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TECHNICAL SPECIFICATION PER GEOTECHNICAL REPORT BY TERRACON ■ CHEMICAL STABILIZATION - IMPROVEMENT OF SUBGRADES WITH QUICKLIME COULD BE CONSIDERED FOR IMPROVING UNSTABLE SOILS. EXTENDS AT LEAST 5 FEET FROM THE FACE OF THE BUILDINGS' EXTERIORS. THE PLUG MATERIAL SHOULD CONSIST OF CEMENTITIOUS
<br /> CHEMICAL STABILIZATION SHOULD BE PERFORMED BY A PRE-QUALIFIED CONTRACTOR HAVING EXPERIENCE WITH SUCCESSFULLY FLOWABLE FILL OR LOW PERMEABILITY CLAY. THE TRENCH PLUG MATERIAL SHOULD BE PLACED TO SURROUND THE UTILITY LINE. IF USED,
<br /> DATED JANUARY 16, 2025 (PROJECT N0. NA245139)
<br /> STABILIZING SUBGRADES IN THE PROJECT AREA ON SIMILAR SIZED PROJECTS WITH SIMILAR SOIL CONDITIONS. THE HAZARDS OF THE CLAY TRENCH PLUG MATERIALSHOULD BE PLACED AND COMPACTED TO COMPLY WITH THE WATER CONTENT AND COMPACTION
<br /> CHEMICALS BLOWING ACROSS THE SITE OR ONTO ADJACENT PROPERTY SHOULD ALSO BE CONSIDERED. ADDITIONAL TESTING WOULD BE RECOMMENDATIONS FOR STRUCTURAL FILL STATED PREVIOUSLY IN THIS REPORT.
<br /> EARTHWORK NEEDED TO DEVELOP SPECIFIC RECOMMENDATIONS TO IMPROVE SUBGRADE STABILITY BY BLENDING
<br /> WE HAVE ASSUMED GRADING WILL CONSIST OF CUTS AND FILLS ON THE ORDER OF 2 FEET OR LESS AND THAT SITE GRADES WILL BE CHEMICALS WITH THE SITE SOILS. ADDITIONAL TESTING COULD INCLUDE, BUT NOT BE LIMITED TO, DETERMINING THE MOST SUITABLE IF CHEMICAL TREATMENT OF SUBGRADE SOILS OCCURS BEFORE UTILITY CONSTRUCTION, CONTROLLED LOW STRENGTH MATERIAL (CLSM) OR
<br /> WITHIN 2 FEET OF EXISTING GRADES. SPECIFIC SITE GRADING INFORMATION WAS UNAVAILABLE AT THE TIME THIS REPORT WAS PREPARED. STABILIZING AGENT, THE OPTIMUM AMOUNTS REQUIRED, AND THE PRESENCE OF SULFATES IN THE SOIL. IF THIS METHOD IS CHOSEN TO SAND CEMENT SLURRY SHOULD BE USED AS BACKFILL MATERIAL TO CAP UTILITY TRENCHES IN ALL AREAS WHERE TRENCHES HAVE CUT
<br /> IF ELEVATION AND SITE GRADING DIFFER FROM OUR STATED ASSUMPTIONS, TERRACON SHOULD BE CONTACTED TO DETERMINE IF ADDITIONAL STABILIZE SUBGRADE SOILS THE ACTUAL AMOUNT OF HIGH CALCIUM QUICKLIME TO BE USED SHOULD BE DETERMINED BY TERRACON AND THROUGH THE TREATED SUBGRADE. THE THICKNESS OF THE CLSM OR SLURRY SHOULD BE AT LEAST THE THICKNESS OR DEPTH OF
<br /> EARTHWORK RECOMMENDATIONS ARE WARRANTED. EARTHWORK IS ANTICIPATED TO INCLUDE DEMOLITION, CLEARING AND GRUBBING, EXCAVATIONS, AND BY LABORATORY TESTING AT LEAST TWO WEEKS PRIOR TO THE START OF GRADING OPERATIONS. CHEMICALLY TREATED SUBGRADE. BELOW THAT DEPTH, IMPORTED STRUCTURAL FILL OR MOISTURE CONDITIONED NATIVE CLAY MAY BE
<br /> ENGINEERED FILL PLACEMENT. THE FOLLOWING SECTIONS PROVIDE RECOMMENDATIONS FOR USE IN THE PREPARATION OF SPECIFICATIONS FOR THE USED FOR BACKFILL. SUCH AREAS TRENCHED THROUGH CHEMICALLY TREATED SOIL SHOULD NOT BE BACKFILLED WITH AGGREGATE BASE,
<br /> WORK. RECOMMENDATIONS INCLUDE CRITICAL QUALITY CRITERIA, AS NECESSARY, TO RENDER THE SITE IN THE STATE CONSIDERED IN OUR FURTHER EVALUATION OF THE NEED AND RECOMMENDATIONS FOR SUBGRADE STABILIZATION CAN BE PROVIDED DURING CONSTRUCTION AS NATIVE SOIL, OR DISTURBED CHEMICALLY TREATED SOIL.
<br /> GEOTECHNICAL ENGINEERING EVALUATION FOR FOUNDATIONS AND FLOOR SLABS. THE GEOTECHNICAL CONDITIONS ARE EXPOSED.
