diff --git a/app/bulk_persistence/__init__.py b/app/bulk_persistence/__init__.py
index d75320c60588cbc5b33040b314beb447667ceba1..3be6223fb3d4ea387159b0d3199ba3197964e3a0 100644
--- a/app/bulk_persistence/__init__.py
+++ b/app/bulk_persistence/__init__.py
@@ -17,13 +17,10 @@ from .bulk_filter import BulkReadFilters, BulkReadFilterOperator
 from .model_chunking import GetDataParams, DataframeBasicDescribe, DataframeDescribe
 from .dask.dask_bulk_storage import DaskBulkStorage
 from .dask.dask_bulk_storage_local import make_local_dask_bulk_storage
-from .dask.storage_path_builder import hash_record_id
-from .dask.traces import trace_dataframe_attributes, submit_with_trace, trace_attributes_root_span
 from .dataframe_persistence import create_and_store_dataframe, get_dataframe, download_bulk
 from .dataframe_serializer import DataframeSerializerAsync, DataframeSerializerSync
-from .dataframe_validators import auto_cast_columns_to_string, columns_type_must_be_string, DataFrameValidationFunc, no_validation
 from .json_orient import JSONOrient
-from .mime_types import MimeTypes, MimeType
+from .mime_types import MimeTypes
 from .tenant_provider import resolve_tenant
 from .exceptions import UnknownChannelsException, InvalidBulkException, NoBulkException, NoDataException, RecordNotFoundException
 from .consistency_checks import ConsistencyException, DataConsistencyChecks
@@ -33,7 +30,6 @@ from .capture_timings import capture_timings
 from .sessions_storage import Session, SessionsStorage, \
             SessionNotFound, SessionInvalidState, SessionUpdatedEtagUnmatched, SessionException, \
             SessionState, SessionUpdateMode, SessionInternal, CommitSessionResponse
-from .dask.errors import BulkError, BulkRecordNotFound, BulkCurvesNotFound, TooManyColumnsRequested, FilterError, internal_bulk_exceptions
 
 # TMP: this should probably not be exposed outside of the bulk_persistence package
 from .temp_dir import get_temp_dir
diff --git a/app/bulk_persistence/blob_storage.py b/app/bulk_persistence/blob_storage.py
index 95d69411236c9ad7d71601e401f63c1de1df3130..0bfd476a6ccf1db7b52217090978496929709ffa 100644
--- a/app/bulk_persistence/blob_storage.py
+++ b/app/bulk_persistence/blob_storage.py
@@ -52,7 +52,7 @@ from .mime_types import MimeType, MimeTypes
 # - using faster format, e.g. hd5
 # - threshold about the busyness of the service (if not busy and not huge data -> direct write)
 # - better proc fork and arg serialization
-from app.helper.traces import with_trace
+from ..helper.traces import with_trace
 
 
 def export_to_parquet(
diff --git a/app/bulk_persistence/capture_timings.py b/app/bulk_persistence/capture_timings.py
index fafe58ff13a1ed71c1fedf4cae7128d26eaf26f0..10e3f1e7723e50706e0a5e4d304bbcf40a141ffa 100644
--- a/app/bulk_persistence/capture_timings.py
+++ b/app/bulk_persistence/capture_timings.py
@@ -4,7 +4,7 @@ from functools import wraps
 import asyncio
 from time import perf_counter, process_time
 
-from app.helper.logger import get_logger
+from ..helper.logger import get_logger
 
 
 def make_log_captured_timing_handler(level=INFO):
diff --git a/app/bulk_persistence/dask/__init__.py b/app/bulk_persistence/dask/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..ab4e198a3be638df9e91aee2a28956d0c8f16e58 100644
--- a/app/bulk_persistence/dask/__init__.py
+++ b/app/bulk_persistence/dask/__init__.py
@@ -0,0 +1 @@
+from . import dask_config
diff --git a/app/bulk_persistence/dask/bulk_catalog.py b/app/bulk_persistence/dask/bulk_catalog.py
index 22e2b2d11a1ecaecc4be5f2cc7487fc54e0677b4..3f091266905db80f5b1107f3e2992c59e00c4cac 100644
--- a/app/bulk_persistence/dask/bulk_catalog.py
+++ b/app/bulk_persistence/dask/bulk_catalog.py
@@ -22,7 +22,7 @@ from contextlib import suppress
 from dataclasses import dataclass
 from typing import Dict, Iterable, List, NamedTuple, Optional, Set
 
