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OGI_SOQv2.1

This document provides information about Oakridge Geoscience, Inc. (OGI), a woman-owned geoscience consulting firm based in Camarillo, California. It describes OGI's experience providing geologic and geotechnical engineering services for infrastructure projects including pipelines, transportation and buildings. Key staff members are introduced, with over 30 years of experience each. Project examples are listed covering areas like water/wastewater facilities, transportation, and site evaluations. Services offered include engineering geology, geotechnical engineering, and construction materials testing.

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! ! ! Oakridge)Geoscience,)Inc.)2)Statement)of)Qualifications) ) Oakridge)Geoscience,)Inc.) 1098%Deseo%Avenue% Camarillo,%California%93010% www.Oakridgegeo.com% Lori)Prentice,)CEG% President% 805A368A7765% Lori@Oakridgegeo.com%% Craig)Prentice,)CEG% Principal% 805A400A0867% Craig@Oakridgegeo.com%% Who)We)Are:! Oakridge!Geosciences,!Inc.!(OGI)!is!a!small,!State!of!California!and! Federal! certified! woman<owned! business! based! in! Camarillo,! California.!! We!were!incorporated!in!Fall!of!2014!and!provide!high!quality!geologic!and! geotechnical! engineering! services! to! public! agencies,! architecture! and! engineering!(A/E)!design!firms,!and!the!energy/oil!and!gas!markets.!!OGI!is! managed!by!two!principal!engineering!geologists,!both!with!over!30!years! of! geologic! and! geotechnical! engineering! experience,! primarily! in! the! central! coastal! areas! of! California.! ! Our! goals! are! to! provide! superior! geoscience!services!to!our!clients,!to!be!our!client’s!geoscience!provider!of! choice,!and!to!conduct!our!business!in!a!respectful!manner!and!in!such!a! way!that!we!can!be!proud!of!each!of!our!accomplishments,!large!or!small.!! Key!factors!in!our!quest!is!to!embrace!quality!assurance!and!quality!control! in!every!step!of!our!work!process,!from!initial!client!interaction!and!meeting,! through! proposal! stages,! contracting,! project! work,! reporting,! and! project! wrap<up.!!Our!staff!is!focused,!attentive!to!client!needs,!and!always!ready! to!meet!your!project!objectives.! Project)Experience:) Our!project!experience!focuses!on!Public!Works!infrastructure!including:! • Desktop!geologic/geotechnical!siting!studies!for!preliminary! planning!of!infrastructure!projects,!and!! • Design<level!geotechnical!studies!for:! ! Water/wastewater!facilities,!! ! Small<!to!large<diameter!pipelines!using!conventional!cut<and< cover!construction!as!well!as!trenchless!technologies,!! ! Transportation,!roadways,!bridges,!soundwalls,!and!bike!paths,! ! Hospitals,!schools,!jail/prison!facilities,! ! Flood!control/levees,! ! Stormwater!BMPs/infiltration!evaluation,! ! Above<!and!below<ground!reservoirs,! ! Above<!and!below<grade!foundations!for!buildings,!plant!facilities,! vaults,!etc.,!and! ! Water!resources.! Services:) Our!services!include:! • Engineering!Geology!–!seismic! hazard!assessments,!fault! evaluations,!landslide! evaluations! • Geotechnical!Engineering! • Project/Site!Management! • Construction!Materials! Engineering!and!Testing! • Geotechnical!Laboratory! Testing! • Geotechnical!and!Geologic! Reviews! Staff)Highlights:) Lori) Prentice,) PG,) CEG,% President.! ! Lori! is! responsible! for! overall! company! operations,! planning,! and! financial! direction.! ! Lori! has! over! 30! years! of! local! and! international! experience! managing! and! directing! geologic! and! geotechnical! infrastructure! projects.! ! Her! experience! provides! unique! insight! into! successful! engineering!geology!and!geotechnical!aspects!of!a!wide!variety!of!projects.! Craig) Prentice,) PG,) CEG,) Principal.! !Craig! brings! over!30!years!of! experience!performing!and! managing! geotechnical!projects!throughout!California!with!a!focus!on!the!central!coast.!!Project!sizes!range!from!$5,000! reconnaissance! studies! to! multiple! million! dollar! infrastructure! design/construction.! ! He! has! managed! geotechnical! groups! of! 30+! professionals! but! maintains! and! active! involvement! in! design! and! construction! projects.!!In!addition!to!his!engineering!geology!role,!Craig!is!our!risk!manager!and!contract!administrator.!! Tony)Robinson,)PhD,)CEG,)GE.!!Tony!brings!over!35!years!of!geotechnical!experience!on!the!central!coast! covering!a!wide!variety!of!projects.!!His!extensive!experience!includes!both!geologic!and!geotechnical!projects! from!design!through!construction.! Certifications:) We!proudly!hold!the!following:! DBE!Firm!No.!42650!(Federal)! SWBE!Firm!No.!42650!(State)! SBE!Firm!No.!1795788!(State)!