<br /> DEMOLITION FILL MATERIAL TYPES GRADING AND DRAINAGE
<br /> THE PROPOSED CHURCH BUILDING ADDITION WILL BE CONSTRUCTED WITHIN THE FOOTPRINT OF EXISTING SINGLE-STORY STRUCTURES AND FILL REQUIRED TO ACHIEVE DESIGN GRADE SHOULD BE CLASSIFIED AS STRUCTURAL FILL AND GENERAL FILL. STRUCTURAL FILL IS ALL GRADES MUST PROVIDE EFFECTIVE DRAINAGE AWAY FROM THE BUILDINGS DURING AND AFTER CONSTRUCTION AND SHOULD BE
<br /> A STEEL WATER TANK WHICH WILL NEED TO BE DEMOLISHED, ALONG WITH AN EXTERIOR BASKETBALL COURT, PAVEMENTS, AND UTILITIES. MATERIAL USED BELOW, OR WITHIN 5 FEET OF STRUCTURES. GENERAL FILL IS MATERIAL USED TO ACHIEVE GRADE OUTSIDE OF THESE MAINTAINED THROUGHOUT THE LIFE OF THE STRUCTURES. WATER RETAINED NEXT TO THE BUILDINGS CAN RESULT IN SOIL MOVEMENTS
<br /> WE RECOMMEND EXISTING FOUNDATIONS, SLABS, AND UTILITIES BE REMOVED FROM WITHIN THE PROPOSED CHURCH BUILDING ADDITION AREAS. GREATER THAN THOSE DISCUSSED IN THIS REPORT. GREATER MOVEMENTS CAN RESULT IN UNACCEPTABLE DIFFERENTIAL FLOOR
<br /> SLABAND/OR FOUNDATION MOVEMENTS, CRACKED SLABS AND WALLS, AND ROOF LEAKS. THE ROOFS SHOULD HAVE GUTTERS/DRAINS WITH
<br /> FOOTPRINT AND AT LEAST 5 FEET BEYOND THE OUTER EDGE OF FOUNDATIONS. THIS SHOULD INCLUDE REMOVAL OF ANY LOOSE BACKFILL DOWNSPOUTS THAT DISCHARGE ONTO SPLASH BLOCKS A DISTANCE OF AT LEAST 10 FEET FROM THE BUILDINGS, ONTO PAVEMENTS, OR
<br /> FOUND ADJACENT TO EXISTING FOUNDATIONS. IF PIPES ARE ABANDONED IN-PLACE, THEY SHOULD BE FILLED COMPLETELY WITH LEAN REUSE OF ON-SITE SOIL: EXCAVATED ON-SITE CLAYS ARE NOT SUITABLE FOR REUSE AS STRUCTURAL FILL AND SHOULD NOT BE ARE TIED TO TIGHT LINES THAT DISCHARGE INTO A STORM DRAIN SYSTEM.
<br /> CEMENT GROUT, OR OTHER SUITABLE MATERIAL, TO AVOID COLLAPSE IN THE FUTURE. ALL MATERIALS DERIVED FROM THE DEMOLITION OF PLACED BENEATH SETTLEMENT SENSITIVE STRUCTURES AND WITHIN FOUNDATION BEARING ZONES BUT MAY BE SELECTIVELY REUSED AS
<br /> EXISTING STRUCTURES AND PAVEMENTS SHOULD BE REMOVED FROM THE SITE AND NOT BE ALLOWED FOR USE AS ON-SITE FILL, UNLESS FILL BELOW PAVEMENT AND LANDSCAPING AREAS. PORTIONS OF THE ON-SITE SOIL HAVE AN ELEVATED FINES CONTENT AND WILL BE EXPOSED GROUND SHOULD BE SLOPED AND MAINTAINED AT A MINIMUM 5 PERCENT AWAY FROM THE BUILDINGS FOR AT LEAST 10 FEET
<br /> PROCESSED IN ACCORDANCE WITH THE FILL REQUIREMENTS INCLUDED IN THIS REPORT. SENSITIVE TO MOISTURE CONDITIONS (PARTICULARLY DURING SEASONALLY WET PERIODS) AND MAY NOT BE SUITABLE FOR REUSE WHEN BEYOND THE PERIMETERS OF THE BUILDINGS. IF A MINIMUM 5 PERCENT SLOPE CANNOT BE ACHIEVED DUE TO SITE GRADES, A MINIMUM
<br /> ABOVE OPTIMUM MOISTURE CONTENT. 21 ZZ PERCENT SLOPE COULD BE USED PROVIDED PAVEMENT OR HARDSCAPE SURROUNDS AND EXTENDS TO THE BUILDINGS, OR A
<br /> FOR AREAS OUTSIDE THE PROPOSED CHURCH BUILDING ADDITION FOOTPRINT AND FOUNDATION BEARING ZONES, EXISTING FOUNDATIONS, FROM THE BUILDINGS.
<br /> FR WA AROUND THE PERIMETER OF THE FOUNDATIONS THAT CARRIES WATER AWAY FLOOR SLABS, AND UTILITIES SHOULD BE REMOVED WHERE THEY CONFLICT WITH PROPOSED UTILITIES AND PAVEMENTS. IN SUCH CASES, MATERIAL PROPERTY REQUIREMENTS FOR ON-SITE SOIL FOR USE AS GENERAL FILL AND STRUCTURAL FILL ARE NOTED IN THE FOLLOWING LOCALLY, FLATTER GRADES MAY SUBDRAIN COULD BE INSTALLED BE NECESSARY TO TRANSITION ADA ACCESS REQUIREMENTS FOR A A FR AFTER BUILDING
<br /> EXISTING FOUNDATIONS, FLOOR SLABS, AND UTILITIES SHOULD BE REMOVED TO A DEPTH OF AT LEAST 2 FEET BELOW THE AFFECTED TABLE: CONSTRUCTION AND LANDSCAPING HAVE BEEN COMPLETED, FINAL GRADES SHOULD BE VERIFIED TO DOCUMENT EFFECTIVE DRAINAGE HAS
<br /> UTILITY OR DESIGN PAVEMENT SUBGRADE ELEVATION. PROPERTY STRUCTURAL FILL GENERAL FILL BEEN ACHIEVED. GRADES AROUND THE STRUCTURES SHOULD ALSO BE PERIODICALLY INSPECTED AND ADJUSTED, AS NECESSARY, AS
<br /> SITE PREPARATION COMPOSITION FREE OF DELETERIOUS MATERIAL FREE OF DELETERIOUS MATERIAL PART OF THE STRUCTURES' MAINTENANCE PROGRAM. WHERE PAVING OR FLATWORK ABUTS THE STRUCTURES, A MAINTENANCE PROGRAM
<br /> PRIOR TO PLACING FILL, EXISTING DEBRIS, VEGETATION, TOPSOIL, AND ROOT MATS SHOULD BE REMOVED. COMPLETE STRIPPING OF THE SHOULD BE ESTABLISHED TO EFFECTIVELY SEAL AND MAINTAIN JOINTS AND PREVENT SURFACE WATER INFILTRATION.
