: SUP2022-0001 GRADING PERMIT NO.: GR2022-0038 SUBJECT: Omni La Costa Golf Course (1st review) Items Submitted by Applicant Items Being Returned to Applicant  “Limited Geotechnical Investigation, Champions Course Renovations, Omni La Costa Resort & Spa, 2100 Costa del Mar Road, Carlsbad, California,” by Geocon West, Inc., dated April 15, 2021.  Written report review comments. Based on our review of the submitted geotechnical report, we are providing the following comments that should be addressed prior to the next submittal. Please provide complete and thorough written responses to all comments. GEOTECHNICAL COMMENTS: 1. Please review the most current grading plan for the project and provide any additional geotechnical recommendations or modifications to the geotechnical report as necessary. 2. Please provide a statement addressing the potential impact of the project on adjacent properties from a geotechnical standpoint. 3. Please provide an updated “Boring Location Map” map utilizing a reduced version of the grading plan for the project as the base map but at a sufficiently large scale to clearly show (at a minimum): a) the existing limits of the golf course, individual fairways, drainages and water hazards, etc., and b) the locations of subsurface exploration. Please note that the “Boring Location Map” presented in the submitted report consists of a Google aerial photograph of the site that is on an 8.5x11” sheet and is at a significantly small scale (approximately 1” = 1230’) that results in difficulty showing the actual locations of the GR2022-0038 September 28, 2022 Page 2 of 2 subsurface exploration with respect to the course. Please produce the map at a scale that is sufficiently large to clearly distinguish the fairways and other features of the golf course and show the specific locations of the borings on the golf course; a sheet larger than 8.5x11” will likely be necessary to increase legibility and show all information. 4. Please clarify the range in depth of the existing unsuitable fill and young alluvium for the areas of the proposed cart paths, bridges, and retaining wall. 5. As the site is described as underlain by young alluvium and there is no consolidation testing reported, please provide the basis for the values of potential settlement (total and differential) for new structures and improvements that are provided in the report. 6. The report indicates liquefaction may be a design consideration for the proposed bridges and retaining wall associated with the project. Please further address and clarify the potential for liquefaction relative to the proposed project and provide recommendations to mitigate as necessary. 7. Please clarify the foundation recommendations for the supports for the proposed bridges. 8. Please provide the horizontal setback distance from adjacent slopes for foundations associated with the proposed bridges and the retaining wall. 9. Please address if a creep load should be applied to the foundations for the proposed bridges located adjacent to sloping ground; provide the lateral creep load as necessary. 10. Please provide any recommendations to address the relative shallow groundwater with respect to the foundations for the proposed bridges or retaining wall as necessary. 