! Oakridge)Geoscience,)Inc.)–)Project)Descriptions)) 1" Brine) Disposal) Pipeline,) Water) Replenishment) District) of) Southern) California,) GHD/KEH) Associates.) ) Geotechnical" study" for" an" 1,8006foot" long," 126inch" diameter" high" density" polyethylene" (HDPE)" pipeline" beneath" San" Gabriel" River" Parkway" near" the" San" Gabriel"River"in"Pico"Rivera,"California.""The"pipeline"will"transport"brine"from"the"proposed" Advanced" Water" Treatment" Facility" (AWTF)" to" a" sewer" alignment" operated" by" the" Los" Angeles" County" Sanitation" Districts" (LACSD)." " " The" pipeline" will" be" constructed" in" a" pipe" zone"consisting"of"20+"feet"of"very"loose"to"loose"sand"using"a"combination"of"cut"and"cover" and"trenchless"technologies"beneath"heavy"traffic"along"Beverly"Blvd.""OGI"provided"field" exploration," laboratory" testing," geotechnical" evaluation," and" design" parameters" for" the" pipeline" design" and" installation" and" pavement" design" for" redesign" of" road" ways" and" intersections"impacted"during"construction." Piru) Solar) Power) Plant,) United) Water) Conservation) District) (UWCD).) ) ) UWCD" is" planning" a" solar" power" plant" on" an" existing" dormant" surface" water" spreading" grounds" underlain"by"granular"soils"with"abundant"gravel,"cobbles,"and"boulders"near"Piru,"California." OGI"performed"a"geotechnical"study"to"characterize"the"subsurface"conditions"and"provide" geotechnical"design"recommendations"for"the"solar"array"and"support"facilities"and"to"assist" the" project" designer" in" selection" of" an" appropriate" foundation" system" in" the" cobble" and" boulder"alluvial"environment."" Santa)Ana)Road)Widening,)County)of)Ventura)Public)Works)Agency,)Transportation) Department.))The"Transportation"Department"is"currently"designing"a"road"widening"project" to" accommodate" bike" lanes" along" a" 5.56mile" reach" of" Santa" Ana" Road" between" Casitas" Vista"Road"on"the"southern"end"and"State"Route"150"on"the"northern"end.""The"estimated" project"cost"is"approximately"6"million"dollars.""The"existing"about"256foot"wide"roadway"will" be" widened" by" 6" feet" using" a" combination" of" single" and" multiple" lane" widenings" and" restriping" to" create" safe" bike" travel" lanes." " The" subsurface" site" conditions" along" the" alignment" were" explored" by" test" pits" to" characterize" the" near" surface" earth" materials," perform"R6value"testing"for"the"roadway"design,"and"provide"earthwork"recommendations"for" the"bike"lane"construction.""" Moorpark) Tract) 5187) Water) Tank) Geotechnical) Review,) County) of) Ventura) Public) Works) Agency,) Water) &) Sanitation) Department.) ) The" Water" &" Sanitation" Department" (W&SD)"is"responsible"for"delivery"of"potable"water"in"the"Moorpark"area"and"is"currently" involved"in"design"of"a"16million"gallon"above"ground,"steel"water"storage"tank"on"a"hillside" Tract" site" to" add" capacity" to" their" system." " OGI" was" retained" to" provide" third" party" geotechnical" review," evaluation," and" consultation" to" the" W&SD" on" the" project" including" geotechnical" input" associated" with" tank" construction," tank" foundation" conditions," site" grading," slope" stability" of" graded" and" natural" slopes," and" pipeline" construction" on" the" relatively" steep" access" road." " OGI" reviewed" select" geotechnical" data" from" previous" geotechnical"consultants"for"the"Tract,"the"current"project"geotechnical"engineer,"and"worked" with" the" W&SD" and" project" developer" to" provide" a" project" design" in" conformance" with" current"building"code"and"regulations."" ) )