<br /> TOPSOIL SHOULD BE PERFORMED IN THE PROPOSED BUILDING AREAS. STRIPPING SHOULD EXTEND LATERALLY A MINIMUM OF 5 FEET MAXIMUM PARTICLE SIZE 3 INCHES 6 INCHES (OR OF THE LIFT THICKNESS) ANY PLANTERS AND/OR BIO-SWALES LOCATED WITHIN 10 FEET OF THE BUILDINGS SHOULD BE SELF-CONTAINED OR LINED WITH AN
<br /> BEYOND THE LIMITS OF PROPOSED IMPROVEMENTS. FINES CONTENT LESS THAN 60% PASSING NO.200 SIEVE NOT LIMITED IMPERMEABLE MEMBRANE TO PREVENT WATER FROM ACCESSING SUBGRADE SOILS BELOW THE BUILDINGS. SPRINKLER MAINS AND SPRAY
<br /> MATURE TREES ARE LOCATED WITHIN OR NEAR THE FOOTPRINT OF THE PROPOSED BUILDINGS, WHICH WILL REQUIRE REMOVAL AT THE MAXIMUM LIQUID LIMIT OF 30 MAXIMUM HEADS SHOULD BE LOCATED A MINIMUM OF 5 FEET AWAY FROM THE FOUNDATION LINES.
<br /> ONSET OF CONSTRUCTION. TREE ROOT SYSTEMS CAN REMOVE SUBSTANTIAL MOISTURE FROM SURROUNDING SOILS. WHERE TREES ARE PLASTICITY PLASTICITY INDEX OF 10 EXPANSION NOT LIMITED NO VEGETATION OVER 6 FEET IN HEIGHT SHALL BE PLANTED WITHIN 20 FEET OF THE BUILDING PERIMETERS UNLESS A ROOT BARRIER IS
<br /> REMOVED, THE FULL ROOT BALL AND ALL ASSOCIATED DRY AND DESICCATED SOILS SHOULD BE REMOVED. THE SOIL WHICH CONTAIN INDEX LESS THAN 20 PROVIDED BETWEEN THE STRUCTURES AND TREE TO LIMIT ROOTS WITHIN 10 FEET OF THE BUILDINGS. ROOTS CAN DRAW ADDITIONAL
<br /> LESS THAN 3 PERCENT ORGANICS CAN BE REUSED AS ENGINEERED FILL PROVIDED THE MATERIAL IS MOISTURE CONDITIONED AND GEOMODEL LAYER EXPECTED TO BE SUITABLE 3 1,2,4 MOISTURE FROM THE SOILS AND CAUSE EXCESSIVE VOLUME CHANGES IN THE SOIL RESULTING IN BUILDING MOVEMENT.
<br /> PROPERLY COMPACTED.
<br /> 1. BASED ON SUBSURFACE EXPLORATION. ACTUAL MATERIAL SUITABILITY SHOULD BE DETERMINED IN THE FIELD AT TIME OF CONSTRUCTION. IMPLEMENTATION OF ADEQUATE DRAINAGE FOR THIS PROJECT CAN AFFECT THE SURROUNDING DEVELOPMENTS. CONSEQUENTLY, IN
<br /> EVIDENCE OF UNDERGROUND FACILITIES WAS OBSERVED DURING THE EXPLORATION AND SITE RECONNAISSANCE DUE TO THE EXISTING STRUCTURES. IF UNEXPECTED FILLS OR UNDERGROUND FACILITIES ARE ENCOUNTERED, SUCH FEATURES SHOULD BE REMOVED, AND THE IMPORTED FILL MATERIALS: IMPORTED FILL MATERIALS SHOULD MEET THE FOLLOWING MATERIAL PROPERTY REQUIREMENTS. REGARDLESS OF ITS ADDITION TO DESIGNING AND CONSTRUCTING DRAINAGE FOR THIS PROJECT, THE EFFECTS OF SITE DRAINAGE SHOULD BE TAKEN INTO
<br /> CONSIDERATION FOR THE PLANNED STRUCTURES ON THIS PROPERTY, THE UNDEVELOPED PORTIONS OF THIS PROPERTY, AND
<br /> EXCAVATION THOROUGHLY CLEANED PRIOR TO BACKFILL PLACEMENT AND/OR CONSTRUCTION. SOURCE, COMPACTED FILL SHOULD CONSIST OF APPROVED MATERIALS THAT ARE FREE OF ORGANIC MATTER AND DEBRIS. FOR ALL IMPORT MATERIAL, SURROUNDING REPORT. EXTRA CARE SHOULD BE TAKEN TO ENSURE IRRIGATION AND DRAINAGE FROM ADJACENT AREAS DO NOT DRAIN
<br /> THE CONTRACTOR SHALL SUBMIT CURRENT VERIFIED REPORTS FROM A RECOGNIZED ANALYTICAL LABORATORY INDICATING THAT THE IMPORT HAS A
<br /> SUBGRADE PREPARATION "NOT APPLICABLE" (CLASS SO) POTENTIAL FOR SULFATE ATTACK BASED UPON CURRENT ACI CRITERIA AND IS "MILDLY CORROSIVE" TO FERROUS ONTO THE PROJECT SITE OR SATURATE THE CONSTRUCTION AREA.