11. Please clarify if reinforcing is recommended for all hardscape improvements due to the expansive soils and underlying young alluvium. 12. As the results of Expansion Index testing presented in the report indicate a medium expansion potential (EI=74 to 78), please provide recommendations as necessary and a statement that the proposed foundation system/slabs on-grade will meet the requirements of Section 1808.6 of the 2019 California Building Code. As soils with expansion index (EI) over 20 are considered expansive and require mitigation in accordance with Sections 1803.5.3 and 1808.6 of the 2019 CBC, please indicate the method of Section 1808.6 (1808.6.1 through 1808.6.4) that is being recommended to satisfy the requirement, and provide the Effective Plasticity Index and any other parameters for foundation design in accordance with WRI/CRSI Design of Slab-on-Ground floors as necessary. 13. Soluble sulfate testing presented in the report indicates both moderate and severs sulfate exposure (S1 and S2). Consequently, please provide recommendations for sulfate resistant concrete (compressive strength, w/c ratio, type cement) consistent with the 2019 California Building Code and ACI 318, Tables 4.2.1 and 4.3.1 assuming a “Severe” (S2) exposure class. 14. Please provide the OSHA Type Soil (A, B, or C) and associated temporary slope inclination (H:V) that the construction plans and contractors should adhere to during the design and construction of the development. 15. Please provide a complete summery list of the geotechnical observation/testing services that should be performed as part of the construction of this proposed development. PROJECT NO. T754-22-04 FIG. 1 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) :I ~, ! ~ [[ o· 10· 40' 5 20 SCALE: 1" = 40' ,,.... BO' _,,/' Dense ~ration / Gro'!fl<' Obscured ~/1/- 123.l 0 ~ J 0 --.. ...... ___ _ ' -110 Dense Vegetation J'-Ground Obsc,p!(f ) )'~ I 11s9 1111 ~ , 115.8 } GEOCON W E S T , I N C . LOT 27 MAP 14543 '18 11.?.6 GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 \ D EB D E9 D D _I_ PROJECT NO. T754-22-04 FIG. 2 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. B-7 ½ -5’ Qya (SM) 0 -½’ afu Qya ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) :\ :, ! ~ [ o· 10· 40' 5 20 SCALE: 1" : 40' 80' -f80- 184 \ _./ -~ ~nse Vegetation <fround Obscured 1/66 7 .., 1624 Cor 4 ~AP 145'43 / 1416 ----------------- ~-;!i; \ I I , ,,, ~~u ,,..,---- / ----- / 1398 / r I I 1141 f LDT 28 ,sr ,,_,rfa'"( ,,x,• ,' / /3L / I < l:.i,4 MAP 14984 7 - I r ~~~\' : , )\\ \ ~' \ \ \ :,, :~~~,..,.,,,.u; . / 1,,r ! 1 I I i ~ o\ P 12 GEOCON W E S T , I N C . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 D EB D E9 D D _I_ PROJECT NO. T754-22-04 FIG. 3 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. B-5 1-5’ Qya (SM) 0 -1 afu Qya ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. 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B-3 ½ -5’ Qya (SM) 0 -½’ afu Qya ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) I ! r o· 10· 40• 5 ~~ALE: 1" = 4ff w \ I • ) LDT 28 t, 124.1 .O AP 14984-'------I D EB ~5 I I ~17 ) i i /~ I I I I I C t I ~ I l I GEoc,q~ MATE IALS w E s T , AL ENVIRONME'::'.T~!:LIFORNIA 92562 GEOTECHNICPLACE #101, MURRIET , 41571 CORNING D EB D E9 D D _I_ PROJECT NO. T754-22-04 FIG. 5 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. 