! Oakridge)Geoscience,)Inc.)–)Project)Descriptions)) 2" Bell) Canyon) High) Pressure) Pipeline,) Construction) Materials) Testing,) County) of) Ventura)Public)Works)Agency,)Water)&)Sanitation)Department.))OGI"was"retained"by" Ventura" County" W&SD" to" provide" construction" materials" testing" of" soil" backfill" used" to" construct" the" pipeline" and" associated" vaults." " OGI" provided" services" on" an" on6call" basis" working"with"the"Ventura"County"inspector." Bentley) Ranch) Agricultural) Pond,) Ojai." " The" project" consists" of" design" of" a" 10+" acre" agricultural" water" storage" pond" within" a" gently" sloping" natural" drainage" with" shallow" groundwater"conditions"on"the"Bentley"Ranch.""OGI"was"retained"to"conduct"a"geotechnical" study"to"evaluate"the"subsurface"geotechnical"conditions"at"the"proposed"pond"excavation" site,"provide"geotechnical"recommendations"for"the"pond"design,"and"geotechnical"input"to" the"project"designer"on"plans"and"specifications.""Our"work"scope"included"logging"test"pits," performing" laboratory" testing" to" classify" the" onsite" earth" materials," and" providing" geotechnical" parameters" to" support" the" project" design." " Geotechnical" design" parameters" were" developed" for" a" clay" layer" utilizing" onsite" soil" materials" as" well" as" a" synthetic" liner.""" Shallow" perched" groundwater" elevations" and" site" conditions" were" modeled" based" on" the" findings"of"the"field"exploration"to"assist"the"design"team"in"optimizing"the"pond"location"and" design." Ayers)Avenue)Sewer)Pipeline)Scale)Evaluation,)Ojai)Valley)Sanitary)District)(OVSD))–" OVSD" experienced" sewer" pipeline" blockages" during" pipeline" cleaning" operations" in" early" 2015"due"to"excessive"scale"buildup.""The"scale"was"up"to"quarter6inch6thick"and"formed" within" the" upper" two6thirds" of" the" vitrified" clay" pipelines" (VCP)" above" the" low6flow" line" in" portions"of"the"District’s"service"area.""OGI"was"retained"to"evaluate"the"subsurface"geologic" and"groundwater"conditions"in"the"vicinity"of"the"Ayers"Avenue"sewer"alignment"in"an"effort" to" determine" the" cause(s)" of" scale" formation" within" the" pipeline," evaluate" potential" mitigations"that"may"be"effective"in"curtailing"or"slowing"future"scale"formation,"and"evaluate" the"geochemical"and"mineralogical"properties"of"the"existing"scale"for"potential"removal"of" the"scale"using"chemical"methods.""Laboratory"mineralogy"testing"indicated"that"the"scale"is" calcium"carbonate,"a"common"scale"forming"mineral"in"pipelines.""Based"on"our"evaluation," the" scale" formation" is" caused" by" infiltration" of" high" mineral" content" groundwater" into" the" joints"of"the"VCP"and"manholes.""Mechanical"and"chemical"(acid"washing)"treatment"options" were"researched"to"evaluate"the"most"effective"scale"removal"options.""OVSD"elected"to"use" mechanical" cleaning" methods" prior" to" lining" the" VCP" with" a" cast6in6place6pipe" (CIPP)" system.""The"CIPP"system"will"reduce"groundwater"infiltration"into"the"sewer"pipe"and"arrest" scale"formation.)) Lindero)Canyon)Pipeline)Project)–)Phoenix)Engineering)X)Calleguas)Municipal)Water) District) (CMWD)) –" Preliminary" geotechnical" study" to" characterize" the" subsurface" site" conditions" and" provide" recommendations" for" the" final" geotechnical" study" for" a" 7,0006foot6 long," 246inch" diameter" potable" water" pipeline" and" associated" pump/pressure" reducing" station." " The" pipeline" will" provide" an" interconnection" between" the" CMWD" and" the" Las" Virgenes"Municipal"Water"District"(LVMWD).)" ) )
! Oakridge)Geoscience,)Inc.)–)Project)Descriptions)) 3" East) Access) Road) and) Drainage) Project,) Toland) Road) Landfill,) Ventura) Regional) Sanitation)District)–"OGI"provided"geologic"mapping,"field"grading"observations"and"slope" stability"consultation"during"construction"of"the"East"Access"Road"project"at"the"Toland"Road" Landfill.""Geologic"data"for"the"site"development"is"part"of"the"overall"quality"assurance"report" required" for" Regional" Water" Quality" Control" Board" (LARWQCB)" approval" of" the" project.""" OGI" staff" performed" geologic" mapping" during" construction" and" geologic" input" on" keyway" suitability," fill" placement," and" slope" stability" of" the" cut" slopes" to" meet" project" criteria" and" RWQCB"guidelines." Proposed) Drill) Cuttings) Disposal) Site) Grimes) Canyon) Well) Field,) Kennedy/Jenks) Consultants) X) Calleguas) Municipal) Water) District) –" OGI" performed" subsurface