<br /> METAL AND COPPER. THE REPORTS SHALL BE ACCOMPANIED BY A WRITTEN STATEMENT FROM THE CONTRACTOR THAT THE LABORATORY TEST
<br /> AFTER CLEARING, ANY REQUIRED CUTS AND OVEREXCAVATION SHOULD BE MADE. SUBGRADE SOILS BENEATH PROPOSED FLOOR SLABS RESULTS ARE REPRESENTATIVE OF ALL IMPORT MATERIAL THAT WILL BE BROUGHT TO THE PROJECT. EARTHWORK CONSTRUCTION CONSIDERATIONS
<br /> AND EXTERIOR HARDSCAPE SHOULD BE REMOVED TO A DEPTH OF 18 INCHES BENEATH THE PROPOSED SLABS/HARDSCAPE OR BE SHALLOW EXCAVATIONS FOR THE PROPOSED STRUCTURES ARE ANTICIPATED TO BE ACCOMPLISHED WITH CONVENTIONAL CONSTRUCTION
<br /> CHEMICALLY TREATED TO HELP REDUCE THE HEAVE POTENTIAL OF EXPANSIVE SOILS. EXCAVATED MATERIAL MAY BE STOCKPILED FOR USE SOIL TYPE USES CLASSIFICATION ACCEPTABLE PARAMETERS (FOR STRUCTURAL FILL) EQUIPMENT. UPON COMPLETION OF FILLING AND GRADING, CARE SHOULD BE TAKEN TO MAINTAIN THE SUBGRADE WATER CONTENT PRIOR
<br /> AS FILL PROVIDED IT IS CLEANED OF ORGANIC MATERIAL, DEBRIS, AND ANY OTHER DELETERIOUS MATERIAL AND MEETS THE CRITERIA FOR LIQUID LIMIT LESS THAN 30 TO CONSTRUCTION OF GRADE-SUPPORTED IMPROVEMENTS SUCH AS FLOOR SLABS AND EXTERIOR HARDSCAPE. CONSTRUCTION TRAFFIC
<br /> GENERAL OR STRUCTURAL FILL SPECIFIED IN THE FILL MATERIAL TYPES SECTION OF THIS REPORT. PLASTICITY INDEX LESS THAN 10 OVER THE COMPLETED SUBGRADES SHOULD BE AVOIDED TO THE EXTENT PRACTICAL. THE SITE SHOULD ALSO BE GRADED TO PREVENT
<br /> LOW PLASTICITY CL, SC EXPANSION INDEX PONDING OF SURFACE WATER ON THE PREPARED SUBGRADES OR IN EXCAVATIONS. WATER COLLECTING OVER OR ADJACENT TO
<br /> ONCE CUTS AND OVEREXCAVATION OPERATIONS ARE COMPLETE, THE RESULTING SUBGRADE SHOULD BE PROOFROLLED WITH AN LESS THAN 20 LESS THAN 60% PASSING N0.200 SIEVE CONSTRUCTION AREAS SHOULD BE REMOVED. IF THE SUBGRADE SHOULD BECOME DESICCATED, SATURATED, OR IS DISTURBED, THE
<br /> ADEQUATELY LOADED VEHICLE SUCH AS A FULLY-LOADED TANDEM-AXLE DUMP TRUCK. THE PROOFROLLING SHOULD BE PERFORMED AFFECTED MATERIAL SHOULD BE REMOVED, OR THE MATERIALS SHOULD BE SCARIFIED, MOISTURE CONDITIONED, AND RECOMPACTED PRIOR
<br /> UNDER THE OBSERVATION OF THE GEOTECHNICAL ENGINEER OR THEIR REPRESENTATIVE. AREAS EXCESSIVELY DEFLECTING UNDER THE GRANDULAR GW, GM, SW, SM LESS THAN 40% PASSING N0.200 SIEVE TO CONSTRUCTION.
<br /> PROOFROLL SHOULD 1. STRUCTURAL AND GENERAL FILL SHOULD CONSIST OF APPROVED MATERIALS FREE OF ORGANIC MATTER AND DEBRIS AND SHOULD CONTAIN NO
<br /> BE DELINEATED AND SUBSEQUENTLY ADDRESSED BY THE GEOTECHNICAL ENGINEER. SUCH AREAS SHOULD EITHER BE REMOVED OR MATERIAL LARGER THAN 3 INCHES AND 6 INCHES IN GREATEST DIMENSION, RESPECTIVELY. A SAMPLE OF EACH MATERIAL TYPE SHOULD BE WE RECOMMEND THAT THE EARTHWORK PORTION OF THIS PROJECT BE COMPLETED DURING EXTENDED PERIODS OF DRY WEATHER IF
<br /> MODIFIED BY STABILIZING AS NOTED IN THE SOIL STABILIZATION SECTION OF THIS REPORT. EXCESSIVELY WET OR DRY MATERIAL SHOULD SUBMITTED TO THE GEOTECHNICAL ENGINEER FOR EVALUATION AT LEAST TWO WEEKS PRIOR TO USE ON THIS SITE. ADDITIONAL GEOTECHNICAL POSSIBLE. IF EARTHWORK IS COMPLETED DURING THE WET SEASON (TYPICALLY NOVEMBER THROUGH APRIL) IT MAY BE NECESSARY TO
<br /> EITHER BE REMOVED, OR MOISTURE CONDITIONED AND RECOMPACTED. CONSULTATION SHOULD BE PROVIDED PRIOR TO USE OF UNIFORMLY GRADED GRAVEL ON THE SITE. TAKE EXTRA PRECAUTIONARY MEASURES TO PROTECT SUBGRADE SOILS. WET SEASON EARTHWORK OPERATIONS MAY REQUIRE ADDITIONAL
<br /> MITIGATION MEASURES BEYOND THAT WHICH WOULD BE EXPECTED DURING THE DRIER SUMMER AND FALL MONTHS. THIS COULD INCLUDE GROUND
<br /> ONCE PROOF ROLLING HAS BEEN PERFORMED, ALL EXPOSED AREAS, ONCE PROPERLY CLEARED, SHOULD BE SCARIFIED, MOISTURE 2. CALTRANS CLASS II AGGREGATE BASE MAY BE USED FOR THIS MATERIAL. RECYCLED AGGREGATE BASE SHOULD NOT BE USED WITHOUT PRIOR STABILIZATION UTILIZING CHEMICAL TREATMENT OF THE SUBGRADE, DIVERSION OF SURFACE RUNOFF AROUND EXPOSED SOILS, AND DRAINING OF
<br /> CONDITIONED AS NECESSARY, AND COMPACTED PER THE COMPACTION REQUIREMENTS IN THIS REPORT. THE DEPTH OF SCARIFICATION OF APPROVAL BY THE GEOTECHNICAL ENGINEER. PONDED WATER ON THE SITE. ONCE SUBGRADES ARE ESTABLISHED, IT MAY BE NECESSARY TO PROTECT THE EXPOSED SUBGRADE SOILS FROM
<br /> SUBGRADE SOILS AND MOISTURE CONDITIONING OF THE SUBGRADE IS HIGHLY DEPENDENT UPON THE TIME OF YEAR OF CONSTRUCTION CONSTRUCTION TRAFFIC.