-from app.helper.traces import with_trace
+from ...helper.traces import with_trace
 from ..capture_timings import capture_timings
 from .storage_path_builder import join, remove_protocol
 from .utils import worker_capture_timing_handlers
diff --git a/app/bulk_persistence/dask/session_file_meta.py b/app/bulk_persistence/dask/session_file_meta.py
index ae8f2faacd98a6b8910ed7d34710af152d6fed50..448bd1d479a74a1f8ffb13d39860b83e314c5405 100644
--- a/app/bulk_persistence/dask/session_file_meta.py
+++ b/app/bulk_persistence/dask/session_file_meta.py
@@ -23,8 +23,8 @@ from distributed.worker import get_client
 
 import pandas as pd
 from .utils import share_items
-from app.helper.logger import get_logger
-from app.helper.traces import with_trace
+from ...helper.logger import get_logger
+from ...helper.traces import with_trace
 from ..sessions_storage import Session
 from ..capture_timings import capture_timings
 
diff --git a/app/bulk_persistence/dask/utils.py b/app/bulk_persistence/dask/utils.py
index 06750ef66d2278b99ec33afd17d945022809a42e..350f1d736ed549197536c7008995c7d6f8ebfbdb 100644
--- a/app/bulk_persistence/dask/utils.py
+++ b/app/bulk_persistence/dask/utils.py
@@ -20,7 +20,7 @@ import dask.dataframe as dd
 import pandas as pd
 import pyarrow.parquet as pa
 
-from app.helper.logger import get_logger
+from ...helper.logger import get_logger
 from ..capture_timings import capture_timings
 
 
diff --git a/app/bulk_persistence/dataframe_persistence.py b/app/bulk_persistence/dataframe_persistence.py
index 89d5585aaf4aec1f36ddccdcd69387fc34f55b36..6f677a599982b6933ecdd81de15c9208b186ad3d 100644
--- a/app/bulk_persistence/dataframe_persistence.py
+++ b/app/bulk_persistence/dataframe_persistence.py
@@ -30,7 +30,7 @@ from .bulk_id import new_bulk_id
 from .dask.errors import internal_bulk_exceptions
 from .mime_types import MimeTypes, MimeType
 from .tenant_provider import resolve_tenant
-from app.helper.traces import with_trace
+from ..helper.traces import with_trace
 
 
 async def create_and_store_dataframe(ctx: Context, df: pd.DataFrame) -> str:
diff --git a/app/bulk_persistence/dataframe_serializer.py b/app/bulk_persistence/dataframe_serializer.py
index 84cdee1c7ac75374e4a87ad0e04122aff0a1f7b3..a2b059eab0cd6b7bf782877f7437b9b00f9411d6 100644
--- a/app/bulk_persistence/dataframe_serializer.py
+++ b/app/bulk_persistence/dataframe_serializer.py
@@ -24,7 +24,7 @@ from pydantic import BaseModel
 from .json_orient import JSONOrient
 from .mime_types import MimeTypes, MimeType
 from app.pool_executor import get_pool_executor
-from app.helper.traces import with_trace
+from ..helper.traces import with_trace
 
 
 class DataframeSerializerSync:
diff --git a/app/consistency/reference_check.py b/app/consistency/reference_check.py
index 40eb75f0bb83a1fed0dca0cd6e2c11f1bb8a3e55..a473d4eef3d01774979a3ca0bc63385b87b119cf 100644
--- a/app/consistency/reference_check.py
+++ b/app/consistency/reference_check.py
@@ -1,7 +1,7 @@
 import pandas as pd
 import math
 from pydantic import BaseModel
-from app.bulk_persistence import ConsistencyException, DataConsistencyChecks
+from app.bulk_persistence.consistency_checks import ConsistencyException, DataConsistencyChecks
 