" exploration," geologic" mapping," historical" aerial" photographic" evaluation," and" review" of" previous" geotechnical" reports" for" the" site" to" characterize" the" geologic/geotechnical" conditions." " The" project" memorandum" provided" opinions" on" existing" site" conditions" and" proposed" rehabilitation" grading" of" an" existing" earthen" basin" for" use" as" drill" cuttings" holding/disposal"site"for"deep"monitoring"wells." Emergency)Generator)Facility,)Grimes)Canyon)Wellfield,)Kennedy/Jenks)Consultants)X) Calleguas) Municipal) Water) District) –" OGI" performed" a" geotechnical" study"that" included" subsurface" exploration," laboratory" testing," and" geotechnical" analyses" for" the" proposed" emergency" generator" facility." " The" study" provided" geotechnical" recommendations" for" foundation"design,"site"development,"and"grading"for"the"new"facility.)) Tapia)Wastewater)Treatment)Plant,)RAS)Pump)Station)Settlement)Study,)Las)Virgenes) Municipal)Water)District)–"OGI"evaluated"the"apparent"causes"of"the"settlement"for"the"256 year" old" RAS" Pump" Station" Addition." " Currently" OGI" is" performing" quarterly" survey" monitoring"of"the"pump"station"to"evaluate"if"settlement"is"continuing.""Data"from"the"survey" monitoring"will"be"utilized"by"LVMWD"to"evaluate"settlement"mitigation"options"including"re6 leveling" of" the" existing" pump" station" using" pressure" grouting/mud" jacking" or" pump" station" replacement.)) McGrath)State)Beach)Park)Restoration,)CBEC/Eco)Engineering)X)State)of)California)–) OGI) prepared" a) preliminary" geotechnical" study" which" included" field" exploration" and" laboratory"testing"for"the"planned"relocation"of"the"McGrath"State"Beach"Campground.""This" study"was"funded"by"a"State"of"California"grant"to"relocate"the"existing"campground"to"an" area"less"prone"to"water"inundation"and"restore"the"estuarine"habitat"near"the"mouth"of"the" Santa"Clara"River."" Marina) Park) Restroom) Addition,) City) of) Ventura) –" Geotechnical" report" to" evaluate" the" subsurface" geologic" and" geotechnical" conditions" for" the" proposed" restroom" expansion" at" Marina"Park"in"Ventura,"California"and"provide"geotechnical"recommendations"for"foundation" design,"site"development,"and"grading"for"the"new"facility." Arroyo) Vista) Community) Park) Parking) Lot) Expansion) Project,) City) of) Moorpark) X" Geotechnical"study"to"for"evaluation"and"design"of"an"asphalt"concrete"parking"lot"expansion" project"and"associated"storm"water"infiltration"BMP."
! Oakridge)Geoscience,)Inc.)–)Project)Descriptions)) 4" Phase) 2B) Slope) Erosion) and) Repair) Evaluation,) Toland) Road) Landfill,) Ventura) Regional)Sanitation)District)–"OGI"is"providing"geologic"mapping,"slake"jar"and"slake"index" laboratory" testing," evaluations" on" the" potential" cause(s)" of" the" slope" instability" that" has" occurred" since" construction" of" the" slope" in" the" late" 1990’s," and" input" on" slope" stability" evaluations"potential"repair"mitigations.""" McWane)Temporary)Car)Parking,)Jensen)Design)and)Survey,)Oxnard)–)OGI"is"providing" observation"of"site"grading,"compaction"testing"of"the"subgrade"soil,"and"documentation"for" an"about"136acre"temporary"car"parking"site"in"Oxnard." Aerially) Deposited) Lead) Study,) Westlake) Boulevard) Sidewalk) Improvement) Project,) Thousand) Oaks) –) OGI" is" providing" sampling" for" aerially" deposited" lead" for" the" City’s" sidewalk"improvement"project"along"Westlake"Boulevard"within"Caltrans"ROW." Construction) Materials) Testing) and) Engineering,) Ojai) Valley) Sanitary) District) WWTP) Drying)Beds)Modification)and)Rice)Road)Sewer)Project)–)Construction"materials"testing" services" including" field" compaction" and" R6value" testing," asphalt" concrete" testing" during" placement,"and"a"summary"report." OnXcall) Testing) Services,) City) of) Santa) Paula) Sidewalk) Repair) Project) –) OGI" has" contracted" with" the" City" of" Santa" Paula" to" provide" on6call" construction" materials" testing" services"for"their"City6wide"sidewalk"replacement"program."