<br /> AND THE SITE CONDITIONS THAT EXIST IMMEDIATELY PRIOR TO CONSTRUCTION. IF CONSTRUCTION OCCURS DURING THE WINTER OR SPRING, FIIL PLACEMENT AND COMPACTION REQUIREMENTS
<br /> WHEN THE SUBGRADE SOILS ARE TYPICALLY ALREADY IN A MOIST CONDITION, SCARIFICATION AND COMPACTION MAY ONLY BE 8 INCHES. COMPACTED NATIVE SOIL AND STRUCTURAL AND GENERAL FILL SHOULD MEET THE FOLLOWING COMPACTION REQUIREMENTS. AS A MINIMUM, EXCAVATIONS SHOULD BE PERFORMED IN ACCORDANCE WITH OSHA 29 CFR, PART 1926, SUBPART P, "EXCAVATIONS" AND ITS
<br /> IF CONSTRUCTION OCCURS DURING THE SUMMER OR FALL WHEN THE SUBGRADE SOILS HAVE BEEN ALLOWED TO DRY OUT DEEPER, THE APPENDICES, AND IN ACCORDANCE WITH ANY APPLICABLE LOCAL AND/OR STATE REGULATIONS. STOCKPILES OF SOIL, CONSTRUCTION MATERIALS, AND
<br /> DEPTH OF SCARIFICATION AND MOISTURE CONDITIONING MAY BE AS MUCH AS 18 INCHES OR MORE. A REPRESENTATIVE FROM TERRACON CONSTRUCTION EQUIPMENT SHOULD NOT BE PLACED NEAR TRENCHES OR EXCAVATIONS. THE CONTRACTOR IS RESPONSIBLE FOR MAINTAINING THE
<br /> SHOULD BE PRESENT DURING EARTHWORK TO OBSERVE THE EXPOSED SUBGRADE AND CONFIRM THE DEPTH OF SCARIFICATION AND ITEM STRUCTURAL FILL GENERAL FILL STABILITY OF ADJACENT STRUCTURES DURING CONSTRUCTION.
<br /> MOISTURE CONDITIONING REQUIRED. THE EXPOSED SUBGRADE WILL LIKELY BE AT AN ELEVATED MOISTURE CONTENT BECAUSE IT HAS BEEN
<br /> COVERED BY PAVEMENT AND MAY REQUIRE SOME DRYING TO ACHIEVE THE REQUIRED COMPACTION. CONSTRUCTION SITE SAFETY IS THE SOLE RESPONSIBILITY OF THE CONTRACTOR WHO CONTROLS THE MEANS, METHODS, AND SEQUENCING OF
<br /> 8 INCHES OR LESS IN LOOSE THICKNESS WHEN HEAVY, CONSTRUCTION OPERATIONS. UNDER NO CIRCUMSTANCES SHALL THE INFORMATION PROVIDED HEREIN BE INTERPRETED TO MEAN TERRACON IS
<br /> FOLLOWING SCARIFICATION, MOISTURE CONDITIONING, AND COMPACTION OF THE SUBGRADE SOILS, COMPACTED STRUCTURAL FILL SOILS MAXIMUM LIFT THICKNESS SELF-PROPELLED COMPACTION EQUIPMENT IS USED. 4 TO 6 SAME AS STRUCTURAL FILL ASSUMING RESPONSIBILITY FOR CONSTRUCTION SITE SAFETY OR THE CONTRACTOR'S ACTIVITIES; SUCH RESPONSIBILITY SHALL NEITHER BE IMPLIED NOR
<br /> SHOULD THEN BE PLACED TO THE PROPOSED DESIGN GRADE AND THE MOISTURE CONTENT AND COMPACTION OF SUBGRADE SOILS INCHES IN LOOSE THICKNESS WHEN HAND-GUIDED EQUIPMENT (IE. INFERRED.
<br /> SHOULD BE MAINTAINED UNTIL FOUNDATION OR FLOOR SLAB CONSTRUCTION. JUMPING JACK OR PLATE COMPACTOR) IS USED
<br /> EXCAVATIONS OR OTHER ACTIVITIES RESULTING IN GROUND DISTURBANCE HAVE THE POTENTIAL TO AFFECT ADJOINING PROPERTIES AND STRUCTURES.