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GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 1 i o' 10' 40' D EB D E9 D D _I_ 5 20 BO' SCALE, 1 • = 40' PROJECT NO. T754-22-04 FIG. 6 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. 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T754-22-04 FIG. 7 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) 84.1 762 /, PROJECT EXJSUNCi / IJATER FEATURE \ I I I ( \ I I I • 766 \ . I 9' I I I "·~ ::-----.. ✓ ).-___ {_ __ _ ,,,,. -., I • 4, )·----, -", I I ' .., ' / I j' /I .., LDT 28 / MAP 14984 9 'AB ,,'¾--:#- / '-...;, I ' 'Y' \ ..........._. ~-~'-~ ---... ----...::::~--------..(' -.........:~ '- -------- '-____:::,,, SEE SHEET 11 ..., €8 ,,. ll I . I ..i...:...._ ....:::=:---'\ LOT 28 MAP 14,5 1 J V / ( LOT 6)ii·/ MAP )-4805 ,-,( I / APN 213-201-06 I I I L I' ◊◊ ( 0 \,'-~ 982 r f'-r o· 10· 5 20 J 40' SCALE: 1• = 40' GEOCON W E S T , I N C . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 D EB D E9 D D _I_ BO' PROJECT NO. T754-22-04 FIG. 8 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. B-6 1 -5’ Qya (SM) 0 –1’ afu Qya ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) ____, "' "' ~ I "' ;;; z a. « ~ _) J J J 1~ LOT 2 MAP 15719 " I ~~ <')" CV I'> N CV ...J II -...1 r1 gg ~g & " 0\ °' ,. ... .,;,, .... "'"' ........ .:s., LOT MAP 1 ' ',~/ '; ----.J l I ,,,-'--I --: I I I FS=88 1 ~ / 1 93 TING '--..,.._ }-... ..,: __ • PATH I I "---r '--- ~ BUNKER 'Jf"....._:_ '7. ...,.,, ...... --... (\ ' \ /I 1'"' ,-....._, \ / I \/ I r- ~1>...,--.0'; : \ fi8,8 ""'--1 ----i_ ""'~/4.. __ j_ ---~ ,,.--,-----f--- 41ii _, .. 69< -.., I cr UNK 708 l.,.j llJ ' I I I I ' 693 70.S fY I \ LDT 28 MAP 14984 611 7{J ----: I "\ ~\ I I , ---, _\_ S££ SH££T 12 /, / • I \ I ,,,__./ oltt, 1/ "-.......7_. ,t ---- I '-. .. '--t . • --zg ( BUNKER \ ,s,, .. ~ ... >J , LDT 28 MAP 14984 ,· ,. ---/ IAL -I ,,,, GEOCON W E S T , I N C . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 o· 10· 40' D EB D E9 D D _I_ 5 20 60' SCALE: 1' = 40' PROJECT NO. T754-22-04 FIG. 9 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) /. 9 * i:s '< ~ ~ "( .__, ~ ~ t 8 ' / I I I I I I I , 1,' I/ I I 6 ,---, I I • f 4TH TEEJ I I \ I , __ ., LDT 28 MAP 14984 , , : I I .., \ ~· I I ..,, I I I 1 "'1 I I I I .,; 66] 6 , I I l-,C' "'"' , .. .-~ Im '"{I I ., -I Wi Z j Oj N !<Ji., / ~i; -~--f-✓ fat& --· 0 ~ I 0 I ;'.? (\J -::: "'~ / I I I I <t: 2 . w LL ill ' I I ornse k¢~ 'imund Ob '~" /I ,, _, LOT 30 MAP 14543 LDT 28 MAP 14984 I I I I ,' I GEOCON W E S T , I N C . \ 0 ' . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 i O' 10' 40' D EB D E9 D D _I_ 5 20 BO' SCALE: 1" = 40' PROJECT NO. T754-22-04 FIG. 10 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) r g-; l L0~8 I '< AP 1 543 ~ 8.'5 :::s "" -..J !;;:! ;;;_l ~ CV'° "'"' tl "'"' ·~ ~~ ~~ 5;l 8'" ~fil1se Gr und ., 85A ~ APN 215-110-5 / ,.... / APN 215-110-60 ) <..., :_o/u,.c APN 215~61 I I I I I I I I I I APN 215-110-~7 I I ',, ', ---Dense Vegetat,oh------------ Ground Obscured --- / LOT 30 MAP 14543 LDT 28 MAP 14984 I I I APN 215-22~ APN 215-220-05 724 APN 215-220-58 GEOCON W E S T , I N C . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 i o' 10· 40' D EB D E9 D D _I_ 5 20 BO' SCALE: 1. = 40' PROJECT NO. T754-22-04 FIG. 11 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 ……GROUNDWATER ENCOUNTERED 3.5’ Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 B-7 1½ -5’ Qya (CL) 0 -1½’ afu Qya ……. GEOCON BORING LOCATION (2002) 3.5’ .....__ I I \' \"\ \ \ \ \ J I \/1:\ LDT 1 -•~t~~ ~MAP 14984 I -'--;,;~~--_-:-,.~:_-_-~-"'"'>~'°-:::="'.:::.c::;_..,!':,1/,. ; .::;-,- \ I I J I I / / / I I I ' I .,/ ' I.~--14 TEE ,/ (I I i / I I I ?'6' ,' I 4"l I I__ I S££ SH££T 15 ~ <-- Dense Vegetation Ground Obscured I \ I~- ) \ \ \ sos \ \ AP 15-220-58 / * 7l2 ·, ,{+ ., "'✓ ~ ~Q '6" " ~~J.:, ' ~ ' 57.1 I I I /,:1 \ \ \ I. I I I I ;4111 GEOCON W E S T , I N C . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 i O' 10' 40' D EB D E9 D D _I__ 5 20 BO' SCALE, I" = 40' PROJECT NO. T754-22-04 FIG. 12 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 B-7 2 ½ -16 ½ ’ Qya (SC & CL) 0 –2 ½’ afu Qya ……. GEOCON BORING LOCATION (2002) 8’ B-6 2 -16 ½ ’ Qya (CL) 0 –2 afu Qya3.5’ APN I 216-600-05 \ OJ f ~igfo ' iR :R "'\'' ~~, -_ ffi " d U , 64•51•1 u12· PVC SM/ 6 I _/ __ , __ 421 _y_ 41 D E9 ---..,_ _!_ ,--=----..,_ ---..,_ ---..,_ ---..,_ ---..,_ D LDT 1 MAP 14984 I ---..,_ ---..,_ ---..,_ ---..,_ ---..,_ -----: APN 215-220-22 GEOCON W E S T , I N C . GEOTECHNICAL ENVIRONME 41571 CORNING PLACE #101, MURRIET'::'.~~!:L.1~'i~l~R~~~; i o· JO' 40' 5 20 SCALE: I• = 40' D EB D E9 D D _I_ 80' PROJECT NO. T754-22-04 FIG. 13 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002)\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ APN 216-600-01 \ \ / \'&. \ \ l.- APN I' 216-600-o4 (:j ~ I ,J--..._ ' APr 216-600-03 I I I I EX 12" { PICSHI? I '-, _ __,, I~ ---,, '"'<: ', \/"' TEE 1;:lfi .. ~ I I I ,/~ ~ LOT 1 h y---'Tt'ft~~till.A.JJ'n"MAP 14984;:: ?' /, _/ :/ , I I CART PATH REPLACE AT GRADE ~I [ J A / -.I' A,, ) __, I I/ L GEOTECHN, I N C . 41571 CORNIN~~ALC, ENVIRONME E #101 NTAL , MURRIETA, CAL.l~ATERIALS ORNIA 92562 0' 10' 40' D EB D E9 D D _I_ 5 20 SCALE: 1 • = 40, 80' PROJECT NO. T754-22-04 FIG. 14 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 B-4 0 –16 ½ ’ Qya (CL) Qya ……. GEOCON BORING LOCATION (2002) 3.5’ \ / \ ) f I / 0 I 1 ,, j I I I \ \ LIMITS (EXISTING L PR□P□SED> I I i • . <t: I • I -.w 'z 10 iN I i <t: -~ ,w I Li_ I I I LDT 1 MAP 14984 \ I \ /\ \ .,,..---. • ;:. . ''{_ I ··-: = I ..,, \ \ \ - /: ,~ 1· \ ~ /1, '1 ,.: 1 I / / \ I , I -~' I I I I :._ I I • / I /.. I : ' ,I ~ .( I I', ..... I I \.-1 I I I ,"-I I I [ MAP 6941 APN 215-231-12 GEOCON W E S T , I N C . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 i O' 10' 40' D EB D E9 D D _I_ 5 20 80' SCALE, 1" = 40' PROJECT NO. T754-22-04 FIG. 15 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 B-7 0 –16 ½ ’ Qya (SM & CL) Qya ……. GEOCON BORING LOCATION (2002) 4’ 1-19 ½ ’ Qya (CL) 0 -1 afu Qya B-1 7.2’ 3'E '92,---- / ~ : I ; : I ,' 1ST TEE I ,' ;' _,,, .,f 1 \, It ' I \ \. ---t"\I ~(:~,, o, -~:!.., .... _ 19.3 ~, '---i Y1 ~~~ ... ----'----'"''~I"~ \ ~ 17.6 o'-',,,z'. ' ' \ LOT 1 MAP 14984 I\ I \ I I ' \ \,- \ \ \ 11 \ \ \ \ \ \ \ 16.S \ '. I \ \ \ \ \ \ \ \ \ BUNK \ \ \ \ \ \ \ 15.6 \ _____ j_ ___ --:ji~_f.