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OGI_SOQv2.1

  • 1.
    ! ! ! Oakridge)Geoscience,)Inc.)2)Statement)of)Qualifications) ) Oakridge)Geoscience,)Inc.) 1098%Deseo%Avenue% Camarillo,%California%93010% www.Oakridgegeo.com% Lori)Prentice,)CEG% President% 805A368A7765% Lori@Oakridgegeo.com%% Craig)Prentice,)CEG% Principal% 805A400A0867% Craig@Oakridgegeo.com%% Who)We)Are:! Oakridge!Geosciences,!Inc.!(OGI)!is!a!small,!State!of!California!and! Federal! certified! woman<owned!business! based! in! Camarillo,! California.!! We!were!incorporated!in!Fall!of!2014!and!provide!high!quality!geologic!and! geotechnical! engineering! services! to! public! agencies,! architecture! and! engineering!(A/E)!design!firms,!and!the!energy/oil!and!gas!markets.!!OGI!is! managed!by!two!principal!engineering!geologists,!both!with!over!30!years! of! geologic! and! geotechnical! engineering! experience,! primarily! in! the! central! coastal! areas! of! California.! ! Our! goals! are! to! provide! superior! geoscience!services!to!our!clients,!to!be!our!client’s!geoscience!provider!of! choice,!and!to!conduct!our!business!in!a!respectful!manner!and!in!such!a! way!that!we!can!be!proud!of!each!of!our!accomplishments,!large!or!small.!! Key!factors!in!our!quest!is!to!embrace!quality!assurance!and!quality!control! in!every!step!of!our!work!process,!from!initial!client!interaction!and!meeting,! through! proposal! stages,! contracting,! project! work,! reporting,! and! project! wrap<up.!!Our!staff!is!focused,!attentive!to!client!needs,!and!always!ready! to!meet!your!project!objectives.! Project)Experience:) Our!project!experience!focuses!on!Public!Works!infrastructure!including:! • Desktop!geologic/geotechnical!siting!studies!for!preliminary! planning!of!infrastructure!projects,!and!! • Design<level!geotechnical!studies!for:! ! Water/wastewater!facilities,!! ! Small<!to!large<diameter!pipelines!using!conventional!cut<and< cover!construction!as!well!as!trenchless!technologies,!! ! Transportation,!roadways,!bridges,!soundwalls,!and!bike!paths,! ! Hospitals,!schools,!jail/prison!facilities,! ! Flood!control/levees,! ! Stormwater!BMPs/infiltration!evaluation,! ! Above<!and!below<ground!reservoirs,! ! Above<!and!below<grade!foundations!for!buildings,!plant!facilities,! vaults,!etc.,!and! ! Water!resources.! Services:) Our!services!include:! • Engineering!Geology!–!seismic! hazard!assessments,!fault! evaluations,!landslide! evaluations! • Geotechnical!Engineering! • Project/Site!Management! • Construction!Materials! Engineering!and!Testing! • Geotechnical!Laboratory! Testing! • Geotechnical!and!Geologic! Reviews! Staff)Highlights:) Lori) Prentice,) PG,) CEG,% President.! ! Lori! is! responsible! for! overall! company! operations,! planning,! and! financial! direction.! ! Lori! has! over! 30! years! of! local! and! international! experience! managing! and! directing! geologic! and! geotechnical! infrastructure! projects.! ! Her! experience! provides! unique! insight! into! successful! engineering!geology!and!geotechnical!aspects!of!a!wide!variety!of!projects.! Craig) Prentice,) PG,) CEG,) Principal.! !Craig! brings! over!30!years!of! experience!performing!and! managing! geotechnical!projects!throughout!California!with!a!focus!on!the!central!coast.!!Project!sizes!range!from!$5,000! reconnaissance! studies! to! multiple! million! dollar! infrastructure! design/construction.! ! He! has! managed! geotechnical! groups! of! 30+! professionals! but! maintains! and! active! involvement! in! design! and! construction! projects.!!In!addition!to!his!engineering!geology!role,!Craig!is!our!risk!manager!and!contract!administrator.!! Tony)Robinson,)PhD,)CEG,)GE.!!Tony!brings!over!35!years!of!geotechnical!experience!on!the!central!coast! covering!a!wide!variety!of!projects.!!His!extensive!experience!includes!both!geologic!and!geotechnical!projects! from!design!through!construction.! Certifications:) We!proudly!hold!the!following:! DBE!Firm!No.!42650!(Federal)! SWBE!Firm!No.!42650!(State)! SBE!Firm!No.!1795788!(State)!