<br /> BASED UPON THE SUBSURFACE CONDITIONS DETERMINED FROM THE GEOTECHNICAL EXPLORATION, SUBGRADE SOILS EXPOSED DURING OUR SCOPE OF SERVICES DOES NOT INCLUDE REVIEW OF AVAILABLE FINAL GRADING INFORMATION OR CONSIDER POTENTIAL TEMPORARY GRADING
<br /> CONSTRUCTION ARE ANTICIPATED TO BE RELATIVELY WORKABLE; HOWEVER, THE WORKABILITY OF THE SUBGRADE MAY BE AFFECTED BY PERFORMED BY THE CONTRACTOR FOR POTENTIAL EFFECTS SUCH AS GROUND MOVEMENT BEYOND THE PROJECT REPORT. A
<br /> PRECIPITATION, REPETITIVE CONSTRUCTION TRAFFIC OR OTHER FACTORS. IF UNWORKABLE CONDITIONS DEVELOP, WORKABILITY MAYBE MINIMUM COMPACTION 95% OF MAX. FOR AGGREGATE BASE AND CHEMICALLY TREATED PRECONSTRUCTION/PRECONDITION SURVEY SHOULD BE CONDUCTED TO DOCUMENT NEARBY PROPERTY/INFRASTRUCTURE PRIOR TO ANY SITE
<br /> IMPROVED BY SCARIFYING AND DRYING. REQUIREMENTS SOIL, AND FOR FILL DEEPER THAN 5 FEET. 90% OF MAX. FOR 90% OF MAX. DEVELOPMENT ACTIVITY. EXCAVATION OR GROUND DISTURBANCE ACTIVITIES ADJACENT OR NEAR PROPERTY LINES SHOULD BE MONITORED OR
<br /> ALL OTHER LOCATIONS. INSTRUMENTED FOR POTENTIAL GROUND MOVEMENTS THAT COULD NEGATIVELY AFFECT ADJOINING PROPERTY AND/OR STRUCTURES.
<br /> EXCAVATION CONSTRUCTION OBSERVATION AND TESTING
<br /> WE ANTICIPATE THAT EXCAVATIONS FOR THE PROPOSED CONSTRUCTION CAN BE ACCOMPLISHED WITH CONVENTIONAL EARTHMOVING LOW PLASTICITY COHESIVE: +1% TO +3% ABOVE OPTIMUM THE EARTHWORK EFFORTS SHOULD BE OBSERVED BY THE GEOTECHNICAL ENGINEER OR OTHERS UNDER THEIR DIRECTION OBSERVATION
<br /> EQUIPMENT. THE BOTTOM OF EXCAVATIONS SHOULD BE THOROUGHLY CLEANED OF LOOSE OR SOFT SOILS AND DISTURBED MATERIALS ( )
<br /> PRIOR TO BACKFILL PLACEMENT AND/OR CONSTRUCTION. WATER CONTENT RANGE MEDIUM PLASTICITY COHESIVE: +2% TO +4% ABOVE OPTIMUM AS REQUIRED TO ACHIEVE MIN. SHOULD INCLUDE DOCUMENTATION OF ADEQUATE REMOVAL OF SURFICIAL MATERIALS (VEGETATION, TOPSOIL, DEBRIS, AND PAVEMENTS),
<br /> HIGH PLASTICITY COHESIVE: +3% TO +5% ABOVE OPTIMUM COMPACTION REQUIREMENTS EVALUATION AND REMEDIATION OF EXISTING FILL MATERIALS IF ENCOUNTERED, AS WELL AS PROOFROLLING AND MITIGATION OF
<br /> AS NEW FOUNDATIONS WILL BE CONSTRUCTED ADJACENT TO EXISTING FOUNDATIONS, THERE IS A RISK THAT THE BEARING MATERIAL COULD BECOME GRANULAR: -2% TO +2% OF OPTIMUM UNSUITABLE AREAS DELINEATED BY THE PROOFROLL.
<br /> UNDERMINED AND/OR OVERSTRESSED DUE TO OVERLAPPING STRESSES. PROVISIONS SHOULD BE MADE DURING CONSTRUCTION TO PREVENT
<br /> UNDERMINING OR DISTURBING THE SOILS SUPPORTING THE EXISTING FOUNDATIONS. EXCAVATIONS SHOULD NOT EXTEND BELOW AN IMAGINARY 1H:1V 1. MAXIMUM DENSITY AND OPTIMUM WATER CONTENT AS DETERMINED BY THE MODIFIED PROCTOR TEST (ASTM D 1557). EACH LIFT OF COMPACTED FILL SHOULD BE TESTED, EVALUATED, AND REWORKED, AS NECESSARY, AS RECOMMENDED BY THE
<br /> INCLINED PLANE PROJECTING BELOW THE BOTTOM EDGE OF ANY ADJACENT EXISTING FOUNDATIONS AS SHOWN IN THE FIGURE TO THE RIGHT, UNLESS 2. IF THE GRANULAR MATERIAL IS A COARSE SAND OR GRAVEL, OR OF A UNIFORM SIZE, OR HAS ALOW FINES CONTENT, COMPACTION GEOTECHNICAL ENGINEER PRIOR TO PLACEMENT OF ADDITIONAL LIFTS. EACH LIFT OF FILL SHOULD BE TESTED FOR DENSITY AND WATER
<br /> SHORING IS INSTALLED. COMPARISON TO RELATIVE DENSITY MAY BE MORE APPROPRIATE. IN THIS CASE, GRANULAR MATERIALS SHOULD BE COMPACTED TO CONTENT AT A FREQUENCY OF AT LEAST ONE TEST FOR EVERY 1,500 SQUARE FEET OF COMPACTED FILL IN THE BUILDING AREAS.
<br /> AT LEAST 70% RELATIVE DENSITY (ASTM D 4253 AND D 4254). MATERIALS NOT AMENABLE TO DENSITY TESTING SHOULD BE PLACED WHERE NOT SPECIFIED BY LOCAL ORDINANCE, ONE DENSITY AND WATER CONTENT TEST SHOULD BE PERFORMED FOR EVERY 50 LINEAR
<br /> MAINTAINING A SUFFICIENT CLEAR DISTANCE BETWEEN NEW AND EXISTING FOUNDATIONS WILL REDUCE THE POTENTIAL FOR INCREASED BEARING AND COMPACTED TO A STABLE CONDITION OBSERVED FULL TIME BY THE GEOTECHNICAL ENGINEER OR REPRESENTATIVE. FEET OF COMPACTED UTILITY TRENCH BACKFILL AND A MINIMUM OF ONE TEST PERFORMED FOR EVERY 12 VERTICAL INCHES OF
<br /> STRESSES AND ADDITIONAL FOUNDATION SETTLEMENT. CONNECTIONS BETWEEN THE EXISTING CHURCH BUILDING AND THE PROPOSED ADDITION SHOULD COMPACTED BACKFILL.