 
 class ReferenceCurveException(ConsistencyException):
diff --git a/app/consistency/trajectory_consistency.py b/app/consistency/trajectory_consistency.py
index 205599fef106e6d7a29db9c259a6a6ee2ba3a757..982ee0487bf03f0af8c4f951160b54f5eedd1e5a 100644
--- a/app/consistency/trajectory_consistency.py
+++ b/app/consistency/trajectory_consistency.py
@@ -7,9 +7,10 @@ from odes_storage.models import Record
 
 from app.model.osdu_model import WellboreTrajectory110
 from app.helper.traces import with_trace
-from app.bulk_persistence import ConsistencyException, DataConsistencyChecks, \
-	BulkRecordNotFound, \
-	DaskBulkStorage, submit_with_trace
+from app.bulk_persistence.consistency_checks import ConsistencyException, DataConsistencyChecks
+from app.bulk_persistence.dask.dask_bulk_storage import BulkRecordNotFound
+from app.bulk_persistence import DaskBulkStorage
+from app.bulk_persistence.dask.traces import submit_with_trace
 from app.model.model_utils import from_record
 from app.context import get_ctx
 
diff --git a/app/consistency/welllog_consistency.py b/app/consistency/welllog_consistency.py
index 5409a8471652ec58ed5770c2159719128b844539..650d7c7a53cbe0bc67302dd7cdeb6d9a1ece9d0e 100644
--- a/app/consistency/welllog_consistency.py
+++ b/app/consistency/welllog_consistency.py
@@ -7,8 +7,10 @@ from dask.dataframe.core import DataFrame as DaskDataFrame
 from odes_storage.models import Record
 
 from app.helper.traces import with_trace
-from app.bulk_persistence import BulkRecordNotFound, \
-	DaskBulkStorage, ConsistencyException, DataConsistencyChecks, submit_with_trace
+from app.bulk_persistence.consistency_checks import ConsistencyException, DataConsistencyChecks
+from app.bulk_persistence.dask.dask_bulk_storage import BulkRecordNotFound
+from app.bulk_persistence import DaskBulkStorage
+from app.bulk_persistence.dask.traces import submit_with_trace
 from app.model.model_utils import from_record
 from app.model.osdu_model import WellLog110
 from app.context import get_ctx
diff --git a/app/model/log_bulk.py b/app/model/log_bulk.py
index acf15efa0b9183ee5a160e3d952dd461c69db204..1ab79edc1a7eb9a7d8a9ab657fb0750a936bd8ce 100644
--- a/app/model/log_bulk.py
+++ b/app/model/log_bulk.py
@@ -18,7 +18,7 @@ from jsonpath_ng import parse as parse_jsonpath
 from jsonpath_ng.jsonpath import Parent as JsonParent
 from odes_storage.models import Record
 
-from app.bulk_persistence import BulkURI
+from app.bulk_persistence.bulk_uri import BulkURI
 
 
 class LogBulkHelper:
diff --git a/app/routers/bulk/bulk_routes.py b/app/routers/bulk/bulk_routes.py
index 08f23c18ae198bfd65f7a5722ddefe1711494870..6f1c3d1ed5f46ce07970caf226ac7f05b663190c 100644
--- a/app/routers/bulk/bulk_routes.py
+++ b/app/routers/bulk/bulk_routes.py
@@ -57,16 +57,18 @@ from app.routers.sessions import (
 )
 