__ __ \ \ \ ,\ \ Dense 'Vegetat.t· • 1 Groui Obscu GEOCON W E S T , I N C . 244 ~I NKER ~ . , h ~ I ' I 17 TEE \ :. -~---=-~~.;f GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 D EB D E9 D D _I_ PROJECT NO. T754-22-04 FIG. 16 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) l ! ~ ~ '10' 40' 20 80' '~LE: ,· = 40' u ___ .,. -- 21.5 ,-, ' '· ' ..... , ,... 10 -~---- ,...--(.. \ ,,.,,. _,,.,, l I ~6 \ \ 26.2 16.4 116 _,....,,, ..... __, C 25.6 25.3 ---L ____ t__ .. - -~ts--=17.5 - --~ ----_ -/- 17.8 _.. .. ,----,--, ,;r \ \ I }-. • I I I ,,:, C / I ,t.. I ~ ---·f ..... <?s .......... I I I ------t -~-==t :,,' --~-/ ~ -\- I ... I I I I //' 25.1 29.4 GEOCON W E S T , I N C . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 D EB D E9 D D _I_ PROJECT NO. T754-22-04 FIG. 17 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) -----~<, \ \k I I I I 16.5 I-- ,,.,,.,,.✓--- FS=,; 2 -----r----,-· • r----- 18 TEE ----- I I 164 I I I I I \ \ \ '\,, '~,,. ' '<' \ \ -,.-----,.----~\ ------r t,; 7.0Nt- 86 -') z.. 16.S 16.3 157 17.4 17.S 116 17.6 ----- ! ! ~ o· 10· 40' 5 20 80' SCALE: ,· = 4C' ~N ee·oe•40• ~-N ee•o9•o4,~ 243.36'> ~-~-~~32' ~-----..__ ..__ ..__ ..__ G , I N c EOTECH • 41571 CORNl~~~;C~~~lRONMENTAL M . MURRIETA, CALIFO A RIALS RNIA 92562 D EB D E9 ..__ D ..__ D _I_ PROJECT NO. T754-22-04 FIG. 18 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 B-2 1 ½ –16 ½ ’ Qya (SM & CL) Qya ……. GEOCON BORING LOCATION (2002) 4’ 1-19 ½ ’ Qya 0 -1 afu Qya B-2 8’ 0 –1 ½’ afu APN 216-590-01 ' ' I 22.8 125 i i • I I / 0/ /. / / / / / / / ..,_,,t_ L-. --~ -- 1().4 122 D E9 kJ 14.3 1/u \ ----1 \, r '\ I \I '\ D E9 D E9 --!-I ~.________,__ _ __. D ,.......<~..wi.... .......... ...._ 1/S 1/J 11.6 112 1_?.J 124 114 t lm1' MAP 1498 ----------13.1 Id 1?.6 .; 158 154 116 18.J 16.6 16.J \ ·'\" \ \ I \ ·"1 r--1 ( .. I D __I_ U2 142 Q.3 GEOCON W E S T , I N C . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 o· 10· 40• s 20 so· SCALE, 1" = 40' PROJECT NO. T754-22-04 FIG. 19 CHAMPIONS COURSE RENOVATIONSOMNI LA COSTA RESORT & SPA 2100 COSTA DEL MAR ROAD CARLSBAD, CALIFORNIA GEOLOGIC MAP HD OCTOBER 2022 Source: O’Day Consultants, Rough Grading Plan for Omni Resort Golf Course, prepared September 1, 2022. ……GROUNDWATER ENCOUNTERED 3.5’ GEOCON LEGEND Locations are approximate B-6 ……. GEOCON BORING LOCATION (2021) Qya .…. YOUNG ALLUVIAL DEPOSITS afu …...UNDOCUMENTED FILL B-8 ……. GEOCON BORING LOCATION (2002) \ -15- \ -\ \ \ --\ \ \ JlS \ 114 \ \. \ \ 175 ........_ <7 \ \ \ \ 12.:, \ \ / / \ \ \ \ / I \ \ .,.,. .-,·~·~ .-.,.,. _,,.· _.,.,. _.,.,. / / / / / / ,,- / I I / 116 14~ 18.4 __., \ ~'r! \" \ y \ 1 --""' _,\;,,""---/ ,;:-,.,~t k _..,.-, / / I I 161 I ·/ ~ l \ (✓~_,.. [......-,...,,,.--- ll6 / / / ,, ,,- / ,, / / 13.3 15.5 / / 22 ,, _/ / / 192 / Dense Vegetation Ground Obscured /1 48 ..,,,,- / ---- // L / ( 16.2 14.5 / ____,... / 169 U.5 ) 14.6 ) / 761 17~ 11., '-. -----' ' GEOCON W E S T , I N C . GEOTECHNICAL, ENVIRONMENTAL, MATERIALS 41571 CORNING PLACE #101, MURRIETA, CALIFORNIA 92562 -1 \ ~ o· 10' 40' 5 20 SCALE, 1• • 40' D EB D E9 D D _I_ 80'