<br /> ALLOW FOR SOME DIFFERENTIAL MOVEMENT. UTILITY TRENCH BACKFILL
<br /> IN AREAS OF FOUNDATION EXCAVATIONS, THE BEARING SUBGRADE SHOULD BE EVALUATED BY THE GEOTECHNICAL ENGINEER. IF
<br /> INDIVIDUAL CONTRACTORS ARE RESPONSIBLE FOR DESIGNING AND CONSTRUCTING STABLE, TEMPORARY EXCAVATIONS. EXCAVATIONS SHOULD BE ANY SOFT OR UNSUITABLE MATERIALS ENCOUNTERED AT THE BOTTOM OF UTILITY TRENCH EXCAVATIONS SHOULD BE REMOVED AND UNANTICIPATED CONDITIONS ARE OBSERVED, THE GEOTECHNICAL ENGINEER SHOULD PRESCRIBE MITIGATION OPTIONS.
<br /> SLOPED OR SHORED IN THE INTEREST OF SAFETY FOLLOWING LOCAL, AND FEDERAL REGULATIONS, INCLUDING CURRENT OSHA EXCAVATION AND REPLACED WITH STRUCTURAL FILL OR BEDDING MATERIAL IN ACCORDANCE WITH PUBLIC WORKS SPECIFICATIONS FOR THE UTILITY BE
<br /> TRENCH SAFETY STANDARDS. SUPPORTED. THIS RECOMMENDATION IS PARTICULARLY APPLICABLE TO UTILITY WORK REQUIRING GRADE CONTROL AND/OR IN AREAS IN ADDITION TO THE DOCUMENTATION OF THE ESSENTIAL PARAMETERS NECESSARY FOR CONSTRUCTION, THE CONTINUATION OF THE
<br /> WHERE SUBSEQUENT GRADE RAISING COULD CAUSE SETTLEMENT IN THE SUBGRADE SUPPORTING THE UTILITY. GEOTECHNICAL ENGINEER INTO THE CONSTRUCTION PHASE OF THE PROJECT PROVIDES THE CONTINUITY TO MAINTAIN THE GEOTECHNICAL
<br /> SOIL STABILIZATION TRENCH EXCAVATION SHOULD NOT BE CONDUCTED BELOW A DOWNWARD 1: 1 PROJECTION FROM EXISTING FOUNDATIONS WITHOUT ENGINEER'S EVALUATION OF SUBSURFACE CONDITIONS, INCLUDING ASSESSING VARIATIONS AND ASSOCIATED DESIGN CHANGES.
<br /> METHODS OF SUBGRADE STABILIZATION, AS DESCRIBED IN THIS SECTION, COULD INCLUDE SCARIFICATION, MOISTURE CONDITIONING AND ENGINEERING REVIEW OF SHORING REQUIREMENTS AND GEOTECHNICAL OBSERVATION DURING CONSTRUCTION.
<br /> RECOMPACTION, REMOVAL OF UNSTABLE MATERIALS AND REPLACEMENT WITH GRANULAR FILL (WITH OR WITHOUT GEOSYNTHETICS), AND
<br /> CHEMICAL STABILIZATION. THE APPROPRIATE METHOD OF IMPROVEMENT, IF REQUIRED, WOULD BE DEPENDENT ON FACTORSSUCH AS ON-SITE MATERIALS ARE CONSIDERED SUITABLE FOR BACKFILL OF UTILITY AND PIPE TRENCHES FROM 1 FOOT ABOVE THE TOP OF THE
<br /> SCHEDULE, WEATHER, THE SIZE OF AREA TO BE STABILIZED, AND THE NATURE OF THE INSTABILITY. MORE DETAILED RECOMMENDATIONS PIPE TO THE FINAL GROUND SURFACE, PROVIDED THE MATERIAL IS FREEOF ORGANIC MATTER AND DELETERIOUS SUBSTANCES. WHERE
<br /> CAN BE PROVIDED DURING CONSTRUCTION AS THE NEED FOR SUBGRADE STABILIZATION OCCURS. PERFORMING SITE GRADING OPERATIONS TRENCHES ARE PLACED BENEATH SLABS OR FOOTINGS, THE BACKFILL SHOULD SATISFY THE GRADATION AND ATTERBERG LIMIT
<br /> DURING WARM SEASONS AND DRY PERIODS WOULD HELP REDUCE THE AMOUNT OF SUBGRADE STABILIZATION REQUIRED. REQUIREMENTS FOR STRUCTURAL FILL DISCUSSED IN THIS REPORT.
<br /> IF THE EXPOSED SUBGRADE IS UNSTABLE DURING PROOFROLLING OPERATIONS, IT COULD BE STABILIZED USING ONE OF THE FOLLOWING TRENCH BACKFILL SHOULD BE MECHANICALLY PLACED AND COMPACTED AS DISCUSSED EARLIER IN THIS REPORT. COMPACTION OF INITIAL
<br /> METHODS: LIFTS SHOULD BE ACCOMPLISHED WITH HAND-OPERATED TAMPERS OR OTHER LIGHTWEIGHT COMPACTORS. FLOODING OR JETTING FOR
<br /> ■ SCARIFICATION AND RECOMPACTION - IT MAY BE FEASIBLE TO SCARIFY, DRY, AND RECOMPACT THE EXPOSED SOILS. THE SUCCESS PLACEMENT AND COMPACTION OF BACKFILL IS NOT RECOMMENDED.
