Mapping and Spatial Services

Oso Flaco Lakes Assessment and Planning

Representative Project: Oso Flaco Lakes Assessment and Planning
Services: Spatial Analysis - Interpolation
Client: Coastal San Luis Resource Conservation District

The two lakes have been identified as Section 303d impaired water bodies due to elevated concentrations of organochlorine pesticides, primarily DDT and dieldrin. Padre subcontracted with TEG Oceanographic Services to complete 17 sediment sample collection locations using a barge mounted vibracore sampling system. Sediments were collected in continuous cores ranging in depth from 3 to 6 feet at pre-determined locations within both lakes. Padre used the sample locations and associated results to build a GIS database. With the GIS database as an input, Padre conducted spatial analysis to model potential contaminant concentrations and sediment thicknesses across the lakes. This analysis generated a model of distribution of thickness and contamination across the water bodies. Figures were developed to visualize results and model outputs. The information gained from the sediment assessment activities will be used by the interested agencies to determine potential remedial options, including dredging, that could be implemented to improve the ecological health of the two lakes.

Guadalupe Restoration Project Cross-Sections

Representative Project: Guadalupe Restoration Project Cross-Sections
Services: Cross-Section Development
Client: Chevron Environmental Management Company

Padre leveraged the power of spatial databases and Bentley’s gINT software to develop cross-sections. Inputs from drill hole logs were loaded directly into a spatially enabled database that was then used to automatically export accurately scaled depictions of surface terrain, drill hole locations and other input intersections. The gINT software integrates into both GIS and CAD environments enabling the development of accurate, informative, and aesthetically pleasing subsurface depictions. These cross-sections were an important analytical component in designing remediation strategies and grading plans.

Historical Areas of Concern Mapping and Sampling Design

Representative Project: Historical Areas of Concern Mapping and Sampling Design
Services: Database Development / Spatial Analysis – Overlay Analysis
Client: Various

Padre acquires and geo-references historical aerial imagery spanning decades. Each image is reviewed to create a spatial database of areas of potential concern (AOPCs). Often features seen in historical images no longer exist and are not apparent during a field visit. Mapping and cataloguing attributes of historical features is an important step in identifying areas to sample and focus remediation efforts. Mapped AOPCs act as a guide for sampling design. Padre leverages high accuracy GPS technology to navigate to proposed sample locations and collect ‘as-built’ sampling locations. Sampling locations and their analytical results are fed back into the project spatial database. The bolstered spatial database of AOPCs, sample locations and results are then used to create maps and cross-sections to plan for remediation design.

San Luis Obispo Tank Farm

Representative Project: San Luis Obispo Tank Farm
Representative Services: GIS Viewer Deployment / Field Data Collection
Client: Chevron Environmental Management Company

Padre has leveraged the power of the ArcGIS Online platform to open spatial data available to all project staff in a secure environment. Complex spatial databases are presented in a beautiful and intuitive manner to enable non-GIS professionals to interact with spatial data anywhere. Padre staff are able to securely log in to view GIS data, view attributes to understand spatial relationships. Padre also uses Collector to extend the ArcGIS Online application from the office to the field. Using Collector and ArcGIS Online, staff can take their interactive maps into the field to navigate and collect new data using tablets and phones coupled with a high accuracy receiver. Field collected data are then synced and available for view in the office via ArcGIS Online. These tools have helped to increase Padre’s efficacy in collecting field data and using spatial data for decision making and ultimately better serving our client.