  • 2.
    ! Oakridge)Geoscience,)Inc.)–)Project)Descriptions)) 1" Brine) Disposal) Pipeline,)Water) Replenishment) District) of) Southern) California,) GHD/KEH) Associates.) ) Geotechnical" study" for" an" 1,8006foot" long," 126inch" diameter" high" density" polyethylene" (HDPE)" pipeline" beneath" San" Gabriel" River" Parkway" near" the" San" Gabriel"River"in"Pico"Rivera,"California.""The"pipeline"will"transport"brine"from"the"proposed" Advanced" Water" Treatment" Facility" (AWTF)" to" a" sewer" alignment" operated" by" the" Los" Angeles" County" Sanitation" Districts" (LACSD)." " " The" pipeline" will" be" constructed" in" a" pipe" zone"consisting"of"20+"feet"of"very"loose"to"loose"sand"using"a"combination"of"cut"and"cover" and"trenchless"technologies"beneath"heavy"traffic"along"Beverly"Blvd.""OGI"provided"field" exploration," laboratory" testing," geotechnical" evaluation," and" design" parameters" for" the" pipeline" design" and" installation" and" pavement" design" for" redesign" of" road" ways" and" intersections"impacted"during"construction." Piru) Solar) Power) Plant,) United) Water) Conservation) District) (UWCD).) ) ) UWCD" is" planning" a" solar" power" plant" on" an" existing" dormant" surface" water" spreading" grounds" underlain"by"granular"soils"with"abundant"gravel,"cobbles,"and"boulders"near"Piru,"California." OGI"performed"a"geotechnical"study"to"characterize"the"subsurface"conditions"and"provide" geotechnical"design"recommendations"for"the"solar"array"and"support"facilities"and"to"assist" the" project" designer" in" selection" of" an" appropriate" foundation" system" in" the" cobble" and" boulder"alluvial"environment."" Santa)Ana)Road)Widening,)County)of)Ventura)Public)Works)Agency,)Transportation) Department.))The"Transportation"Department"is"currently"designing"a"road"widening"project" to" accommodate" bike" lanes" along" a" 5.56mile" reach" of" Santa" Ana" Road" between" Casitas" Vista"Road"on"the"southern"end"and"State"Route"150"on"the"northern"end.""The"estimated" project"cost"is"approximately"6"million"dollars.""The"existing"about"256foot"wide"roadway"will" be" widened" by" 6" feet" using" a" combination" of" single" and" multiple" lane" widenings" and" restriping" to" create" safe" bike" travel" lanes." " The" subsurface" site" conditions" along" the" alignment" were" explored" by" test" pits" to" characterize" the" near" surface" earth" materials," perform"R6value"testing"for"the"roadway"design,"and"provide"earthwork"recommendations"for" the"bike"lane"construction.""" Moorpark) Tract) 5187) Water) Tank) Geotechnical) Review,) County) of) Ventura) Public) Works) Agency,) Water) &) Sanitation) Department.) ) The" Water" &" Sanitation" Department" (W&SD)"is"responsible"for"delivery"of"potable"water"in"the"Moorpark"area"and"is"currently" involved"in"design"of"a"16million"gallon"above"ground,"steel"water"storage"tank"on"a"hillside" Tract" site" to" add" capacity" to" their" system." " OGI" was" retained" to" provide" third" party" geotechnical" review," evaluation," and" consultation" to" the" W&SD" on" the" project" including" geotechnical" input" associated" with" tank" construction," tank" foundation" conditions," site" grading," slope" stability" of" graded" and" natural" slopes," and" pipeline" construction" on" the" relatively" steep" access" road." " OGI" reviewed" select" geotechnical" data" from" previous" geotechnical"consultants"for"the"Tract,"the"current"project"geotechnical"engineer,"and"worked" with" the" W&SD" and" project" developer" to" provide" a" project" design" in" conformance" with" current"building"code"and"regulations."" ) )