<br /> OF THIS PROCEDURE WOULD DEPEND PRIMARILY UPON FAVORABLE WEATHER AND SUFFICIENT TIME TO DRY THE SOILS. STABLE
<br /> SUBGRADES LIKELY WOULD NOT BE ACHIEVABLE IF THE THICKNESS OF THE UNSTABLE SOIL IS GREATER THAN ABOUT 1 FOOT, IF THE ALL TRENCH EXCAVATIONS SHOULD BE MADE WITH SUFFICIENT WORKING SPACE TO PERMIT CONSTRUCTION INCLUDING BACKFILL
<br /> UNSTABLE SOIL IS AT OR NEAR GROUNDWATER LEVELS, OR IF CONSTRUCTION IS PERFORMED DURING A PERIOD OF WET OR COOL PLACEMENT AND COMPACTION. IF UTILITY TRENCHES ARE BACKFILLED WITH RELATIVELY CLEAN GRANULAR MATERIAL, THEY SHOULD BE
<br /> WEATHER WHEN DRYING IS DIFFICULT. CAPPED WITH AT LEAST 18 INCHES OF CEMENTITIOUS FLOWABLE FILL OR COHESIVE FILL IN NON-PAVEMENT AREAS TO REDUCE THE
<br /> ■ AGGREGATE BASE - THE USE OF CALTRANS CLASS II AGGREGATE BASE IS A COMMON PROCEDURE TO IMPROVE SUBGRADE INFILTRATION AND CONVEYANCE OF SURFACE WATER THROUGH THE TRENCH BACKFILL. ATTEMPTS SHOULD ALSO BE MADE TO LIMIT THE
<br /> STABILITY. TYPICAL UNDERCUT DEPTHS WOULD BE EXPECTED TO RANGE FROM ABOUT 6 INCHES TO 18 INCHES BELOW FINISHED AMOUNT OF FINES MIGRATION INTO THE CLEAN GRANULAR MATERIAL. FINES MIGRATION INTO CLEAN GRANULAR FILL MAY RESULT IN
<br /> SUBGRADE ELEVATION. THE USE OF HIGH MODULUS GEOSYNTHETICS (I.E., ENGINEERING FABRIC OR GEOGRID) COULD ALSO BE CONSIDERED UNANTICIPATED LOCALIZED SETTLEMENTS OVER A PERIOD OF TIME. TO HELP LIMIT THE AMOUNT OF FINES MIGRATION, TERRACON
<br /> AFTER UNDERGROUND WORK SUCH AS UTILITY CONSTRUCTION IS COMPLETED. PRIOR TO PLACING THE FABRIC OR GEOGRID, WE RECOMMENDS THE USE OF A GEOTEXTILE FABRIC THAT IS DESIGNED TO PREVENT FINES MIGRATION IN AREAS OF CONTACT BETWEEN
<br /> RECOMMEND THAT ALL BELOW GRADE CONSTRUCTION, SUCH AS UTILITY LINE INSTALLATION, BE COMPLETED TO AVOID DAMAGING THE CLEAN GRANULAR MATERIAL AND FINE-GRAINED SOILS. TERRACON ALSO RECOMMENDS THAT CLEAN GRANULAR FILL BE TRACKED OR
<br /> FABRIC OR GEOGRID. EQUIPMENT SHOULD NOT BE OPERATED ABOVE THE FABRIC OR GEOGRID UNTIL ONE FULL LIFT OF AGGREGATE BASE TAMPED IN PLACE WHERE POSSIBLE TOLIMIT THE AMOUNT OF FUTURE DENSIFICATION WHICH MAY CAUSE LOCALIZED SETTLEMENTS OVER
<br /> IS PLACED ABOVE IT. THE MAXIMUM PARTICLE SIZE OF GRANULAR MATERIAL PLACED OVER GEOTEXTILE FABRIC OR GEOGRID SHOULD TIME.
<br /> MEET THE MANUFACTURER'S SPECIFICATIONS.
<br /> FOR LOW PERMEABILITY SUBGRADES, UTILITY TRENCHES ARE A COMMON SOURCE OF WATERINFILTRATION AND MIGRATION. UTILITY
<br /> TRENCHES PENETRATING BENEATH THE BUILDINGS SHOULD BE EFFECTIVELY SEALED TO RESTRICT WATER INTRUSION AND FLOW THROUGH
<br /> -- THE TRENCHES, WHICH COULD MIGRATE BELOW THE BUILDINGS. THE TRENCH SHOULD PROVIDE AN EFFECTIVE TRENCH PLUG THAT
<br /> C.
<br /> ��� , 0 UNAUTHORIZED CHANGES AND USES: REVISIONS JOB NO.: 4212 10088 N. STATE ROUTE 99 E. FRONTAGE ROAD
<br /> V; - NO. DESCRIPTION DATE BY WON G ENGINEERS INC. STOFORNI SHEET
<br /> THE ENGINEER PREPARING THESE PLANS WILL NOT BE DATE: AUG 2025 CALIFORNIA C 2
<br /> 3 17 rn PLANNING ENGINEERING SURVEYING
<br /> RESPONSIBLE FOR, OR LIABLE FOR, UNAUTHORIZED CHANGES 4578 FEATHER RIVER DRIVE, SUITE A SCALE: AS SHOWN
<br /> q-Jo-24o � * � 12-3�-2b ,�
<br /> s� cmV ���' \r TO OR USES OF THESE PLANS. ALL CHANGES TO THE PLAN I STOCKTON, CALIFORNIA (209) 476-0011 DRAWN: NS/GC
<br /> yTF of c���Foa � o�c„ti � MUSTPREP BE
<br /> OF THESE AND
<br /> MUST BE APPROVED BY THE S. 0 / R.C.E. 48717 DESIGN: WEI GEOTECHNICAL NOTES OF ONE
<br /> l�✓ DATE $ 29 2025 L.S. 7600 FILE 4212
<br /> CHECKED: ZCW
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