infiltration testing

ACT ONE & Associates is a woman-owned consulting engineering and surveying firm located in Harrisburg, Pennsylvania, established in 2012 as T L SHAFFER LLC dba ACT ONE & ASSOCIATES. It is a certified WBE/DBE firm serving builders, contractors, developers, engineers, property owners, institutions, and municipalities in Central PA.

Act 537 sewage facilities planningALTA/ACSM land title surveysBoundary and Topographic Surveysconstruction stakeoutFEMA Elevation CertificatesInfrastructure design and analysisland surveyingMS4 assistanceNPDES design and permittingOn-lot sewage disposal system designPhase I Environmental Site Assessmentsright-of-way surveyssoil analysesSPCC plansSpecification preparation and contract administrationstormwater managementSubdivision and land development surveyssubdivision planningWater and wastewater engineering

A.D. Marble is an environmental, cultural, and water resources engineering firm and a DBE/MBE/WBE firm. Its mission is to be a leader in the environmental, cultural, and water resources engineering fields through a sustainability mindset. It serves markets including construction services, energy, federal, highway and bridges, public private partnerships, trails and recreation, transit, water, and sustainability.

ArchaeologyCADD/GIScommunications designdrone aerial photographyecologyerosion and sediment controlfarmland assessmentshazardous waste handlingLandscape ArchitectureNEPA documentationNPDES permittingpublic involvement and agency coordinationSection 4(f) EvaluationsThreatened and Endangered Species Monitoringvisual site inspectionsWater resources engineeringwetland and stream mitigation monitoringWetlandswildlife and forest management

AESCO is a multifaceted engineering, inspections, and testing company based in Huntington Beach, California, operating since 1993. Its team of professional engineers, geologists, technicians, and specialists provides geotechnical engineering, environmental engineering, construction inspections, materials testing, and quality validation/control/assurance services. AESCO is a WBE/DBE/SBE company and operates a construction materials engineering laboratory certified by DSA, Caltrans, and the City of Los Angeles.

foundation designgeotechnical drilling and field explorationgeotechnical forensicsgroundwater hydrologyhazardous material assessmentliquefaction potential analysisMethane and Soil Gas MitigationPhase I/Phase II ESAsettlement and vibration monitoringslope stability analysis

Associated Earth Sciences, Inc. (AESI) is a multi-disciplinary professional consulting firm that has provided integrated geotechnical engineering, geophysical, and hydrogeological services in the Pacific Northwest since 1981 to clients in both the private and public sectors. AESI's staff of approximately 70 includes geotechnical engineers, licensed geologists, hydrogeologists, and geophysicists.

construction observationGeologic assessmentgeophysicsgeotechnical engineeringgeotechnical testinghydrogeologysubsurface exploration

CDIM is an environmental engineering firm formed in 2016 in San Francisco, California, providing environmental engineering services to construction, development, industrial and municipal clients throughout the Bay Area. Its service offerings include storm water engineering and compliance, site assessment, remediation, environmental and civil engineering, environmental regulatory compliance, air quality, planning and permitting, and environmental project management.

Air Qualityenvironmental and civil engineeringenvironmental project managementestuarine sampling and monitoringHydrologic and hydraulic modelingplanning and permittingRegulatory Complianceremediationsite assessmentstorm water engineering and complianceSWPPP preparation

CGC Geoservices, LLC is a geotechnical and environmental drilling and geotechnical engineering consulting firm in business since 2008. Led by engineers, its staff includes experienced drillers, construction managers, geologists and engineers. The firm is a women-owned business enterprise with offices in Newark, DE; West Deptford, NJ; and Bel Air, MD, serving the mid-Atlantic region. In January 2021 it acquired Walton Corporation, a Delaware-based drilling firm with over 70 years of experience.

cone penetrometer testingenvironmental drillinggeotechnical drillinggeotechnical engineering consultingGeotechnical instrumentationgeothermal test well installationhollow stem augersinterior drillinglimited access drillingmud rotary drillingrock coringSPT samplingwater well installationwire line rock coring