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    ! Oakridge)Geoscience,)Inc.)–)Project)Descriptions)) 2" Bell) Canyon) High)Pressure) Pipeline,) Construction) Materials) Testing,) County) of) Ventura)Public)Works)Agency,)Water)&)Sanitation)Department.))OGI"was"retained"by" Ventura" County" W&SD" to" provide" construction" materials" testing" of" soil" backfill" used" to" construct" the" pipeline" and" associated" vaults." " OGI" provided" services" on" an" on6call" basis" working"with"the"Ventura"County"inspector." Bentley) Ranch) Agricultural) Pond,) Ojai." " The" project" consists" of" design" of" a" 10+" acre" agricultural" water" storage" pond" within" a" gently" sloping" natural" drainage" with" shallow" groundwater"conditions"on"the"Bentley"Ranch.""OGI"was"retained"to"conduct"a"geotechnical" study"to"evaluate"the"subsurface"geotechnical"conditions"at"the"proposed"pond"excavation" site,"provide"geotechnical"recommendations"for"the"pond"design,"and"geotechnical"input"to" the"project"designer"on"plans"and"specifications.""Our"work"scope"included"logging"test"pits," performing" laboratory" testing" to" classify" the" onsite" earth" materials," and" providing" geotechnical" parameters" to" support" the" project" design." " Geotechnical" design" parameters" were" developed" for" a" clay" layer" utilizing" onsite" soil" materials" as" well" as" a" synthetic" liner.""" Shallow" perched" groundwater" elevations" and" site" conditions" were" modeled" based" on" the" findings"of"the"field"exploration"to"assist"the"design"team"in"optimizing"the"pond"location"and" design." Ayers)Avenue)Sewer)Pipeline)Scale)Evaluation,)Ojai)Valley)Sanitary)District)(OVSD))–" OVSD" experienced" sewer" pipeline" blockages" during" pipeline" cleaning" operations" in" early" 2015"due"to"excessive"scale"buildup.""The"scale"was"up"to"quarter6inch6thick"and"formed" within" the" upper" two6thirds" of" the" vitrified" clay" pipelines" (VCP)" above" the" low6flow" line" in" portions"of"the"District’s"service"area.""OGI"was"retained"to"evaluate"the"subsurface"geologic" and"groundwater"conditions"in"the"vicinity"of"the"Ayers"Avenue"sewer"alignment"in"an"effort" to" determine" the" cause(s)" of" scale" formation" within" the" pipeline," evaluate" potential" mitigations"that"may"be"effective"in"curtailing"or"slowing"future"scale"formation,"and"evaluate" the"geochemical"and"mineralogical"properties"of"the"existing"scale"for"potential"removal"of" the"scale"using"chemical"methods.""Laboratory"mineralogy"testing"indicated"that"the"scale"is" calcium"carbonate,"a"common"scale"forming"mineral"in"pipelines.""Based"on"our"evaluation," the" scale" formation" is" caused" by" infiltration" of" high" mineral" content" groundwater" into" the" joints"of"the"VCP"and"manholes.""Mechanical"and"chemical"(acid"washing)"treatment"options" were"researched"to"evaluate"the"most"effective"scale"removal"options.""OVSD"elected"to"use" mechanical" cleaning" methods" prior" to" lining" the" VCP" with" a" cast6in6place6pipe" (CIPP)" system.""The"CIPP"system"will"reduce"groundwater"infiltration"into"the"sewer"pipe"and"arrest" scale"formation.)) Lindero)Canyon)Pipeline)Project)–)Phoenix)Engineering)X)Calleguas)Municipal)Water) District) (CMWD)) –" Preliminary" geotechnical" study" to" characterize" the" subsurface" site" conditions" and" provide" recommendations" for" the" final" geotechnical" study" for" a" 7,0006foot6 long," 246inch" diameter" potable" water" pipeline" and" associated" pump/pressure" reducing" station." " The" pipeline" will" provide" an" interconnection" between" the" CMWD" and" the" Las" Virgenes"Municipal"Water"District"(LVMWD).)" ) )
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    ! Oakridge)Geoscience,)Inc.)–)Project)Descriptions)) 3" East) Access) Road)and) Drainage) Project,) Toland) Road) Landfill,) Ventura) Regional) Sanitation)District)–"OGI"provided"geologic"mapping,"field"grading"observations"and"slope" stability"consultation"during"construction"of"the"East"Access"Road"project"at"the"Toland"Road" Landfill.""Geologic"data"for"the"site"development"is"part"of"the"overall"quality"assurance"report" required" for" Regional" Water" Quality" Control" Board" (LARWQCB)" approval" of" the" project.""" OGI" staff" performed" geologic" mapping" during" construction" and" geologic" input" on" keyway" suitability," fill" placement," and" slope" stability" of" the" cut" slopes" to" meet" project" criteria" and" RWQCB"guidelines." Proposed) Drill) Cuttings) Disposal) Site) Grimes) Canyon) Well) Field,) Kennedy/Jenks) Consultants) X) Calleguas) Municipal) Water) District) –" OGI" performed" subsurface" exploration," geologic" mapping," historical" aerial" photographic" evaluation," and" review" of" previous" geotechnical" reports" for" the" site" to" characterize" the" geologic/geotechnical" conditions." " The" project" memorandum" provided" opinions" on" existing" site" conditions" and" proposed" rehabilitation" grading" of" an" existing" earthen" basin" for" use" as" drill" cuttings" holding/disposal"site"for"deep"monitoring"wells." Emergency)Generator)Facility,)Grimes)Canyon)Wellfield,)Kennedy/Jenks)Consultants)X) Calleguas) Municipal) Water) District) –" OGI" performed" a" geotechnical" study"that" included" subsurface" exploration," laboratory" testing," and" geotechnical" analyses" for" the" proposed" emergency" generator" facility." " The" study" provided" geotechnical" recommendations" for" foundation"design,"site"development,"and"grading"for"the"new"facility.)) Tapia)Wastewater)Treatment)Plant,)RAS)Pump)Station)Settlement)Study,)Las)Virgenes) Municipal)Water)District)–"OGI"evaluated"the"apparent"causes"of"the"settlement"for"the"256 year" old" RAS" Pump" Station" Addition." " Currently" OGI" is" performing" quarterly" survey" monitoring"of"the"pump"station"to"evaluate"if"settlement"is"continuing.""Data"from"the"survey" monitoring"will"be"utilized"by"LVMWD"to"evaluate"settlement"mitigation"options"including"re6 leveling" of" the" existing" pump" station" using" pressure" grouting/mud" jacking" or" pump" station" replacement.)) McGrath)State)Beach)Park)Restoration,)CBEC/Eco)Engineering)X)State)of)California)–) OGI) prepared" a) preliminary" geotechnical" study" which" included" field" exploration" and" laboratory"testing"for"the"planned"relocation"of"the"McGrath"State"Beach"Campground.""This" study"was"funded"by"a"State"of"California"grant"to"relocate"the"existing"campground"to"an" area"less"prone"to"water"inundation"and"restore"the"estuarine"habitat"near"the"mouth"of"the" Santa"Clara"River."" Marina) Park) Restroom) Addition,) City) of) Ventura) –" Geotechnical" report" to" evaluate" the" subsurface" geologic" and" geotechnical" conditions" for" the" proposed" restroom" expansion" at" Marina"Park"in"Ventura,"California"and"provide"geotechnical"recommendations"for"foundation" design,"site"development,"and"grading"for"the"new"facility." Arroyo) Vista) Community) Park) Parking) Lot) Expansion) Project,) City) of) Moorpark) X" Geotechnical"study"to"for"evaluation"and"design"of"an"asphalt"concrete"parking"lot"expansion" project"and"associated"storm"water"infiltration"BMP."
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    ! Oakridge)Geoscience,)Inc.)–)Project)Descriptions)) 4" Phase) 2B) Slope)Erosion) and) Repair) Evaluation,) Toland) Road) Landfill,) Ventura) Regional)Sanitation)District)–"OGI"is"providing"geologic"mapping,"slake"jar"and"slake"index" laboratory" testing," evaluations" on" the" potential" cause(s)" of" the" slope" instability" that" has" occurred" since" construction" of" the" slope" in" the" late" 1990’s," and" input" on" slope" stability" evaluations"potential"repair"mitigations.""" McWane)Temporary)Car)Parking,)Jensen)Design)and)Survey,)Oxnard)–)OGI"is"providing" observation"of"site"grading,"compaction"testing"of"the"subgrade"soil,"and"documentation"for" an"about"136acre"temporary"car"parking"site"in"Oxnard." Aerially) Deposited) Lead) Study,) Westlake) Boulevard) Sidewalk) Improvement) Project,) Thousand) Oaks) –) OGI" is" providing" sampling" for" aerially" deposited" lead" for" the" City’s" sidewalk"improvement"project"along"Westlake"Boulevard"within"Caltrans"ROW." Construction) Materials) Testing) and) Engineering,) Ojai) Valley) Sanitary) District) WWTP) Drying)Beds)Modification)and)Rice)Road)Sewer)Project)–)Construction"materials"testing" services" including" field" compaction" and" R6value" testing," asphalt" concrete" testing" during" placement,"and"a"summary"report." OnXcall) Testing) Services,) City) of) Santa) Paula) Sidewalk) Repair) Project) –) OGI" has" contracted" with" the" City" of" Santa" Paula" to" provide" on6call" construction" materials" testing" services"for"their"City6wide"sidewalk"replacement"program."