 # imports from bulk persistence
-from app.bulk_persistence import (auto_cast_columns_to_string,
-    DataFrameValidationFunc, no_validation,
-    JSONOrient,
-    get_dataframe, download_bulk,
-    DaskBulkStorage,
-    MimeTypes, MimeType,
-    trace_dataframe_attributes, trace_attributes_root_span,
-    BulkError, BulkRecordNotFound, FilterError, TooManyColumnsRequested,
-    DataConsistencyChecks
-                                  )
+from app.bulk_persistence.dataframe_validators import (auto_cast_columns_to_string,
+                                                       DataFrameValidationFunc,
+                                                       no_validation)
+from app.bulk_persistence import JSONOrient, get_dataframe, download_bulk
+from app.bulk_persistence import DaskBulkStorage
+from app.bulk_persistence.dask.errors import BulkError, BulkRecordNotFound, FilterError, TooManyColumnsRequested
+from app.bulk_persistence.mime_types import MimeTypes, MimeType
+from app.bulk_persistence.dask.traces import trace_dataframe_attributes, trace_attributes_root_span
+
+
+from app.bulk_persistence import DataConsistencyChecks
+
 
 router = APIRouter(route_class=TracingRoute)  # router dedicated to bulk APIs
 
diff --git a/app/routers/bulk/bulk_uri_dependencies.py b/app/routers/bulk/bulk_uri_dependencies.py
index 7840d07a3f94478a735afa2873817d9388b8fe0a..cc5923984cf733a40ca38e59e5ff96141643f471 100644
--- a/app/routers/bulk/bulk_uri_dependencies.py
+++ b/app/routers/bulk/bulk_uri_dependencies.py
@@ -3,7 +3,7 @@ from abc import ABC
 from typing import Optional
 from fastapi import Request
 
-from app.bulk_persistence import BulkURI
+from app.bulk_persistence.bulk_uri import BulkURI
 from app.model.log_bulk import LogBulkHelper
 
 
diff --git a/app/routers/bulk/utils.py b/app/routers/bulk/utils.py
index 2d50124571c24ac1b2cb9ee29964b09757d066bb..3351b6389b76952c36664f30e4a1e4c1a8978649 100644
--- a/app/routers/bulk/utils.py
+++ b/app/routers/bulk/utils.py
@@ -11,11 +11,16 @@ import dask.dataframe as dd
 import pandas as pd
 from pyarrow.lib import ArrowInvalid
 
-from app.bulk_persistence import DaskBulkStorage, DataframeSerializerAsync, \
-    MimeTypes, MimeType, JSONOrient, trace_dataframe_attributes, capture_timings, \
-    auto_cast_columns_to_string, columns_type_must_be_string, \
-    no_validation, DataFrameValidationFunc, \
-    FilterError, internal_bulk_exceptions, BulkCurvesNotFound
+from app.bulk_persistence.dask.errors import FilterError, internal_bulk_exceptions, BulkCurvesNotFound
+from app.bulk_persistence.dask.traces import trace_dataframe_attributes
+from app.bulk_persistence import DaskBulkStorage
+from app.bulk_persistence.dataframe_validators import auto_cast_columns_to_string, columns_type_must_be_string, \
+    no_validation, DataFrameValidationFunc
+from app.bulk_persistence import DataframeSerializerAsync
+from app.bulk_persistence.mime_types import MimeTypes, MimeType
+from app.bulk_persistence import JSONOrient
+from app.bulk_persistence import capture_timings
+
 from app.clients.storage_service_client import get_storage_record_service
 from app.context import get_ctx, Context
 from app.utils import OpenApiHandler
diff --git a/app/routers/common_parameters.py b/app/routers/common_parameters.py
index 4ab2d78fce0dfd0ae3950af4bd8edde1e3edd854..bfdf16b3d10fd791f05caefd2c4a8212be7660e7 100644
--- a/app/routers/common_parameters.py
+++ b/app/routers/common_parameters.py
@@ -1,7 +1,7 @@
 from fastapi import Query, Request, HTTPException
 from pandas import DataFrame
 
-from app.bulk_persistence import MimeType, MimeTypes
+from app.bulk_persistence.mime_types import MimeType, MimeTypes
 from app.bulk_persistence import JSONOrient
 
 
diff --git a/app/routers/ddms_v2/log_ddms_v2.py b/app/routers/ddms_v2/log_ddms_v2.py
index d05107bb33a1a20acf4bc5cad116d42142e91224..bb30a694abea7cb1c602ec566e133a23809b1073 100644
--- a/app/routers/ddms_v2/log_ddms_v2.py
+++ b/app/routers/ddms_v2/log_ddms_v2.py
@@ -38,7 +38,7 @@ from odes_storage.models import (
 from pydantic import BaseModel, Field
 
 from app.bulk_persistence import DataframeSerializerAsync, DataframeSerializerSync, JSONOrient, MimeTypes, get_dataframe
-from app.bulk_persistence import BulkURI
+from app.bulk_persistence.bulk_uri import BulkURI
 from app.clients.storage_service_client import get_storage_record_service
 from app.model.log_bulk import LogBulkHelper
 from app.model.model_curated import log
diff --git a/app/routers/ddms_v2/persistence.py b/app/routers/ddms_v2/persistence.py
index 4d6ea54df8f7422ba402a531a4389d4adc1c33e1..ce5eb4af3b06cc95c1dd9b4c95f5c4703c3402ca 100644
--- a/app/routers/ddms_v2/persistence.py
+++ b/app/routers/ddms_v2/persistence.py
@@ -16,10 +16,12 @@ import pandas as pd
 
 from odes_storage.models import Record
 
-from app.bulk_persistence import create_and_store_dataframe, get_dataframe, trace_dataframe_attributes
+from app.bulk_persistence import create_and_store_dataframe
+from app.bulk_persistence import get_dataframe
 from app.context import Context
 from app.model.log_bulk import LogBulkHelper
 
+from app.bulk_persistence.dask.traces import trace_dataframe_attributes
 from app.helper.traces import with_trace
 from app.helper.logger import get_logger
 
diff --git a/app/routers/delete/delete_bulk_data.py b/app/routers/delete/delete_bulk_data.py
index 53ef583636ba3ccd949ded382b43f86624f26c4c..e1544396d244065882db225ee465ad0176cc57c5 100644
--- a/app/routers/delete/delete_bulk_data.py
+++ b/app/routers/delete/delete_bulk_data.py
@@ -12,10 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from app.bulk_persistence import resolve_tenant, hash_record_id
+from app.bulk_persistence import resolve_tenant
 from osdu.core.api.storage.blob_storage_base import BlobStorageBase
 import asyncio
 
+from app.bulk_persistence.dask.storage_path_builder import hash_record_id
 from app.clients import StorageRecordServiceClient
 from app.clients.storage_service_client import get_storage_record_service
 from app.routers.bulk.bulk_uri_dependencies import BulkIdAccess
diff --git a/tests/unit/model/log_bulk_test.py b/tests/unit/model/log_bulk_test.py
index 31fd7ca431ed55c7c7b639f47df4724743e2fde1..b5483639f16e6390fba91b4721997f308a861dd2 100644
--- a/tests/unit/model/log_bulk_test.py
+++ b/tests/unit/model/log_bulk_test.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 from app.model.log_bulk import LogBulkHelper
-from app.bulk_persistence import BulkURI
+from app.bulk_persistence.bulk_uri import BulkURI
 from tests.unit.test_utils import basic_record
 import uuid
 import pytest
diff --git a/tests/unit/routers/filter_test.py b/tests/unit/routers/filter_test.py
index 2cebb3386fff90c0970e3544875613523e5bd44b..b7a76ba3db1105e3348915ee6cf446efe0d6737e 100644
--- a/tests/unit/routers/filter_test.py
+++ b/tests/unit/routers/filter_test.py
@@ -1,7 +1,8 @@
 import pytest
 
+from app.bulk_persistence.dask.errors import FilterError
 from app.bulk_persistence import GetDataParams, \
-    BulkReadFilterOperator, BulkReadFilters, FilterError
+    BulkReadFilterOperator, BulkReadFilters
 
 
 @pytest.mark.parametrize("filters, expected", [